Merge remote-tracking branch 'parent/master'

Conflicts: doc/04-schema.md
2015-06-23 14:19:12 +02:00 · 2015-06-23 14:19:12 +02:00 · 7d63eb5718
parent 865eab602f c43a39f733
commit 7d63eb5718
223 changed files with 9237 additions and 4857 deletions
--- a/.gitattributes
+++ b/.gitattributes
@ -0,0 +1,8 @@
 # Auto-detect text files, ensure they use LF.
 *       text=auto eol=lf
 # These files are always considered text and should use LF.
 # See core.whitespace @ http://git-scm.com/docs/git-config for whitespace flags.
 *.php   text eol=lf whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4 diff=php
 *.json  text eol=lf whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4
 *.test  text eol=lf whitespace=blank-at-eol,blank-at-eof,space-before-tab,tab-in-indent,tabwidth=4
--- a/.gitignore
+++ b/.gitignore
@ -8,3 +8,4 @@ phpunit.xml
 .vagrant
 Vagrantfile
 .idea
 .php_cs.cache
--- a/.php_cs
+++ b/.php_cs
@ -0,0 +1,18 @@
 <?php
 $finder = Symfony\CS\Finder\DefaultFinder::create()
    ->files()
    ->name('*.php')
    ->exclude('Fixtures')
    ->in(__DIR__.'/src')
    ->in(__DIR__.'/tests')
 ;
 return Symfony\CS\Config\Config::create()
    ->setUsingCache(true)
    ->level(Symfony\CS\FixerInterface::NONE_LEVEL)
    ->fixers(array(
        'psr0', 'encoding', 'short_tag', 'braces', 'elseif', 'eof_ending', 'function_declaration', 'indentation', 'line_after_namespace', 'linefeed', 'lowercase_constants', 'lowercase_keywords', 'multiple_use', 'php_closing_tag', 'trailing_spaces', 'visibility', 'duplicate_semicolon', 'extra_empty_lines', 'include', 'namespace_no_leading_whitespace', 'object_operator', 'operators_spaces', 'phpdoc_params', 'return', 'single_array_no_trailing_comma', 'spaces_cast', 'standardize_not_equal', 'ternary_spaces', 'unused_use', 'whitespacy_lines', 'multiline_array_tailing_comma',
    ))
    ->finder($finder)
 ;
--- a/.travis.yml
+++ b/.travis.yml
@ -1,23 +1,39 @@
 language: php
 sudo: false
 cache:
  directories:
    - $HOME/.composer/cache
 addons:
  apt_packages:
    - parallel
 php:
  - 5.3.3
  - 5.3
  - 5.4
  - 5.5
  - 5.6
  - 7.0
  - hhvm
  - hhvm-nightly
 matrix:
  fast_finish: true
  allow_failures:
    - php: hhvm-nightly
 before_script:
    - sudo apt-get install parallel
    - rm -f ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini
-    - composer install --prefer-source
+    - composer install
-    - bin/composer install --prefer-source
+    - bin/composer install
    - git config --global user.name travis-ci
    - git config --global user.email travis@example.com
 script:
-    - ls -d tests/Composer/Test/* | parallel --gnu --keep-order 'echo "Running {} tests"; ./vendor/bin/phpunit -c tests/complete.phpunit.xml {};'
+    - ls -d tests/Composer/Test/* | parallel --gnu --keep-order 'echo "Running {} tests"; ./vendor/bin/phpunit -c tests/complete.phpunit.xml --colors=always {} || (echo -e "\e[41mFAILED\e[0m {}" && $(exit 1));'
 git:
  depth: 5
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -1,4 +1,28 @@
-### 1.0.0-alpha9 (2014-12-07)
+### [1.0.0-alpha10] - 2015-04-14
  * Break: The following event classes are deprecated and you should update your script handlers to use the new ones in type hints:
    - `Composer\Script\CommandEvent` is deprecated, use `Composer\Script\Event`
    - `Composer\Script\PackageEvent` is deprecated, use `Composer\Installer\PackageEvent`
  * Break: Output is now split between stdout and stderr. Any irrelevant output to each command is on stderr as per unix best practices.
  * Added support for npm-style semver operators (`^` and `-` ranges, ` ` = AND, `||` = OR)
  * Added --prefer-lowest to `update` command to allow testing a package with the lowest declared dependencies
  * Added support for parsing semver build metadata `+anything` at the end of versions
  * Added --sort-packages option to `require` command for sorting dependencies
  * Added --no-autoloader to `install` and `update` commands to skip autoload generation
  * Added --list to `run-script` command to see available scripts
  * Added --absolute to `config` command to get back absolute paths
  * Added `classmap-authoritative` config option, if enabled only the classmap info will be used by the composer autoloader
  * Added support for branch-alias on numeric branches
  * Added support for the `https_proxy`/`HTTPS_PROXY` env vars used only for https URLs
  * Added support for using real composer repos as local paths in `create-project` command
  * Added --no-dev to `licenses` command
  * Added support for PHP 7.0 nightly builds
  * Fixed detection of stability when parsing multiple constraints
  * Fixed installs from lock file containing updated composer.json requirement
  * Fixed the autoloader suffix in vendor/autoload.php changing in every build
  * Many minor fixes, documentation additions and UX improvements
 ### [1.0.0-alpha9] - 2014-12-07
  * Added `remove` command to do the reverse of `require`
  * Added --ignore-platform-reqs to `install`/`update` commands to install even if you are missing a php extension or have an invalid php version
@ -28,7 +52,7 @@
  * Improved SVN and Perforce support
  * A boatload of minor fixes, documentation additions and UX improvements
-### 1.0.0-alpha8 (2014-01-06)
+### [1.0.0-alpha8] - 2014-01-06
  * Break: The `install` command now has --dev enabled by default. --no-dev can be used to install without dev requirements
  * Added `composer-plugin` package type to allow extensibility, and deprecated `composer-installer`
@ -59,7 +83,7 @@
  * Improved memory usage and performance of solving dependencies
  * Tons of minor bug fixes and improvements
-### 1.0.0-alpha7 (2013-05-04)
+### [1.0.0-alpha7] - 2013-05-04
  * Break: For forward compatibility, you should change your deployment scripts to run `composer install --no-dev`. The install command will install dev dependencies by default starting in the next release
  * Break: The `update` command now has --dev enabled by default. --no-dev can be used to update without dev requirements, but it will create an incomplete lock file and is discouraged
@ -110,10 +134,10 @@
  * Improved the coverage of the `validate` command
  * Tons of minor bug fixes and improvements
-### 1.0.0-alpha6 (2012-10-23)
+### [1.0.0-alpha6] - 2012-10-23
  * Schema: Added ability to pass additional options to repositories (i.e. ssh keys/client certificates to secure private repos)
-  * Schema: Added a new `~` operator that should be prefered over `>=`, see http://getcomposer.org/doc/01-basic-usage.md#package-versions
+  * Schema: Added a new `~` operator that should be preferred over `>=`, see http://getcomposer.org/doc/01-basic-usage.md#package-versions
  * Schema: Version constraints `<x.y` are assumed to be `<x.y-dev` unless specified as `<x.y-stable` to reduce confusion
  * Added `config` command to edit/list config values, including --global switch for system config
  * Added OAuth token support for the GitHub API
@ -121,7 +145,7 @@
  * Added --prefer-dist flag to force installs of dev packages from zip archives instead of clones
  * Added --working-dir (-d) flag to change the working directory
  * Added --profile flag to all commands to display execution time and memory usage
-  * Added `github-protocols` config key to define the order of prefered protocols for github.com clones
+  * Added `github-protocols` config key to define the order of preferred protocols for github.com clones
  * Added ability to interactively reset changes to vendor dirs while updating
  * Added support for hg bookmarks in the hg driver
  * Added support for svn repositories not following the standard trunk/branch/tags scheme
@ -135,7 +159,7 @@
  * Improved performance of a few essential code paths
  * Many bug small fixes and docs improvements
-### 1.0.0-alpha5 (2012-08-18)
+### [1.0.0-alpha5] - 2012-08-18
  * Added `dump-autoload` command to only regenerate the autoloader
  * Added --optimize to `dump-autoload` to generate a more performant classmap-based autoloader for production
@ -153,7 +177,7 @@
  * Improved error reporting on network failures and some other edge cases
  * Various minor bug fixes and docs improvements
-### 1.0.0-alpha4 (2012-07-04)
+### [1.0.0-alpha4] - 2012-07-04
  * Break: The default `minimum-stability` is now `stable`, [read more](https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion)
  * Break: Custom installers now receive the IO instance and a Composer instance in their constructor
@ -181,7 +205,7 @@
  * Cleaned up / refactored the dependency solver code as well as the output for unsolvable requirements
  * Various bug fixes and docs improvements
-### 1.0.0-alpha3 (2012-05-13)
+### [1.0.0-alpha3] - 2012-05-13
  * Schema: Added `require-dev` for development-time requirements (tests, etc), install with --dev
  * Schema: Added author.role to list the author's role in the project
@ -203,7 +227,7 @@
  * Fixed various bugs relating to package aliasing, proxy configuration, binaries
  * Various bug fixes and docs improvements
-### 1.0.0-alpha2 (2012-04-03)
+### [1.0.0-alpha2] - 2012-04-03
  * Added `create-project` command to install a project from scratch with composer
  * Added automated `classmap` autoloading support for non-PSR-0 compliant projects
@ -218,6 +242,16 @@
  * Removed dependency on filter_var
  * Various robustness & error handling improvements, docs fixes and more bug fixes
-### 1.0.0-alpha1 (2012-03-01)
+### 1.0.0-alpha1 - 2012-03-01
  * Initial release
 [1.0.0-alpha10]: https://github.com/composer/composer/compare/1.0.0-alpha9...1.0.0-alpha10
 [1.0.0-alpha9]: https://github.com/composer/composer/compare/1.0.0-alpha8...1.0.0-alpha9
 [1.0.0-alpha8]: https://github.com/composer/composer/compare/1.0.0-alpha7...1.0.0-alpha8
 [1.0.0-alpha7]: https://github.com/composer/composer/compare/1.0.0-alpha6...1.0.0-alpha7
 [1.0.0-alpha6]: https://github.com/composer/composer/compare/1.0.0-alpha5...1.0.0-alpha6
 [1.0.0-alpha5]: https://github.com/composer/composer/compare/1.0.0-alpha4...1.0.0-alpha5
 [1.0.0-alpha4]: https://github.com/composer/composer/compare/1.0.0-alpha3...1.0.0-alpha4
 [1.0.0-alpha3]: https://github.com/composer/composer/compare/1.0.0-alpha2...1.0.0-alpha3
 [1.0.0-alpha2]: https://github.com/composer/composer/compare/1.0.0-alpha1...1.0.0-alpha2
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -1,29 +1,47 @@
 Contributing to Composer
 ========================
 Please note that this project is released with a
 [Contributor Code of Conduct](http://contributor-covenant.org/version/1/0/0/).
 By participating in this project you agree to abide by its terms.
 Reporting Issues
 ----------------
 When reporting issues, please try to be as descriptive as possible, and include
 as much relevant information as you can. A step by step guide on how to
 reproduce the issue will greatly increase the chances of your issue being
 resolved in a timely manner.
 For example, if you are experiencing a problem while running one of the
 commands, please provide full output of said command in very very verbose mode
 (`-vvv`, e.g. `composer install -vvv`).
 If your issue involves installing, updating or resolving dependencies, the
 chance of us being able to reproduce your issue will be much higher if you
 share your `composer.json` with us.
 Installation from Source
 ------------------------
-Prior to contributing to Composer, you must use be able to run the tests.
+Prior to contributing to Composer, you must be able to run the test suite.
-To achieve this, you must use the sources and not the phar file.
+To achieve this, you need to acquire the Composer source code:
 1. Run `git clone https://github.com/composer/composer.git`
 2. Download the [`composer.phar`](https://getcomposer.org/composer.phar) executable
 3. Run Composer to get the dependencies: `cd composer && php ../composer.phar install`
-You can now run Composer by executing the `bin/composer` script: `php /path/to/composer/bin/composer`
+You can run the test suite by executing `vendor/bin/phpunit` when inside the
 composer directory, and run Composer by executing the `bin/composer`. To test
 your modified Composer code against another project, run `php
 /path/to/composer/bin/composer` inside that project's directory.
 Contributing policy
 -------------------
 All code contributions - including those of people having commit access -
 must go through a pull request and approved by a core developer before being
 merged. This is to ensure proper review of all the code.
 Fork the project, create a feature branch, and send us a pull request.
 To ensure a consistent code base, you should make sure the code follows
-the [Coding Standards](http://symfony.com/doc/current/contributing/code/standards.html)
+the [PSR-2 Coding Standards](http://www.php-fig.org/psr/psr-2/).
 which we borrowed from Symfony.
-If you would like to help, take a look at the [list of issues](http://github.com/composer/composer/issues).
+If you would like to help, take a look at the [list of issues](https://github.com/composer/composer/issues).
--- a/2
+++ b/2
@ -1,4 +1,4 @@
-Copyright (c) 2011 Nils Adermann, Jordi Boggiano
+Copyright (c) 2015 Nils Adermann, Jordi Boggiano
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
--- a/README.md
+++ b/README.md
@ -6,6 +6,8 @@ Composer helps you declare, manage and install dependencies of PHP projects, ens
 See [https://getcomposer.org/](https://getcomposer.org/) for more information and documentation.
 [![Build Status](https://travis-ci.org/composer/composer.svg?branch=master)](https://travis-ci.org/composer/composer)
 [![Dependency Status](https://www.versioneye.com/php/composer:composer/dev-master/badge.svg)](https://www.versioneye.com/php/composer:composer/dev-master) 
 [![Reference Status](https://www.versioneye.com/php/composer:composer/reference_badge.svg?style=flat)](https://www.versioneye.com/php/composer:composer/references)
 Installation / Usage
 --------------------
@ -19,7 +21,7 @@ Installation / Usage
 2. Create a composer.json defining your dependencies. Note that this example is
 a short version for applications that are not meant to be published as packages
 themselves. To create libraries/packages please read the
-[documentation](http://getcomposer.org/doc/02-libraries.md).
+[documentation](https://getcomposer.org/doc/02-libraries.md).
    ``` json
    {
@ -35,26 +37,27 @@ themselves. To create libraries/packages please read the
 Global installation of Composer (manual)
 ----------------------------------------
-Follow instructions [in the documentation](http://getcomposer.org/doc/00-intro.md#globally)
+Follow instructions [in the documentation](https://getcomposer.org/doc/00-intro.md#globally)
 Updating Composer
 -----------------
 Running `php composer.phar self-update` or equivalent will update a phar
-install with the latest version.
+install to the latest version.
 Community
 ---------
 Mailing lists for [user support](http://groups.google.com/group/composer-users) and
 [development](http://groups.google.com/group/composer-dev).
 IRC channels are on irc.freenode.org: [#composer](irc://irc.freenode.org/composer)
 for users and [#composer-dev](irc://irc.freenode.org/composer-dev) for development.
-Stack Overflow has a growing collection of
+For support, Stack Overflow also offers a good collection of
-[Composer related questions](http://stackoverflow.com/questions/tagged/composer-php).
+[Composer related questions](https://stackoverflow.com/questions/tagged/composer-php).
 Please note that this project is released with a
 [Contributor Code of Conduct](http://contributor-covenant.org/version/1/0/0/).
 By participating in this project and its community you agree to abide by those terms.
 Requirements
 ------------
@ -64,8 +67,8 @@ PHP 5.3.2 or above (at least 5.3.4 recommended to avoid potential bugs)
 Authors
 -------
-Nils Adermann - <naderman@naderman.de> - <http://twitter.com/naderman> - <http://www.naderman.de><br />
+Nils Adermann - <naderman@naderman.de> - <https://twitter.com/naderman> - <http://www.naderman.de><br />
-Jordi Boggiano - <j.boggiano@seld.be> - <http://twitter.com/seldaek> - <http://seld.be><br />
+Jordi Boggiano - <j.boggiano@seld.be> - <https://twitter.com/seldaek> - <http://seld.be><br />
 See also the list of [contributors](https://github.com/composer/composer/contributors) who participated in this project.
@ -78,6 +81,6 @@ Acknowledgments
 ---------------
 - This project's Solver started out as a PHP port of openSUSE's
-  [Libzypp satsolver](http://en.opensuse.org/openSUSE:Libzypp_satsolver).
+  [Libzypp satsolver](https://en.opensuse.org/openSUSE:Libzypp_satsolver).
 - This project uses hiddeninput.exe to prompt for passwords on windows, sources
  and details can be found on the [github page of the project](https://github.com/Seldaek/hidden-input).
--- a/bin/compile
+++ b/bin/compile
@ -1,6 +1,20 @@
 #!/usr/bin/env php
 <?php
 $cwd = getcwd();
 chdir(__DIR__.'/../');
 $ts = rtrim(shell_exec('git log -n1 --pretty=%ct HEAD'));
 if (!is_numeric($ts)) {
    echo 'Could not detect date using "git log -n1 --pretty=%ct HEAD"'.PHP_EOL;
    exit(1);
 }
 // Install with the current version to force it having the right ClassLoader version
 // Install without dev packages to clean up the included classmap from phpunit classes
 shell_exec('php bin/composer config autoloader-suffix ComposerPhar' . $ts);
 shell_exec('php bin/composer install -q --no-dev');
 shell_exec('php bin/composer config autoloader-suffix --unset');
 chdir($cwd);
 require __DIR__.'/../src/bootstrap.php';
 use Composer\Compiler;
@ -12,6 +26,6 @@ try {
    $compiler = new Compiler();
    $compiler->compile();
 } catch (\Exception $e) {
-    echo 'Failed to compile phar: ['.get_class($e).'] '.$e->getMessage().' at '.$e->getFile().':'.$e->getLine();
+    echo 'Failed to compile phar: ['.get_class($e).'] '.$e->getMessage().' at '.$e->getFile().':'.$e->getLine().PHP_EOL;
    exit(1);
 }
--- a/bin/composer
+++ b/bin/composer
@ -32,9 +32,9 @@ if (function_exists('ini_set')) {
    };
    $memoryLimit = trim(ini_get('memory_limit'));
-    // Increase memory_limit if it is lower than 512M
+    // Increase memory_limit if it is lower than 1GB
-    if ($memoryLimit != -1 && $memoryInBytes($memoryLimit) < 512 * 1024 * 1024) {
+    if ($memoryLimit != -1 && $memoryInBytes($memoryLimit) < 1024 * 1024 * 1024) {
-        @ini_set('memory_limit', '512M');
+        @ini_set('memory_limit', '1G');
    }
    unset($memoryInBytes, $memoryLimit);
 }
--- a/bin/fetch-spdx-identifiers
+++ b/bin/fetch-spdx-identifiers
@ -1,85 +0,0 @@
 #!/usr/bin/env php
 <?php
 $identifiers = new SPDXLicenseIdentifiersOnline;
 $printer = new JsonPrinter;
 $printer->printStringArray($identifiers->getStrings());
 /**
 * SPDX Identifier List from the registry.
 */
 class SPDXLicenseIdentifiersOnline
 {
    const REGISTRY = 'http://www.spdx.org/licenses/';
    const EXPRESSION = '//*[@typeof="spdx:License"]/code[@property="spdx:licenseId"]/text()';
    private $identifiers;
    /**
     * @return array
     */
    public function getStrings()
    {
        if ($this->identifiers) {
            return $this->identifiers;
        }
        $this->identifiers = $this->importNodesFromURL(
            self::REGISTRY,
            self::EXPRESSION
        );
        return $this->identifiers;
    }
    private function importNodesFromURL($url, $expressionTextNodes)
    {
        $doc = new DOMDocument();
        $doc->loadHTMLFile($url);
        $xp = new DOMXPath($doc);
        $codes = $xp->query($expressionTextNodes);
        if (!$codes) {
            throw new \Exception(sprintf('XPath query failed: %s', $expressionTextNodes));
        }
        if ($codes->length < 20) {
            throw new \Exception('Obtaining the license table failed, there can not be less than 20 identifiers.');
        }
        $identifiers = array();
        foreach ($codes as $code) {
            $identifiers[] = $code->nodeValue;
        }
        return $identifiers;
    }
 }
 /**
 * Print an array the way this script needs it.
 */
 class JsonPrinter
 {
    /**
     *
     * @param array $array
     */
    public function printStringArray(array $array)
    {
        $lines = array('');
        $line = &$lines[0];
        $last = count($array) - 1;
        foreach ($array as $item => $code) {
            $code = sprintf('"%s"%s', trim($code), $item === $last ? '' : ', ');
            $length = strlen($line) + strlen($code) - 1;
            if ($length > 76) {
                $line = rtrim($line);
                unset($line);
                $lines[] = $code;
                $line = &$lines[count($lines) - 1];
            } else {
                $line .= $code;
            }
        }
        $json = sprintf("[%s]", implode("\n    ", $lines));
        $json = str_replace(array("[\"", "\"]"), array("[\n    \"", "\"\n]"), $json);
        echo $json;
    }
 }
--- a/bin/update-spdx-licenses
+++ b/bin/update-spdx-licenses
@ -0,0 +1,9 @@
 #!/usr/bin/env php
 <?php
 require __DIR__ . '/../src/bootstrap.php';
 use Composer\Util\SpdxLicensesUpdater;
 $licenses = new SpdxLicensesUpdater;
 $licenses->update();
--- a/composer.json
+++ b/composer.json
@ -2,7 +2,7 @@
    "name": "composer/composer",
    "description": "Composer helps you declare, manage and install dependencies of PHP projects, ensuring you have the right stack everywhere.",
    "keywords": ["package", "dependency", "autoload"],
-    "homepage": "http://getcomposer.org/",
+    "homepage": "https://getcomposer.org/",
    "type": "library",
    "license": "MIT",
    "authors": [
@ -23,14 +23,23 @@
    },
    "require": {
        "php": ">=5.3.2",
-        "justinrainbow/json-schema": "~1.3",
+        "justinrainbow/json-schema": "~1.4",
        "seld/jsonlint": "~1.0",
-        "symfony/console": "~2.3",
+        "symfony/console": "~2.5",
        "symfony/finder": "~2.2",
-        "symfony/process": "~2.1"
+        "symfony/process": "~2.1",
        "seld/phar-utils": "~1.0",
        "seld/cli-prompt": "~1.0"
    },
    "require-dev": {
-        "phpunit/phpunit": "~4.0"
+        "phpunit/phpunit": "~4.5",
        "phpunit/phpunit-mock-objects": "2.3.0"
    },
    "_": "phpunit/phpunit-mock-objects required in 2.3.0 due to https://github.com/sebastianbergmann/phpunit-mock-objects/issues/223",
    "config": {
        "platform": {
            "php": "5.3.3"
        }
    },
    "suggest": {
        "ext-zip": "Enabling the zip extension allows you to unzip archives, and allows gzip compression of all internet traffic",
--- a/composer.lock
+++ b/composer.lock
@ -1,23 +1,23 @@
 {
    "_readme": [
        "This file locks the dependencies of your project to a known state",
-        "Read more about it at http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
        "This file is @generated automatically"
    ],
-    "hash": "2bc9cc8aa706b68d611d7058e4eb8de7",
+    "hash": "556ac817fc0b456bddc48918ef09930d",
    "packages": [
        {
            "name": "justinrainbow/json-schema",
-            "version": "1.3.7",
+            "version": "1.4.1",
            "source": {
                "type": "git",
                "url": "https://github.com/justinrainbow/json-schema.git",
-                "reference": "87b54b460febed69726c781ab67462084e97a105"
+                "reference": "2465fe486c864e30badaa4d005ebdf89dbc503f3"
            },
            "dist": {
                "type": "zip",
-                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/87b54b460febed69726c781ab67462084e97a105",
+                "url": "https://api.github.com/repos/justinrainbow/json-schema/zipball/2465fe486c864e30badaa4d005ebdf89dbc503f3",
-                "reference": "87b54b460febed69726c781ab67462084e97a105",
+                "reference": "2465fe486c864e30badaa4d005ebdf89dbc503f3",
                "shasum": ""
            },
            "require": {
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-                "sebastian/diff": "~1.1",
+                "sebastian/diff": "~1.2",
-                "sebastian/exporter": "~1.0"
+                "sebastian/exporter": "~1.2"
            },
            "require-dev": {
-                "phpunit/phpunit": "~4.1"
+                "phpunit/phpunit": "~4.4"
            },
            "type": "library",
            "extra": {
@ -760,20 +968,20 @@
                "compare",
                "equality"
            ],
-            "time": "2014-11-16 21:32:38"
+            "time": "2015-01-29 16:28:08"
        },
        {
            "name": "sebastian/diff",
-            "version": "1.2.0",
+            "version": "1.3.0",
            "source": {
                "type": "git",
                "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "5843509fed39dee4b356a306401e9dd1a931fec7"
+                "reference": "863df9687835c62aa423a22412d26fa2ebde3fd3"
            },
            "dist": {
                "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/5843509fed39dee4b356a306401e9dd1a931fec7",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/863df9687835c62aa423a22412d26fa2ebde3fd3",
-                "reference": "5843509fed39dee4b356a306401e9dd1a931fec7",
+                "reference": "863df9687835c62aa423a22412d26fa2ebde3fd3",
                "shasum": ""
            },
            "require": {
@ -785,7 +993,7 @@
            "type": "library",
            "extra": {
                "branch-alias": {
-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.3-dev"
                }
            },
            "autoload": {
@ -812,32 +1020,32 @@
            "keywords": [
                "diff"
            ],
-            "time": "2014-08-15 10:29:00"
+            "time": "2015-02-22 15:13:53"
        },
        {
            "name": "sebastian/environment",
-            "version": "1.2.1",
+            "version": "1.2.2",
            "source": {
                "type": "git",
                "url": "https://github.com/sebastianbergmann/environment.git",
-                "reference": "6e6c71d918088c251b181ba8b3088af4ac336dd7"
+                "reference": "5a8c7d31914337b69923db26c4221b81ff5a196e"
            },
            "dist": {
                "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/6e6c71d918088c251b181ba8b3088af4ac336dd7",
+                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/5a8c7d31914337b69923db26c4221b81ff5a196e",
-                "reference": "6e6c71d918088c251b181ba8b3088af4ac336dd7",
+                "reference": "5a8c7d31914337b69923db26c4221b81ff5a196e",
                "shasum": ""
            },
            "require": {
                "php": ">=5.3.3"
            },
            "require-dev": {
-                "phpunit/phpunit": "~4.3"
+                "phpunit/phpunit": "~4.4"
            },
            "type": "library",
            "extra": {
                "branch-alias": {
-                    "dev-master": "1.2.x-dev"
+                    "dev-master": "1.3.x-dev"
                }
            },
            "autoload": {
@ -862,32 +1070,33 @@
                "environment",
                "hhvm"
            ],
-            "time": "2014-10-25 08:00:45"
+            "time": "2015-01-01 10:01:08"
        },
        {
            "name": "sebastian/exporter",
-            "version": "1.0.2",
+            "version": "1.2.0",
            "source": {
                "type": "git",
                "url": "https://github.com/sebastianbergmann/exporter.git",
-                "reference": "c7d59948d6e82818e1bdff7cadb6c34710eb7dc0"
+                "reference": "84839970d05254c73cde183a721c7af13aede943"
            },
            "dist": {
                "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/c7d59948d6e82818e1bdff7cadb6c34710eb7dc0",
+                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/84839970d05254c73cde183a721c7af13aede943",
-                "reference": "c7d59948d6e82818e1bdff7cadb6c34710eb7dc0",
+                "reference": "84839970d05254c73cde183a721c7af13aede943",
                "shasum": ""
            },
            "require": {
-                "php": ">=5.3.3"
+                "php": ">=5.3.3",
                "sebastian/recursion-context": "~1.0"
            },
            "require-dev": {
-                "phpunit/phpunit": "~4.0"
+                "phpunit/phpunit": "~4.4"
            },
            "type": "library",
            "extra": {
                "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "1.2.x-dev"
                }
            },
            "autoload": {
@ -927,7 +1136,7 @@
                "export",
                "exporter"
            ],
-            "time": "2014-09-10 00:51:36"
+            "time": "2015-01-27 07:23:06"
        },
        {
            "name": "sebastian/global-state",
@ -981,17 +1190,70 @@
            "time": "2014-10-06 09:23:50"
        },
        {
-            "name": "sebastian/version",
+            "name": "sebastian/recursion-context",
-            "version": "1.0.4",
+            "version": "1.0.0",
            "source": {
                "type": "git",
-                "url": "https://github.com/sebastianbergmann/version.git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
-                "reference": "a77d9123f8e809db3fbdea15038c27a95da4058b"
+                "reference": "3989662bbb30a29d20d9faa04a846af79b276252"
            },
            "dist": {
                "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/a77d9123f8e809db3fbdea15038c27a95da4058b",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/3989662bbb30a29d20d9faa04a846af79b276252",
-                "reference": "a77d9123f8e809db3fbdea15038c27a95da4058b",
+                "reference": "3989662bbb30a29d20d9faa04a846af79b276252",
                "shasum": ""
            },
            "require": {
                "php": ">=5.3.3"
            },
            "require-dev": {
                "phpunit/phpunit": "~4.4"
            },
            "type": "library",
            "extra": {
                "branch-alias": {
                    "dev-master": "1.0.x-dev"
                }
            },
            "autoload": {
                "classmap": [
                    "src/"
                ]
            },
            "notification-url": "https://packagist.org/downloads/",
            "license": [
                "BSD-3-Clause"
            ],
            "authors": [
                {
                    "name": "Jeff Welch",
                    "email": "whatthejeff@gmail.com"
                },
                {
                    "name": "Sebastian Bergmann",
                    "email": "sebastian@phpunit.de"
                },
                {
                    "name": "Adam Harvey",
                    "email": "aharvey@php.net"
                }
            ],
            "description": "Provides functionality to recursively process PHP variables",
            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
            "time": "2015-01-24 09:48:32"
        },
        {
            "name": "sebastian/version",
            "version": "1.0.5",
            "source": {
                "type": "git",
                "url": "https://github.com/sebastianbergmann/version.git",
                "reference": "ab931d46cd0d3204a91e1b9a40c4bc13032b58e4"
            },
            "dist": {
                "type": "zip",
                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/ab931d46cd0d3204a91e1b9a40c4bc13032b58e4",
                "reference": "ab931d46cd0d3204a91e1b9a40c4bc13032b58e4",
                "shasum": ""
            },
            "type": "library",
@ -1013,26 +1275,29 @@
            ],
            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
            "homepage": "https://github.com/sebastianbergmann/version",
-            "time": "2014-12-15 14:25:24"
+            "time": "2015-02-24 06:35:25"
        },
        {
            "name": "symfony/yaml",
-            "version": "v2.6.1",
+            "version": "v2.6.9",
            "target-dir": "Symfony/Component/Yaml",
            "source": {
                "type": "git",
                "url": "https://github.com/symfony/Yaml.git",
-                "reference": "3346fc090a3eb6b53d408db2903b241af51dcb20"
+                "reference": "f157ab074e453ecd4c0fa775f721f6e67a99d9e2"
            },
            "dist": {
                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/Yaml/zipball/3346fc090a3eb6b53d408db2903b241af51dcb20",
+                "url": "https://api.github.com/repos/symfony/Yaml/zipball/f157ab074e453ecd4c0fa775f721f6e67a99d9e2",
-                "reference": "3346fc090a3eb6b53d408db2903b241af51dcb20",
+                "reference": "f157ab074e453ecd4c0fa775f721f6e67a99d9e2",
                "shasum": ""
            },
            "require": {
                "php": ">=5.3.3"
            },
            "require-dev": {
                "symfony/phpunit-bridge": "~2.7"
            },
            "type": "library",
            "extra": {
                "branch-alias": {
@ -1049,18 +1314,18 @@
                "MIT"
            ],
            "authors": [
                {
                    "name": "Symfony Community",
                    "homepage": "http://symfony.com/contributors"
                },
                {
                    "name": "Fabien Potencier",
                    "email": "fabien@symfony.com"
                },
                {
                    "name": "Symfony Community",
                    "homepage": "https://symfony.com/contributors"
                }
            ],
            "description": "Symfony Yaml Component",
-            "homepage": "http://symfony.com",
+            "homepage": "https://symfony.com",
-            "time": "2014-12-02 20:19:20"
+            "time": "2015-05-02 15:18:45"
        }
    ],
    "aliases": [],
@ -1071,5 +1336,8 @@
    "platform": {
        "php": ">=5.3.2"
    },
-    "platform-dev": []
+    "platform-dev": [],
    "platform-overrides": {
        "php": "5.3.3"
    }
 }
--- a/doc/00-intro.md
+++ b/doc/00-intro.md
@ -11,8 +11,8 @@ it manages them on a per-project basis, installing them in a directory (e.g. `ve
 inside your project. By default it will never install anything globally. Thus,
 it is a dependency manager.
-This idea is not new and Composer is strongly inspired by node's [npm](http://npmjs.org/)
+This idea is not new and Composer is strongly inspired by node's [npm](https://npmjs.org/)
-and ruby's [bundler](http://gembundler.com/). But there has not been such a tool
+and ruby's [bundler](http://bundler.io/). But there has not been such a tool
 for PHP.
 The problem that Composer solves is this:
@ -142,6 +142,8 @@ Create a new `composer.bat` file alongside `composer.phar`:
 C:\bin>echo @php "%~dp0composer.phar" %*>composer.bat
 ```
 Add the directory to your PATH environment variable if it isn't already.
 Close your current terminal. Test usage with a new terminal:
 ```sh
@ -179,7 +181,7 @@ downloads. To use it, just add the following line to your code's bootstrap
 process:
 ```php
-require 'vendor/autoload.php';
+require __DIR__ . '/vendor/autoload.php';
 ```
 Woah! Now start using monolog! To keep learning more about Composer, keep
--- a/doc/01-basic-usage.md
+++ b/doc/01-basic-usage.md
@ -45,7 +45,7 @@ smaller decoupled parts.
 ### Package Versions
-In the previous example we were requiring version `1.0.*` of monolog. This
+In the previous example we were requiring version [`1.0.*`](http://semver.mwl.be/#?package=monolog%2Fmonolog&version=1.0.*) of monolog. This
 means any version in the `1.0` development branch. It would match `1.0.0`,
 `1.0.2` or `1.0.20`.
@ -94,6 +94,13 @@ so using [stability flags](04-schema.md#package-links). To change that for all
 packages instead of doing per dependency you can also use the
 [minimum-stability](04-schema.md#minimum-stability) setting.
 ### Test version constraints
 You can test version constraints using [semver.mwl.be](http://semver.mwl.be). Fill in
 a package name and it will autofill the default version constraint which Composer would add
 to your `composer.json` file. You can adjust the version constraint and the tool will highlight
 all releases that match.
 ## Installing Dependencies
 To fetch the defined dependencies into your local project, just run the
@ -140,7 +147,7 @@ versions from `composer.json` and  create the lock file after executing the `upd
 command.
 This means that if any of the dependencies get a new version, you won't get the updates
-automatically. To update to the new version, use `update` command. This will fetch
+automatically. To update to the new version, use the `update` command. This will fetch
 the latest matching versions (according to your `composer.json` file) and also update
 the lock file with the new version.
--- a/doc/02-libraries.md
+++ b/doc/02-libraries.md
@ -96,9 +96,9 @@ Here are a few examples of valid tag names:
 ### Branches
 For every branch, a package development version will be created. If the branch
-name looks like a version, the version will be `{branchname}-dev`. For example
+name looks like a version, the version will be `{branchname}-dev`. For example,
-a branch `2.0` will get a version `2.0.x-dev` (the `.x` is added for technical
+the branch `2.0` will get the `2.0.x-dev` version (the `.x` is added for technical
-reasons, to make sure it is recognized as a branch, a `2.0.x` branch would also
+reasons, to make sure it is recognized as a branch). The `2.0.x` branch would also
 be valid and be turned into `2.0.x-dev` as well. If the branch does not look
 like a version, it will be `dev-{branchname}`. `master` results in a
 `dev-master` version.
@ -188,23 +188,23 @@ dependency in the `require` field.
 ## Publishing to packagist
-Alright, so now you can publish packages. But specifying the vcs repository
+Alright, so now you can publish packages. But specifying the VCS repository
 every time is cumbersome. You don't want to force all your users to do that.
 The other thing that you may have noticed is that we did not specify a package
-repository for `monolog/monolog`. How did that work? The answer is packagist.
+repository for `monolog/monolog`. How did that work? The answer is Packagist.
 [Packagist](https://packagist.org/) is the main package repository for
 Composer, and it is enabled by default. Anything that is published on
-packagist is available automatically through Composer. Since monolog
+Packagist is available automatically through Composer. Since monolog
 [is on packagist](https://packagist.org/packages/monolog/monolog), we can depend
 on it without having to specify any additional repositories.
 If we wanted to share `hello-world` with the world, we would publish it on
-packagist as well. Doing so is really easy.
+Packagist as well. Doing so is really easy.
 You simply hit the big "Submit Package" button and sign up. Then you submit
-the URL to your VCS repository, at which point packagist will start crawling
+the URL to your VCS repository, at which point Packagist will start crawling
 it. Once it is done, your package will be available to anyone.
 &larr; [Basic usage](01-basic-usage.md) |  [Command-line interface](03-cli.md) &rarr;
--- a/doc/03-cli.md
+++ b/doc/03-cli.md
@ -64,30 +64,31 @@ If there is a `composer.lock` file in the current directory, it will use the
 exact versions from there instead of resolving them. This ensures that
 everyone using the library will get the same versions of the dependencies.
-If there is no `composer.lock` file, composer will create one after dependency
+If there is no `composer.lock` file, Composer will create one after dependency
 resolution.
 ### Options
 * **--prefer-source:** There are two ways of downloading a package: `source`
-  and `dist`. For stable versions composer will use the `dist` by default.
+  and `dist`. For stable versions Composer will use the `dist` by default.
  The `source` is a version control repository. If `--prefer-source` is
-  enabled, composer will install from `source` if there is one. This is
+  enabled, Composer will install from `source` if there is one. This is
  useful if you want to make a bugfix to a project and get a local git
  clone of the dependency directly.
-* **--prefer-dist:** Reverse of `--prefer-source`, composer will install
+* **--prefer-dist:** Reverse of `--prefer-source`, Composer will install
  from `dist` if possible. This can speed up installs substantially on build
  servers and other use cases where you typically do not run updates of the
  vendors. It is also a way to circumvent problems with git if you do not
  have a proper setup.
 * **--ignore-platform-reqs:** ignore `php`, `hhvm`, `lib-*` and `ext-*`
  requirements and force the installation even if the local machine does not
-  fulfill these.
+  fulfill these. See also the [`platform`](06-config.md#platform) config option.
 * **--dry-run:** If you want to run through an installation without actually
  installing a package, you can use `--dry-run`. This will simulate the
  installation and show you what would happen.
 * **--dev:** Install packages listed in `require-dev` (this is the default behavior).
-* **--no-dev:** Skip installing packages listed in `require-dev`. The autoloader generation skips the `autoload-dev` rules.
+* **--no-dev:** Skip installing packages listed in `require-dev`. The autoloader 
  generation skips the `autoload-dev` rules.
 * **--no-autoloader:** Skips autoloader generation.
 * **--no-scripts:** Skips execution of scripts defined in `composer.json`.
 * **--no-plugins:** Disables plugins.
@ -127,7 +128,7 @@ php composer.phar update vendor/*
 * **--prefer-dist:** Install packages from `dist` when available.
 * **--ignore-platform-reqs:** ignore `php`, `hhvm`, `lib-*` and `ext-*`
  requirements and force the installation even if the local machine does not
-  fulfill these.
+  fulfill these. See also the [`platform`](06-config.md#platform) config option.
 * **--dry-run:** Simulate the command without actually doing anything.
 * **--dev:** Install packages listed in `require-dev` (this is the default behavior).
 * **--no-dev:** Skip installing packages listed in `require-dev`. The autoloader generation skips the `autoload-dev` rules.
@ -171,7 +172,7 @@ php composer.phar require vendor/package:2.* vendor/package2:dev-master
 * **--prefer-dist:** Install packages from `dist` when available.
 * **--ignore-platform-reqs:** ignore `php`, `hhvm`, `lib-*` and `ext-*`
  requirements and force the installation even if the local machine does not
-  fulfill these.
+  fulfill these. See also the [`platform`](06-config.md#platform) config option.
 * **--dev:** Add packages to `require-dev`.
 * **--no-update:** Disables the automatic update of the dependencies.
 * **--no-progress:** Removes the progress display that can mess with some
@ -195,7 +196,7 @@ uninstalled.
 ### Options
 * **--ignore-platform-reqs:** ignore `php`, `hhvm`, `lib-*` and `ext-*`
  requirements and force the installation even if the local machine does not
-  fulfill these.
+  fulfill these. See also the [`platform`](06-config.md#platform) config option.
 * **--dev:** Remove packages from `require-dev`.
 * **--no-update:** Disables the automatic update of the dependencies.
 * **--no-progress:** Removes the progress display that can mess with some
@ -259,8 +260,8 @@ name     : monolog/monolog
 versions : master-dev, 1.0.2, 1.0.1, 1.0.0, 1.0.0-RC1
 type     : library
 names    : monolog/monolog
-source   : [git] http://github.com/Seldaek/monolog.git 3d4e60d0cbc4b888fe5ad223d77964428b1978da
+source   : [git] https://github.com/Seldaek/monolog.git 3d4e60d0cbc4b888fe5ad223d77964428b1978da
-dist     : [zip] http://github.com/Seldaek/monolog/zipball/3d4e60d0cbc4b888fe5ad223d77964428b1978da 3d4e60d0cbc4b888fe5ad223d77964428b1978da
+dist     : [zip] https://github.com/Seldaek/monolog/zipball/3d4e60d0cbc4b888fe5ad223d77964428b1978da 3d4e60d0cbc4b888fe5ad223d77964428b1978da
 license  : MIT
 autoload
@ -326,7 +327,7 @@ php composer.phar validate
 ### Options
-* **--no-check-all:** Whether or not composer do a complete validation.
+* **--no-check-all:** Whether or not Composer does a complete validation.
 ## status
@ -351,7 +352,7 @@ vendor/seld/jsonlint:
 ## self-update
-To update composer itself to the latest version, just run the `self-update`
+To update Composer itself to the latest version, just run the `self-update`
 command. It will replace your `composer.phar` with the latest version.
 ```sh
@ -364,7 +365,7 @@ If you would like to instead update to a specific release simply specify it:
 php composer.phar self-update 1.0.0-alpha7
 ```
-If you have installed composer for your entire system (see [global installation](00-intro.md#globally)),
+If you have installed Composer for your entire system (see [global installation](00-intro.md#globally)),
 you may have to run the command with `root` privileges
 ```sh
@ -374,11 +375,12 @@ sudo composer self-update
 ### Options
 * **--rollback (-r):** Rollback to the last version you had installed.
-* **--clean-backups:** Delete old backups during an update. This makes the current version of composer the only backup available after the update.
+* **--clean-backups:** Delete old backups during an update. This makes the 
  current version of Composer the only backup available after the update.
 ## config
-The `config` command allows you to edit some basic composer settings in either
+The `config` command allows you to edit some basic Composer settings in either
 the local composer.json file or the global config.json file.
 ```sh
@ -393,8 +395,7 @@ php composer.phar config --list
 configuration value.  For settings that can take an array of values (like
 `github-protocols`), more than one setting-value arguments are allowed.
-See the [config schema section](04-schema.md#config) for valid configuration
+See the [Config](06-config.md) chapter for valid configuration options.
 options.
 ### Options
@ -418,13 +419,13 @@ In addition to modifying the config section, the `config` command also supports
 changes to the repositories section by using it the following way:
 ```sh
-php composer.phar config repositories.foo vcs http://github.com/foo/bar
+php composer.phar config repositories.foo vcs https://github.com/foo/bar
 ```
 ## create-project
 You can use Composer to create new projects from an existing package. This is
-the equivalent of doing a git clone/svn checkout followed by a composer install
+the equivalent of doing a git clone/svn checkout followed by a "composer install"
 of the vendors.
 There are several applications for this:
@ -434,7 +435,7 @@ There are several applications for this:
 3. Projects with multiple developers can use this feature to bootstrap the
   initial application for development.
-To create a new project using composer you can use the "create-project" command.
+To create a new project using Composer you can use the "create-project" command.
 Pass it a package name, and the directory to create the project in. You can also
 provide a version as third argument, otherwise the latest version is used.
@ -507,8 +508,13 @@ Lists the name, version and license of every package installed. Use
 ## run-script
 ### Options
 * **--no-dev:** Disable dev mode
 * **--list:** List user defined scripts
 To run [scripts](articles/scripts.md) manually you can use this command,
-just give it the script name and optionally --no-dev to disable the dev mode.
+just give it the script name and optionally any required arguments.
 ## diagnose
@ -569,7 +575,7 @@ not be guessed from VCS info and is not present in `composer.json`.
 ### COMPOSER_VENDOR_DIR
-By setting this var you can make composer install the dependencies into a
+By setting this var you can make Composer install the dependencies into a
 directory other than `vendor`.
 ### COMPOSER_BIN_DIR
@ -579,7 +585,7 @@ directory to something other than `vendor/bin`.
 ### http_proxy or HTTP_PROXY
-If you are using composer from behind an HTTP proxy, you can use the standard
+If you are using Composer from behind an HTTP proxy, you can use the standard
 `http_proxy` or `HTTP_PROXY` env vars. Simply set it to the URL of your proxy.
 Many operating systems already set this variable for you.
@ -601,18 +607,18 @@ can also set it to `*` to ignore the proxy for all HTTP requests.
 ### HTTP_PROXY_REQUEST_FULLURI
 If you use a proxy but it does not support the request_fulluri flag, then you
-should set this env var to `false` or `0` to prevent composer from setting the
+should set this env var to `false` or `0` to prevent Composer from setting the
 request_fulluri option.
 ### HTTPS_PROXY_REQUEST_FULLURI
 If you use a proxy but it does not support the request_fulluri flag for HTTPS
-requests, then you should set this env var to `false` or `0` to prevent composer
+requests, then you should set this env var to `false` or `0` to prevent Composer
 from setting the request_fulluri option.
 ### COMPOSER_HOME
-The `COMPOSER_HOME` var allows you to change the composer home directory. This
+The `COMPOSER_HOME` var allows you to change the Composer home directory. This
 is a hidden, global (per-user on the machine) directory that is shared between
 all projects.
@ -628,32 +634,32 @@ You may put a `config.json` file into the location which `COMPOSER_HOME` points
 to. Composer will merge this configuration with your project's `composer.json`
 when you run the `install` and `update` commands.
-This file allows you to set [configuration](04-schema.md#config) and
+This file allows you to set [repositories](05-repositories.md) and
-[repositories](05-repositories.md) for the user's projects.
+[configuration](06-config.md) for the user's projects.
 In case global configuration matches _local_ configuration, the _local_
 configuration in the project's `composer.json` always wins.
 ### COMPOSER_CACHE_DIR
-The `COMPOSER_CACHE_DIR` var allows you to change the composer cache directory,
+The `COMPOSER_CACHE_DIR` var allows you to change the Composer cache directory,
-which is also configurable via the [`cache-dir`](04-schema.md#config) option.
+which is also configurable via the [`cache-dir`](06-config.md#cache-dir) option.
 By default it points to $COMPOSER_HOME/cache on \*nix and OSX, and
 `C:\Users\<user>\AppData\Local\Composer` (or `%LOCALAPPDATA%/Composer`) on Windows.
 ### COMPOSER_PROCESS_TIMEOUT
-This env var controls the time composer waits for commands (such as git
+This env var controls the time Composer waits for commands (such as git
 commands) to finish executing. The default value is 300 seconds (5 minutes).
 ### COMPOSER_DISCARD_CHANGES
-This env var controls the discard-changes [config option](04-schema.md#config).
+This env var controls the [`discard-changes`](06-config.md#discard-changes) config option.
 ### COMPOSER_NO_INTERACTION
-If set to 1, this env var will make composer behave as if you passed the
+If set to 1, this env var will make Composer behave as if you passed the
 `--no-interaction` flag to every command. This can be set on build boxes/CI.
 &larr; [Libraries](02-libraries.md)  |  [Schema](04-schema.md) &rarr;
--- a/doc/04-schema.md
+++ b/doc/04-schema.md
@ -20,9 +20,6 @@ this is the `config` field. Only the root package can define configuration.
 The config of dependencies is ignored. This makes the `config` field
 `root-only`.
 If you clone one of those dependencies to work on it, then that package is the
 root package. The `composer.json` is identical, but the context is different.
 > **Note:** A package can be the root package or not, depending on the context.
 > For example, if your project depends on the `monolog` library, your project
 > is the root package. However, if you clone `monolog` from GitHub in order to
@ -87,7 +84,7 @@ that needs some special logic, you can define a custom type. This could be a
 all be specific to certain projects, and they will need to provide an
 installer capable of installing packages of that type.
-Out of the box, composer supports four types:
+Out of the box, Composer supports four types:
 - **library:** This is the default. It will simply copy the files to `vendor`.
 - **project:** This denotes a project rather than a library. For example
@ -157,7 +154,7 @@ The recommended notation for the most common licenses is (alphabetical):
 - MIT
 Optional, but it is highly recommended to supply this. More identifiers are
-listed at the [SPDX Open Source License Registry](http://www.spdx.org/licenses/).
+listed at the [SPDX Open Source License Registry](https://www.spdx.org/licenses/).
 For closed-source software, you may use `"proprietary"` as the license identifier.
@ -235,11 +232,12 @@ Various information to get support about the project.
 Support information includes the following:
 * **email:** Email address for support.
-* **issues:** URL to the Issue Tracker.
+* **issues:** URL to the issue tracker.
-* **forum:** URL to the Forum.
+* **forum:** URL to the forum.
-* **wiki:** URL to the Wiki.
+* **wiki:** URL to the wiki.
 * **irc:** IRC channel for support, as irc://server/channel.
 * **source:** URL to browse or download the sources.
 * **docs:** URL to the documentation.
 An example:
@ -271,7 +269,7 @@ Example:
 All links are optional fields.
-`require` and `require-dev` additionally support stability flags (root-only).
+`require` and `require-dev` additionally support stability flags ([root-only](04-schema.md#root-package)).
 These allow you to further restrict or expand the stability of a package beyond
 the scope of the [minimum-stability](#minimum-stability) setting. You can apply
 them to a constraint, or just apply them to an empty constraint if you want to
@ -334,7 +332,7 @@ aliases article](articles/aliases.md).
 Lists packages required by this package. The package will not be installed
 unless those requirements can be met.
-#### require-dev <span>(root-only)</span>
+#### require-dev <span>([root-only](04-schema.md#root-package))</span>
 Lists packages required for developing this package, or running
 tests, etc. The dev requirements of the root package are installed by default.
@ -554,7 +552,7 @@ Example:
 }
 ```
-### autoload-dev <span>(root-only)</span>
+### autoload-dev <span>([root-only](04-schema.md#root-package))</span>
 This section allows to define autoload rules for development purposes.
@ -627,7 +625,7 @@ To do that, `autoload` and `target-dir` are defined as follows:
 Optional.
-### minimum-stability <span>(root-only)</span>
+### minimum-stability <span>([root-only](04-schema.md#root-package))</span>
 This defines the default behavior for filtering packages by stability. This
 defaults to `stable`, so if you rely on a `dev` package, you should specify
@ -642,7 +640,7 @@ a given package can be done in `require` or `require-dev` (see
 Available options (in order of stability) are `dev`, `alpha`, `beta`, `RC`,
 and `stable`.
-### prefer-stable <span>(root-only)</span>
+### prefer-stable <span>([root-only](04-schema.md#root-package))</span>
 When this is enabled, Composer will prefer more stable packages over unstable
 ones when finding compatible stable packages is possible. If you require a
@ -651,11 +649,11 @@ selected granted that the minimum-stability allows for it.
 Use `"prefer-stable": true` to enable.
-### repositories <span>(root-only)</span>
+### repositories <span>([root-only](04-schema.md#root-package))</span>
 Custom package repositories to use.
-By default composer just uses the packagist repository. By specifying
+By default Composer just uses the packagist repository. By specifying
 repositories you can get packages from elsewhere.
 Repositories are not resolved recursively. You can only add them to your main
@ -664,14 +662,14 @@ ignored.
 The following repository types are supported:
-* **composer:** A composer repository is simply a `packages.json` file served
+* **composer:** A Composer repository is simply a `packages.json` file served
  via the network (HTTP, FTP, SSH), that contains a list of `composer.json`
  objects with additional `dist` and/or `source` information. The `packages.json`
  file is loaded using a PHP stream. You can set extra options on that stream
  using the `options` parameter.
 * **vcs:** The version control system repository can fetch packages from git,
  svn and hg repositories.
-* **pear:** With this you can import any pear repository into your composer
+* **pear:** With this you can import any pear repository into your Composer
  project.
 * **package:** If you depend on a project that does not have any support for
  composer whatsoever you can define the package inline using a `package`
@ -703,7 +701,7 @@ Example:
        },
        {
            "type": "pear",
-            "url": "http://pear2.php.net"
+            "url": "https://pear2.php.net"
        },
        {
            "type": "package",
@ -715,7 +713,7 @@ Example:
                    "type": "zip"
                },
                "source": {
-                    "url": "http://smarty-php.googlecode.com/svn/",
+                    "url": "https://smarty-php.googlecode.com/svn/",
                    "type": "svn",
                    "reference": "tags/Smarty_3_1_7/distribution/"
                }
@ -730,100 +728,12 @@ will look from the first to the last repository, and pick the first match.
 By default Packagist is added last which means that custom repositories can
 override packages from it.
-### config <span>(root-only)</span>
+### config <span>([root-only](04-schema.md#root-package))</span>
-A set of configuration options. It is only used for projects.
+A set of configuration options. It is only used for projects. See 
 [Config](06-config.md) for a description of each individual option.
-The following options are supported:
+### scripts <span>([root-only](04-schema.md#root-package))</span>
 * **process-timeout:** Defaults to `300`. The duration processes like git clones
  can run before Composer assumes they died out. You may need to make this
  higher if you have a slow connection or huge vendors.
 * **use-include-path:** Defaults to `false`. If true, the Composer autoloader
  will also look for classes in the PHP include path.
 * **preferred-install:** Defaults to `auto` and can be any of `source`, `dist` or
  `auto`. This option allows you to set the install method Composer will prefer to
  use.
 * **store-auths:** What to do after prompting for authentication, one of:
  `true` (always store), `false` (do not store) and `"prompt"` (ask every
  time), defaults to `"prompt"`.
 * **github-protocols:** Defaults to `["git", "https", "ssh"]`. A list of protocols to
  use when cloning from github.com, in priority order. You can reconfigure it to
  for example prioritize the https protocol if you are behind a proxy or have somehow
  bad performances with the git protocol.
 * **github-oauth:** A list of domain names and oauth keys. For example using
  `{"github.com": "oauthtoken"}` as the value of this option will use `oauthtoken`
  to access private repositories on github and to circumvent the low IP-based
  rate limiting of their API.
  [Read more](articles/troubleshooting.md#api-rate-limit-and-oauth-tokens)
  on how to get an OAuth token for GitHub.
 * **http-basic:** A list of domain names and username/passwords to authenticate
  against them. For example using
  `{"example.org": {"username": "alice", "password": "foo"}` as the value of this
  option will let composer authenticate against example.org.
 * **vendor-dir:** Defaults to `vendor`. You can install dependencies into a
  different directory if you want to. `$HOME` and `~` will be replaced by your
  home directory's path in vendor-dir and all `*-dir` options below.
 * **bin-dir:** Defaults to `vendor/bin`. If a project includes binaries, they
  will be symlinked into this directory.
 * **cache-dir:** Defaults to `C:\Users\<user>\AppData\Local\Composer` on Windows,
  `$XDG_CACHE_HOME/composer` on unix systems that follow the XDG Base Directory
  Specifications, and `$home/cache` on other unix systems. Stores all the caches
  used by composer. See also [COMPOSER_HOME](03-cli.md#composer-home).
 * **cache-files-dir:** Defaults to `$cache-dir/files`. Stores the zip archives
  of packages.
 * **cache-repo-dir:** Defaults to `$cache-dir/repo`. Stores repository metadata
  for the `composer` type and the VCS repos of type `svn`, `github` and `bitbucket`.
 * **cache-vcs-dir:** Defaults to `$cache-dir/vcs`. Stores VCS clones for
  loading VCS repository metadata for the `git`/`hg` types and to speed up installs.
 * **cache-files-ttl:** Defaults to `15552000` (6 months). Composer caches all
  dist (zip, tar, ..) packages that it downloads. Those are purged after six
  months of being unused by default. This option allows you to tweak this
  duration (in seconds) or disable it completely by setting it to 0.
 * **cache-files-maxsize:** Defaults to `300MiB`. Composer caches all
  dist (zip, tar, ..) packages that it downloads. When the garbage collection
  is periodically ran, this is the maximum size the cache will be able to use.
  Older (less used) files will be removed first until the cache fits.
 * **prepend-autoloader:** Defaults to `true`. If false, the composer autoloader
  will not be prepended to existing autoloaders. This is sometimes required to fix
  interoperability issues with other autoloaders.
 * **autoloader-suffix:** Defaults to `null`. String to be used as a suffix for
  the generated Composer autoloader. When null a random one will be generated.
 * **optimize-autoloader** Defaults to `false`. Always optimize when dumping
  the autoloader.
 * **classmap-authoritative:** Defaults to `false`. If true, the composer
  autoloader will not scan the filesystem for classes that are not found in
  the class map. Implies 'optimize-autoloader'.
 * **github-domains:** Defaults to `["github.com"]`. A list of domains to use in
  github mode. This is used for GitHub Enterprise setups.
 * **github-expose-hostname:** Defaults to `true`. If set to false, the OAuth
  tokens created to access the github API will have a date instead of the
  machine hostname.
 * **notify-on-install:** Defaults to `true`. Composer allows repositories to
  define a notification URL, so that they get notified whenever a package from
  that repository is installed. This option allows you to disable that behaviour.
 * **discard-changes:** Defaults to `false` and can be any of `true`, `false` or
  `"stash"`. This option allows you to set the default style of handling dirty
  updates when in non-interactive mode. `true` will always discard changes in
  vendors, while `"stash"` will try to stash and reapply. Use this for CI
  servers or deploy scripts if you tend to have modified vendors.
 Example:
 ```json
 {
    "config": {
        "bin-dir": "bin"
    }
 }
 ```
 > **Note:** Authentication-related config options like `http-basic` and
 > `github-oauth` can also be specified inside a `auth.json` file that goes
 > besides your `composer.json`. That way you can gitignore it and every
 > developer can place their own credentials in there.
 ### scripts <span>(root-only)</span>
 Composer allows you to hook into various parts of the installation process
 through the use of scripts.
@ -879,4 +789,39 @@ The example will include `/dir/foo/bar/file`, `/foo/bar/baz`, `/file.php`,
 Optional.
 ### non-feature-branches
 A list of regex patterns of branch names that are non-numeric (e.g. "latest" or something), 
 that will NOT be handled as feature branches. This is an array of strings.
 If you have non-numeric branch names, for example like "latest", "current", "latest-stable"
 or something, that do not look like a version number, then Composer handles such branches
 as feature branches. This means it searches for parent branches, that look like a version
 or ends at special branches (like master) and the root package version number becomes the
 version of the parent branch or at least master or something.
 To handle non-numeric named branches as versions instead of searching for a parent branch
 with a valid version or special branch name like master, you can set patterns for branch
 names, that should be handled as dev version branches.
 This is really helpful when you have dependencies using "self.version", so that not dev-master,
 but the same branch is installed (in the example: latest-testing).
 An example:
 If you have a testing branch, that is heavily maintained during a testing phase and is
 deployed to your staging environment, normally "composer show -s" will give you `versions : * dev-master`.
 If you configure `latest-.*` as a pattern for non-feature-branches like this:
 ```json
 {
    "non-feature-branches": ["latest-.*"]
 }
 ```
 Then "composer show -s" will give you `versions : * dev-latest-testing`.
 Optional.
 &larr; [Command-line interface](03-cli.md)  |  [Repositories](05-repositories.md) &rarr;
--- a/doc/05-repositories.md
+++ b/doc/05-repositories.md
@ -6,7 +6,7 @@ of repositories are available, and how they work.
 ## Concepts
 Before we look at the different types of repositories that exist, we need to
-understand some of the basic concepts that composer is built on.
+understand some of the basic concepts that Composer is built on.
 ### Package
@ -16,8 +16,8 @@ code, but in theory it could be anything. And it contains a package
 description which has a name and a version. The name and the version are used
 to identify the package.
-In fact, internally composer sees every version as a separate package. While
+In fact, internally Composer sees every version as a separate package. While
-this distinction does not matter when you are using composer, it's quite
+this distinction does not matter when you are using Composer, it's quite
 important when you want to change it.
 In addition to the name and the version, there is useful metadata. The information
@ -103,7 +103,7 @@ It may include any of the other fields specified in the [schema](04-schema.md).
 #### notify-batch
-The `notify-batch` field allows you to specify an URL that will be called
+The `notify-batch` field allows you to specify a URL that will be called
 every time a user installs a package. The URL can be either an absolute path
 (that will use the same domain as the repository) or a fully qualified URL.
@ -216,7 +216,7 @@ repository.
 The `packages.json` file is loaded using a PHP stream. You can set extra options
 on that stream using the `options` parameter. You can set any valid PHP stream
-context option. See [Context options and parameters](http://php.net/manual/en/context.php)
+context option. See [Context options and parameters](https://php.net/manual/en/context.php)
 for more information.
 ### VCS
@ -234,7 +234,7 @@ project to use the patched version. If the library is on GitHub (this is the
 case most of the time), you can simply fork it there and push your changes to
 your fork. After that you update the project's `composer.json`. All you have
 to do is add your fork as a repository and update the version constraint to
-point to your custom branch. For version constraint naming conventions see
+point to your custom branch. Your custom branch name must be prefixed with `"dev-"`. For version constraint naming conventions see
 [Libraries](02-libraries.md) for more information.
 Example assuming you patched monolog to fix a bug in the `bugfix` branch:
@ -293,8 +293,8 @@ The only requirement is the installation of SSH keys for a git client.
 Git is not the only version control system supported by the VCS repository.
 The following are supported:
-* **Git:** [git-scm.com](http://git-scm.com)
+* **Git:** [git-scm.com](https://git-scm.com)
-* **Subversion:** [subversion.apache.org](http://subversion.apache.org)
+* **Subversion:** [subversion.apache.org](https://subversion.apache.org)
 * **Mercurial:** [mercurial.selenic.com](http://mercurial.selenic.com)
 To get packages from these systems you need to have their respective clients
@ -312,7 +312,7 @@ should you need to specify one for whatever reason, you can use `git`, `svn` or
 If you set the `no-api` key to `true` on a github repository it will clone the
 repository as it would with any other git repository instead of using the
-GitHub API. But unlike using the `git` driver directly, composer will still
+GitHub API. But unlike using the `git` driver directly, Composer will still
 attempt to use github's zip files.
 #### Subversion Options
@ -341,7 +341,7 @@ If you have no branches or tags directory you can disable them entirely by
 setting the `branches-path` or `tags-path` to `false`.
 If the package is in a sub-directory, e.g. `/trunk/foo/bar/composer.json` and
-`/tags/1.0/foo/bar/composer.json`, then you can make composer access it by
+`/tags/1.0/foo/bar/composer.json`, then you can make Composer access it by
 setting the `"package-path"` option to the sub-directory, in this example it
 would be `"package-path": "foo/bar/"`.
@ -389,7 +389,7 @@ Example using `pear2.php.net`:
    "repositories": [
        {
            "type": "pear",
-            "url": "http://pear2.php.net"
+            "url": "https://pear2.php.net"
        }
    ],
    "require": {
@ -462,7 +462,7 @@ and `IntermediatePackage` from a Github repository:
 ### Package
-If you want to use a project that does not support composer through any of the
+If you want to use a project that does not support Composer through any of the
 means above, you still can define the package yourself by using a `package`
 repository.
@ -517,7 +517,7 @@ Typically you would leave the source part off, as you don't really need it.
 While you will probably want to put your packages on packagist most of the time,
 there are some use cases for hosting your own repository.
-* **Private company packages:** If you are part of a company that uses composer
+* **Private company packages:** If you are part of a company that uses Composer
  for their packages internally, you might want to keep those packages private.
 * **Separate ecosystem:** If you have a project which has its own ecosystem,
@ -533,19 +533,22 @@ There are a few tools that can help you create a `composer` repository.
 ### Packagist
 The underlying application used by packagist is open source. This means that you
-can just install your own copy of packagist, re-brand, and use it. It's really
+can technically install your own copy of packagist. However it is not a
-quite straight-forward to do. However due to its size and complexity, for most
+supported use case and changes will happen without caring for third parties
-small and medium sized companies willing to track a few packages will be better
+using the code.
 off using Satis.
 Packagist is a Symfony2 application, and it is [available on
-GitHub](https://github.com/composer/packagist). It uses composer internally and
+GitHub](https://github.com/composer/packagist). It uses Composer internally and
-acts as a proxy between VCS repositories and the composer users. It holds a list
+acts as a proxy between VCS repositories and the Composer users. It holds a list
-of all VCS packages, periodically re-crawls them, and exposes them as a composer
+of all VCS packages, periodically re-crawls them, and exposes them as a Composer
 repository.
-To set your own copy, simply follow the instructions from the [packagist
+### Toran Proxy
-github repository](https://github.com/composer/packagist).
+
 [Toran Proxy](https://toranproxy.com/) is a web app much like Packagist but
 providing private package hosting as well as mirroring/proxying of GitHub and 
 packagist.org. Check its homepage and the [Satis/Toran Proxy article](articles/handling-private-packages-with-satis.md)
 for more information.
 ### Satis
@ -614,4 +617,4 @@ You can disable the default Packagist repository by adding this to your
 }
 ```
-&larr; [Schema](04-schema.md)  |  [Community](06-community.md) &rarr;
+&larr; [Schema](04-schema.md)  |  [Config](06-config.md) &rarr;
--- a/doc/06-config.md
+++ b/doc/06-config.md
@ -0,0 +1,172 @@
 # Config
 This chapter will describe the `config` section of the `composer.json` 
 [schema](04-schema.md).
 ## process-timeout
 Defaults to `300`. The duration processes like git clones can run before
 Composer assumes they died out. You may need to make this higher if you have a
 slow connection or huge vendors.
 ## use-include-path
 Defaults to `false`. If `true`, the Composer autoloader will also look for classes
 in the PHP include path.
 ## preferred-install
 Defaults to `auto` and can be any of `source`, `dist` or `auto`. This option
 allows you to set the install method Composer will prefer to use.
 ## store-auths
 What to do after prompting for authentication, one of: `true` (always store),
 `false` (do not store) and `"prompt"` (ask every time), defaults to `"prompt"`.
 ## github-protocols
 Defaults to `["git", "https", "ssh"]`. A list of protocols to use when cloning
 from github.com, in priority order. You can reconfigure it to for example
 prioritize the https protocol if you are behind a proxy or have somehow bad
 performances with the git protocol.
 ## github-oauth
 A list of domain names and oauth keys. For example using `{"github.com":
 "oauthtoken"}` as the value of this option will use `oauthtoken` to access
 private repositories on github and to circumvent the low IP-based rate limiting
 of their API. [Read
 more](articles/troubleshooting.md#api-rate-limit-and-oauth-tokens) on how to get
 an OAuth token for GitHub.
 ## http-basic
 A list of domain names and username/passwords to authenticate against them. For
 example using `{"example.org": {"username": "alice", "password": "foo"}` as the
 value of this option will let Composer authenticate against example.org.
 ## platform
 Lets you fake platform packages (PHP and extensions) so that you can emulate a
 production env or define your target platform in the config. Example: `{"php":
 "5.4", "ext-something": "4.0"}`.
 ## vendor-dir
 Defaults to `vendor`. You can install dependencies into a different directory if
 you want to. `$HOME` and `~` will be replaced by your home directory's path in
 vendor-dir and all `*-dir` options below.
 ## bin-dir
 Defaults to `vendor/bin`. If a project includes binaries, they will be symlinked
 into this directory.
 ## cache-dir
 Defaults `C:\Users\<user>\AppData\Local\Composer` on Windows,
 `$XDG_CACHE_HOME/composer` on unix systems that follow the XDG Base Directory
 Specifications, and `$home/cache` on other unix systems. Stores all the caches
 used by Composer. See also [COMPOSER_HOME](03-cli.md#composer-home).
 ## cache-files-dir
 Defaults to `$cache-dir/files`. Stores the zip archives of packages.
 ## cache-repo-dir
 Defaults to `$cache-dir/repo`. Stores repository metadata for the `composer`
 type and the VCS repos of type `svn`, `github` and `bitbucket`.
 ## cache-vcs-dir
 Defaults to `$cache-dir/vcs`. Stores VCS clones for loading VCS repository
 metadata for the `git`/`hg` types and to speed up installs.
 ## cache-files-ttl
 Defaults to `15552000` (6 months). Composer caches all dist (zip, tar, ..)
 packages that it downloads. Those are purged after six months of being unused by
 default. This option allows you to tweak this duration (in seconds) or disable
 it completely by setting it to 0.
 ## cache-files-maxsize
 Defaults to `300MiB`. Composer caches all dist (zip, tar, ..) packages that it
 downloads. When the garbage collection is periodically ran, this is the maximum
 size the cache will be able to use. Older (less used) files will be removed
 first until the cache fits.
 ## prepend-autoloader
 Defaults to `true`. If false, the Composer autoloader will not be prepended to
 existing autoloaders. This is sometimes required to fix interoperability issues
 with other autoloaders.
 ## autoloader-suffix
 Defaults to `null`. String to be used as a suffix for the generated Composer
 autoloader. When null a random one will be generated.
 ## optimize-autoloader
 Defaults to `false`. Always optimize when dumping the autoloader.
 ## classmap-authoritative
 Defaults to `false`. If `true`, the Composer autoloader will not scan the
 filesystem for classes that are not found in the class map. Implies
 'optimize-autoloader'.
 ## github-domains
 Defaults to `["github.com"]`. A list of domains to use in github mode. This is
 used for GitHub Enterprise setups.
 ## github-expose-hostname
 Defaults to `true`. If set to `false`, the OAuth tokens created to access the
 github API will have a date instead of the machine hostname.
 ## notify-on-install
 Defaults to `true`. Composer allows repositories to define a notification URL,
 so that they get notified whenever a package from that repository is installed.
 This option allows you to disable that behaviour.
 ## discard-changes
 Defaults to `false` and can be any of `true`, `false` or `"stash"`. This option
 allows you to set the default style of handling dirty updates when in
 non-interactive mode. `true` will always discard changes in vendors, while
 `"stash"` will try to stash and reapply. Use this for CI servers or deploy
 scripts if you tend to have modified vendors.
 ## archive-format
 Defaults to `tar`. Composer allows you to add a default archive format when the
 workflow needs to create a dedicated archiving format.
 ## archive-dir
 Defaults to `.`. Composer allows you to add a default archive directory when the
 workflow needs to create a dedicated archiving format. Or for easier development
 between modules.
 Example:
 ```json
 {
    "config": {
        "bin-dir": "bin"
    }
 }
 ```
 > **Note:** Authentication-related config options like `http-basic` and
 > `github-oauth` can also be specified inside a `auth.json` file that goes
 > besides your `composer.json`. That way you can gitignore it and every
 > developer can place their own credentials in there.
 &larr; [Repositories](05-repositories.md)  |  [Community](07-community.md) &rarr;
--- a/doc/07-community.md
+++ b/doc/07-community.md
@ -1,12 +1,14 @@
 # Community
-There are many people using composer already, and quite a few of them are
+There are many people using Composer already, and quite a few of them are
 contributing.
 ## Contributing
-If you would like to contribute to composer, please read the
+If you would like to contribute to Composer, please read the
-[README](https://github.com/composer/composer).
+[README](https://github.com/composer/composer) and 
 [CONTRIBUTING](https://github.com//composer/composer/blob/master/CONTRIBUTING.md)
 documents.
 The most important guidelines are described as follows:
@ -17,18 +19,18 @@ The most important guidelines are described as follows:
 > Fork the project, create a feature branch, and send us a pull request.
 >
 > To ensure a consistent code base, you should make sure the code follows
-> the [Coding Standards](http://symfony.com/doc/2.0/contributing/code/standards.html)
+> the [Coding Standards](https://symfony.com/doc/2.0/contributing/code/standards.html)
 > which we borrowed from Symfony.
 ## IRC / mailing list
-Mailing lists for [user support](http://groups.google.com/group/composer-users) and
+Mailing lists for [user support](https://groups.google.com/group/composer-users) and
-[development](http://groups.google.com/group/composer-dev).
+[development](https://groups.google.com/group/composer-dev).
 IRC channels are on irc.freenode.org: [#composer](irc://irc.freenode.org/composer)
 for users and [#composer-dev](irc://irc.freenode.org/composer-dev) for development.
 Stack Overflow has a growing collection of
-[Composer related questions](http://stackoverflow.com/questions/tagged/composer-php).
+[Composer related questions](https://stackoverflow.com/questions/tagged/composer-php).
-&larr; [Repositories](05-repositories.md)
+&larr; [Config](06-config.md)
--- a/doc/articles/aliases.md
+++ b/doc/articles/aliases.md
@ -38,8 +38,8 @@ specifying a `branch-alias` field under `extra` in `composer.json`:
 }
 ```
-If you alias a non-comparible version (such as dev-develop) `dev-` must prefix the
+If you alias a non-comparable version (such as dev-develop) `dev-` must prefix the
-branch name. You may also alias a comparible version (i.e. start with numbers,
+branch name. You may also alias a comparable version (i.e. start with numbers,
 and end with `.x-dev`), but only as a more specific version.
 For example, 1.x-dev could be aliased as 1.2.x-dev.
--- a/doc/articles/custom-installers.md
+++ b/doc/articles/custom-installers.md
@ -51,7 +51,7 @@ An example composer.json of such a template package would be:
 ## Creating an Installer
 A Custom Installer is defined as a class that implements the
-[`Composer\Installer\InstallerInterface`][3] and is usually distributed in a
+[`Composer\Installer\InstallerInterface`][4] and is usually distributed in a
 Composer Plugin.
 A basic Installer Plugin would thus compose of three files:
--- a/doc/articles/handling-private-packages-with-satis.md
+++ b/doc/articles/handling-private-packages-with-satis.md
@ -6,16 +6,22 @@
 # Toran Proxy
-[Toran Proxy](https://toranproxy.com/) is a commercial alternative to Satis offering professional support as well as a web UI to manage everything and a better integration with Composer.
+[Toran Proxy](https://toranproxy.com/) is a commercial alternative to Satis
 offering professional support as well as a web UI to manage everything and a
 better integration with Composer. It also provides proxying/mirroring for git
 repos and package zip files which makes installs faster and independent from
 third party systems.
-Toran's revenue is also used to pay for Composer and Packagist development and hosting so using it is a good way to support open source financially. You can find more information about how to set it up and use it on the [Toran Proxy](https://toranproxy.com/) website.
+Toran's revenue is also used to pay for Composer and Packagist development and
 hosting so using it is a good way to support open source financially. You can
 find more information about how to set it up and use it on the [Toran Proxy](https://toranproxy.com/) website.
 # Satis
 Satis on the other hand is open source but only a static `composer`
 repository generator. It is a bit like an ultra-lightweight, static file-based
 version of packagist and can be used to host the metadata of your company's
-private packages, or your own. You can get it from [GitHub](http://github.com/composer/satis)
+private packages, or your own. You can get it from [GitHub](https://github.com/composer/satis)
 or install via CLI:
 `php composer.phar create-project composer/satis --stability=dev --keep-vcs`.
@ -38,9 +44,9 @@ The default file Satis looks for is `satis.json` in the root of the repository.
    "name": "My Repository",
    "homepage": "http://packages.example.org",
    "repositories": [
-        { "type": "vcs", "url": "http://github.com/mycompany/privaterepo" },
+        { "type": "vcs", "url": "https://github.com/mycompany/privaterepo" },
        { "type": "vcs", "url": "http://svn.example.org/private/repo" },
-        { "type": "vcs", "url": "http://github.com/mycompany/privaterepo2" }
+        { "type": "vcs", "url": "https://github.com/mycompany/privaterepo2" }
    ],
    "require-all": true
 }
@ -54,9 +60,9 @@ constraint if you want really specific versions.
 ```json
 {
    "repositories": [
-        { "type": "vcs", "url": "http://github.com/mycompany/privaterepo" },
+        { "type": "vcs", "url": "https://github.com/mycompany/privaterepo" },
        { "type": "vcs", "url": "http://svn.example.org/private/repo" },
-        { "type": "vcs", "url": "http://github.com/mycompany/privaterepo2" }
+        { "type": "vcs", "url": "https://github.com/mycompany/privaterepo2" }
    ],
    "require": {
        "company/package": "*",
@ -129,7 +135,7 @@ Example using a custom repository using SSH (requires the SSH2 PECL extension):
 }
 ```
-> **Tip:** See [ssh2 context options](http://www.php.net/manual/en/wrappers.ssh2.php#refsect1-wrappers.ssh2-options) for more information.
+> **Tip:** See [ssh2 context options](https://www.php.net/manual/en/wrappers.ssh2.php#refsect1-wrappers.ssh2-options) for more information.
 Example using HTTP over SSL using a client certificate:
@ -149,7 +155,45 @@ Example using HTTP over SSL using a client certificate:
 }
 ```
-> **Tip:** See [ssl context options](http://www.php.net/manual/en/context.ssl.php) for more information.
+> **Tip:** See [ssl context options](https://www.php.net/manual/en/context.ssl.php) for more information.
 Example using a custom HTTP Header field for token authentication:
 ```json
 {
    "repositories": [
        {
            "type": "composer",
            "url": "https://example.org",
            "options":  {
                "http": {
                    "header": [
                        "API-TOKEN: YOUR-API-TOKEN"
                    ]
                }
            }
        }
    ]
 }
 ```
 ### Authentication
 When your private repositories are password protected, you can store the authentication details permanently.
 The first time Composer needs to authenticate against some domain it will prompt you for a username/password
 and then you will be asked whether you want to store it.
 The storage can be done either globally in the `COMPOSER_HOME/auth.json` file (`COMPOSER_HOME` defaults to
 `~/.composer` or `%APPDATA%/Composer` on Windows) or also in the project directory directly sitting besides your
 composer.json.
 You can also configure these by hand using the config command if you need to configure a production machine
 to be able to run non-interactive installs. For example to enter credentials for example.org one could type:
    composer config http-basic.example.org username password
 That will store it in the current directory's auth.json, but if you want it available globally you can use the
 `--global` (`-g`) flag.
 ### Downloads
@ -188,8 +232,8 @@ Once enabled, all downloads (include those from GitHub and BitBucket) will be re
 Prefixing the URL with another host is especially helpful if the downloads end up in a private Amazon S3
 bucket or on a CDN host. A CDN would drastically improve download times and therefore package installation.
-Example: A `prefix-url` of `http://my-bucket.s3.amazonaws.com` (and `directory` set to `dist`) creates download URLs
+Example: A `prefix-url` of `https://my-bucket.s3.amazonaws.com` (and `directory` set to `dist`) creates download URLs
-which look like the following: `http://my-bucket.s3.amazonaws.com/dist/vendor-package-version-ref.zip`.
+which look like the following: `https://my-bucket.s3.amazonaws.com/dist/vendor-package-version-ref.zip`.
 ### Resolving dependencies
--- a/doc/articles/http-basic-authentication.md
+++ b/doc/articles/http-basic-authentication.md
@ -17,7 +17,7 @@ of credentials inline with the repository specification such as:
    "repositories": [
        {
            "type": "composer",
-            "url": "http://extremely:secret@repo.example.org"
+            "url": "https://extremely:secret@repo.example.org"
        }
    ]
 }
@ -40,7 +40,7 @@ username/password pairs, for example:
 ```json
 {
-    "basic-auth": {
+    "http-basic": {
        "repo.example1.org": {
            "username": "my-username1",
            "password": "my-secret-password1"
@ -55,5 +55,5 @@ username/password pairs, for example:
 The main advantage of the auth.json file is that it can be gitignored so
 that every developer in your team can place their own credentials in there,
-which makes revokation of credentials much easier than if you all share the
+which makes revocation of credentials much easier than if you all share the
 same.
--- a/doc/articles/plugins.md
+++ b/doc/articles/plugins.md
@ -16,7 +16,7 @@ specific logic.
 ## Creating a Plugin
-A plugin is a regular composer package which ships its code as part of the
+A plugin is a regular Composer package which ships its code as part of the
 package and may also depend on further packages.
 ### Plugin Package
@ -24,23 +24,30 @@ package and may also depend on further packages.
 The package file is the same as any other package file but with the following
 requirements:
-1. the [type][1] attribute must be `composer-plugin`.
+1. The [type][1] attribute must be `composer-plugin`.
-2. the [extra][2] attribute must contain an element `class` defining the
+2. The [extra][2] attribute must contain an element `class` defining the
   class name of the plugin (including namespace). If a package contains
-   multiple plugins this can be array of class names.
+   multiple plugins, this can be array of class names.
 3. You must require the special package called `composer-plugin-api`
   to define which Plugin API versions your plugin is compatible with.
-Additionally you must require the special package called `composer-plugin-api`
+The required version of the `composer-plugin-api` follows the same [rules][7]
-to define which composer API versions your plugin is compatible with. The
+as a normal package's.
 current composer plugin API version is 1.0.0.
-For example
+The current composer plugin API version is 1.0.0.
 An example of a valid plugin `composer.json` file (with the autoloading 
 part omitted):
 ```json
 {
    "name": "my/plugin-package",
    "type": "composer-plugin",
    "require": {
-        "composer-plugin-api": "1.0.0"
+        "composer-plugin-api": "^1.0"
    },
    "extra": {
        "class": "My\\Plugin"
    }
 }
 ```
@ -82,15 +89,7 @@ Furthermore plugins may implement the
 event handlers automatically registered with the `EventDispatcher` when the
 plugin is loaded.
-The events available for plugins are:
+Plugin can subscribe to any of the available [script events](scripts.md#event-names).
 * **COMMAND**, is called at the beginning of all commands that load plugins.
  It provides you with access to the input and output objects of the program.
 * **PRE_FILE_DOWNLOAD**, is triggered before files are downloaded and allows
  you to manipulate the `RemoteFilesystem` object prior to downloading files
  based on the URL to be downloaded.
 > A plugin can also subscribe to [script events][7].
 Example:
@ -148,7 +147,7 @@ list of installed packages. Additionally all plugin packages installed in the
 local project plugins are loaded.
 > You may pass the `--no-plugins` option to composer commands to disable all
-> installed commands. This may be particularly helpful if any of the plugins
+> installed plugins. This may be particularly helpful if any of the plugins
 > causes errors and you wish to update or uninstall it.
 [1]: ../04-schema.md#type
@ -157,4 +156,4 @@ local project plugins are loaded.
 [4]: https://github.com/composer/composer/blob/master/src/Composer/Composer.php
 [5]: https://github.com/composer/composer/blob/master/src/Composer/IO/IOInterface.php
 [6]: https://github.com/composer/composer/blob/master/src/Composer/EventDispatcher/EventSubscriberInterface.php
-[7]: ./scripts.md#event-names
+[7]: ../01-basic-usage.md#package-versions
--- a/doc/articles/scripts.md
+++ b/doc/articles/scripts.md
@ -20,20 +20,16 @@ the Composer execution process.
 Composer fires the following named events during its execution process:
 ### Command Events
 - **pre-install-cmd**: occurs before the `install` command is executed.
 - **post-install-cmd**: occurs after the `install` command is executed.
 - **pre-update-cmd**: occurs before the `update` command is executed.
 - **post-update-cmd**: occurs after the `update` command is executed.
 - **pre-status-cmd**: occurs before the `status` command is executed.
 - **post-status-cmd**: occurs after the `status` command is executed.
- **pre-dependencies-solving**: occurs before the dependencies are resolved.
+- **pre-archive-cmd**: occurs before the `archive` command is executed.
- **post-dependencies-solving**: occurs after the dependencies are resolved.
+- **post-archive-cmd**: occurs after the `archive` command is executed.
 - **pre-package-install**: occurs before a package is installed.
 - **post-package-install**: occurs after a package is installed.
 - **pre-package-update**: occurs before a package is updated.
 - **post-package-update**: occurs after a package is updated.
 - **pre-package-uninstall**: occurs before a package has been uninstalled.
 - **post-package-uninstall**: occurs after a package has been uninstalled.
 - **pre-autoload-dump**: occurs before the autoloader is dumped, either
  during `install`/`update`, or via the `dump-autoload` command.
 - **post-autoload-dump**: occurs after the autoloader is dumped, either
@ -42,8 +38,28 @@ Composer fires the following named events during its execution process:
  installed, during the `create-project` command.
 - **post-create-project-cmd**: occurs after the `create-project` command is
  executed.
- **pre-archive-cmd**: occurs before the `archive` command is executed.
+
- **post-archive-cmd**: occurs after the `archive` command is executed.
+### Installer Events
 - **pre-dependencies-solving**: occurs before the dependencies are resolved.
 - **post-dependencies-solving**: occurs after the dependencies are resolved.
 ### Package Events
 - **pre-package-install**: occurs before a package is installed.
 - **post-package-install**: occurs after a package is installed.
 - **pre-package-update**: occurs before a package is updated.
 - **post-package-update**: occurs after a package is updated.
 - **pre-package-uninstall**: occurs before a package has been uninstalled.
 - **post-package-uninstall**: occurs after a package has been uninstalled.
 ### Plugin Events
 - **command**: occurs before any Composer Command is executed on the CLI. It
  provides you with access to the input and output objects of the program.
 - **pre-file-download**: occurs before files are downloaded and allows
  you to manipulate the `RemoteFilesystem` object prior to downloading files
  based on the URL to be downloaded.
 > **Note:** Composer makes no assumptions about the state of your dependencies
 > prior to `install` or `update`. Therefore, you should not specify scripts
@ -96,6 +112,7 @@ that might be used to execute the PHP callbacks:
 namespace MyVendor;
 use Composer\Script\Event;
 use Composer\Installer\PackageEvent;
 class MyClass
 {
@ -105,7 +122,7 @@ class MyClass
        // do stuff
    }
-    public static function postPackageInstall(Event $event)
+    public static function postPackageInstall(PackageEvent $event)
    {
        $installedPackage = $event->getOperation()->getPackage();
        // do stuff
@ -118,14 +135,21 @@ class MyClass
 }
 ```
-When an event is fired, Composer's internal event handler receives a
+When an event is fired, your PHP callback receives as first argument an
-`Composer\Script\Event` object, which is passed as the first argument to your
+`Composer\EventDispatcher\Event` object. This object has a `getName()` method
-PHP callback. This `Event` object has getters for other contextual objects:
+that lets you retrieve event name.
- `getComposer()`: returns the current instance of `Composer\Composer`
+Depending on the script types (see list above) you will get various event
- `getName()`: returns the name of the event being fired as a string
+subclasses containing various getters with relevant data and associated
- `getIO()`: returns the current input/output stream which implements
+objects:
-`Composer\IO\IOInterface` for writing to the console
+
 - Base class: [`Composer\EventDispatcher\Event`](https://getcomposer.org/apidoc/master/Composer/EventDispatcher/Event.html)
 - Command Events: [`Composer\Script\Event`](https://getcomposer.org/apidoc/master/Composer/Script/Event.html)
 - Installer Events: [`Composer\Installer\InstallerEvent`](https://getcomposer.org/apidoc/master/Composer/Installer/InstallerEvent.html)
 - Package Events: [`Composer\Installer\PackageEvent`](https://getcomposer.org/apidoc/master/Composer/Installer/PackageEvent.html)
 - Plugin Events:
  - command: [`Composer\Plugin\CommandEvent`](https://getcomposer.org/apidoc/master/Composer/Plugin/CommandEvent.html)
  - pre-file-download: [`Composer\Plugin\PreFileDownloadEvent`](https://getcomposer.org/apidoc/master/Composer/Plugin/PreFileDownloadEvent.html)
 ## Running scripts manually
--- a/doc/articles/troubleshooting.md
+++ b/doc/articles/troubleshooting.md
@ -48,7 +48,7 @@ This is a list of common pitfalls on using Composer, and how to avoid them.
 1. Check the ["Package not found"](#package-not-found) item above.
 2. If the package tested is a dependency of one of its dependencies (cyclic
-   dependency), the problem might be that composer is not able to detect the version
+   dependency), the problem might be that Composer is not able to detect the version
   of the package properly. If it is a git clone it is generally alright and Composer
   will detect the version of the current branch, but travis does shallow clones so
   that process can fail when testing pull requests and feature branches in general.
@ -58,11 +58,22 @@ This is a list of common pitfalls on using Composer, and how to avoid them.
   Use: `before_script: COMPOSER_ROOT_VERSION=dev-master composer install` to export
   the variable for the call to composer.
 ## Package not found in a Jenkins-build
 1. Check the ["Package not found"](#package-not-found) item above.
 2. Reason for failing is similar to the problem which can occur on travis-ci.org: The 
   git-clone / checkout within Jenkins leaves the branch in a "detached HEAD"-state. As 
   a result, Composer is not able to identify the version of the current checked out branch 
   and may not be able to resolve a cyclic dependency. To solve this problem, you can use 
   the "Additional Behaviours" -> "Check out to specific local branch" in your Git-settings 
   for your Jenkins-job, where your "local branch" shall be the same branch as you are 
   checking out. Using this, the checkout will not be in detached state any more and cyclic 
   dependency is recognized correctly.
 ## Need to override a package version
-Let say your project depends on package A which in turn depends on a specific
+Let's say your project depends on package A, which in turn depends on a specific
-version of package B (say 0.1) and you need a different version of that
+version of package B (say 0.1). But you need a different version of said package B (say 0.11).
 package - version 0.11.
 You can fix this by aliasing version 0.11 to 0.1:
@ -87,7 +98,7 @@ If composer shows memory errors on some commands:
 The PHP `memory_limit` should be increased.
-> **Note:** Composer internally increases the `memory_limit` to `512M`.
+> **Note:** Composer internally increases the `memory_limit` to `1G`.
 > If you have memory issues when using composer, please consider [creating
 > an issue ticket](https://github.com/composer/composer/issues) so we can look into it.
@ -101,7 +112,7 @@ Try increasing the limit in your `php.ini` file (ex. `/etc/php5/cli/php.ini` for
 Debian-like systems):
 ```ini
-; Use -1 for unlimited or define an explicit value like 512M
+; Use -1 for unlimited or define an explicit value like 2G
 memory_limit = -1
 ```
--- a/doc/dev/DefaultPolicy.md
+++ b/doc/dev/DefaultPolicy.md
@ -12,6 +12,13 @@ resulting order in which the solver will try to install them.
 The rules are to be applied in the order of these descriptions.
 ### Repository priorities
 Packages Repo1.Av1, Repo2.Av1
 * priority(Repo1) >= priority(Repo2) => (Repo1.Av1, Repo2.Av1)
 * priority(Repo1) <  priority(Repo2) => (Repo2.Av1, Repo1.Av1)
 ### Package versions
 Packages: Av1, Av2, Av3
@ -22,13 +29,6 @@ Request: install A
 * (Av3)
 ### Repository priorities
 Packages Repo1.Av1, Repo2.Av1
 * priority(Repo1) >= priority(Repo2) => (Repo1.Av1, Repo2.Av1)
 * priority(Repo1) <  priority(Repo2) => (Repo2.Av1, Repo1.Av1)
 ### Virtual Packages (provides)
 Packages Av1, Bv1
--- a/doc/faqs/should-i-commit-the-dependencies-in-my-vendor-directory.md
+++ b/doc/faqs/should-i-commit-the-dependencies-in-my-vendor-directory.md
@ -27,6 +27,6 @@ If you really feel like you must do this, you have a few options:
   in ZSH or `find vendor/ -type d -name ".git" -exec rm -rf {} \;` in Bash.
   but this means you will have to delete those dependencies from disk before
   running composer update.
-4. Add a .gitignore rule (`vendor/.git`) to ignore all the vendor `.git` folders.
+4. Add a .gitignore rule (`/vendor/**/.git`) to ignore all the vendor `.git` folders.
   This approach does not require that you delete dependencies from disk prior to
   running a composer update.
--- a/doc/faqs/why-are-unbound-version-constraints-a-bad-idea.md
+++ b/doc/faqs/why-are-unbound-version-constraints-a-bad-idea.md
@ -14,7 +14,7 @@ compatible with the new major version of your dependency.
 For example instead of using `>=3.4` you should use `~3.4` which allows all
 versions up to `3.999` but does not include `4.0` and above. The `~` operator
-works very well with libraries follow [semantic versioning](http://semver.org).
+works very well with libraries following [semantic versioning](http://semver.org).
 **Note:** As a package maintainer, you can make the life of your users easier
 by providing an [alias version](../articles/aliases.md) for your development
--- a/res/composer-schema.json
+++ b/res/composer-schema.json
@ -35,7 +35,7 @@
        },
        "version": {
            "type": "string",
-            "description": "Package version, see http://getcomposer.org/doc/04-schema.md#version for more info on valid schemes."
+            "description": "Package version, see https://getcomposer.org/doc/04-schema.md#version for more info on valid schemes."
        },
        "time": {
            "type": "string",
@ -145,6 +145,11 @@
                    "type": ["string", "boolean"],
                    "description": "What to do after prompting for authentication, one of: true (store), false (do not store) or \"prompt\" (ask every time), defaults to prompt."
                },
                "platform": {
                    "type": "object",
                    "description": "This is a hash of package name (keys) and version (values) that will be used to mock the platform packages on this machine.",
                    "additionalProperties": true
                },
                "vendor-dir": {
                    "type": "string",
                    "description": "The location where all packages are installed, defaults to \"vendor\"."
@ -211,6 +216,14 @@
                "github-expose-hostname": {
                    "type": "boolean",
                    "description": "Defaults to true. If set to false, the OAuth tokens created to access the github API will have a date instead of the machine hostname."
                },
                "archive-format": {
                    "type": "string",
                    "description": "The default archiving format when not provided on cli, defaults to \"tar\"."
                },
                "archive-dir": {
                    "type": "string",
                    "description": "The default archive path when not provided on cli, defaults to \".\"."
                }
            }
        },
@ -284,11 +297,12 @@
        },
        "minimum-stability": {
            "type": ["string"],
-            "description": "The minimum stability the packages must have to be install-able. Possible values are: dev, alpha, beta, RC, stable."
+            "description": "The minimum stability the packages must have to be install-able. Possible values are: dev, alpha, beta, RC, stable.",
            "pattern": "^dev|alpha|beta|rc|RC|stable$"
        },
        "prefer-stable": {
            "type": ["boolean"],
-            "description": "If set to true, stable packages will be prefered to dev packages when possible, even if the minimum-stability allows unstable packages."
+            "description": "If set to true, stable packages will be preferred to dev packages when possible, even if the minimum-stability allows unstable packages."
        },
        "bin": {
            "type": ["array"],
@ -384,17 +398,17 @@
                },
                "issues": {
                    "type": "string",
-                    "description": "URL to the Issue Tracker.",
+                    "description": "URL to the issue tracker.",
                    "format": "uri"
                },
                "forum": {
                    "type": "string",
-                    "description": "URL to the Forum.",
+                    "description": "URL to the forum.",
                    "format": "uri"
                },
                "wiki": {
                    "type": "string",
-                    "description": "URL to the Wiki.",
+                    "description": "URL to the wiki.",
                    "format": "uri"
                },
                "irc": {
@ -406,8 +420,20 @@
                    "type": "string",
                    "description": "URL to browse or download the sources.",
                    "format": "uri"
                },
                "docs": {
                    "type": "string",
                    "description": "URL to the documentation.",
                    "format": "uri"
                }
            }
        },
        "non-feature-branches": {
            "type": ["array"],
            "description": "A set of string or regex patterns for non-numeric branch names that will not be handled as feature branches.",
            "items": {
                "type": "string"
            }
        }
    }
 }
--- a/res/spdx-identifier.json
+++ b/res/spdx-identifier.json
@ -1,59 +0,0 @@
 [
    "Glide", "Abstyles", "AFL-1.1", "AFL-1.2", "AFL-2.0", "AFL-2.1", "AFL-3.0",
    "AMPAS", "APL-1.0", "Adobe-Glyph", "APAFML", "Adobe-2006", "AGPL-1.0",
    "Afmparse", "Aladdin", "ADSL", "AMDPLPA", "ANTLR-PD", "Apache-1.0",
    "Apache-1.1", "Apache-2.0", "AML", "APSL-1.0", "APSL-1.1", "APSL-1.2",
    "APSL-2.0", "Artistic-1.0", "Artistic-1.0-Perl", "Artistic-1.0-cl8",
    "Artistic-2.0", "AAL", "Bahyph", "Barr", "Beerware", "BitTorrent-1.0",
    "BitTorrent-1.1", "BSL-1.0", "Borceux", "BSD-2-Clause",
    "BSD-2-Clause-FreeBSD", "BSD-2-Clause-NetBSD", "BSD-3-Clause",
    "BSD-3-Clause-Clear", "BSD-4-Clause", "BSD-Protection",
    "BSD-3-Clause-Attribution", "BSD-4-Clause-UC", "bzip2-1.0.5", "bzip2-1.0.6",
    "Caldera", "CECILL-1.0", "CECILL-1.1", "CECILL-2.0", "CECILL-B", "CECILL-C",
    "ClArtistic", "MIT-CMU", "CNRI-Python", "CNRI-Python-GPL-Compatible",
    "CPOL-1.02", "CDDL-1.0", "CDDL-1.1", "CPAL-1.0", "CPL-1.0", "CATOSL-1.1",
    "Condor-1.1", "CC-BY-1.0", "CC-BY-2.0", "CC-BY-2.5", "CC-BY-3.0",
    "CC-BY-4.0", "CC-BY-ND-1.0", "CC-BY-ND-2.0", "CC-BY-ND-2.5", "CC-BY-ND-3.0",
    "CC-BY-ND-4.0", "CC-BY-NC-1.0", "CC-BY-NC-2.0", "CC-BY-NC-2.5",
    "CC-BY-NC-3.0", "CC-BY-NC-4.0", "CC-BY-NC-ND-1.0", "CC-BY-NC-ND-2.0",
    "CC-BY-NC-ND-2.5", "CC-BY-NC-ND-3.0", "CC-BY-NC-ND-4.0", "CC-BY-NC-SA-1.0",
    "CC-BY-NC-SA-2.0", "CC-BY-NC-SA-2.5", "CC-BY-NC-SA-3.0", "CC-BY-NC-SA-4.0",
    "CC-BY-SA-1.0", "CC-BY-SA-2.0", "CC-BY-SA-2.5", "CC-BY-SA-3.0",
    "CC-BY-SA-4.0", "CC0-1.0", "Crossword", "CUA-OPL-1.0", "Cube", "D-FSL-1.0",
    "diffmark", "WTFPL", "DOC", "Dotseqn", "DSDP", "dvipdfm", "EPL-1.0",
    "eCos-2.0", "ECL-1.0", "ECL-2.0", "eGenix", "EFL-1.0", "EFL-2.0",
    "MIT-advertising", "MIT-enna", "Entessa", "ErlPL-1.1", "EUDatagrid",
    "EUPL-1.0", "EUPL-1.1", "Eurosym", "Fair", "MIT-feh", "Frameworx-1.0",
    "FTL", "FSFUL", "FSFULLR", "Giftware", "GL2PS", "Glulxe", "AGPL-3.0",
    "GFDL-1.1", "GFDL-1.2", "GFDL-1.3", "GPL-1.0", "GPL-1.0+", "GPL-2.0",
    "GPL-2.0+", "GPL-2.0-with-autoconf-exception",
    "GPL-2.0-with-bison-exception", "GPL-2.0-with-classpath-exception",
    "GPL-2.0-with-font-exception", "GPL-2.0-with-GCC-exception", "GPL-3.0",
    "GPL-3.0+", "GPL-3.0-with-autoconf-exception", "GPL-3.0-with-GCC-exception",
    "LGPL-2.1", "LGPL-2.1+", "LGPL-3.0", "LGPL-3.0+", "LGPL-2.0", "LGPL-2.0+",
    "gnuplot", "gSOAP-1.3b", "HaskellReport", "HPND", "IBM-pibs", "IPL-1.0",
    "ImageMagick", "iMatix", "Imlib2", "IJG", "Intel-ACPI", "Intel", "IPA",
    "ISC", "JasPer-2.0", "JSON", "LPPL-1.3a", "LPPL-1.0", "LPPL-1.1",
    "LPPL-1.2", "LPPL-1.3c", "Latex2e", "BSD-3-Clause-LBNL", "Leptonica",
    "Libpng", "libtiff", "LPL-1.02", "LPL-1.0", "MakeIndex", "MTLL", "MS-PL",
    "MS-RL", "MirOS", "MITNFA", "MIT", "Motosoto", "MPL-1.0", "MPL-1.1",
    "MPL-2.0", "MPL-2.0-no-copyleft-exception", "mpich2", "Multics", "Mup",
    "NASA-1.3", "Naumen", "NBPL-1.0", "NetCDF", "NGPL", "NOSL", "NPL-1.0",
    "NPL-1.1", "Newsletr", "NLPL", "Nokia", "NPOSL-3.0", "Noweb", "NRL", "NTP",
    "Nunit", "OCLC-2.0", "ODbL-1.0", "PDDL-1.0", "OGTSL", "OLDAP-2.2.2",
    "OLDAP-1.1", "OLDAP-1.2", "OLDAP-1.3", "OLDAP-1.4", "OLDAP-2.0",
    "OLDAP-2.0.1", "OLDAP-2.1", "OLDAP-2.2", "OLDAP-2.2.1", "OLDAP-2.3",
    "OLDAP-2.4", "OLDAP-2.5", "OLDAP-2.6", "OLDAP-2.7", "OML", "OPL-1.0",
    "OSL-1.0", "OSL-1.1", "OSL-2.0", "OSL-2.1", "OSL-3.0", "OLDAP-2.8",
    "OpenSSL", "PHP-3.0", "PHP-3.01", "Plexus", "PostgreSQL", "psfrag",
    "psutils", "Python-2.0", "QPL-1.0", "Qhull", "Rdisc", "RPSL-1.0", "RPL-1.1",
    "RPL-1.5", "RHeCos-1.1", "RSCPL", "Ruby", "SAX-PD", "Saxpath", "SCEA",
    "SWL", "SGI-B-1.0", "SGI-B-1.1", "SGI-B-2.0", "OFL-1.0", "OFL-1.1",
    "SimPL-2.0", "Sleepycat", "SNIA", "SMLNJ", "StandardML-NJ",
    "SugarCRM-1.1.3", "SISSL", "SISSL-1.2", "SPL-1.0", "Watcom-1.0", "TCL",
    "Unlicense", "TMate", "TORQUE-1.1", "TOSL", "Unicode-TOU", "NCSA", "Vim",
    "VOSTROM", "VSL-1.0", "W3C", "Wsuipa", "WXwindows", "Xnet", "X11", "Xerox",
    "XFree86-1.1", "xinetd", "xpp", "XSkat", "YPL-1.0", "YPL-1.1", "Zed",
    "Zend-2.0", "Zimbra-1.3", "Zlib", "zlib-acknowledgement", "ZPL-1.1",
    "ZPL-2.0", "ZPL-2.1"
 ]
--- a/res/spdx-licenses.json
+++ b/res/spdx-licenses.json
--- a/src/Composer/Autoload/AutoloadGenerator.php
+++ b/src/Composer/Autoload/AutoloadGenerator.php
@ -183,7 +183,7 @@ EOF;
                            continue;
                        }
                        $whitelist = sprintf(
-                            '{%s/%s.+(?<!(?<!/)Test\.php)$}',
+                            '{%s/%s.+$}',
                            preg_quote($dir),
                            ($psrType === 'psr-0' && strpos($namespace, '_') === false) ? preg_quote(strtr($namespace, '\\', '/')) : ''
                        );
@ -214,7 +214,16 @@ EOF;
        $classmapFile .= ");\n";
        if (!$suffix) {
-            $suffix = $config->get('autoloader-suffix') ?: md5(uniqid('', true));
+            if (!$config->get('autoloader-suffix') && is_readable($vendorPath.'/autoload.php')) {
                $content = file_get_contents($vendorPath.'/autoload.php');
                if (preg_match('{ComposerAutoloaderInit([^:\s]+)::}', $content, $match)) {
                    $suffix = $match[1];
                }
            }
            if (!$suffix) {
                $suffix = $config->get('autoloader-suffix') ?: md5(uniqid('', true));
            }
        }
        file_put_contents($targetDir.'/autoload_namespaces.php', $namespacesFile);
@ -383,7 +392,7 @@ EOF;
        }
        if (!$filesCode) {
-            return FALSE;
+            return false;
        }
        return <<<EOF
--- a/src/Composer/Autoload/ClassLoader.php
+++ b/src/Composer/Autoload/ClassLoader.php
@ -351,7 +351,7 @@ class ClassLoader
            foreach ($this->prefixLengthsPsr4[$first] as $prefix => $length) {
                if (0 === strpos($class, $prefix)) {
                    foreach ($this->prefixDirsPsr4[$prefix] as $dir) {
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (is_file($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
                            return $file;
                        }
                    }
@ -361,7 +361,7 @@ class ClassLoader
        // PSR-4 fallback dirs
        foreach ($this->fallbackDirsPsr4 as $dir) {
-            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+            if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
                return $file;
            }
        }
@ -380,7 +380,7 @@ class ClassLoader
            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
                if (0 === strpos($class, $prefix)) {
                    foreach ($dirs as $dir) {
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                        if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
                            return $file;
                        }
                    }
@ -390,7 +390,7 @@ class ClassLoader
        // PSR-0 fallback dirs
        foreach ($this->fallbackDirsPsr0 as $dir) {
-            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+            if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
                return $file;
            }
        }
--- a/src/Composer/Autoload/ClassMapGenerator.php
+++ b/src/Composer/Autoload/ClassMapGenerator.php
@ -92,7 +92,7 @@ class ClassMapGenerator
                if (!isset($map[$class])) {
                    $map[$class] = $filePath;
                } elseif ($io && $map[$class] !== $filePath && !preg_match('{/(test|fixture|example)s?/}i', strtr($map[$class].' '.$filePath, '\\', '/'))) {
-                    $io->write(
+                    $io->writeError(
                        '<warning>Warning: Ambiguous class resolution, "'.$class.'"'.
                        ' was found in both "'.$map[$class].'" and "'.$filePath.'", the first will be used.</warning>'
                    );
@ -112,7 +112,10 @@ class ClassMapGenerator
     */
    private static function findClasses($path)
    {
-        $traits = version_compare(PHP_VERSION, '5.4', '<') ? '' : '|trait';
+        $extraTypes = PHP_VERSION_ID < 50400 ? '' : '|trait';
        if (defined('HHVM_VERSION') && version_compare(HHVM_VERSION, '3.3', '>=')) {
            $extraTypes .= '|enum';
        }
        try {
            $contents = @php_strip_whitespace($path);
@ -129,14 +132,14 @@ class ClassMapGenerator
        }
        // return early if there is no chance of matching anything in this file
-        if (!preg_match('{\b(?:class|interface'.$traits.')\s}i', $contents)) {
+        if (!preg_match('{\b(?:class|interface'.$extraTypes.')\s}i', $contents)) {
            return array();
        }
        // strip heredocs/nowdocs
        $contents = preg_replace('{<<<\s*(\'?)(\w+)\\1(?:\r\n|\n|\r)(?:.*?)(?:\r\n|\n|\r)\\2(?=\r\n|\n|\r|;)}s', 'null', $contents);
        // strip strings
-        $contents = preg_replace('{"[^"\\\\]*(\\\\.[^"\\\\]*)*"|\'[^\'\\\\]*(\\\\.[^\'\\\\]*)*\'}s', 'null', $contents);
+        $contents = preg_replace('{"[^"\\\\]*+(\\\\.[^"\\\\]*+)*+"|\'[^\'\\\\]*+(\\\\.[^\'\\\\]*+)*+\'}s', 'null', $contents);
        // strip leading non-php code if needed
        if (substr($contents, 0, 2) !== '<?') {
            $contents = preg_replace('{^.+?<\?}s', '<?', $contents, 1, $replacements);
@ -154,8 +157,8 @@ class ClassMapGenerator
        preg_match_all('{
            (?:
-                 \b(?<![\$:>])(?P<type>class|interface'.$traits.') \s+ (?P<name>[a-zA-Z_\x7f-\xff:][a-zA-Z0-9_\x7f-\xff:\-]*)
+                 \b(?<![\$:>])(?P<type>class|interface'.$extraTypes.') \s++ (?P<name>[a-zA-Z_\x7f-\xff:][a-zA-Z0-9_\x7f-\xff:\-]*+)
-               | \b(?<![\$:>])(?P<ns>namespace) (?P<nsname>\s+[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*(?:\s*\\\\\s*[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)*)? \s*[\{;]
+               | \b(?<![\$:>])(?P<ns>namespace) (?P<nsname>\s++[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\s*+\\\\\s*+[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+)? \s*+ [\{;]
            )
        }ix', $contents, $matches);
@ -170,6 +173,12 @@ class ClassMapGenerator
                if ($name[0] === ':') {
                    // This is an XHP class, https://github.com/facebook/xhp
                    $name = 'xhp'.substr(str_replace(array('-', ':'), array('_', '__'), $name), 1);
                } elseif ($matches['type'][$i] === 'enum') {
                    // In Hack, something like:
                    //   enum Foo: int { HERP = '123'; }
                    // The regex above captures the colon, which isn't part of
                    // the class name.
                    $name = rtrim($name, ':');
                }
                $classes[] = ltrim($namespace . $name, '\\');
            }
--- a/src/Composer/Cache.php
+++ b/src/Composer/Cache.php
@ -65,7 +65,7 @@ class Cache
        $file = preg_replace('{[^'.$this->whitelist.']}i', '-', $file);
        if ($this->enabled && file_exists($this->root . $file)) {
            if ($this->io->isDebug()) {
-                $this->io->write('Reading '.$this->root . $file.' from cache');
+                $this->io->writeError('Reading '.$this->root . $file.' from cache');
            }
            return file_get_contents($this->root . $file);
@ -80,7 +80,7 @@ class Cache
            $file = preg_replace('{[^'.$this->whitelist.']}i', '-', $file);
            if ($this->io->isDebug()) {
-                $this->io->write('Writing '.$this->root . $file.' into cache');
+                $this->io->writeError('Writing '.$this->root . $file.' into cache');
            }
            try {
@ -98,7 +98,7 @@ class Cache
                        @disk_free_space($this->root . dirname($file))
                    );
-                    $this->io->write($message);
+                    $this->io->writeError($message);
                    return false;
                }
@ -120,7 +120,7 @@ class Cache
            $this->filesystem->ensureDirectoryExists(dirname($this->root . $file));
            if ($this->io->isDebug()) {
-                $this->io->write('Writing '.$this->root . $file.' into cache');
+                $this->io->writeError('Writing '.$this->root . $file.' into cache');
            }
            return copy($source, $this->root . $file);
@ -136,10 +136,16 @@ class Cache
    {
        $file = preg_replace('{[^'.$this->whitelist.']}i', '-', $file);
        if ($this->enabled && file_exists($this->root . $file)) {
-            touch($this->root . $file);
+            try {
                touch($this->root . $file, filemtime($this->root . $file), time());
            } catch (\ErrorException $e) {
                // fallback in case the above failed due to incorrect ownership
                // see https://github.com/composer/composer/issues/4070
                touch($this->root . $file);
            }
            if ($this->io->isDebug()) {
-                $this->io->write('Reading '.$this->root . $file.' from cache');
+                $this->io->writeError('Reading '.$this->root . $file.' from cache');
            }
            return copy($this->root . $file, $target);
--- a/src/Composer/Command/AboutCommand.php
+++ b/src/Composer/Command/AboutCommand.php
@ -34,10 +34,10 @@ EOT
    protected function execute(InputInterface $input, OutputInterface $output)
    {
-        $output->writeln(<<<EOT
+        $this->getIO()->write(<<<EOT
 <info>Composer - Package Management for PHP</info>
 <comment>Composer is a dependency manager tracking local dependencies of your projects and libraries.
-See http://getcomposer.org/ for more information.</comment>
+See https://getcomposer.org/ for more information.</comment>
 EOT
        );
    }
--- a/src/Composer/Command/ArchiveCommand.php
+++ b/src/Composer/Command/ArchiveCommand.php
@ -14,12 +14,11 @@ namespace Composer\Command;
 use Composer\Factory;
 use Composer\IO\IOInterface;
-use Composer\DependencyResolver\Pool;
+use Composer\Config;
 use Composer\Repository\CompositeRepository;
 use Composer\Script\ScriptEvents;
 use Composer\Plugin\CommandEvent;
 use Composer\Plugin\PluginEvents;
 use Composer\Package\Version\VersionParser;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
@ -41,8 +40,8 @@ class ArchiveCommand extends Command
            ->setDefinition(array(
                new InputArgument('package', InputArgument::OPTIONAL, 'The package to archive instead of the current project'),
                new InputArgument('version', InputArgument::OPTIONAL, 'A version constraint to find the package to archive'),
-                new InputOption('format', 'f', InputOption::VALUE_REQUIRED, 'Format of the resulting archive: tar or zip', 'tar'),
+                new InputOption('format', 'f', InputOption::VALUE_OPTIONAL, 'Format of the resulting archive: tar or zip'),
-                new InputOption('dir', false, InputOption::VALUE_REQUIRED, 'Write the archive to this directory', '.'),
+                new InputOption('dir', false, InputOption::VALUE_OPTIONAL, 'Write the archive to this directory'),
            ))
            ->setHelp(<<<EOT
 The <info>archive</info> command creates an archive of the specified format
@ -58,6 +57,7 @@ EOT
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $config = Factory::createConfig();
        $composer = $this->getComposer(false);
        if ($composer) {
            $commandEvent = new CommandEvent(PluginEvents::COMMAND, 'archive', $input, $output);
@ -65,8 +65,16 @@ EOT
            $composer->getEventDispatcher()->dispatchScript(ScriptEvents::PRE_ARCHIVE_CMD);
        }
        if (null === $input->getOption('format')) {
            $input->setOption('format', $config->get('archive-format'));
        }
        if (null === $input->getOption('dir')) {
            $input->setOption('dir', $config->get('archive-dir'));
        }
        $returnCode = $this->archive(
            $this->getIO(),
            $config,
            $input->getArgument('package'),
            $input->getArgument('version'),
            $input->getOption('format'),
@ -80,9 +88,8 @@ EOT
        return $returnCode;
    }
-    protected function archive(IOInterface $io, $packageName = null, $version = null, $format = 'tar', $dest = '.')
+    protected function archive(IOInterface $io, Config $config, $packageName = null, $version = null, $format = 'tar', $dest = '.')
    {
        $config = Factory::createConfig();
        $factory = new Factory;
        $downloadManager = $factory->createDownloadManager($io, $config);
        $archiveManager = $factory->createArchiveManager($config, $downloadManager);
@ -97,7 +104,7 @@ EOT
            $package = $this->getComposer()->getPackage();
        }
-        $io->write('<info>Creating the archive.</info>');
+        $io->writeError('<info>Creating the archive into "'.$dest.'".</info>');
        $archiveManager->archive($package, $format, $dest);
        return 0;
@ -105,34 +112,29 @@ EOT
    protected function selectPackage(IOInterface $io, $packageName, $version = null)
    {
-        $io->write('<info>Searching for the specified package.</info>');
+        $io->writeError('<info>Searching for the specified package.</info>');
        if ($composer = $this->getComposer(false)) {
            $localRepo = $composer->getRepositoryManager()->getLocalRepository();
-            $repos = new CompositeRepository(array_merge(array($localRepo), $composer->getRepositoryManager()->getRepositories()));
+            $repo = new CompositeRepository(array_merge(array($localRepo), $composer->getRepositoryManager()->getRepositories()));
        } else {
            $defaultRepos = Factory::createDefaultRepositories($this->getIO());
-            $io->write('No composer.json found in the current directory, searching packages from ' . implode(', ', array_keys($defaultRepos)));
+            $io->writeError('No composer.json found in the current directory, searching packages from ' . implode(', ', array_keys($defaultRepos)));
-            $repos = new CompositeRepository($defaultRepos);
+            $repo = new CompositeRepository($defaultRepos);
        }
-        $pool = new Pool();
+        $packages = $repo->findPackages($packageName, $version);
        $pool->addRepository($repos);
        $parser = new VersionParser();
        $constraint = ($version) ? $parser->parseConstraints($version) : null;
        $packages = $pool->whatProvides($packageName, $constraint, true);
        if (count($packages) > 1) {
            $package = reset($packages);
-            $io->write('<info>Found multiple matches, selected '.$package->getPrettyString().'.</info>');
+            $io->writeError('<info>Found multiple matches, selected '.$package->getPrettyString().'.</info>');
-            $io->write('Alternatives were '.implode(', ', array_map(function ($p) { return $p->getPrettyString(); }, $packages)).'.');
+            $io->writeError('Alternatives were '.implode(', ', array_map(function ($p) { return $p->getPrettyString(); }, $packages)).'.');
-            $io->write('<comment>Please use a more specific constraint to pick a different package.</comment>');
+            $io->writeError('<comment>Please use a more specific constraint to pick a different package.</comment>');
        } elseif ($packages) {
            $package = reset($packages);
-            $io->write('<info>Found an exact match '.$package->getPrettyString().'.</info>');
+            $io->writeError('<info>Found an exact match '.$package->getPrettyString().'.</info>');
        } else {
-            $io->write('<error>Could not find a package matching '.$packageName.'.</error>');
+            $io->writeError('<error>Could not find a package matching '.$packageName.'.</error>');
            return false;
        }
--- a/src/Composer/Command/ClearCacheCommand.php
+++ b/src/Composer/Command/ClearCacheCommand.php
@ -51,21 +51,21 @@ EOT
        foreach ($cachePaths as $key => $cachePath) {
            $cachePath = realpath($cachePath);
            if (!$cachePath) {
-                $io->write("<info>Cache directory does not exist ($key): $cachePath</info>");
+                $io->writeError("<info>Cache directory does not exist ($key): $cachePath</info>");
-                return;
+                continue;
            }
            $cache = new Cache($io, $cachePath);
            if (!$cache->isEnabled()) {
-                $io->write("<info>Cache is not enabled ($key): $cachePath</info>");
+                $io->writeError("<info>Cache is not enabled ($key): $cachePath</info>");
-                return;
+                continue;
            }
-            $io->write("<info>Clearing cache ($key): $cachePath</info>");
+            $io->writeError("<info>Clearing cache ($key): $cachePath</info>");
            $cache->gc(0, 0);
        }
-        $io->write('<info>All caches cleared.</info>');
+        $io->writeError('<info>All caches cleared.</info>');
    }
 }
--- a/src/Composer/Command/ConfigCommand.php
+++ b/src/Composer/Command/ConfigCommand.php
@ -33,15 +33,25 @@ class ConfigCommand extends Command
    protected $config;
    /**
-     * @var Composer\Json\JsonFile
+     * @var JsonFile
     */
    protected $configFile;
    /**
-     * @var Composer\Config\JsonConfigSource
+     * @var JsonConfigSource
     */
    protected $configSource;
    /**
     * @var JsonFile
     */
    protected $authConfigFile;
    /**
     * @var JsonConfigSource
     */
    protected $authConfigSource;
    /**
     * {@inheritDoc}
     */
@ -65,6 +75,15 @@ class ConfigCommand extends Command
 This command allows you to edit some basic composer settings in either the
 local composer.json file or the global config.json file.
 To set a config setting:
    <comment>%command.full_name% bin-dir bin/</comment>
 To read a config setting:
    <comment>%command.full_name% bin-dir</comment>
    Outputs: <info>bin</info>
 To edit the global config.json file:
    <comment>%command.full_name% --global</comment>
@ -73,7 +92,15 @@ To add a repository:
    <comment>%command.full_name% repositories.foo vcs http://bar.com</comment>
-You can add a repository to the global config.json file by passing in the
+To remove a repository (repo is a short alias for repositories):
    <comment>%command.full_name% --unset repo.foo</comment>
 To disable packagist:
    <comment>%command.full_name% repo.packagist false</comment>
 You can alter repositories in the global config.json file by passing in the
 <info>--global</info> option.
 To edit the file in an external editor:
@ -114,6 +141,11 @@ EOT
            ? ($this->config->get('home') . '/config.json')
            : $input->getOption('file');
        // create global composer.json if this was invoked using `composer global config`
        if ($configFile === 'composer.json' && !file_exists($configFile) && realpath(getcwd()) === realpath($this->config->get('home'))) {
            file_put_contents($configFile, "{\n}\n");
        }
        $this->configFile = new JsonFile($configFile);
        $this->configSource = new JsonConfigSource($this->configFile);
@ -230,55 +262,13 @@ EOT
                $value = json_encode($value);
            }
-            $output->writeln($value);
+            $this->getIO()->write($value);
            return 0;
        }
        $values = $input->getArgument('setting-value'); // what the user is trying to add/change
        // handle repositories
        if (preg_match('/^repos?(?:itories)?\.(.+)/', $settingKey, $matches)) {
            if ($input->getOption('unset')) {
                return $this->configSource->removeRepository($matches[1]);
            }
            if (2 !== count($values)) {
                throw new \RuntimeException('You must pass the type and a url. Example: php composer.phar config repositories.foo vcs http://bar.com');
            }
            return $this->configSource->addRepository($matches[1], array(
                'type' => $values[0],
                'url'  => $values[1],
            ));
        }
        // handle github-oauth
        if (preg_match('/^(github-oauth|http-basic)\.(.+)/', $settingKey, $matches)) {
            if ($input->getOption('unset')) {
                $this->authConfigSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                return;
            }
            if ($matches[1] === 'github-oauth') {
                if (1 !== count($values)) {
                    throw new \RuntimeException('Too many arguments, expected only one token');
                }
                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                $this->authConfigSource->addConfigSetting($matches[1].'.'.$matches[2], $values[0]);
            } elseif ($matches[1] === 'http-basic') {
                if (2 !== count($values)) {
                    throw new \RuntimeException('Expected two arguments (username, password), got '.count($values));
                }
                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                $this->authConfigSource->addConfigSetting($matches[1].'.'.$matches[2], array('username' => $values[0], 'password' => $values[1]));
            }
            return;
        }
        $booleanValidator = function ($val) { return in_array($val, array('true', 'false', '1', '0'), true); };
        $booleanNormalizer = function ($val) { return $val !== 'false' && (bool) $val; };
@ -402,6 +392,64 @@ EOT
            }
        }
        // handle repositories
        if (preg_match('/^repos?(?:itories)?\.(.+)/', $settingKey, $matches)) {
            if ($input->getOption('unset')) {
                return $this->configSource->removeRepository($matches[1]);
            }
            if (2 === count($values)) {
                return $this->configSource->addRepository($matches[1], array(
                    'type' => $values[0],
                    'url'  => $values[1],
                ));
            }
            if (1 === count($values)) {
                $bool = strtolower($values[0]);
                if (true === $booleanValidator($bool) && false === $booleanNormalizer($bool)) {
                    return $this->configSource->addRepository($matches[1], false);
                }
            }
            throw new \RuntimeException('You must pass the type and a url. Example: php composer.phar config repositories.foo vcs http://bar.com');
        }
        // handle platform
        if (preg_match('/^platform\.(.+)/', $settingKey, $matches)) {
            if ($input->getOption('unset')) {
                return $this->configSource->removeConfigSetting($settingKey);
            }
            return $this->configSource->addConfigSetting($settingKey, $values[0]);
        }
        // handle github-oauth
        if (preg_match('/^(github-oauth|http-basic)\.(.+)/', $settingKey, $matches)) {
            if ($input->getOption('unset')) {
                $this->authConfigSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                return;
            }
            if ($matches[1] === 'github-oauth') {
                if (1 !== count($values)) {
                    throw new \RuntimeException('Too many arguments, expected only one token');
                }
                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                $this->authConfigSource->addConfigSetting($matches[1].'.'.$matches[2], $values[0]);
            } elseif ($matches[1] === 'http-basic') {
                if (2 !== count($values)) {
                    throw new \RuntimeException('Expected two arguments (username, password), got '.count($values));
                }
                $this->configSource->removeConfigSetting($matches[1].'.'.$matches[2]);
                $this->authConfigSource->addConfigSetting($matches[1].'.'.$matches[2], array('username' => $values[0], 'password' => $values[1]));
            }
            return;
        }
        throw new \InvalidArgumentException('Setting '.$settingKey.' does not exist or is not supported by this command');
    }
@ -450,9 +498,9 @@ EOT
            }
            if (is_string($rawVal) && $rawVal != $value) {
-                $output->writeln('[<comment>' . $k . $key . '</comment>] <info>' . $rawVal . ' (' . $value . ')</info>');
+                $this->getIO()->write('[<comment>' . $k . $key . '</comment>] <info>' . $rawVal . ' (' . $value . ')</info>');
            } else {
-                $output->writeln('[<comment>' . $k . $key . '</comment>] <info>' . $value . '</info>');
+                $this->getIO()->write('[<comment>' . $k . $key . '</comment>] <info>' . $value . '</info>');
            }
        }
    }
--- a/src/Composer/Command/CreateProjectCommand.php
+++ b/src/Composer/Command/CreateProjectCommand.php
@ -101,12 +101,10 @@ EOT
    {
        $config = Factory::createConfig();
-        $preferSource = false;
+        $this->updatePreferredOptions($config, $input, $preferSource, $preferDist, true);
        $preferDist = false;
        $this->updatePreferredOptions($config, $input, $preferSource, $preferDist);
        if ($input->getOption('no-custom-installers')) {
-            $output->writeln('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
+            $this->getIO()->writeError('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
            $input->setOption('no-plugins', true);
        }
@ -145,11 +143,13 @@ EOT
        }
        $composer = Factory::create($io, null, $disablePlugins);
        $composer->getDownloadManager()->setOutputProgress(!$noProgress);
        $fs = new Filesystem();
        if ($noScripts === false) {
            // dispatch event
-            $composer->getEventDispatcher()->dispatchCommandEvent(ScriptEvents::POST_ROOT_PACKAGE_INSTALL, $installDevPackages);
+            $composer->getEventDispatcher()->dispatchScript(ScriptEvents::POST_ROOT_PACKAGE_INSTALL, $installDevPackages);
        }
        $rootPackageConfig = $composer->getConfig();
@ -196,7 +196,7 @@ EOT
                    }
                }
            } catch (\Exception $e) {
-                $io->write('<error>An error occurred while removing the VCS metadata: '.$e->getMessage().'</error>');
+                $io->writeError('<error>An error occurred while removing the VCS metadata: '.$e->getMessage().'</error>');
            }
            $hasVcs = false;
@ -217,7 +217,7 @@ EOT
        if ($noScripts === false) {
            // dispatch event
-            $composer->getEventDispatcher()->dispatchCommandEvent(ScriptEvents::POST_CREATE_PROJECT_CMD, $installDevPackages);
+            $composer->getEventDispatcher()->dispatchScript(ScriptEvents::POST_CREATE_PROJECT_CMD, $installDevPackages);
        }
        chdir($oldCwd);
@ -288,10 +288,20 @@ EOT
            $directory = getcwd() . DIRECTORY_SEPARATOR . array_pop($parts);
        }
-        $io->write('<info>Installing ' . $package->getName() . ' (' . VersionParser::formatVersion($package, false) . ')</info>');
+        // handler Ctrl+C for unix-like systems
        if (function_exists('pcntl_signal')) {
            declare(ticks = 100);
            pcntl_signal(SIGINT, function() use ($directory) {
                $fs = new Filesystem();
                $fs->removeDirectory($directory);
                exit(130);
            });
        }
        $io->writeError('<info>Installing ' . $package->getName() . ' (' . VersionParser::formatVersion($package, false) . ')</info>');
        if ($disablePlugins) {
-            $io->write('<info>Plugins have been disabled.</info>');
+            $io->writeError('<info>Plugins have been disabled.</info>');
        }
        if (0 === strpos($package->getPrettyVersion(), 'dev-') && in_array($package->getSourceType(), array('git', 'hg'))) {
@ -311,10 +321,11 @@ EOT
        $installedFromVcs = 'source' === $package->getInstallationSource();
-        $io->write('<info>Created project in ' . $directory . '</info>');
+        $io->writeError('<info>Created project in ' . $directory . '</info>');
        chdir($directory);
-        putenv('COMPOSER_ROOT_VERSION='.$package->getPrettyVersion());
+        $_SERVER['COMPOSER_ROOT_VERSION'] = $package->getPrettyVersion();
        putenv('COMPOSER_ROOT_VERSION='.$_SERVER['COMPOSER_ROOT_VERSION']);
        return $installedFromVcs;
    }
@ -338,15 +349,16 @@ EOT
     * @param boolean        $preferSource
     * @param boolean        $preferDist
     */
-    protected function updatePreferredOptions(Config $config, InputInterface $input, &$preferSource, &$preferDist)
+    protected function updatePreferredOptions(Config $config, InputInterface $input, &$preferSource, &$preferDist, $keepVcsRequiresPreferSource = false)
    {
        $preferSource = false;
        $preferDist = false;
        switch ($config->get('preferred-install')) {
            case 'source':
                $preferSource = true;
                $preferDist = false;
                break;
            case 'dist':
                $preferSource = false;
                $preferDist = true;
                break;
            case 'auto':
@ -355,8 +367,8 @@ EOT
                break;
        }
-        if ($input->getOption('prefer-source') || $input->getOption('prefer-dist')) {
+        if ($input->getOption('prefer-source') || $input->getOption('prefer-dist') || ($keepVcsRequiresPreferSource && $input->getOption('keep-vcs'))) {
-            $preferSource = $input->getOption('prefer-source');
+            $preferSource = $input->getOption('prefer-source') || ($keepVcsRequiresPreferSource && $input->getOption('keep-vcs'));
            $preferDist = $input->getOption('prefer-dist');
        }
    }
--- a/src/Composer/Command/DependsCommand.php
+++ b/src/Composer/Command/DependsCommand.php
@ -96,9 +96,9 @@ EOT
        if ($messages) {
            sort($messages);
-            $output->writeln($messages);
+            $this->getIO()->write($messages);
        } else {
-            $output->writeln('<info>There is no installed package depending on "'.$needle.'".</info>');
+            $this->getIO()->writeError('<info>There is no installed package depending on "'.$needle.'".</info>');
        }
    }
 }
--- a/src/Composer/Command/DiagnoseCommand.php
+++ b/src/Composer/Command/DiagnoseCommand.php
@ -29,8 +29,13 @@ use Symfony\Component\Console\Output\OutputInterface;
 */
 class DiagnoseCommand extends Command
 {
    /** @var RemoteFileSystem */
    protected $rfs;
    /** @var ProcessExecutor */
    protected $process;
    /** @var int */
    protected $failures = 0;
    protected function configure()
@ -46,15 +51,19 @@ EOT
        ;
    }
    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $composer = $this->getComposer(false);
        if ($composer) {
            $commandEvent = new CommandEvent(PluginEvents::COMMAND, 'diagnose', $input, $output);
            $composer->getEventDispatcher()->dispatch($commandEvent->getName(), $commandEvent);
-            $output->write('Checking composer.json: ');
+            $this->getIO()->write('Checking composer.json: ', false);
-            $this->outputResult($output, $this->checkComposerSchema());
+            $this->outputResult($this->checkComposerSchema());
        }
        if ($composer) {
@ -66,37 +75,64 @@ EOT
        $this->rfs = new RemoteFilesystem($this->getIO(), $config);
        $this->process = new ProcessExecutor($this->getIO());
-        $output->write('Checking platform settings: ');
+        $this->getIO()->write('Checking platform settings: ', false);
-        $this->outputResult($output, $this->checkPlatform());
+        $this->outputResult($this->checkPlatform());
-        $output->write('Checking git settings: ');
+        $this->getIO()->write('Checking git settings: ', false);
-        $this->outputResult($output, $this->checkGit());
+        $this->outputResult($this->checkGit());
-        $output->write('Checking http connectivity: ');
+        $this->getIO()->write('Checking http connectivity to packagist: ', false);
-        $this->outputResult($output, $this->checkHttp());
+        $this->outputResult($this->checkHttp('http'));
        $this->getIO()->write('Checking https connectivity to packagist: ', false);
        $this->outputResult($this->checkHttp('https'));
        $opts = stream_context_get_options(StreamContextFactory::getContext('http://example.org'));
        if (!empty($opts['http']['proxy'])) {
-            $output->write('Checking HTTP proxy: ');
+            $this->getIO()->write('Checking HTTP proxy: ', false);
-            $this->outputResult($output, $this->checkHttpProxy());
+            $this->outputResult($this->checkHttpProxy());
-            $output->write('Checking HTTP proxy support for request_fulluri: ');
+            $this->getIO()->write('Checking HTTP proxy support for request_fulluri: ', false);
-            $this->outputResult($output, $this->checkHttpProxyFullUriRequestParam());
+            $this->outputResult($this->checkHttpProxyFullUriRequestParam());
-            $output->write('Checking HTTPS proxy support for request_fulluri: ');
+            $this->getIO()->write('Checking HTTPS proxy support for request_fulluri: ', false);
-            $this->outputResult($output, $this->checkHttpsProxyFullUriRequestParam());
+            $this->outputResult($this->checkHttpsProxyFullUriRequestParam());
        }
        if ($oauth = $config->get('github-oauth')) {
            foreach ($oauth as $domain => $token) {
-                $output->write('Checking '.$domain.' oauth access: ');
+                $this->getIO()->write('Checking '.$domain.' oauth access: ', false);
-                $this->outputResult($output, $this->checkGithubOauth($domain, $token));
+                $this->outputResult($this->checkGithubOauth($domain, $token));
            }
        } else {
            $this->getIO()->write('Checking github.com rate limit: ', false);
            try {
                $rate = $this->getGithubRateLimit('github.com');
                $this->outputResult(true);
                if (10 > $rate['remaining']) {
                    $this->getIO()->write('<warning>WARNING</warning>');
                    $this->getIO()->write(sprintf(
                        '<comment>Github has a rate limit on their API. '
                        . 'You currently have <options=bold>%u</options=bold> '
                        . 'out of <options=bold>%u</options=bold> requests left.' . PHP_EOL
                        . 'See https://developer.github.com/v3/#rate-limiting and also' . PHP_EOL
                        . '    https://getcomposer.org/doc/articles/troubleshooting.md#api-rate-limit-and-oauth-tokens</comment>',
                        $rate['remaining'],
                        $rate['limit']
                    ));
                }
            } catch (\Exception $e) {
                if ($e instanceof TransportException && $e->getCode() === 401) {
                    $this->outputResult('<comment>The oauth token for github.com seems invalid, run "composer config --global --unset github-oauth.github.com" to remove it</comment>');
                } else {
                    $this->outputResult($e);
                }
            }
        }
-        $output->write('Checking disk free space: ');
+        $this->getIO()->write('Checking disk free space: ', false);
-        $this->outputResult($output, $this->checkDiskSpace($config));
+        $this->outputResult($this->checkDiskSpace($config));
-        $output->write('Checking composer version: ');
+        $this->getIO()->write('Checking composer version: ', false);
-        $this->outputResult($output, $this->checkVersion());
+        $this->outputResult($this->checkVersion());
        return $this->failures;
    }
@ -129,17 +165,16 @@ EOT
    {
        $this->process->execute('git config color.ui', $output);
        if (strtolower(trim($output)) === 'always') {
-            return '<warning>Your git color.ui setting is set to always, this is known to create issues. Use "git config --global color.ui true" to set it correctly.</warning>';
+            return '<comment>Your git color.ui setting is set to always, this is known to create issues. Use "git config --global color.ui true" to set it correctly.</comment>';
        }
        return true;
    }
-    private function checkHttp()
+    private function checkHttp($proto)
    {
        $protocol = extension_loaded('openssl') ? 'https' : 'http';
        try {
-            $json = $this->rfs->getContents('packagist.org', $protocol . '://packagist.org/packages.json', false);
+            $this->rfs->getContents('packagist.org', $proto . '://packagist.org/packages.json', false);
        } catch (\Exception $e) {
            return $e;
        }
@ -207,7 +242,7 @@ EOT
        $url = 'https://api.github.com/repos/Seldaek/jsonlint/zipball/1.0.0';
        try {
-            $rfcResult = $this->rfs->getContents('github.com', $url, false);
+            $this->rfs->getContents('github.com', $url, false);
        } catch (TransportException $e) {
            try {
                $this->rfs->getContents('github.com', $url, false, array('http' => array('request_fulluri' => false)));
@ -227,16 +262,37 @@ EOT
        try {
            $url = $domain === 'github.com' ? 'https://api.'.$domain.'/user/repos' : 'https://'.$domain.'/api/v3/user/repos';
-            return $this->rfs->getContents($domain, $url, false) ? true : 'Unexpected error';
+            return $this->rfs->getContents($domain, $url, false, array(
                'retry-auth-failure' => false
            )) ? true : 'Unexpected error';
        } catch (\Exception $e) {
            if ($e instanceof TransportException && $e->getCode() === 401) {
-                return '<warning>The oauth token for '.$domain.' seems invalid, run "composer config --global --unset github-oauth.'.$domain.'" to remove it</warning>';
+                return '<comment>The oauth token for '.$domain.' seems invalid, run "composer config --global --unset github-oauth.'.$domain.'" to remove it</comment>';
            }
            return $e;
        }
    }
    /**
     * @param string $domain
     * @param string $token
     * @return array
     * @throws TransportException
     */
    private function getGithubRateLimit($domain, $token = null)
    {
        if ($token) {
            $this->getIO()->setAuthentication($domain, $token, 'x-oauth-basic');
        }
        $url = $domain === 'github.com' ? 'https://api.'.$domain.'/rate_limit' : 'https://'.$domain.'/api/rate_limit';
        $json = $this->rfs->getContents($domain, $url, false, array('retry-auth-failure' => false));
        $data = json_decode($json, true);
        return $data['resources']['core'];
    }
    private function checkDiskSpace($config)
    {
        $minSpaceFree = 1024*1024;
@ -255,23 +311,26 @@ EOT
        $latest = trim($this->rfs->getContents('getcomposer.org', $protocol . '://getcomposer.org/version', false));
        if (Composer::VERSION !== $latest && Composer::VERSION !== '@package_version@') {
-            return '<warning>You are not running the latest version</warning>';
+            return '<comment>You are not running the latest version</comment>';
        }
        return true;
    }
-    private function outputResult(OutputInterface $output, $result)
+    /**
     * @param bool|string|\Exception $result
     */
    private function outputResult($result)
    {
        if (true === $result) {
-            $output->writeln('<info>OK</info>');
+            $this->getIO()->write('<info>OK</info>');
        } else {
            $this->failures++;
-            $output->writeln('<error>FAIL</error>');
+            $this->getIO()->write('<error>FAIL</error>');
            if ($result instanceof \Exception) {
-                $output->writeln('['.get_class($result).'] '.$result->getMessage());
+                $this->getIO()->write('['.get_class($result).'] '.$result->getMessage());
            } elseif ($result) {
-                $output->writeln($result);
+                $this->getIO()->write(trim($result));
            }
        }
    }
@ -280,7 +339,7 @@ EOT
    {
        $output = '';
        $out = function ($msg, $style) use (&$output) {
-            $output .= '<'.$style.'>'.$msg.'</'.$style.'>';
+            $output .= '<'.$style.'>'.$msg.'</'.$style.'>'.PHP_EOL;
        };
        // code below taken from getcomposer.org/installer, any changes should be made there and replicated here
@ -296,32 +355,46 @@ EOT
        }
        $iniMessage .= PHP_EOL.'If you can not modify the ini file, you can also run `php -d option=value` to modify ini values on the fly. You can use -d multiple times.';
        if (!function_exists('json_decode')) {
            $errors['json'] = true;
        }
        if (!extension_loaded('Phar')) {
            $errors['phar'] = true;
        }
        if (!extension_loaded('filter')) {
            $errors['filter'] = true;
        }
        if (!extension_loaded('hash')) {
            $errors['hash'] = true;
        }
        if (!ini_get('allow_url_fopen')) {
            $errors['allow_url_fopen'] = true;
        }
-        if (version_compare(PHP_VERSION, '5.3.2', '<')) {
+        if (extension_loaded('ionCube Loader') && ioncube_loader_iversion() < 40009) {
            $errors['ioncube'] = ioncube_loader_version();
        }
        if (PHP_VERSION_ID < 50302) {
            $errors['php'] = PHP_VERSION;
        }
-        if (!isset($errors['php']) && version_compare(PHP_VERSION, '5.3.4', '<')) {
+        if (!isset($errors['php']) && PHP_VERSION_ID < 50304) {
            $warnings['php'] = PHP_VERSION;
        }
        if (!extension_loaded('openssl')) {
-            $warnings['openssl'] = true;
+            $errors['openssl'] = true;
        }
        if (!defined('HHVM_VERSION') && !extension_loaded('apcu') && ini_get('apc.enable_cli')) {
            $warnings['apc_cli'] = true;
        }
        if (ini_get('xdebug.profiler_enabled')) {
            $warnings['xdebug_profile'] = true;
        } elseif (extension_loaded('xdebug')) {
            $warnings['xdebug_loaded'] = true;
        }
        ob_start();
        phpinfo(INFO_GENERAL);
        $phpinfo = ob_get_clean();
@ -337,9 +410,49 @@ EOT
            }
        }
        if (ini_get('xdebug.profiler_enabled')) {
            $warnings['xdebug_profile'] = true;
        } elseif (extension_loaded('xdebug')) {
            $warnings['xdebug_loaded'] = true;
        }
        if (!empty($errors)) {
            foreach ($errors as $error => $current) {
                switch ($error) {
                    case 'json':
                        $text = PHP_EOL."The json extension is missing.".PHP_EOL;
                        $text .= "Install it or recompile php without --disable-json";
                        break;
                    case 'phar':
                        $text = PHP_EOL."The phar extension is missing.".PHP_EOL;
                        $text .= "Install it or recompile php without --disable-phar";
                        break;
                    case 'filter':
                        $text = PHP_EOL."The filter extension is missing.".PHP_EOL;
                        $text .= "Install it or recompile php without --disable-filter";
                        break;
                    case 'hash':
                        $text = PHP_EOL."The hash extension is missing.".PHP_EOL;
                        $text .= "Install it or recompile php without --disable-hash";
                        break;
                    case 'unicode':
                        $text = PHP_EOL."The detect_unicode setting must be disabled.".PHP_EOL;
                        $text .= "Add the following to the end of your `php.ini`:".PHP_EOL;
                        $text .= "    detect_unicode = Off";
                        $displayIniMessage = true;
                        break;
                    case 'suhosin':
                        $text = PHP_EOL."The suhosin.executor.include.whitelist setting is incorrect.".PHP_EOL;
                        $text .= "Add the following to the end of your `php.ini` or suhosin.ini (Example path [for Debian]: /etc/php5/cli/conf.d/suhosin.ini):".PHP_EOL;
                        $text .= "    suhosin.executor.include.whitelist = phar ".$current;
                        $displayIniMessage = true;
                        break;
                    case 'php':
                        $text = PHP_EOL."Your PHP ({$current}) is too old, you must upgrade to PHP 5.3.2 or higher.";
                        break;
@ -350,6 +463,18 @@ EOT
                        $text .= "    allow_url_fopen = On";
                        $displayIniMessage = true;
                        break;
                    case 'ioncube':
                        $text = PHP_EOL."Your ionCube Loader extension ($current) is incompatible with Phar files.".PHP_EOL;
                        $text .= "Upgrade to ionCube 4.0.9 or higher or remove this line (path may be different) from your `php.ini` to disable it:".PHP_EOL;
                        $text .= "    zend_extension = /usr/lib/php5/20090626+lfs/ioncube_loader_lin_5.3.so";
                        $displayIniMessage = true;
                        break;
                    case 'openssl':
                        $text = PHP_EOL."The openssl extension is missing, which means that secure HTTPS transfers are impossible.".PHP_EOL;
                        $text .= "If possible you should enable it or recompile php with --with-openssl";
                        break;
                }
                $out($text, 'error');
            }
@ -361,51 +486,46 @@ EOT
            foreach ($warnings as $warning => $current) {
                switch ($warning) {
                    case 'apc_cli':
-                        $text = PHP_EOL."The apc.enable_cli setting is incorrect.".PHP_EOL;
+                        $text  = "The apc.enable_cli setting is incorrect.".PHP_EOL;
                        $text .= "Add the following to the end of your `php.ini`:".PHP_EOL;
-                        $text .= "    apc.enable_cli = Off";
+                        $text .= "  apc.enable_cli = Off";
                        $displayIniMessage = true;
                        break;
                    case 'sigchild':
-                        $text = PHP_EOL."PHP was compiled with --enable-sigchild which can cause issues on some platforms.".PHP_EOL;
+                        $text  = "PHP was compiled with --enable-sigchild which can cause issues on some platforms.".PHP_EOL;
                        $text .= "Recompile it without this flag if possible, see also:".PHP_EOL;
-                        $text .= "    https://bugs.php.net/bug.php?id=22999";
+                        $text .= "  https://bugs.php.net/bug.php?id=22999";
                        break;
                    case 'curlwrappers':
-                        $text = PHP_EOL."PHP was compiled with --with-curlwrappers which will cause issues with HTTP authentication and GitHub.".PHP_EOL;
+                        $text  = "PHP was compiled with --with-curlwrappers which will cause issues with HTTP authentication and GitHub.".PHP_EOL;
-                        $text .= "Recompile it without this flag if possible";
+                        $text .= " Recompile it without this flag if possible";
                        break;
                    case 'openssl':
                        $text = PHP_EOL."The openssl extension is missing, which will reduce the security and stability of Composer.".PHP_EOL;
                        $text .= "If possible you should enable it or recompile php with --with-openssl";
                        break;
                    case 'php':
-                        $text = PHP_EOL."Your PHP ({$current}) is quite old, upgrading to PHP 5.3.4 or higher is recommended.".PHP_EOL;
+                        $text  = "Your PHP ({$current}) is quite old, upgrading to PHP 5.3.4 or higher is recommended.".PHP_EOL;
-                        $text .= "Composer works with 5.3.2+ for most people, but there might be edge case issues.";
+                        $text .= " Composer works with 5.3.2+ for most people, but there might be edge case issues.";
                        break;
                    case 'xdebug_loaded':
-                        $text = PHP_EOL."The xdebug extension is loaded, this can slow down Composer a little.".PHP_EOL;
+                        $text  = "The xdebug extension is loaded, this can slow down Composer a little.".PHP_EOL;
-                        $text .= "Disabling it when using Composer is recommended, but should not cause issues beyond slowness.";
+                        $text .= " Disabling it when using Composer is recommended.";
                        break;
                    case 'xdebug_profile':
-                        $text = PHP_EOL."The xdebug.profiler_enabled setting is enabled, this can slow down Composer a lot.".PHP_EOL;
+                        $text  = "The xdebug.profiler_enabled setting is enabled, this can slow down Composer a lot.".PHP_EOL;
                        $text .= "Add the following to the end of your `php.ini` to disable it:".PHP_EOL;
-                        $text .= "    xdebug.profiler_enabled = 0";
+                        $text .= "  xdebug.profiler_enabled = 0";
                        $displayIniMessage = true;
                        break;
                }
-                $out($text, 'warning');
+                $out($text, 'comment');
            }
        }
        if ($displayIniMessage) {
-            $out($iniMessage, 'warning');
+            $out($iniMessage, 'comment');
        }
        return !$warnings && !$errors ? true : $output;
--- a/src/Composer/Command/DumpAutoloadCommand.php
+++ b/src/Composer/Command/DumpAutoloadCommand.php
@ -55,9 +55,9 @@ EOT
        $optimize = $input->getOption('optimize') || $config->get('optimize-autoloader') || $config->get('classmap-authoritative');
        if ($optimize) {
-            $output->writeln('<info>Generating optimized autoload files</info>');
+            $this->getIO()->writeError('<info>Generating optimized autoload files</info>');
        } else {
-            $output->writeln('<info>Generating autoload files</info>');
+            $this->getIO()->writeError('<info>Generating autoload files</info>');
        }
        $generator = $composer->getAutoloadGenerator();
--- a/src/Composer/Command/GlobalCommand.php
+++ b/src/Composer/Command/GlobalCommand.php
@ -72,7 +72,7 @@ EOT
        // change to global dir
        $config = Factory::createConfig();
        chdir($config->get('home'));
-        $output->writeln('<info>Changed current directory to '.$config->get('home').'</info>');
+        $this->getIO()->writeError('<info>Changed current directory to '.$config->get('home').'</info>');
        // create new input without "global" command prefix
        $input = new StringInput(preg_replace('{\bg(?:l(?:o(?:b(?:a(?:l)?)?)?)?)?\b}', '', $input->__toString(), 1));
--- a/src/Composer/Command/Helper/DialogHelper.php
+++ b/src/Composer/Command/Helper/DialogHelper.php
@ -1,36 +0,0 @@
 <?php
 /*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
 namespace Composer\Command\Helper;
 use Symfony\Component\Console\Helper\DialogHelper as BaseDialogHelper;
 class DialogHelper extends BaseDialogHelper
 {
    /**
     * Build text for asking a question. For example:
     *
     *  "Do you want to continue [yes]:"
     *
     * @param string $question The question you want to ask
     * @param mixed  $default  Default value to add to message, if false no default will be shown
     * @param string $sep      Separation char for between message and user input
     *
     * @return string
     */
    public function getQuestion($question, $default = null, $sep = ':')
    {
        return $default !== null ?
            sprintf('<info>%s</info> [<comment>%s</comment>]%s ', $question, $default, $sep) :
            sprintf('<info>%s</info>%s ', $question, $sep);
    }
 }
--- a/src/Composer/Command/HomeCommand.php
+++ b/src/Composer/Command/HomeCommand.php
@ -12,11 +12,11 @@
 namespace Composer\Command;
 use Composer\DependencyResolver\Pool;
 use Composer\Factory;
 use Composer\Package\CompletePackageInterface;
 use Composer\Repository\CompositeRepository;
 use Composer\Repository\RepositoryInterface;
 use Composer\Repository\ArrayRepository;
 use Composer\Util\ProcessExecutor;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputOption;
@ -57,65 +57,55 @@ EOT
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
-        $repo = $this->initializeRepo();
+        $repos = $this->initializeRepos();
        $return = 0;
        foreach ($input->getArgument('packages') as $packageName) {
-            $package = $this->getPackage($repo, $packageName);
+            $handled = false;
            $packageExists = false;
            foreach ($repos as $repo) {
                foreach ($repo->findPackages($packageName) as $package) {
                    $packageExists = true;
                    if ($this->handlePackage($package, $input->getOption('homepage'), $input->getOption('show'))) {
                        $handled = true;
                        break 2;
                    }
                }
            }
-            if (!$package instanceof CompletePackageInterface) {
+            if (!$packageExists) {
                $return = 1;
-                $output->writeln('<warning>Package '.$packageName.' not found</warning>');
+                $this->getIO()->writeError('<warning>Package '.$packageName.' not found</warning>');
                continue;
            }
-            $support = $package->getSupport();
+            if (!$handled) {
            $url = isset($support['source']) ? $support['source'] : $package->getSourceUrl();
            if (!$url || $input->getOption('homepage')) {
                $url = $package->getHomepage();
            }
            if (!filter_var($url, FILTER_VALIDATE_URL)) {
                $return = 1;
-                $output->writeln('<warning>'.($input->getOption('homepage') ? 'Invalid or missing homepage' : 'Invalid or missing repository URL').' for '.$packageName.'</warning>');
+                $this->getIO()->writeError('<warning>'.($input->getOption('homepage') ? 'Invalid or missing homepage' : 'Invalid or missing repository URL').' for '.$packageName.'</warning>');
                continue;
            }
            if ($input->getOption('show')) {
                $output->writeln(sprintf('<info>%s</info>', $url));
            } else {
                $this->openBrowser($url);
            }
        }
        return $return;
    }
-    /**
+    private function handlePackage(CompletePackageInterface $package, $showHomepage, $showOnly)
     * finds a package by name
     *
     * @param  RepositoryInterface      $repos
     * @param  string                   $name
     * @return CompletePackageInterface
     */
    protected function getPackage(RepositoryInterface $repos, $name)
    {
-        $name = strtolower($name);
+        $support = $package->getSupport();
-        $pool = new Pool('dev');
+        $url = isset($support['source']) ? $support['source'] : $package->getSourceUrl();
-        $pool->addRepository($repos);
+        if (!$url || $showHomepage) {
-        $matches = $pool->whatProvides($name);
+            $url = $package->getHomepage();
        foreach ($matches as $index => $package) {
            // skip providers/replacers
            if ($package->getName() !== $name) {
                unset($matches[$index]);
                continue;
            }
            return $package;
        }
        if (!$url || !filter_var($url, FILTER_VALIDATE_URL)) {
            return false;
        }
        if ($showOnly) {
            $this->getIO()->write(sprintf('<info>%s</info>', $url));
        } else {
            $this->openBrowser($url);
        }
        return true;
    }
    /**
@ -139,26 +129,31 @@ EOT
        } elseif (0 === $osx) {
            passthru('open ' . $url);
        } else {
-            $this->getIO()->write('no suitable browser opening command found, open yourself: ' . $url);
+            $this->getIO()->writeError('no suitable browser opening command found, open yourself: ' . $url);
        }
    }
    /**
-     * Initializes the repo
+     * Initializes repositories
     *
-     * @return CompositeRepository
+     * Returns an array of repos in order they should be checked in
     *
     * @return RepositoryInterface[]
     */
-    private function initializeRepo()
+    private function initializeRepos()
    {
        $composer = $this->getComposer(false);
        if ($composer) {
-            $repo = new CompositeRepository($composer->getRepositoryManager()->getRepositories());
+            return array_merge(
-        } else {
+                array(new ArrayRepository(array($composer->getPackage()))), // root package
-            $defaultRepos = Factory::createDefaultRepositories($this->getIO());
+                array($composer->getRepositoryManager()->getLocalRepository()), // installed packages
-            $repo = new CompositeRepository($defaultRepos);
+                $composer->getRepositoryManager()->getRepositories() // remotes
            );
        }
-        return $repo;
+        $defaultRepos = Factory::createDefaultRepositories($this->getIO());
        return $defaultRepos;
    }
 }
--- a/src/Composer/Command/InitCommand.php
+++ b/src/Composer/Command/InitCommand.php
@ -33,28 +33,18 @@ use Symfony\Component\Process\ExecutableFinder;
 */
 class InitCommand extends Command
 {
    /** @var CompositeRepository */
    protected $repos;
    /** @var array */
    private $gitConfig;
    /** @var Pool */
    private $pool;
-    public function parseAuthorString($author)
+    /**
-    {
+     * {@inheritdoc}
-        if (preg_match('/^(?P<name>[- \.,\p{L}\'’]+) <(?P<email>.+?)>$/u', $author, $match)) {
+     */
            if ($this->isValidEmail($match['email'])) {
                return array(
                    'name'  => trim($match['name']),
                    'email' => $match['email']
                );
            }
        }
        throw new \InvalidArgumentException(
            'Invalid author string.  Must be in the format: '.
            'John Smith <john@example.com>'
        );
    }
    protected function configure()
    {
        $this
@ -65,6 +55,7 @@ class InitCommand extends Command
                new InputOption('description', null, InputOption::VALUE_REQUIRED, 'Description of package'),
                new InputOption('author', null, InputOption::VALUE_REQUIRED, 'Author name of package'),
                // new InputOption('version', null, InputOption::VALUE_NONE, 'Version of package'),
                new InputOption('type', null, InputOption::VALUE_OPTIONAL, 'Type of package'),
                new InputOption('homepage', null, InputOption::VALUE_REQUIRED, 'Homepage of package'),
                new InputOption('require', null, InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED, 'Package to require with a version constraint, e.g. foo/bar:1.0.0 or foo/bar=1.0.0 or "foo/bar 1.0.0"'),
                new InputOption('require-dev', null, InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED, 'Package to require for development with a version constraint, e.g. foo/bar:1.0.0 or foo/bar=1.0.0 or "foo/bar 1.0.0"'),
@ -82,11 +73,12 @@ EOT
        ;
    }
    /**
     * {@inheritdoc}
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
-        $dialog = $this->getHelperSet()->get('dialog');
+        $whitelist = array('name', 'description', 'author', 'type', 'homepage', 'require', 'require-dev', 'stability', 'license');
        $whitelist = array('name', 'description', 'author', 'homepage', 'require', 'require-dev', 'stability', 'license');
        $options = array_filter(array_intersect_key($input->getOptions(), array_flip($whitelist)));
@ -113,17 +105,12 @@ EOT
        }
        $file = new JsonFile('composer.json');
        $json = $file->encode($options);
        if ($input->isInteractive()) {
-            $output->writeln(array(
+            $this->getIO()->writeError(array('', $json, ''));
-                '',
+            if (!$this->getIO()->askConfirmation('Do you confirm generation [<comment>yes</comment>]? ', true)) {
-                $json,
+                $this->getIO()->writeError('<error>Command aborted</error>');
                ''
            ));
            if (!$dialog->askConfirmation($output, $dialog->getQuestion('Do you confirm generation', 'yes', '?'), true)) {
                $output->writeln('<error>Command aborted</error>');
                return 1;
            }
@ -139,29 +126,32 @@ EOT
            }
            if (!$this->hasVendorIgnore($ignoreFile)) {
-                $question = 'Would you like the <info>vendor</info> directory added to your <info>.gitignore</info> [<comment>yes</comment>]?';
+                $question = 'Would you like the <info>vendor</info> directory added to your <info>.gitignore</info> [<comment>yes</comment>]? ';
-                if ($dialog->askConfirmation($output, $question, true)) {
+                if ($this->getIO()->askConfirmation($question, true)) {
                    $this->addVendorIgnore($ignoreFile);
                }
            }
        }
    }
    /**
     * {@inheritdoc}
     */
    protected function interact(InputInterface $input, OutputInterface $output)
    {
        $git = $this->getGitConfig();
        $dialog = $this->getHelperSet()->get('dialog');
        $formatter = $this->getHelperSet()->get('formatter');
-        $output->writeln(array(
+
        $this->getIO()->writeError(array(
            '',
            $formatter->formatBlock('Welcome to the Composer config generator', 'bg=blue;fg=white', true),
            ''
        ));
        // namespace
-        $output->writeln(array(
+        $this->getIO()->writeError(array(
            '',
            'This command will guide you through creating your composer.json config.',
            '',
@ -191,9 +181,8 @@ EOT
            }
        }
-        $name = $dialog->askAndValidate(
+        $name = $this->getIO()->askAndValidate(
-            $output,
+            'Package name (<vendor>/<name>) [<comment>'.$name.'</comment>]: ',
            $dialog->getQuestion('Package name (<vendor>/<name>)', $name),
            function ($value) use ($name) {
                if (null === $value) {
                    return $name;
@ -206,14 +195,15 @@ EOT
                }
                return $value;
-            }
+            },
            null,
            $name
        );
        $input->setOption('name', $name);
        $description = $input->getOption('description') ?: false;
-        $description = $dialog->ask(
+        $description = $this->getIO()->ask(
-            $output,
+            'Description [<comment>'.$description.'</comment>]: ',
            $dialog->getQuestion('Description', $description),
            $description
        );
        $input->setOption('description', $description);
@ -225,22 +215,22 @@ EOT
        }
        $self = $this;
-        $author = $dialog->askAndValidate(
+        $author = $this->getIO()->askAndValidate(
-            $output,
+            'Author [<comment>'.$author.'</comment>]: ',
            $dialog->getQuestion('Author', $author),
            function ($value) use ($self, $author) {
                $value = $value ?: $author;
                $author = $self->parseAuthorString($value);
                return sprintf('%s <%s>', $author['name'], $author['email']);
-            }
+            },
            null,
            $author
        );
        $input->setOption('author', $author);
-        $minimumStability = $input->getOption('stability') ?: '';
+        $minimumStability = $input->getOption('stability') ?: null;
-        $minimumStability = $dialog->askAndValidate(
+        $minimumStability = $this->getIO()->askAndValidate(
-            $output,
+            'Minimum Stability [<comment>'.$minimumStability.'</comment>]: ',
            $dialog->getQuestion('Minimum Stability', $minimumStability),
            function ($value) use ($self, $minimumStability) {
                if (null === $value) {
                    return $minimumStability;
@ -254,36 +244,65 @@ EOT
                }
                return $value;
-            }
+            },
            null,
            $minimumStability
        );
        $input->setOption('stability', $minimumStability);
        $type = $input->getOption('type') ?: false;
        $type = $this->getIO()->ask(
            'Package Type [<comment>'.$type.'</comment>]: ',
            $type
        );
        $input->setOption('type', $type);
        $license = $input->getOption('license') ?: false;
-        $license = $dialog->ask(
+        $license = $this->getIO()->ask(
-            $output,
+            'License [<comment>'.$license.'</comment>]: ',
            $dialog->getQuestion('License', $license),
            $license
        );
        $input->setOption('license', $license);
-        $output->writeln(array(
+        $this->getIO()->writeError(array('', 'Define your dependencies.', ''));
            '',
            'Define your dependencies.',
            ''
        ));
        $question = 'Would you like to define your dependencies (require) interactively [<comment>yes</comment>]? ';
        $requirements = array();
-        if ($dialog->askConfirmation($output, $dialog->getQuestion('Would you like to define your dependencies (require) interactively', 'yes', '?'), true)) {
+        if ($this->getIO()->askConfirmation($question, true)) {
            $requirements = $this->determineRequirements($input, $output, $input->getOption('require'));
        }
        $input->setOption('require', $requirements);
        $question = 'Would you like to define your dev dependencies (require-dev) interactively [<comment>yes</comment>]? ';
        $devRequirements = array();
-        if ($dialog->askConfirmation($output, $dialog->getQuestion('Would you like to define your dev dependencies (require-dev) interactively', 'yes', '?'), true)) {
+        if ($this->getIO()->askConfirmation($question, true)) {
            $devRequirements = $this->determineRequirements($input, $output, $input->getOption('require-dev'));
        }
        $input->setOption('require-dev', $devRequirements);
    }
    /**
     * @private
     * @param string $author
     * @return array
     */
    public function parseAuthorString($author)
    {
        if (preg_match('/^(?P<name>[- \.,\p{L}\p{N}\'’]+) <(?P<email>.+?)>$/u', $author, $match)) {
            if ($this->isValidEmail($match['email'])) {
                return array(
                    'name'  => trim($match['name']),
                    'email' => $match['email']
                );
            }
        }
        throw new \InvalidArgumentException(
            'Invalid author string.  Must be in the format: '.
            'John Smith <john@example.com>'
        );
    }
    protected function findPackages($name)
    {
        return $this->getRepos()->search($name);
@ -303,9 +322,6 @@ EOT
    protected function determineRequirements(InputInterface $input, OutputInterface $output, $requires = array())
    {
        $dialog = $this->getHelperSet()->get('dialog');
        $prompt = $dialog->getQuestion('Search for a package', false, ':');
        if ($requires) {
            $requires = $this->normalizeRequirements($requires);
            $result = array();
@ -316,7 +332,7 @@ EOT
                    $version = $this->findBestVersionForPackage($input, $requirement['name']);
                    $requirement['version'] = $version;
-                    $output->writeln(sprintf(
+                    $this->getIO()->writeError(sprintf(
                        'Using version <info>%s</info> for <info>%s</info>',
                        $requirement['version'],
                        $requirement['name']
@ -329,7 +345,8 @@ EOT
            return $result;
        }
-        while (null !== $package = $dialog->ask($output, $prompt)) {
+        $versionParser = new VersionParser();
        while (null !== $package = $this->getIO()->ask('Search for a package: ')) {
            $matches = $this->findPackages($package);
            if (count($matches)) {
@ -345,34 +362,49 @@ EOT
                // no match, prompt which to pick
                if (!$exactMatch) {
-                    $output->writeln(array(
+                    $this->getIO()->writeError(array(
                        '',
                        sprintf('Found <info>%s</info> packages matching <info>%s</info>', count($matches), $package),
                        ''
                    ));
-                    $output->writeln($choices);
+                    $this->getIO()->writeError($choices);
-                    $output->writeln('');
+                    $this->getIO()->writeError('');
-                    $validator = function ($selection) use ($matches) {
+                    $validator = function ($selection) use ($matches, $versionParser) {
                        if ('' === $selection) {
                            return false;
                        }
-                        if (!is_numeric($selection) && preg_match('{^\s*(\S+)\s+(\S.*)\s*$}', $selection, $matches)) {
+                        if (is_numeric($selection) && isset($matches[(int) $selection])) {
-                            return $matches[1].' '.$matches[2];
+                            $package = $matches[(int) $selection];
                            return $package['name'];
                        }
-                        if (!isset($matches[(int) $selection])) {
+                        if (preg_match('{^\s*(?P<name>[\S/]+)(?:\s+(?P<version>\S+))?\s*$}', $selection, $packageMatches)) {
-                            throw new \Exception('Not a valid selection');
+                            if (isset($packageMatches['version'])) {
                                // parsing `acme/example ~2.3`
                                // validate version constraint
                                $versionParser->parseConstraints($packageMatches['version']);
                                return $packageMatches['name'].' '.$packageMatches['version'];
                            }
                            // parsing `acme/example`
                            return $packageMatches['name'];
                        }
-                        $package = $matches[(int) $selection];
+                        throw new \Exception('Not a valid selection');
                        return $package['name'];
                    };
-                    $package = $dialog->askAndValidate($output, $dialog->getQuestion('Enter package # to add, or the complete package name if it is not listed', false, ':'), $validator, 3);
+                    $package = $this->getIO()->askAndValidate(
                        'Enter package # to add, or the complete package name if it is not listed: ',
                        $validator,
                        3,
                        false
                    );
                }
                // no constraint yet, determine the best version automatically
@ -383,16 +415,17 @@ EOT
                        return $input ?: false;
                    };
-                    $constraint = $dialog->askAndValidate(
+                    $constraint = $this->getIO()->askAndValidate(
-                        $output,
+                        'Enter the version constraint to require (or leave blank to use the latest version): ',
                        $dialog->getQuestion('Enter the version constraint to require (or leave blank to use the latest version)', false, ':'),
                        $validator,
-                        3)
+                        3,
-                    ;
+                        false
                    );
                    if (false === $constraint) {
                        $constraint = $this->findBestVersionForPackage($input, $package);
-                        $output->writeln(sprintf(
+                        $this->getIO()->writeError(sprintf(
                            'Using version <info>%s</info> for <info>%s</info>',
                            $constraint,
                            $package
@ -515,7 +548,7 @@ EOT
        }
        // php <5.3.3 has a very broken email validator, so bypass checks
-        if (version_compare(PHP_VERSION, '5.3.3', '<')) {
+        if (PHP_VERSION_ID < 50303) {
            return true;
        }
--- a/src/Composer/Command/InstallCommand.php
+++ b/src/Composer/Command/InstallCommand.php
@ -65,18 +65,18 @@ EOT
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        if ($args = $input->getArgument('packages')) {
-            $output->writeln('<error>Invalid argument '.implode(' ', $args).'. Use "composer require '.implode(' ', $args).'" instead to add packages to your composer.json.</error>');
+            $this->getIO()->writeError('<error>Invalid argument '.implode(' ', $args).'. Use "composer require '.implode(' ', $args).'" instead to add packages to your composer.json.</error>');
            return 1;
        }
        if ($input->getOption('no-custom-installers')) {
-            $output->writeln('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
+            $this->getIO()->writeError('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
            $input->setOption('no-plugins', true);
        }
        if ($input->getOption('dev')) {
-            $output->writeln('<warning>You are using the deprecated option "dev". Dev packages are installed by default now.</warning>');
+            $this->getIO()->writeError('<warning>You are using the deprecated option "dev". Dev packages are installed by default now.</warning>');
        }
        $composer = $this->getComposer(true, $input->getOption('no-plugins'));
--- a/src/Composer/Command/LicensesCommand.php
+++ b/src/Composer/Command/LicensesCommand.php
@ -18,7 +18,7 @@ use Composer\Plugin\CommandEvent;
 use Composer\Plugin\PluginEvents;
 use Composer\Package\PackageInterface;
 use Composer\Repository\RepositoryInterface;
-use Symfony\Component\Console\Helper\TableHelper;
+use Symfony\Component\Console\Helper\Table;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
@ -68,14 +68,17 @@ EOT
        switch ($format = $input->getOption('format')) {
            case 'text':
-                $output->writeln('Name: <comment>'.$root->getPrettyName().'</comment>');
+                $this->getIO()->write('Name: <comment>'.$root->getPrettyName().'</comment>');
-                $output->writeln('Version: <comment>'.$versionParser->formatVersion($root).'</comment>');
+                $this->getIO()->write('Version: <comment>'.$versionParser->formatVersion($root).'</comment>');
-                $output->writeln('Licenses: <comment>'.(implode(', ', $root->getLicense()) ?: 'none').'</comment>');
+                $this->getIO()->write('Licenses: <comment>'.(implode(', ', $root->getLicense()) ?: 'none').'</comment>');
-                $output->writeln('Dependencies:');
+                $this->getIO()->write('Dependencies:');
                $this->getIO()->write('');
-                $table = $this->getHelperSet()->get('table');
+                $table = new Table($output);
-                $table->setLayout(TableHelper::LAYOUT_BORDERLESS);
+                $table->setStyle('compact');
-                $table->setHorizontalBorderChar('');
+                $table->getStyle()->setVerticalBorderChar('');
                $table->getStyle()->setCellRowContentFormat('%s  ');
                $table->setHeaders(array('Name', 'Version', 'License'));
                foreach ($packages as $package) {
                    $table->addRow(array(
                        $package->getPrettyName(),
@ -83,7 +86,7 @@ EOT
                        implode(', ', $package->getLicense()) ?: 'none',
                    ));
                }
-                $table->render($output);
+                $table->render();
                break;
            case 'json':
@ -94,7 +97,7 @@ EOT
                    );
                }
-                $output->writeln(JsonFile::encode(array(
+                $this->getIO()->write(JsonFile::encode(array(
                    'name'         => $root->getPrettyName(),
                    'version'      => $versionParser->formatVersion($root),
                    'license'      => $root->getLicense(),
--- a/src/Composer/Command/RemoveCommand.php
+++ b/src/Composer/Command/RemoveCommand.php
@ -73,15 +73,14 @@ EOT
            if (isset($composer[$type][$package])) {
                $json->removeLink($type, $package);
            } elseif (isset($composer[$altType][$package])) {
-                $output->writeln('<warning>'.$package.' could not be found in '.$type.' but it is present in '.$altType.'</warning>');
+                $this->getIO()->writeError('<warning>'.$package.' could not be found in '.$type.' but it is present in '.$altType.'</warning>');
                $dialog = $this->getHelperSet()->get('dialog');
                if ($this->getIO()->isInteractive()) {
-                    if ($dialog->askConfirmation($output, $dialog->getQuestion('Do you want to remove it from '.$altType, 'yes', '?'), true)) {
+                    if ($this->getIO()->askConfirmation('Do you want to remove it from '.$altType.' [<comment>yes</comment>]? ', true)) {
                        $json->removeLink($altType, $package);
                    }
                }
            } else {
-                $output->writeln('<warning>'.$package.' is not required in your composer.json and has not been removed</warning>');
+                $this->getIO()->writeError('<warning>'.$package.' is not required in your composer.json and has not been removed</warning>');
            }
        }
@ -111,7 +110,7 @@ EOT
        $status = $install->run();
        if ($status !== 0) {
-            $output->writeln("\n".'<error>Removal failed, reverting '.$file.' to its original content.</error>');
+            $this->getIO()->writeError("\n".'<error>Removal failed, reverting '.$file.' to its original content.</error>');
            file_put_contents($jsonFile->getPath(), $composerBackup);
        }
--- a/src/Composer/Command/RequireCommand.php
+++ b/src/Composer/Command/RequireCommand.php
@ -67,21 +67,25 @@ EOT
        $newlyCreated = !file_exists($file);
        if (!file_exists($file) && !file_put_contents($file, "{\n}\n")) {
-            $output->writeln('<error>'.$file.' could not be created.</error>');
+            $this->getIO()->writeError('<error>'.$file.' could not be created.</error>');
            return 1;
        }
        if (!is_readable($file)) {
-            $output->writeln('<error>'.$file.' is not readable.</error>');
+            $this->getIO()->writeError('<error>'.$file.' is not readable.</error>');
            return 1;
        }
        if (!is_writable($file)) {
-            $output->writeln('<error>'.$file.' is not writable.</error>');
+            $this->getIO()->writeError('<error>'.$file.' is not writable.</error>');
            return 1;
        }
        if (filesize($file) === 0) {
            file_put_contents($file, "{\n}\n");
        }
        $json = new JsonFile($file);
        $composerDefinition = $json->read();
        $composerBackup = file_get_contents($json->getPath());
@ -122,7 +126,7 @@ EOT
            $json->write($composerDefinition);
        }
-        $output->writeln('<info>'.$file.' has been '.($newlyCreated ? 'created' : 'updated').'</info>');
+        $this->getIO()->writeError('<info>'.$file.' has been '.($newlyCreated ? 'created' : 'updated').'</info>');
        if ($input->getOption('no-update')) {
            return 0;
@ -154,10 +158,10 @@ EOT
        $status = $install->run();
        if ($status !== 0) {
            if ($newlyCreated) {
-                $output->writeln("\n".'<error>Installation failed, deleting '.$file.'.</error>');
+                $this->getIO()->writeError("\n".'<error>Installation failed, deleting '.$file.'.</error>');
                unlink($json->getPath());
            } else {
-                $output->writeln("\n".'<error>Installation failed, reverting '.$file.' to its original content.</error>');
+                $this->getIO()->writeError("\n".'<error>Installation failed, reverting '.$file.' to its original content.</error>');
                file_put_contents($json->getPath(), $composerBackup);
            }
        }
--- a/src/Composer/Command/RunScriptCommand.php
+++ b/src/Composer/Command/RunScriptCommand.php
@ -27,7 +27,7 @@ class RunScriptCommand extends Command
    /**
     * @var array Array with command events
     */
-    protected $commandEvents = array(
+    protected $scriptEvents = array(
        ScriptEvents::PRE_INSTALL_CMD,
        ScriptEvents::POST_INSTALL_CMD,
        ScriptEvents::PRE_UPDATE_CMD,
@ -35,17 +35,11 @@ class RunScriptCommand extends Command
        ScriptEvents::PRE_STATUS_CMD,
        ScriptEvents::POST_STATUS_CMD,
        ScriptEvents::POST_ROOT_PACKAGE_INSTALL,
-        ScriptEvents::POST_CREATE_PROJECT_CMD
+        ScriptEvents::POST_CREATE_PROJECT_CMD,
    );
    /**
     * @var array Array with script events
     */
    protected $scriptEvents = array(
        ScriptEvents::PRE_ARCHIVE_CMD,
        ScriptEvents::POST_ARCHIVE_CMD,
        ScriptEvents::PRE_AUTOLOAD_DUMP,
-        ScriptEvents::POST_AUTOLOAD_DUMP
+        ScriptEvents::POST_AUTOLOAD_DUMP,
    );
    protected function configure()
@ -54,10 +48,11 @@ class RunScriptCommand extends Command
            ->setName('run-script')
            ->setDescription('Run the scripts defined in composer.json.')
            ->setDefinition(array(
-                new InputArgument('script', InputArgument::REQUIRED, 'Script name to run.'),
+                new InputArgument('script', InputArgument::OPTIONAL, 'Script name to run.'),
                new InputArgument('args', InputArgument::IS_ARRAY | InputArgument::OPTIONAL, ''),
                new InputOption('dev', null, InputOption::VALUE_NONE, 'Sets the dev mode.'),
                new InputOption('no-dev', null, InputOption::VALUE_NONE, 'Disables the dev mode.'),
                new InputOption('list', 'l', InputOption::VALUE_NONE, 'List scripts.'),
            ))
            ->setHelp(<<<EOT
 The <info>run-script</info> command runs scripts defined in composer.json:
@ -70,8 +65,14 @@ EOT
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        if ($input->getOption('list')) {
            return $this->listScripts();
        } elseif (!$input->getArgument('script')) {
            throw new \RunTimeException('Missing required argument "script"');
        }
        $script = $input->getArgument('script');
-        if (!in_array($script, $this->commandEvents) && !in_array($script, $this->scriptEvents)) {
+        if (!in_array($script, $this->scriptEvents)) {
            if (defined('Composer\Script\ScriptEvents::'.str_replace('-', '_', strtoupper($script)))) {
                throw new \InvalidArgumentException(sprintf('Script "%s" cannot be run with this command', $script));
            }
@ -86,15 +87,28 @@ EOT
        // add the bin dir to the PATH to make local binaries of deps usable in scripts
        $binDir = $composer->getConfig()->get('bin-dir');
        if (is_dir($binDir)) {
-            putenv('PATH='.realpath($binDir).PATH_SEPARATOR.getenv('PATH'));
+            $_SERVER['PATH'] = realpath($binDir).PATH_SEPARATOR.getenv('PATH');
            putenv('PATH='.$_SERVER['PATH']);
        }
        $args = $input->getArgument('args');
        if (in_array($script, $this->commandEvents)) {
            return $composer->getEventDispatcher()->dispatchCommandEvent($script, $input->getOption('dev') || !$input->getOption('no-dev'), $args);
        }
        return $composer->getEventDispatcher()->dispatchScript($script, $input->getOption('dev') || !$input->getOption('no-dev'), $args);
    }
    protected function listScripts()
    {
        $scripts = $this->getComposer()->getPackage()->getScripts();
        if (!count($scripts)) {
            return 0;
        }
        $this->getIO()->writeError('<info>scripts:</info>');
        foreach ($scripts as $name => $script) {
            $this->getIO()->write('  ' . $name);
        }
        return 0;
    }
 }
--- a/src/Composer/Command/ScriptAliasCommand.php
+++ b/src/Composer/Command/ScriptAliasCommand.php
@ -57,7 +57,8 @@ EOT
        // add the bin dir to the PATH to make local binaries of deps usable in scripts
        $binDir = $composer->getConfig()->get('bin-dir');
        if (is_dir($binDir)) {
-            putenv('PATH='.realpath($binDir).PATH_SEPARATOR.getenv('PATH'));
+            $_SERVER['PATH'] = realpath($binDir).PATH_SEPARATOR.getenv('PATH');
            putenv('PATH='.$_SERVER['PATH']);
        }
        $args = $input->getArguments();
--- a/src/Composer/Command/SearchCommand.php
+++ b/src/Composer/Command/SearchCommand.php
@ -62,7 +62,7 @@ EOT
            $repos = new CompositeRepository(array_merge(array($installedRepo), $composer->getRepositoryManager()->getRepositories()));
        } else {
            $defaultRepos = Factory::createDefaultRepositories($this->getIO());
-            $output->writeln('No composer.json found in the current directory, showing packages from ' . implode(', ', array_keys($defaultRepos)));
+            $this->getIO()->writeError('No composer.json found in the current directory, showing packages from ' . implode(', ', array_keys($defaultRepos)));
            $installedRepo = $platformRepo;
            $repos = new CompositeRepository(array_merge(array($installedRepo), $defaultRepos));
        }
@ -78,7 +78,7 @@ EOT
        $results = $repos->search(implode(' ', $input->getArgument('tokens')), $flags);
        foreach ($results as $result) {
-            $output->writeln($result['name'] . (isset($result['description']) ? ' '. $result['description'] : ''));
+            $this->getIO()->write($result['name'] . (isset($result['description']) ? ' '. $result['description'] : ''));
        }
    }
 }
--- a/src/Composer/Command/SelfUpdateCommand.php
+++ b/src/Composer/Command/SelfUpdateCommand.php
@ -84,13 +84,13 @@ EOT
        $updateVersion = $input->getArgument('version') ?: $latestVersion;
        if (preg_match('{^[0-9a-f]{40}$}', $updateVersion) && $updateVersion !== $latestVersion) {
-            $output->writeln('<error>You can not update to a specific SHA-1 as those phars are not available for download</error>');
+            $this->getIO()->writeError('<error>You can not update to a specific SHA-1 as those phars are not available for download</error>');
            return 1;
        }
        if (Composer::VERSION === $updateVersion) {
-            $output->writeln('<info>You are already using composer version '.$updateVersion.'.</info>');
+            $this->getIO()->writeError('<info>You are already using composer version '.$updateVersion.'.</info>');
            return 0;
        }
@ -104,11 +104,11 @@ EOT
            self::OLD_INSTALL_EXT
        );
-        $output->writeln(sprintf("Updating to version <info>%s</info>.", $updateVersion));
+        $this->getIO()->writeError(sprintf("Updating to version <info>%s</info>.", $updateVersion));
        $remoteFilename = $baseUrl . (preg_match('{^[0-9a-f]{40}$}', $updateVersion) ? '/composer.phar' : "/download/{$updateVersion}/composer.phar");
        $remoteFilesystem->copy(self::HOMEPAGE, $remoteFilename, $tempFilename, !$input->getOption('no-progress'));
        if (!file_exists($tempFilename)) {
-            $output->writeln('<error>The download of the new composer version failed for an unexpected reason</error>');
+            $this->getIO()->writeError('<error>The download of the new composer version failed for an unexpected reason</error>');
            return 1;
        }
@ -120,22 +120,22 @@ EOT
            $fs = new Filesystem;
            foreach ($finder as $file) {
                $file = (string) $file;
-                $output->writeln('<info>Removing: '.$file.'</info>');
+                $this->getIO()->writeError('<info>Removing: '.$file.'</info>');
                $fs->remove($file);
            }
        }
        if ($err = $this->setLocalPhar($localFilename, $tempFilename, $backupFile)) {
-            $output->writeln('<error>The file is corrupted ('.$err->getMessage().').</error>');
+            $this->getIO()->writeError('<error>The file is corrupted ('.$err->getMessage().').</error>');
-            $output->writeln('<error>Please re-run the self-update command to try again.</error>');
+            $this->getIO()->writeError('<error>Please re-run the self-update command to try again.</error>');
            return 1;
        }
        if (file_exists($backupFile)) {
-            $output->writeln('Use <info>composer self-update --rollback</info> to return to version '.Composer::VERSION);
+            $this->getIO()->writeError('Use <info>composer self-update --rollback</info> to return to version '.Composer::VERSION);
        } else {
-            $output->writeln('<warning>A backup of the current version could not be written to '.$backupFile.', no rollback possible</warning>');
+            $this->getIO()->writeError('<warning>A backup of the current version could not be written to '.$backupFile.', no rollback possible</warning>');
        }
    }
@ -160,9 +160,9 @@ EOT
        }
        $oldFile = $rollbackDir . "/{$rollbackVersion}" . self::OLD_INSTALL_EXT;
-        $output->writeln(sprintf("Rolling back to version <info>%s</info>.", $rollbackVersion));
+        $this->getIO()->writeError(sprintf("Rolling back to version <info>%s</info>.", $rollbackVersion));
        if ($err = $this->setLocalPhar($localFilename, $oldFile)) {
-            $output->writeln('<error>The backup file was corrupted ('.$err->getMessage().') and has been removed.</error>');
+            $this->getIO()->writeError('<error>The backup file was corrupted ('.$err->getMessage().') and has been removed.</error>');
            return 1;
        }
--- a/src/Composer/Command/ShowCommand.php
+++ b/src/Composer/Command/ShowCommand.php
@ -28,6 +28,7 @@ use Composer\Repository\CompositeRepository;
 use Composer\Repository\ComposerRepository;
 use Composer\Repository\PlatformRepository;
 use Composer\Repository\RepositoryInterface;
 use Composer\Util\SpdxLicense;
 /**
 * @author Robert Schönthal <seroscho@googlemail.com>
@ -84,7 +85,7 @@ EOT
            } else {
                $defaultRepos = Factory::createDefaultRepositories($this->getIO());
                $repos = new CompositeRepository($defaultRepos);
-                $output->writeln('No composer.json found in the current directory, showing available packages from ' . implode(', ', array_keys($defaultRepos)));
+                $this->getIO()->writeError('No composer.json found in the current directory, showing available packages from ' . implode(', ', array_keys($defaultRepos)));
            }
        } elseif ($composer) {
            $localRepo = $composer->getRepositoryManager()->getLocalRepository();
@ -92,7 +93,7 @@ EOT
            $repos = new CompositeRepository(array_merge(array($installedRepo), $composer->getRepositoryManager()->getRepositories()));
        } else {
            $defaultRepos = Factory::createDefaultRepositories($this->getIO());
-            $output->writeln('No composer.json found in the current directory, showing available packages from ' . implode(', ', array_keys($defaultRepos)));
+            $this->getIO()->writeError('No composer.json found in the current directory, showing available packages from ' . implode(', ', array_keys($defaultRepos)));
            $installedRepo = $platformRepo;
            $repos = new CompositeRepository(array_merge(array($installedRepo), $defaultRepos));
        }
@ -115,18 +116,18 @@ EOT
                $versions = array($package->getPrettyVersion() => $package->getVersion());
            }
-            $this->printMeta($input, $output, $package, $versions, $installedRepo, $repos);
+            $this->printMeta($package, $versions, $installedRepo);
-            $this->printLinks($input, $output, $package, 'requires');
+            $this->printLinks($package, 'requires');
-            $this->printLinks($input, $output, $package, 'devRequires', 'requires (dev)');
+            $this->printLinks($package, 'devRequires', 'requires (dev)');
            if ($package->getSuggests()) {
-                $output->writeln("\n<info>suggests</info>");
+                $this->getIO()->write("\n<info>suggests</info>");
                foreach ($package->getSuggests() as $suggested => $reason) {
-                    $output->writeln($suggested . ' <comment>' . $reason . '</comment>');
+                    $this->getIO()->write($suggested . ' <comment>' . $reason . '</comment>');
                }
            }
-            $this->printLinks($input, $output, $package, 'provides');
+            $this->printLinks($package, 'provides');
-            $this->printLinks($input, $output, $package, 'conflicts');
+            $this->printLinks($package, 'conflicts');
-            $this->printLinks($input, $output, $package, 'replaces');
+            $this->printLinks($package, 'replaces');
            return;
        }
@ -172,7 +173,7 @@ EOT
        foreach (array('<info>platform</info>:' => true, '<comment>available</comment>:' => false, '<info>installed</info>:' => true) as $type => $showVersion) {
            if (isset($packages[$type])) {
                if ($tree) {
-                    $output->writeln($type);
+                    $this->getIO()->write($type);
                }
                ksort($packages[$type]);
@ -195,6 +196,11 @@ EOT
                    $width--;
                }
                if ($input->getOption('path') && null === $composer) {
                    $this->getIO()->writeError('No composer.json found in the current directory, disabling "path" option');
                    $input->setOption('path', false);
                }
                $writePath = !$input->getOption('name-only') && $input->getOption('path');
                $writeVersion = !$input->getOption('name-only') && !$input->getOption('path') && $showVersion && ($nameLength + $versionLength + 3 <= $width);
                $writeDescription = !$input->getOption('name-only') && !$input->getOption('path') && ($nameLength + ($showVersion ? $versionLength : 0) + 24 <= $width);
@ -222,10 +228,10 @@ EOT
                    } else {
                        $output->write($indent . $package);
                    }
-                    $output->writeln('');
+                    $this->getIO()->write('');
                }
                if ($tree) {
-                    $output->writeln('');
+                    $this->getIO()->write('');
                }
            }
        }
@ -272,9 +278,9 @@ EOT
            $matches[$index] = $package->getId();
        }
-        // select prefered package according to policy rules
+        // select preferred package according to policy rules
-        if (!$matchedPackage && $matches && $prefered = $policy->selectPreferedPackages($pool, array(), $matches)) {
+        if (!$matchedPackage && $matches && $preferred = $policy->selectPreferredPackages($pool, array(), $matches)) {
-            $matchedPackage = $pool->literalToPackage($prefered[0]);
+            $matchedPackage = $pool->literalToPackage($preferred[0]);
        }
        return array($matchedPackage, $versions);
@ -283,55 +289,55 @@ EOT
    /**
     * prints package meta data
     */
-    protected function printMeta(InputInterface $input, OutputInterface $output, CompletePackageInterface $package, array $versions, RepositoryInterface $installedRepo, RepositoryInterface $repos)
+    protected function printMeta(CompletePackageInterface $package, array $versions, RepositoryInterface $installedRepo)
    {
-        $output->writeln('<info>name</info>     : ' . $package->getPrettyName());
+        $this->getIO()->write('<info>name</info>     : ' . $package->getPrettyName());
-        $output->writeln('<info>descrip.</info> : ' . $package->getDescription());
+        $this->getIO()->write('<info>descrip.</info> : ' . $package->getDescription());
-        $output->writeln('<info>keywords</info> : ' . join(', ', $package->getKeywords() ?: array()));
+        $this->getIO()->write('<info>keywords</info> : ' . join(', ', $package->getKeywords() ?: array()));
-        $this->printVersions($input, $output, $package, $versions, $installedRepo, $repos);
+        $this->printVersions($package, $versions, $installedRepo);
-        $output->writeln('<info>type</info>     : ' . $package->getType());
+        $this->getIO()->write('<info>type</info>     : ' . $package->getType());
-        $output->writeln('<info>license</info>  : ' . implode(', ', $package->getLicense()));
+        $this->printLicenses($package);
-        $output->writeln('<info>source</info>   : ' . sprintf('[%s] <comment>%s</comment> %s', $package->getSourceType(), $package->getSourceUrl(), $package->getSourceReference()));
+        $this->getIO()->write('<info>source</info>   : ' . sprintf('[%s] <comment>%s</comment> %s', $package->getSourceType(), $package->getSourceUrl(), $package->getSourceReference()));
-        $output->writeln('<info>dist</info>     : ' . sprintf('[%s] <comment>%s</comment> %s', $package->getDistType(), $package->getDistUrl(), $package->getDistReference()));
+        $this->getIO()->write('<info>dist</info>     : ' . sprintf('[%s] <comment>%s</comment> %s', $package->getDistType(), $package->getDistUrl(), $package->getDistReference()));
-        $output->writeln('<info>names</info>    : ' . implode(', ', $package->getNames()));
+        $this->getIO()->write('<info>names</info>    : ' . implode(', ', $package->getNames()));
        if ($package->isAbandoned()) {
            $replacement = ($package->getReplacementPackage() !== null)
                ? ' The author suggests using the ' . $package->getReplacementPackage(). ' package instead.'
                : null;
-            $output->writeln(
+            $this->getIO()->writeError(
-                sprintf('<error>Attention: This package is abandoned and no longer maintained.%s</error>', $replacement)
+                sprintf('<warning>Attention: This package is abandoned and no longer maintained.%s</warning>', $replacement)
            );
        }
        if ($package->getSupport()) {
-            $output->writeln("\n<info>support</info>");
+            $this->getIO()->write("\n<info>support</info>");
            foreach ($package->getSupport() as $type => $value) {
-                $output->writeln('<comment>' . $type . '</comment> : '.$value);
+                $this->getIO()->write('<comment>' . $type . '</comment> : '.$value);
            }
        }
        if ($package->getAutoload()) {
-            $output->writeln("\n<info>autoload</info>");
+            $this->getIO()->write("\n<info>autoload</info>");
            foreach ($package->getAutoload() as $type => $autoloads) {
-                $output->writeln('<comment>' . $type . '</comment>');
+                $this->getIO()->write('<comment>' . $type . '</comment>');
                if ($type === 'psr-0') {
                    foreach ($autoloads as $name => $path) {
-                        $output->writeln(($name ?: '*') . ' => ' . (is_array($path) ? implode(', ', $path) : ($path ?: '.')));
+                        $this->getIO()->write(($name ?: '*') . ' => ' . (is_array($path) ? implode(', ', $path) : ($path ?: '.')));
                    }
                } elseif ($type === 'psr-4') {
                    foreach ($autoloads as $name => $path) {
-                        $output->writeln(($name ?: '*') . ' => ' . (is_array($path) ? implode(', ', $path) : ($path ?: '.')));
+                        $this->getIO()->write(($name ?: '*') . ' => ' . (is_array($path) ? implode(', ', $path) : ($path ?: '.')));
                    }
                } elseif ($type === 'classmap') {
-                    $output->writeln(implode(', ', $autoloads));
+                    $this->getIO()->write(implode(', ', $autoloads));
                }
            }
            if ($package->getIncludePaths()) {
-                $output->writeln('<comment>include-path</comment>');
+                $this->getIO()->write('<comment>include-path</comment>');
-                $output->writeln(implode(', ', $package->getIncludePaths()));
+                $this->getIO()->write(implode(', ', $package->getIncludePaths()));
            }
        }
    }
@ -339,7 +345,7 @@ EOT
    /**
     * prints all available versions of this package and highlights the installed one if any
     */
-    protected function printVersions(InputInterface $input, OutputInterface $output, CompletePackageInterface $package, array $versions, RepositoryInterface $installedRepo, RepositoryInterface $repos)
+    protected function printVersions(CompletePackageInterface $package, array $versions, RepositoryInterface $installedRepo)
    {
        uasort($versions, 'version_compare');
        $versions = array_keys(array_reverse($versions));
@ -355,27 +361,54 @@ EOT
        $versions = implode(', ', $versions);
-        $output->writeln('<info>versions</info> : ' . $versions);
+        $this->getIO()->write('<info>versions</info> : ' . $versions);
    }
    /**
     * print link objects
     *
     * @param InputInterface           $input
     * @param OutputInterface          $output
     * @param CompletePackageInterface $package
     * @param string                   $linkType
     * @param string                   $title
     */
-    protected function printLinks(InputInterface $input, OutputInterface $output, CompletePackageInterface $package, $linkType, $title = null)
+    protected function printLinks(CompletePackageInterface $package, $linkType, $title = null)
    {
        $title = $title ?: $linkType;
        if ($links = $package->{'get'.ucfirst($linkType)}()) {
-            $output->writeln("\n<info>" . $title . "</info>");
+            $this->getIO()->write("\n<info>" . $title . "</info>");
            foreach ($links as $link) {
-                $output->writeln($link->getTarget() . ' <comment>' . $link->getPrettyConstraint() . '</comment>');
+                $this->getIO()->write($link->getTarget() . ' <comment>' . $link->getPrettyConstraint() . '</comment>');
            }
        }
    }
    /**
     * Prints the licenses of a package with metadata
     *
     * @param CompletePackageInterface $package
     */
    protected function printLicenses(CompletePackageInterface $package)
    {
        $spdxLicense = new SpdxLicense;
        $licenses = $package->getLicense();
        foreach ($licenses as $licenseId) {
            $license = $spdxLicense->getLicenseByIdentifier($licenseId); // keys: 0 fullname, 1 osi, 2 url
            if (!$license) {
                $out = $licenseId;
            } else {
                // is license OSI approved?
                if ($license[1] === true) {
                    $out = sprintf('%s (%s) (OSI approved) %s', $license[0], $licenseId, $license[2]);
                } else {
                    $out = sprintf('%s (%s) %s', $license[0], $licenseId, $license[2]);
                }
            }
            $this->getIO()->write('<info>license</info>  : ' . $out);
        }
    }
 }
--- a/src/Composer/Command/StatusCommand.php
+++ b/src/Composer/Command/StatusCommand.php
@ -57,7 +57,7 @@ EOT
        $im = $composer->getInstallationManager();
        // Dispatch pre-status-command
-        $composer->getEventDispatcher()->dispatchCommandEvent(ScriptEvents::PRE_STATUS_CMD, true);
+        $composer->getEventDispatcher()->dispatchScript(ScriptEvents::PRE_STATUS_CMD, true);
        $errors = array();
@ -76,9 +76,9 @@ EOT
        // output errors/warnings
        if (!$errors) {
-            $output->writeln('<info>No local changes</info>');
+            $this->getIO()->writeError('<info>No local changes</info>');
        } else {
-            $output->writeln('<error>You have changes in the following dependencies:</error>');
+            $this->getIO()->writeError('<error>You have changes in the following dependencies:</error>');
        }
        foreach ($errors as $path => $changes) {
@ -86,19 +86,19 @@ EOT
                $indentedChanges = implode("\n", array_map(function ($line) {
                    return '    ' . ltrim($line);
                }, explode("\n", $changes)));
-                $output->writeln('<info>'.$path.'</info>:');
+                $this->getIO()->write('<info>'.$path.'</info>:');
-                $output->writeln($indentedChanges);
+                $this->getIO()->write($indentedChanges);
            } else {
-                $output->writeln($path);
+                $this->getIO()->write($path);
            }
        }
        if ($errors && !$input->getOption('verbose')) {
-            $output->writeln('Use --verbose (-v) to see modified files');
+            $this->getIO()->writeError('Use --verbose (-v) to see modified files');
        }
        // Dispatch post-status-command
-        $composer->getEventDispatcher()->dispatchCommandEvent(ScriptEvents::POST_STATUS_CMD, true);
+        $composer->getEventDispatcher()->dispatchScript(ScriptEvents::POST_STATUS_CMD, true);
        return $errors ? 1 : 0;
    }
--- a/src/Composer/Command/UpdateCommand.php
+++ b/src/Composer/Command/UpdateCommand.php
@ -75,12 +75,12 @@ EOT
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        if ($input->getOption('no-custom-installers')) {
-            $output->writeln('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
+            $this->getIO()->writeError('<warning>You are using the deprecated option "no-custom-installers". Use "no-plugins" instead.</warning>');
            $input->setOption('no-plugins', true);
        }
        if ($input->getOption('dev')) {
-            $output->writeln('<warning>You are using the deprecated option "dev". Dev packages are installed by default now.</warning>');
+            $this->getIO()->writeError('<warning>You are using the deprecated option "dev". Dev packages are installed by default now.</warning>');
        }
        $composer = $this->getComposer(true, $input->getOption('no-plugins'));
--- a/src/Composer/Command/ValidateCommand.php
+++ b/src/Composer/Command/ValidateCommand.php
@ -37,6 +37,7 @@ class ValidateCommand extends Command
            ->setDescription('Validates a composer.json')
            ->setDefinition(array(
                new InputOption('no-check-all', null, InputOption::VALUE_NONE, 'Do not make a complete validation'),
                new InputOption('no-check-publish', null, InputOption::VALUE_NONE, 'Do not check for publish errors'),
                new InputArgument('file', InputArgument::OPTIONAL, 'path to composer.json file', './composer.json')
            ))
            ->setHelp(<<<EOT
@ -57,45 +58,53 @@ EOT
        $file = $input->getArgument('file');
        if (!file_exists($file)) {
-            $output->writeln('<error>' . $file . ' not found.</error>');
+            $this->getIO()->writeError('<error>' . $file . ' not found.</error>');
            return 1;
        }
        if (!is_readable($file)) {
-            $output->writeln('<error>' . $file . ' is not readable.</error>');
+            $this->getIO()->writeError('<error>' . $file . ' is not readable.</error>');
            return 1;
        }
        $validator = new ConfigValidator($this->getIO());
        $checkAll = $input->getOption('no-check-all') ? 0 : ValidatingArrayLoader::CHECK_ALL;
        $checkPublish = !$input->getOption('no-check-publish');
        list($errors, $publishErrors, $warnings) = $validator->validate($file, $checkAll);
        // output errors/warnings
        if (!$errors && !$publishErrors && !$warnings) {
-            $output->writeln('<info>' . $file . ' is valid</info>');
+            $this->getIO()->write('<info>' . $file . ' is valid</info>');
        } elseif (!$errors && !$publishErrors) {
-            $output->writeln('<info>' . $file . ' is valid, but with a few warnings</info>');
+            $this->getIO()->writeError('<info>' . $file . ' is valid, but with a few warnings</info>');
-            $output->writeln('<warning>See http://getcomposer.org/doc/04-schema.md for details on the schema</warning>');
+            $this->getIO()->writeError('<warning>See https://getcomposer.org/doc/04-schema.md for details on the schema</warning>');
        } elseif (!$errors) {
-            $output->writeln('<info>' . $file . ' is valid for simple usage with composer but has</info>');
+            $this->getIO()->writeError('<info>' . $file . ' is valid for simple usage with composer but has</info>');
-            $output->writeln('<info>strict errors that make it unable to be published as a package:</info>');
+            $this->getIO()->writeError('<info>strict errors that make it unable to be published as a package:</info>');
-            $output->writeln('<warning>See http://getcomposer.org/doc/04-schema.md for details on the schema</warning>');
+            $this->getIO()->writeError('<warning>See https://getcomposer.org/doc/04-schema.md for details on the schema</warning>');
        } else {
-            $output->writeln('<error>' . $file . ' is invalid, the following errors/warnings were found:</error>');
+            $this->getIO()->writeError('<error>' . $file . ' is invalid, the following errors/warnings were found:</error>');
        }
        $messages = array(
-            'error' => array_merge($errors, $publishErrors),
+            'error' => $errors,
            'warning' => $warnings,
        );
        // If checking publish errors, display them errors, otherwise just show them as warnings
        if ($checkPublish) {
            $messages['error'] = array_merge($messages['error'], $publishErrors);
        } else {
            $messages['warning'] = array_merge($messages['warning'], $publishErrors);
        }
        foreach ($messages as $style => $msgs) {
            foreach ($msgs as $msg) {
-                $output->writeln('<' . $style . '>' . $msg . '</' . $style . '>');
+                $this->getIO()->writeError('<' . $style . '>' . $msg . '</' . $style . '>');
            }
        }
-        return $errors || $publishErrors ? 1 : 0;
+        return $errors || ($publishErrors && $checkPublish) ? 1 : 0;
    }
 }
--- a/src/Composer/Compiler.php
+++ b/src/Composer/Compiler.php
@ -15,6 +15,7 @@ namespace Composer;
 use Composer\Json\JsonFile;
 use Symfony\Component\Finder\Finder;
 use Symfony\Component\Process\Process;
 use Seld\PharUtils\Timestamps;
 /**
 * The Compiler class compiles composer into a phar
@ -51,9 +52,8 @@ class Compiler
            throw new \RuntimeException('Can\'t run git log. You must ensure to run compile from composer git repository clone and that git binary is available.');
        }
-        $date = new \DateTime(trim($process->getOutput()));
+        $this->versionDate = new \DateTime(trim($process->getOutput()));
-        $date->setTimezone(new \DateTimeZone('UTC'));
+        $this->versionDate->setTimezone(new \DateTimeZone('UTC'));
        $this->versionDate = $date->format('Y-m-d H:i:s');
        $process = new Process('git describe --tags --exact-match HEAD');
        if ($process->run() == 0) {
@ -73,6 +73,10 @@ class Compiler
        $phar->startBuffering();
        $finderSort = function ($a, $b) {
            return strcmp(strtr($a->getRealPath(), '\\', '/'), strtr($b->getRealPath(), '\\', '/'));
        };
        $finder = new Finder();
        $finder->files()
            ->ignoreVCS(true)
@ -80,6 +84,7 @@ class Compiler
            ->notName('Compiler.php')
            ->notName('ClassLoader.php')
            ->in(__DIR__.'/..')
            ->sort($finderSort)
        ;
        foreach ($finder as $file) {
@ -91,21 +96,27 @@ class Compiler
        $finder->files()
            ->name('*.json')
            ->in(__DIR__ . '/../../res')
            ->sort($finderSort)
        ;
        foreach ($finder as $file) {
            $this->addFile($phar, $file, false);
        }
-        $this->addFile($phar, new \SplFileInfo(__DIR__ . '/../../src/Composer/IO/hiddeninput.exe'), false);
+        $this->addFile($phar, new \SplFileInfo(__DIR__ . '/../../vendor/seld/cli-prompt/res/hiddeninput.exe'), false);
        $finder = new Finder();
        $finder->files()
            ->ignoreVCS(true)
            ->name('*.php')
            ->name('LICENSE')
            ->exclude('Tests')
            ->exclude('tests')
            ->exclude('docs')
            ->in(__DIR__.'/../../vendor/symfony/')
-            ->in(__DIR__.'/../../vendor/seld/jsonlint/src/')
+            ->in(__DIR__.'/../../vendor/seld/jsonlint/')
-            ->in(__DIR__.'/../../vendor/justinrainbow/json-schema/src/')
+            ->in(__DIR__.'/../../vendor/seld/cli-prompt/')
            ->in(__DIR__.'/../../vendor/justinrainbow/json-schema/')
            ->sort($finderSort)
        ;
        foreach ($finder as $file) {
@ -134,6 +145,11 @@ class Compiler
        $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../LICENSE'), false);
        unset($phar);
        // re-sign the phar with reproducible timestamp / signature
        $util = new Timestamps($pharFile);
        $util->updateTimestamps($this->versionDate);
        $util->save($pharFile, \Phar::SHA1);
    }
    private function addFile($phar, $file, $strip = true)
@ -150,7 +166,7 @@ class Compiler
        if ($path === 'src/Composer/Composer.php') {
            $content = str_replace('@package_version@', $this->version, $content);
            $content = str_replace('@package_branch_alias_version@', $this->branchAliasVersion, $content);
-            $content = str_replace('@release_date@', $this->versionDate, $content);
+            $content = str_replace('@release_date@', $this->versionDate->format('Y-m-d H:i:s'), $content);
        }
        $phar->addFromString($path, $content);
@ -226,9 +242,9 @@ Phar::mapPhar('composer.phar');
 EOF;
-        // add warning once the phar is older than 30 days
+        // add warning once the phar is older than 60 days
        if (preg_match('{^[a-f0-9]+$}', $this->version)) {
-            $warningTime = time() + 30*86400;
+            $warningTime = $this->versionDate->format('U') + 60 * 86400;
            $stub .= "define('COMPOSER_DEV_WARNING_TIME', $warningTime);\n";
        }
--- a/src/Composer/Config.php
+++ b/src/Composer/Config.php
@ -13,6 +13,7 @@
 namespace Composer;
 use Composer\Config\ConfigSourceInterface;
 use Composer\Plugin\PluginInterface;
 /**
 * @author Jordi Boggiano <j.boggiano@seld.be>
@ -45,6 +46,9 @@ class Config
        'github-domains' => array('github.com'),
        'github-expose-hostname' => true,
        'store-auths' => 'prompt',
        'platform' => array(),
        'archive-format' => 'tar',
        'archive-dir' => '.',
        // valid keys without defaults (auth config stuff):
        // github-oauth
        // http-basic
--- a/src/Composer/Config/JsonConfigSource.php
+++ b/src/Composer/Config/JsonConfigSource.php
@ -79,7 +79,7 @@ class JsonConfigSource implements ConfigSourceInterface
    public function addConfigSetting($name, $value)
    {
        $this->manipulateJson('addConfigSetting', $name, $value, function (&$config, $key, $val) {
-            if ($key === 'github-oauth' || $key === 'http-basic') {
+            if (preg_match('{^(github-oauth|http-basic|platform)\.}', $key)) {
                list($key, $host) = explode('.', $key, 2);
                if ($this->authConfig) {
                    $config[$key][$host] = $val;
@ -98,7 +98,7 @@ class JsonConfigSource implements ConfigSourceInterface
    public function removeConfigSetting($name)
    {
        $this->manipulateJson('removeConfigSetting', $name, function (&$config, $key) {
-            if ($key === 'github-oauth' || $key === 'http-basic') {
+            if (preg_match('{^(github-oauth|http-basic|platform)\.}', $key)) {
                list($key, $host) = explode('.', $key, 2);
                if ($this->authConfig) {
                    unset($config[$key][$host]);
--- a/src/Composer/Console/Application.php
+++ b/src/Composer/Console/Application.php
@ -15,11 +15,11 @@ namespace Composer\Console;
 use Symfony\Component\Console\Application as BaseApplication;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Output\ConsoleOutput;
 use Symfony\Component\Console\Formatter\OutputFormatter;
 use Composer\Command;
 use Composer\Command\Helper\DialogHelper;
 use Composer\Composer;
 use Composer\Factory;
 use Composer\IO\IOInterface;
@ -65,7 +65,6 @@ class Application extends BaseApplication
            date_default_timezone_set(@date_default_timezone_get());
        }
        ErrorHandler::register();
        parent::__construct('Composer', Composer::VERSION);
    }
@ -89,9 +88,10 @@ class Application extends BaseApplication
    public function doRun(InputInterface $input, OutputInterface $output)
    {
        $this->io = new ConsoleIO($input, $output, $this->getHelperSet());
        ErrorHandler::register($this->io);
-        if (version_compare(PHP_VERSION, '5.3.2', '<')) {
+        if (PHP_VERSION_ID < 50302) {
-            $output->writeln('<warning>Composer only officially supports PHP 5.3.2 and above, you will most likely encounter problems with your PHP '.PHP_VERSION.', upgrading is strongly recommended.</warning>');
+            $this->getIO()->writeError('<warning>Composer only officially supports PHP 5.3.2 and above, you will most likely encounter problems with your PHP '.PHP_VERSION.', upgrading is strongly recommended.</warning>');
        }
        if (defined('COMPOSER_DEV_WARNING_TIME')) {
@ -104,7 +104,7 @@ class Application extends BaseApplication
            }
            if ($commandName !== 'self-update' && $commandName !== 'selfupdate') {
                if (time() > COMPOSER_DEV_WARNING_TIME) {
-                    $output->writeln(sprintf('<warning>Warning: This development build of composer is over 30 days old. It is recommended to update it by running "%s self-update" to get the latest version.</warning>', $_SERVER['PHP_SELF']));
+                    $this->getIO()->writeError(sprintf('<warning>Warning: This development build of composer is over 60 days old. It is recommended to update it by running "%s self-update" to get the latest version.</warning>', $_SERVER['PHP_SELF']));
                }
            }
        }
@ -117,8 +117,8 @@ class Application extends BaseApplication
        if ($newWorkDir = $this->getNewWorkingDir($input)) {
            $oldWorkingDir = getcwd();
            chdir($newWorkDir);
-            if ($output->getVerbosity() >= 4) {
+            if ($this->getIO()->isDebug() >= 4) {
-                $output->writeln('Changed CWD to ' . getcwd());
+                $this->getIO()->writeError('Changed CWD to ' . getcwd());
            }
        }
@ -129,7 +129,7 @@ class Application extends BaseApplication
                foreach ($composer['scripts'] as $script => $dummy) {
                    if (!defined('Composer\Script\ScriptEvents::'.str_replace('-', '_', strtoupper($script)))) {
                        if ($this->has($script)) {
-                            $output->writeln('<warning>A script named '.$script.' would override a native Composer function and has been skipped</warning>');
+                            $this->getIO()->writeError('<warning>A script named '.$script.' would override a native Composer function and has been skipped</warning>');
                        } else {
                            $this->add(new Command\ScriptAliasCommand($script));
                        }
@ -150,7 +150,7 @@ class Application extends BaseApplication
        }
        if (isset($startTime)) {
-            $output->writeln('<info>Memory usage: '.round(memory_get_usage() / 1024 / 1024, 2).'MB (peak: '.round(memory_get_peak_usage() / 1024 / 1024, 2).'MB), time: '.round(microtime(true) - $startTime, 2).'s');
+            $this->getIO()->writeError('<info>Memory usage: '.round(memory_get_usage() / 1024 / 1024, 2).'MB (peak: '.round(memory_get_peak_usage() / 1024 / 1024, 2).'MB), time: '.round(microtime(true) - $startTime, 2).'s');
        }
        return $result;
@ -186,23 +186,27 @@ class Application extends BaseApplication
                    || (($df = @disk_free_space($dir = $config->get('vendor-dir'))) !== false && $df < $minSpaceFree)
                    || (($df = @disk_free_space($dir = sys_get_temp_dir())) !== false && $df < $minSpaceFree)
                ) {
-                    $output->writeln('<error>The disk hosting '.$dir.' is full, this may be the cause of the following exception</error>');
+                    $this->getIO()->writeError('<error>The disk hosting '.$dir.' is full, this may be the cause of the following exception</error>');
                }
            }
        } catch (\Exception $e) {
        }
        if (defined('PHP_WINDOWS_VERSION_BUILD') && false !== strpos($exception->getMessage(), 'The system cannot find the path specified')) {
-            $output->writeln('<error>The following exception may be caused by a stale entry in your cmd.exe AutoRun</error>');
+            $this->getIO()->writeError('<error>The following exception may be caused by a stale entry in your cmd.exe AutoRun</error>');
-            $output->writeln('<error>Check https://getcomposer.org/doc/articles/troubleshooting.md#-the-system-cannot-find-the-path-specified-windows- for details</error>');
+            $this->getIO()->writeError('<error>Check https://getcomposer.org/doc/articles/troubleshooting.md#-the-system-cannot-find-the-path-specified-windows- for details</error>');
        }
        if (false !== strpos($exception->getMessage(), 'fork failed - Cannot allocate memory')) {
-            $output->writeln('<error>The following exception is caused by a lack of memory and not having swap configured</error>');
+            $this->getIO()->writeError('<error>The following exception is caused by a lack of memory and not having swap configured</error>');
-            $output->writeln('<error>Check https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors for details</error>');
+            $this->getIO()->writeError('<error>Check https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors for details</error>');
        }
-        return parent::renderException($exception, $output);
+        if ($output instanceof ConsoleOutputInterface) {
            parent::renderException($exception, $output->getErrorOutput());
        } else {
            parent::renderException($exception, $output);
        }
    }
    /**
@ -218,7 +222,7 @@ class Application extends BaseApplication
                $this->composer = Factory::create($this->io, null, $disablePlugins);
            } catch (\InvalidArgumentException $e) {
                if ($required) {
-                    $this->io->write($e->getMessage());
+                    $this->io->writeError($e->getMessage());
                    exit(1);
                }
            } catch (JsonValidationException $e) {
@ -316,16 +320,4 @@ class Application extends BaseApplication
        return $definition;
    }
    /**
     * {@inheritDoc}
     */
    protected function getDefaultHelperSet()
    {
        $helperSet = parent::getDefaultHelperSet();
        $helperSet->set(new DialogHelper());
        return $helperSet;
    }
 }
--- a/src/Composer/Console/HtmlOutputFormatter.php
+++ b/src/Composer/Console/HtmlOutputFormatter.php
@ -59,7 +59,8 @@ class HtmlOutputFormatter extends OutputFormatter
    {
        $formatted = parent::format($message);
-        return preg_replace_callback("{\033\[([0-9;]+)m(.*?)\033\[0m}s", array($this, 'formatHtml'), $formatted);
+        $clearEscapeCodes = '(?:39|49|0|22|24|25|27|28)';
        return preg_replace_callback("{\033\[([0-9;]+)m(.*?)\033\[(?:".$clearEscapeCodes.";)*?".$clearEscapeCodes."m}s", array($this, 'formatHtml'), $formatted);
    }
    private function formatHtml($matches)
@ -83,6 +84,6 @@ class HtmlOutputFormatter extends OutputFormatter
            }
        }
-        return $out . '">'.$matches[2].'</span>';
+        return $out.'">'.$matches[2].'</span>';
    }
 }
--- a/src/Composer/DependencyResolver/DefaultPolicy.php
+++ b/src/Composer/DependencyResolver/DefaultPolicy.php
@ -62,7 +62,15 @@ class DefaultPolicy implements PolicyInterface
        return $pool->getPriority($package->getRepository());
    }
    /**
     * @deprecated Method has been renamed to selectPreferredPackages, you should update usages
     */
    public function selectPreferedPackages(Pool $pool, array $installedMap, array $literals, $requiredPackage = null)
    {
        return $this->selectPreferredPackages($pool, $installedMap, $literals, $requiredPackage);
    }
    public function selectPreferredPackages(Pool $pool, array $installedMap, array $literals, $requiredPackage = null)
    {
        $packages = $this->groupLiteralsByNamePreferInstalled($pool, $installedMap, $literals);
@ -74,10 +82,10 @@ class DefaultPolicy implements PolicyInterface
        }
        foreach ($packages as &$literals) {
            $literals = $this->pruneToBestVersion($pool, $literals);
            $literals = $this->pruneToHighestPriorityOrInstalled($pool, $installedMap, $literals);
            $literals = $this->pruneToBestVersion($pool, $literals);
            $literals = $this->pruneRemoteAliases($pool, $literals);
        }
--- a/src/Composer/DependencyResolver/PolicyInterface.php
+++ b/src/Composer/DependencyResolver/PolicyInterface.php
@ -21,5 +21,5 @@ interface PolicyInterface
 {
    public function versionCompare(PackageInterface $a, PackageInterface $b, $operator);
    public function findUpdatePackages(Pool $pool, array $installedMap, PackageInterface $package);
-    public function selectPreferedPackages(Pool $pool, array $installedMap, array $literals);
+    public function selectPreferredPackages(Pool $pool, array $installedMap, array $literals);
 }
--- a/src/Composer/DependencyResolver/Pool.php
+++ b/src/Composer/DependencyResolver/Pool.php
@ -55,7 +55,6 @@ class Pool
    public function __construct($minimumStability = 'stable', array $stabilityFlags = array(), array $filterRequires = array())
    {
        $stabilities = BasePackage::$stabilities;
        $this->versionParser = new VersionParser;
        $this->acceptableStabilities = array();
        foreach (BasePackage::$stabilities as $stability => $value) {
@ -65,6 +64,11 @@ class Pool
        }
        $this->stabilityFlags = $stabilityFlags;
        $this->filterRequires = $filterRequires;
        foreach ($filterRequires as $name => $constraint) {
            if (preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $name)) {
                unset($this->filterRequires[$name]);
            }
        }
    }
    public function setWhitelist($whitelist)
--- a/src/Composer/DependencyResolver/Problem.php
+++ b/src/Composer/DependencyResolver/Problem.php
@ -87,6 +87,19 @@ class Problem
            }
            if ($job && $job['cmd'] === 'install' && empty($packages)) {
                // handle php/hhvm
                if ($job['packageName'] === 'php' || $job['packageName'] === 'php-64bit' || $job['packageName'] === 'hhvm') {
                    $msg = "\n    - This package requires ".$job['packageName'].$this->constraintToText($job['constraint']).' but ';
                    if (defined('HHVM_VERSION')) {
                        return $msg . 'your HHVM version does not satisfy that requirement.';
                    } elseif ($job['packageName'] === 'hhvm') {
                        return $msg . 'you are running this with PHP and not HHVM.';
                    }
                    return $msg . 'your PHP version ('.  phpversion().') does not satisfy that requirement.';
                }
                // handle php extensions
                if (0 === stripos($job['packageName'], 'ext-')) {
                    $ext = substr($job['packageName'], 4);
--- a/src/Composer/DependencyResolver/Request.php
+++ b/src/Composer/DependencyResolver/Request.php
@ -20,11 +20,9 @@ use Composer\Package\LinkConstraint\LinkConstraintInterface;
 class Request
 {
    protected $jobs;
    protected $pool;
-    public function __construct(Pool $pool)
+    public function __construct()
    {
        $this->pool = $pool;
        $this->jobs = array();
    }
--- a/src/Composer/DependencyResolver/Rule.php
+++ b/src/Composer/DependencyResolver/Rule.php
@ -217,7 +217,15 @@ class Rule
                    $targetName = $this->reasonData->getTarget();
                    // handle php extensions
-                    if (0 === strpos($targetName, 'ext-')) {
+                    if ($targetName === 'php' || $targetName === 'php-64bit' || $targetName === 'hhvm') {
                        if (defined('HHVM_VERSION')) {
                            $text .= ' -> your HHVM version does not satisfy that requirement.';
                        } elseif ($targetName === 'hhvm') {
                            $text .= ' -> you are running this with PHP and not HHVM.';
                        } else {
                            $text .= ' -> your PHP version ('.  phpversion().') does not satisfy that requirement.';
                        }
                    } elseif (0 === strpos($targetName, 'ext-')) {
                        $ext = substr($targetName, 4);
                        $error = extension_loaded($ext) ? 'has the wrong version ('.(phpversion($ext) ?: '0').') installed' : 'is missing from your system';
--- a/src/Composer/DependencyResolver/Solver.php
+++ b/src/Composer/DependencyResolver/Solver.php
@ -40,6 +40,7 @@ class Solver
    protected $branches = array();
    protected $problems = array();
    protected $learnedPool = array();
    protected $learnedWhy = array();
    public function __construct(PolicyInterface $policy, Pool $pool, RepositoryInterface $installed)
    {
@ -328,7 +329,7 @@ class Solver
    private function selectAndInstall($level, array $decisionQueue, $disableRules, Rule $rule)
    {
        // choose best package to install from decisionQueue
-        $literals = $this->policy->selectPreferedPackages($this->pool, $this->installedMap, $decisionQueue, $rule->getRequiredPackage());
+        $literals = $this->policy->selectPreferredPackages($this->pool, $this->installedMap, $decisionQueue, $rule->getRequiredPackage());
        $selectedLiteral = array_shift($literals);
--- a/src/Composer/DependencyResolver/SolverProblemsException.php
+++ b/src/Composer/DependencyResolver/SolverProblemsException.php
@ -36,7 +36,7 @@ class SolverProblemsException extends \RuntimeException
        }
        if (strpos($text, 'could not be found') || strpos($text, 'no matching package found')) {
-            $text .= "\nPotential causes:\n - A typo in the package name\n - The package is not available in a stable-enough version according to your minimum-stability setting\n   see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.\n\nRead <http://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.";
+            $text .= "\nPotential causes:\n - A typo in the package name\n - The package is not available in a stable-enough version according to your minimum-stability setting\n   see <https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion> for more details.\n\nRead <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.";
        }
        return $text;
--- a/src/Composer/Downloader/ArchiveDownloader.php
+++ b/src/Composer/Downloader/ArchiveDownloader.php
@ -35,7 +35,7 @@ abstract class ArchiveDownloader extends FileDownloader
            $fileName = parent::download($package, $path);
            if ($this->io->isVerbose()) {
-                $this->io->write('    Extracting archive');
+                $this->io->writeError('    Extracting archive');
            }
            try {
@ -77,7 +77,7 @@ abstract class ArchiveDownloader extends FileDownloader
                // retry downloading if we have an invalid zip file
                if ($retries && $e instanceof \UnexpectedValueException && class_exists('ZipArchive') && $e->getCode() === \ZipArchive::ER_NOZIP) {
-                    $this->io->write('    Invalid zip file, retrying...');
+                    $this->io->writeError('    Invalid zip file, retrying...');
                    usleep(500000);
                    continue;
                }
@ -88,7 +88,7 @@ abstract class ArchiveDownloader extends FileDownloader
            break;
        }
-        $this->io->write('');
+        $this->io->writeError('');
    }
    /**
@ -115,10 +115,11 @@ abstract class ArchiveDownloader extends FileDownloader
                // update api archives to the proper reference
                $url = 'https://api.github.com/repos/' . $match[1] . '/'. $match[2] . '/' . $match[3] . 'ball/' . $package->getDistReference();
            }
-        }
+        } else if ($package->getDistReference() && strpos($url, 'bitbucket.org')) {
-
+            if (preg_match('{^https?://(?:www\.)?bitbucket\.org/([^/]+)/([^/]+)/get/(.+)\.(zip|tar\.gz|tar\.bz2)$}i', $url, $match)) {
-        if (!extension_loaded('openssl') && (0 === strpos($url, 'https:') || 0 === strpos($url, 'http://github.com'))) {
+                // update Bitbucket archives to the proper reference
-            throw new \RuntimeException('You must enable the openssl extension to download files via https');
+                $url = 'https://bitbucket.org/' . $match[1] . '/'. $match[2] . '/get/' . $package->getDistReference() . '.' . $match[4];
            }
        }
        return parent::processUrl($package, $url);
--- a/src/Composer/Downloader/DownloadManager.php
+++ b/src/Composer/Downloader/DownloadManager.php
@ -192,7 +192,7 @@ class DownloadManager
        foreach ($sources as $i => $source) {
            if (isset($e)) {
-                $this->io->write('    <warning>Now trying to download from ' . $source . '</warning>');
+                $this->io->writeError('    <warning>Now trying to download from ' . $source . '</warning>');
            }
            $package->setInstallationSource($source);
            try {
@ -206,7 +206,7 @@ class DownloadManager
                    throw $e;
                }
-                $this->io->write(
+                $this->io->writeError(
                    '    <warning>Failed to download '.
                    $package->getPrettyName().
                    ' from ' . $source . ': '.
--- a/src/Composer/Downloader/FileDownloader.php
+++ b/src/Composer/Downloader/FileDownloader.php
@ -81,7 +81,7 @@ class FileDownloader implements DownloaderInterface
            throw new \InvalidArgumentException('The given package is missing url information');
        }
-        $this->io->write("  - Installing <info>" . $package->getName() . "</info> (<comment>" . VersionParser::formatVersion($package) . "</comment>)");
+        $this->io->writeError("  - Installing <info>" . $package->getName() . "</info> (<comment>" . VersionParser::formatVersion($package) . "</comment>)");
        $urls = $package->getDistUrls();
        while ($url = array_shift($urls)) {
@ -89,11 +89,11 @@ class FileDownloader implements DownloaderInterface
                return $this->doDownload($package, $path, $url);
            } catch (\Exception $e) {
                if ($this->io->isDebug()) {
-                    $this->io->write('');
+                    $this->io->writeError('');
-                    $this->io->write('Failed: ['.get_class($e).'] '.$e->getCode().': '.$e->getMessage());
+                    $this->io->writeError('Failed: ['.get_class($e).'] '.$e->getCode().': '.$e->getMessage());
                } elseif (count($urls)) {
-                    $this->io->write('');
+                    $this->io->writeError('');
-                    $this->io->write('    Failed, trying the next URL ('.$e->getCode().': '.$e->getMessage().')');
+                    $this->io->writeError('    Failed, trying the next URL ('.$e->getCode().': '.$e->getMessage().')');
                }
                if (!count($urls)) {
@ -102,7 +102,7 @@ class FileDownloader implements DownloaderInterface
            }
        }
-        $this->io->write('');
+        $this->io->writeError('');
    }
    protected function doDownload(PackageInterface $package, $path, $url)
@ -127,7 +127,7 @@ class FileDownloader implements DownloaderInterface
            // download if we don't have it in cache or the cache is invalidated
            if (!$this->cache || ($checksum && $checksum !== $this->cache->sha1($cacheKey)) || !$this->cache->copyTo($cacheKey, $fileName)) {
                if (!$this->outputProgress) {
-                    $this->io->write('    Downloading');
+                    $this->io->writeError('    Downloading');
                }
                // try to download 3 times then fail hard
@ -142,7 +142,7 @@ class FileDownloader implements DownloaderInterface
                            throw $e;
                        }
                        if ($this->io->isVerbose()) {
-                            $this->io->write('    Download failed, retrying...');
+                            $this->io->writeError('    Download failed, retrying...');
                        }
                        usleep(500000);
                    }
@ -152,7 +152,7 @@ class FileDownloader implements DownloaderInterface
                    $this->cache->copyFrom($cacheKey, $fileName);
                }
            } else {
-                $this->io->write('    Loading from cache');
+                $this->io->writeError('    Loading from cache');
            }
            if (!file_exists($fileName)) {
@ -205,7 +205,7 @@ class FileDownloader implements DownloaderInterface
     */
    public function remove(PackageInterface $package, $path)
    {
-        $this->io->write("  - Removing <info>" . $package->getName() . "</info> (<comment>" . VersionParser::formatVersion($package) . "</comment>)");
+        $this->io->writeError("  - Removing <info>" . $package->getName() . "</info> (<comment>" . VersionParser::formatVersion($package) . "</comment>)");
        if (!$this->filesystem->removeDirectory($path)) {
            throw new \RuntimeException('Could not completely delete '.$path.', aborting.');
        }
--- a/src/Composer/Downloader/GitDownloader.php
+++ b/src/Composer/Downloader/GitDownloader.php
@ -45,7 +45,7 @@ class GitDownloader extends VcsDownloader
        $ref = $package->getSourceReference();
        $flag = defined('PHP_WINDOWS_VERSION_MAJOR') ? '/D ' : '';
        $command = 'git clone --no-checkout %s %s && cd '.$flag.'%2$s && git remote add composer %1$s && git fetch composer';
-        $this->io->write("    Cloning ".$ref);
+        $this->io->writeError("    Cloning ".$ref);
        $commandCallable = function ($url) use ($ref, $path, $command) {
            return sprintf($command, ProcessExecutor::escape($url), ProcessExecutor::escape($path), ProcessExecutor::escape($ref));
@ -74,11 +74,11 @@ class GitDownloader extends VcsDownloader
        GitUtil::cleanEnv();
        $path = $this->normalizePath($path);
        if (!is_dir($path.'/.git')) {
-            throw new \RuntimeException('The .git directory is missing from '.$path.', see http://getcomposer.org/commit-deps for more information');
+            throw new \RuntimeException('The .git directory is missing from '.$path.', see https://getcomposer.org/commit-deps for more information');
        }
        $ref = $target->getSourceReference();
-        $this->io->write("    Checking out ".$ref);
+        $this->io->writeError("    Checking out ".$ref);
        $command = 'git remote set-url composer %s && git fetch composer && git fetch --tags composer';
        $commandCallable = function ($url) use ($command) {
@ -143,10 +143,10 @@ class GitDownloader extends VcsDownloader
        $changes = array_map(function ($elem) {
            return '    '.$elem;
        }, preg_split('{\s*\r?\n\s*}', $changes));
-        $this->io->write('    <error>The package has modified files:</error>');
+        $this->io->writeError('    <error>The package has modified files:</error>');
-        $this->io->write(array_slice($changes, 0, 10));
+        $this->io->writeError(array_slice($changes, 0, 10));
        if (count($changes) > 10) {
-            $this->io->write('    <info>'.count($changes) - 10 . ' more files modified, choose "v" to view the full list</info>');
+            $this->io->writeError('    <info>'.count($changes) - 10 . ' more files modified, choose "v" to view the full list</info>');
        }
        while (true) {
@ -167,21 +167,21 @@ class GitDownloader extends VcsDownloader
                    throw new \RuntimeException('Update aborted');
                case 'v':
-                    $this->io->write($changes);
+                    $this->io->writeError($changes);
                    break;
                case '?':
                default:
                    help:
-                    $this->io->write(array(
+                    $this->io->writeError(array(
                        '    y - discard changes and apply the '.($update ? 'update' : 'uninstall'),
                        '    n - abort the '.($update ? 'update' : 'uninstall').' and let you manually clean things up',
                        '    v - view modified files',
                    ));
                    if ($update) {
-                        $this->io->write('    s - stash changes and try to reapply them after the update');
+                        $this->io->writeError('    s - stash changes and try to reapply them after the update');
                    }
-                    $this->io->write('    ? - print help');
+                    $this->io->writeError('    ? - print help');
                    break;
            }
        }
@ -195,7 +195,7 @@ class GitDownloader extends VcsDownloader
        $path = $this->normalizePath($path);
        if ($this->hasStashedChanges) {
            $this->hasStashedChanges = false;
-            $this->io->write('    <info>Re-applying stashed changes</info>');
+            $this->io->writeError('    <info>Re-applying stashed changes</info>');
            if (0 !== $this->process->execute('git stash pop', $output, $path)) {
                throw new \RuntimeException("Failed to apply stashed changes:\n\n".$this->process->getErrorOutput());
            }
@ -215,7 +215,12 @@ class GitDownloader extends VcsDownloader
     */
    protected function updateToCommit($path, $reference, $branch, $date)
    {
-        $template = 'git checkout %s && git reset --hard %1$s';
+        // This uses the "--" sequence to separate branch from file parameters.
        //
        // Otherwise git tries the branch name as well as file name.
        // If the non-existent branch is actually the name of a file, the file
        // is checked out.
        $template = 'git checkout %s -- && git reset --hard %1$s --';
        $branch = preg_replace('{(?:^dev-|(?:\.x)?-dev$)}i', '', $branch);
        $branches = null;
@ -229,7 +234,7 @@ class GitDownloader extends VcsDownloader
            && $branches
            && preg_match('{^\s+composer/'.preg_quote($reference).'$}m', $branches)
        ) {
-            $command = sprintf('git checkout -B %s %s && git reset --hard %2$s', ProcessExecutor::escape($branch), ProcessExecutor::escape('composer/'.$reference));
+            $command = sprintf('git checkout -B %s %s -- && git reset --hard %2$s --', ProcessExecutor::escape($branch), ProcessExecutor::escape('composer/'.$reference));
            if (0 === $this->process->execute($command, $output, $path)) {
                return;
            }
@ -242,12 +247,12 @@ class GitDownloader extends VcsDownloader
                $branch = 'v' . $branch;
            }
-            $command = sprintf('git checkout %s', ProcessExecutor::escape($branch));
+            $command = sprintf('git checkout %s --', ProcessExecutor::escape($branch));
-            $fallbackCommand = sprintf('git checkout -B %s %s', ProcessExecutor::escape($branch), ProcessExecutor::escape('composer/'.$branch));
+            $fallbackCommand = sprintf('git checkout -B %s %s --', ProcessExecutor::escape($branch), ProcessExecutor::escape('composer/'.$branch));
            if (0 === $this->process->execute($command, $output, $path)
                || 0 === $this->process->execute($fallbackCommand, $output, $path)
            ) {
-                $command = sprintf('git reset --hard %s', ProcessExecutor::escape($reference));
+                $command = sprintf('git reset --hard %s --', ProcessExecutor::escape($reference));
                if (0 === $this->process->execute($command, $output, $path)) {
                    return;
                }
@ -261,7 +266,7 @@ class GitDownloader extends VcsDownloader
        // reference was not found (prints "fatal: reference is not a tree: $ref")
        if (false !== strpos($this->process->getErrorOutput(), $reference)) {
-            $this->io->write('    <warning>'.$reference.' is gone (history was rewritten?)</warning>');
+            $this->io->writeError('    <warning>'.$reference.' is gone (history was rewritten?)</warning>');
        }
        throw new \RuntimeException('Failed to execute ' . GitUtil::sanitizeUrl($command) . "\n\n" . $this->process->getErrorOutput());
--- a/src/Composer/Downloader/HgDownloader.php
+++ b/src/Composer/Downloader/HgDownloader.php
@ -27,7 +27,7 @@ class HgDownloader extends VcsDownloader
    {
        $url = ProcessExecutor::escape($url);
        $ref = ProcessExecutor::escape($package->getSourceReference());
-        $this->io->write("    Cloning ".$package->getSourceReference());
+        $this->io->writeError("    Cloning ".$package->getSourceReference());
        $command = sprintf('hg clone %s %s', $url, ProcessExecutor::escape($path));
        if (0 !== $this->process->execute($command, $ignoredOutput)) {
            throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
@ -45,10 +45,10 @@ class HgDownloader extends VcsDownloader
    {
        $url = ProcessExecutor::escape($url);
        $ref = ProcessExecutor::escape($target->getSourceReference());
-        $this->io->write("    Updating to ".$target->getSourceReference());
+        $this->io->writeError("    Updating to ".$target->getSourceReference());
        if (!is_dir($path.'/.hg')) {
-            throw new \RuntimeException('The .hg directory is missing from '.$path.', see http://getcomposer.org/commit-deps for more information');
+            throw new \RuntimeException('The .hg directory is missing from '.$path.', see https://getcomposer.org/commit-deps for more information');
        }
        $command = sprintf('hg pull %s && hg up %s', $url, $ref);
--- a/src/Composer/Downloader/PearPackageExtractor.php
+++ b/src/Composer/Downloader/PearPackageExtractor.php
@ -137,7 +137,7 @@ class PearPackageExtractor
    private function buildCopyActions($source, array $roles, $vars)
    {
        /** @var $package \SimpleXmlElement */
-        $package = simplexml_load_file($this->combine($source, 'package.xml'));
+        $package = simplexml_load_string(file_get_contents($this->combine($source, 'package.xml')));
        if (false === $package) {
            throw new \RuntimeException('Package definition file is not valid.');
        }
--- a/src/Composer/Downloader/PerforceDownloader.php
+++ b/src/Composer/Downloader/PerforceDownloader.php
@ -31,7 +31,7 @@ class PerforceDownloader extends VcsDownloader
        $ref = $package->getSourceReference();
        $label = $this->getLabelFromSourceReference($ref);
-        $this->io->write('    Cloning ' . $ref);
+        $this->io->writeError('    Cloning ' . $ref);
        $this->initPerforce($package, $path, $url);
        $this->perforce->setStream($ref);
        $this->perforce->p4Login($this->io);
@ -85,7 +85,7 @@ class PerforceDownloader extends VcsDownloader
     */
    public function getLocalChanges(PackageInterface $package, $path)
    {
-        $this->io->write('Perforce driver does not check for local changes before overriding', true);
+        $this->io->writeError('Perforce driver does not check for local changes before overriding', true);
        return;
    }
--- a/src/Composer/Downloader/SvnDownloader.php
+++ b/src/Composer/Downloader/SvnDownloader.php
@ -29,7 +29,7 @@ class SvnDownloader extends VcsDownloader
        SvnUtil::cleanEnv();
        $ref = $package->getSourceReference();
-        $this->io->write("    Checking out ".$package->getSourceReference());
+        $this->io->writeError("    Checking out ".$package->getSourceReference());
        $this->execute($url, "svn co", sprintf("%s/%s", $url, $ref), null, $path);
    }
@ -42,7 +42,7 @@ class SvnDownloader extends VcsDownloader
        $ref = $target->getSourceReference();
        if (!is_dir($path.'/.svn')) {
-            throw new \RuntimeException('The .svn directory is missing from '.$path.', see http://getcomposer.org/commit-deps for more information');
+            throw new \RuntimeException('The .svn directory is missing from '.$path.', see https://getcomposer.org/commit-deps for more information');
        }
        $flags = "";
@ -52,7 +52,7 @@ class SvnDownloader extends VcsDownloader
            }
        }
-        $this->io->write("    Checking out " . $ref);
+        $this->io->writeError("    Checking out " . $ref);
        $this->execute($url, "svn switch" . $flags, sprintf("%s/%s", $url, $ref), $path);
    }
@ -114,10 +114,10 @@ class SvnDownloader extends VcsDownloader
        $changes = array_map(function ($elem) {
            return '    '.$elem;
        }, preg_split('{\s*\r?\n\s*}', $changes));
-        $this->io->write('    <error>The package has modified files:</error>');
+        $this->io->writeError('    <error>The package has modified files:</error>');
-        $this->io->write(array_slice($changes, 0, 10));
+        $this->io->writeError(array_slice($changes, 0, 10));
        if (count($changes) > 10) {
-            $this->io->write('    <info>'.count($changes) - 10 . ' more files modified, choose "v" to view the full list</info>');
+            $this->io->writeError('    <info>'.count($changes) - 10 . ' more files modified, choose "v" to view the full list</info>');
        }
        while (true) {
@ -130,12 +130,12 @@ class SvnDownloader extends VcsDownloader
                    throw new \RuntimeException('Update aborted');
                case 'v':
-                    $this->io->write($changes);
+                    $this->io->writeError($changes);
                    break;
                case '?':
                default:
-                    $this->io->write(array(
+                    $this->io->writeError(array(
                        '    y - discard changes and apply the '.($update ? 'update' : 'uninstall'),
                        '    n - abort the '.($update ? 'update' : 'uninstall').' and let you manually clean things up',
                        '    v - view modified files',
--- a/src/Composer/Downloader/VcsDownloader.php
+++ b/src/Composer/Downloader/VcsDownloader.php
@ -54,7 +54,7 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
            throw new \InvalidArgumentException('Package '.$package->getPrettyName().' is missing reference information');
        }
-        $this->io->write("  - Installing <info>" . $package->getName() . "</info> (<comment>" . VersionParser::formatVersion($package) . "</comment>)");
+        $this->io->writeError("  - Installing <info>" . $package->getName() . "</info> (<comment>" . VersionParser::formatVersion($package) . "</comment>)");
        $this->filesystem->emptyDirectory($path);
        $urls = $package->getSourceUrls();
@ -67,9 +67,9 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
                break;
            } catch (\Exception $e) {
                if ($this->io->isDebug()) {
-                    $this->io->write('Failed: ['.get_class($e).'] '.$e->getMessage());
+                    $this->io->writeError('Failed: ['.get_class($e).'] '.$e->getMessage());
                } elseif (count($urls)) {
-                    $this->io->write('    Failed, trying the next URL');
+                    $this->io->writeError('    Failed, trying the next URL');
                }
                if (!count($urls)) {
                    throw $e;
@ -77,7 +77,7 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
            }
        }
-        $this->io->write('');
+        $this->io->writeError('');
    }
    /**
@ -104,7 +104,7 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
            $to = VersionParser::formatVersion($target);
        }
-        $this->io->write("  - Updating <info>" . $name . "</info> (<comment>" . $from . "</comment> => <comment>" . $to . "</comment>)");
+        $this->io->writeError("  - Updating <info>" . $name . "</info> (<comment>" . $from . "</comment> => <comment>" . $to . "</comment>)");
        $this->cleanChanges($initial, $path, true);
        $urls = $target->getSourceUrls();
@ -117,9 +117,9 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
                break;
            } catch (\Exception $e) {
                if ($this->io->isDebug()) {
-                    $this->io->write('Failed: ['.get_class($e).'] '.$e->getMessage());
+                    $this->io->writeError('Failed: ['.get_class($e).'] '.$e->getMessage());
                } elseif (count($urls)) {
-                    $this->io->write('    Failed, trying the next URL');
+                    $this->io->writeError('    Failed, trying the next URL');
                } else {
                    // in case of failed update, try to reapply the changes before aborting
                    $this->reapplyChanges($path);
@ -146,12 +146,12 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
                    return '      ' . $line;
                }, explode("\n", $logs)));
-                $this->io->write('    '.$message);
+                $this->io->writeError('    '.$message);
-                $this->io->write($logs);
+                $this->io->writeError($logs);
            }
        }
-        $this->io->write('');
+        $this->io->writeError('');
    }
    /**
@ -159,7 +159,7 @@ abstract class VcsDownloader implements DownloaderInterface, ChangeReportInterfa
     */
    public function remove(PackageInterface $package, $path)
    {
-        $this->io->write("  - Removing <info>" . $package->getName() . "</info> (<comment>" . $package->getPrettyVersion() . "</comment>)");
+        $this->io->writeError("  - Removing <info>" . $package->getName() . "</info> (<comment>" . $package->getPrettyVersion() . "</comment>)");
        $this->cleanChanges($package, $path, false);
        if (!$this->filesystem->removeDirectory($path)) {
            throw new \RuntimeException('Could not completely delete '.$path.', aborting.');
--- a/src/Composer/EventDispatcher/EventDispatcher.php
+++ b/src/Composer/EventDispatcher/EventDispatcher.php
@ -21,7 +21,6 @@ use Composer\Composer;
 use Composer\DependencyResolver\Operation\OperationInterface;
 use Composer\Repository\CompositeRepository;
 use Composer\Script;
 use Composer\Script\CommandEvent;
 use Composer\Script\PackageEvent;
 use Composer\Util\ProcessExecutor;
@ -95,36 +94,28 @@ class EventDispatcher
    /**
     * Dispatch a package event.
     *
-     * @param  string             $eventName The constant in ScriptEvents
+     * @param string              $eventName     The constant in PackageEvents
-     * @param  boolean            $devMode   Whether or not we are in dev mode
+     * @param bool                $devMode       Whether or not we are in dev mode
-     * @param  OperationInterface $operation The package being installed/updated/removed
+     * @param PolicyInterface     $policy        The policy
-     * @return int                return code of the executed script if any, for php scripts a false return
+     * @param Pool                $pool          The pool
-     *                                      value is changed to 1, anything else to 0
+     * @param CompositeRepository $installedRepo The installed repository
-     */
+     * @param Request             $request       The request
-    public function dispatchPackageEvent($eventName, $devMode, OperationInterface $operation)
+     * @param array               $operations    The list of operations
-    {
+     * @param OperationInterface  $operation     The package being installed/updated/removed
        return $this->doDispatch(new PackageEvent($eventName, $this->composer, $this->io, $devMode, $operation));
    }
    /**
     * Dispatch a command event.
     *
-     * @param  string  $eventName      The constant in ScriptEvents
+     * @return int return code of the executed script if any, for php scripts a false return
-     * @param  boolean $devMode        Whether or not we are in dev mode
+     *             value is changed to 1, anything else to 0
     * @param  array   $additionalArgs Arguments passed by the user
     * @param  array   $flags          Optional flags to pass data not as argument
     * @return int     return code of the executed script if any, for php scripts a false return
     *                                value is changed to 1, anything else to 0
     */
-    public function dispatchCommandEvent($eventName, $devMode, $additionalArgs = array(), $flags = array())
+    public function dispatchPackageEvent($eventName, $devMode, PolicyInterface $policy, Pool $pool, CompositeRepository $installedRepo, Request $request, array $operations, OperationInterface $operation)
    {
-        return $this->doDispatch(new CommandEvent($eventName, $this->composer, $this->io, $devMode, $additionalArgs, $flags));
+        return $this->doDispatch(new PackageEvent($eventName, $this->composer, $this->io, $devMode, $policy, $pool, $installedRepo, $request, $operations, $operation));
    }
    /**
     * Dispatch a installer event.
     *
     * @param string              $eventName     The constant in InstallerEvents
     * @param bool                $devMode       Whether or not we are in dev mode
     * @param PolicyInterface     $policy        The policy
     * @param Pool                $pool          The pool
     * @param CompositeRepository $installedRepo The installed repository
@ -134,9 +125,9 @@ class EventDispatcher
     * @return int return code of the executed script if any, for php scripts a false return
     *             value is changed to 1, anything else to 0
     */
-    public function dispatchInstallerEvent($eventName, PolicyInterface $policy, Pool $pool, CompositeRepository $installedRepo, Request $request, array $operations = array())
+    public function dispatchInstallerEvent($eventName, $devMode, PolicyInterface $policy, Pool $pool, CompositeRepository $installedRepo, Request $request, array $operations = array())
    {
-        return $this->doDispatch(new InstallerEvent($eventName, $this->composer, $this->io, $policy, $pool, $installedRepo, $request, $operations));
+        return $this->doDispatch(new InstallerEvent($eventName, $this->composer, $this->io, $devMode, $policy, $pool, $installedRepo, $request, $operations));
    }
    /**
@ -163,11 +154,11 @@ class EventDispatcher
                $methodName = substr($callable, strpos($callable, '::') + 2);
                if (!class_exists($className)) {
-                    $this->io->write('<warning>Class '.$className.' is not autoloadable, can not call '.$event->getName().' script</warning>');
+                    $this->io->writeError('<warning>Class '.$className.' is not autoloadable, can not call '.$event->getName().' script</warning>');
                    continue;
                }
                if (!is_callable($callable)) {
-                    $this->io->write('<warning>Method '.$callable.' is not callable, can not call '.$event->getName().' script</warning>');
+                    $this->io->writeError('<warning>Method '.$callable.' is not callable, can not call '.$event->getName().' script</warning>');
                    continue;
                }
@ -175,13 +166,13 @@ class EventDispatcher
                    $return = false === $this->executeEventPhpScript($className, $methodName, $event) ? 1 : 0;
                } catch (\Exception $e) {
                    $message = "Script %s handling the %s event terminated with an exception";
-                    $this->io->write('<error>'.sprintf($message, $callable, $event->getName()).'</error>');
+                    $this->io->writeError('<error>'.sprintf($message, $callable, $event->getName()).'</error>');
                    throw $e;
                }
            } else {
                $args = implode(' ', array_map(array('Composer\Util\ProcessExecutor','escape'), $event->getArguments()));
                if (0 !== ($exitCode = $this->process->execute($callable . ($args === '' ? '' : ' '.$args)))) {
-                    $this->io->write(sprintf('<error>Script %s handling the %s event returned with an error</error>', $callable, $event->getName()));
+                    $this->io->writeError(sprintf('<error>Script %s handling the %s event returned with an error</error>', $callable, $event->getName()));
                    throw new \RuntimeException('Error Output: '.$this->process->getErrorOutput(), $exitCode);
                }
@ -214,10 +205,6 @@ class EventDispatcher
     */
    protected function checkListenerExpectedEvent($target, Event $event)
    {
        if (!$event instanceof Script\Event) {
            return $event;
        }
        try {
            $reflected = new \ReflectionParameter($target, 0);
        } catch (\Exception $e) {
@ -232,8 +219,24 @@ class EventDispatcher
        $expected = $typehint->getName();
        // BC support
        if (!$event instanceof $expected && $expected === 'Composer\Script\CommandEvent') {
-            $event = new CommandEvent($event->getName(), $event->getComposer(), $event->getIO(), $event->isDevMode(), $event->getArguments());
+            $event = new \Composer\Script\CommandEvent(
                $event->getName(), $event->getComposer(), $event->getIO(), $event->isDevMode(), $event->getArguments()
            );
        }
        if (!$event instanceof $expected && $expected === 'Composer\Script\PackageEvent') {
            $event = new \Composer\Script\PackageEvent(
                $event->getName(), $event->getComposer(), $event->getIO(), $event->isDevMode(),
                $event->getPolicy(), $event->getPool(), $event->getInstalledRepo(), $event->getRequest(),
                $event->getOperations(), $event->getOperation()
            );
        }
        if (!$event instanceof $expected && $expected === 'Composer\Script\Event') {
            $event = new \Composer\Script\Event(
                $event->getName(), $event->getComposer(), $event->getIO(), $event->isDevMode(),
                $event->getArguments(), $event->getFlags()
            );
        }
        return $event;
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@ -194,10 +194,10 @@ class Factory
        $config->merge(array('config' => array('home' => $home, 'cache-dir' => $cacheDir, 'data-dir' => $dataDir)));
        // load global config
-        $file = new JsonFile($home.'/config.json');
+        $file = new JsonFile($config->get('home').'/config.json');
        if ($file->exists()) {
            if ($io && $io->isDebug()) {
-                $io->write('Loading config file ' . $file->getPath());
+                $io->writeError('Loading config file ' . $file->getPath());
            }
            $config->merge($file->read());
        }
@ -207,7 +207,7 @@ class Factory
        $file = new JsonFile($config->get('home').'/auth.json');
        if ($file->exists()) {
            if ($io && $io->isDebug()) {
-                $io->write('Loading config file ' . $file->getPath());
+                $io->writeError('Loading config file ' . $file->getPath());
            }
            $config->merge(array('config' => $file->read()));
        }
@ -295,7 +295,7 @@ class Factory
                } else {
                    $message = 'Composer could not find the config file: '.$localConfig;
                }
-                $instructions = 'To initialize a project, please create a composer.json file as described in the http://getcomposer.org/ "Getting Started" section';
+                $instructions = 'To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section';
                throw new \InvalidArgumentException($message.PHP_EOL.$instructions);
            }
@ -308,12 +308,12 @@ class Factory
        $config->merge($localConfig);
        if (isset($composerFile)) {
            if ($io && $io->isDebug()) {
-                $io->write('Loading config file ' . $composerFile);
+                $io->writeError('Loading config file ' . $composerFile);
            }
            $localAuthFile = new JsonFile(dirname(realpath($composerFile)) . '/auth.json');
            if ($localAuthFile->exists()) {
                if ($io && $io->isDebug()) {
-                    $io->write('Loading config file ' . $localAuthFile->getPath());
+                    $io->writeError('Loading config file ' . $localAuthFile->getPath());
                }
                $config->merge(array('config' => $localAuthFile->read()));
                $config->setAuthConfigSource(new JsonConfigSource($localAuthFile, true));
@ -330,9 +330,6 @@ class Factory
        if ($fullLoad) {
            // load auth configs into the IO instance
            $io->loadConfiguration($config);
            // setup process timeout
            ProcessExecutor::setTimeout((int) $config->get('process-timeout'));
        }
        // initialize event dispatcher
@ -443,7 +440,7 @@ class Factory
            $composer = self::createComposer($io, $config->get('home') . '/composer.json', $disablePlugins, $config->get('home'), false);
        } catch (\Exception $e) {
            if ($io->isDebug()) {
-                $io->write('Failed to initialize global composer: '.$e->getMessage());
+                $io->writeError('Failed to initialize global composer: '.$e->getMessage());
            }
        }
--- a/src/Composer/IO/BaseIO.php
+++ b/src/Composer/IO/BaseIO.php
@ -13,6 +13,7 @@
 namespace Composer\IO;
 use Composer\Config;
 use Composer\Util\ProcessExecutor;
 abstract class BaseIO implements IOInterface
 {
@ -75,5 +76,8 @@ abstract class BaseIO implements IOInterface
                $this->setAuthentication($domain, $cred['username'], $cred['password']);
            }
        }
        // setup process timeout
        ProcessExecutor::setTimeout((int) $config->get('process-timeout'));
    }
 }
--- a/src/Composer/IO/BufferIO.php
+++ b/src/Composer/IO/BufferIO.php
@ -23,16 +23,19 @@ use Symfony\Component\Console\Helper\HelperSet;
 class BufferIO extends ConsoleIO
 {
    /**
-     * @param string                   $input
+     * @param string $input
-     * @param int                      $verbosity
+     * @param int $verbosity
     * @param OutputFormatterInterface $formatter
     */
-    public function __construct($input = '', $verbosity = null, OutputFormatterInterface $formatter = null)
+    public function __construct(
-    {
+        $input = '',
        $verbosity = StreamOutput::VERBOSITY_NORMAL,
        OutputFormatterInterface $formatter = null
    ) {
        $input = new StringInput($input);
        $input->setInteractive(false);
-        $output = new StreamOutput(fopen('php://memory', 'rw'), $verbosity === null ? StreamOutput::VERBOSITY_NORMAL : $verbosity, !empty($formatter), $formatter);
+        $output = new StreamOutput(fopen('php://memory', 'rw'), $verbosity, !empty($formatter), $formatter);
        parent::__construct($input, $output, new HelperSet(array()));
    }
--- a/src/Composer/IO/ConsoleIO.php
+++ b/src/Composer/IO/ConsoleIO.php
@ -13,8 +13,11 @@
 namespace Composer\IO;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Helper\HelperSet;
 use Symfony\Component\Console\Question\ConfirmationQuestion;
 use Symfony\Component\Console\Question\Question;
 use Symfony\Component\Process\ExecutableFinder;
 /**
@ -29,6 +32,7 @@ class ConsoleIO extends BaseIO
    protected $output;
    protected $helperSet;
    protected $lastMessage;
    protected $lastMessageErr;
    private $startTime;
    /**
@ -79,7 +83,7 @@ class ConsoleIO extends BaseIO
     */
    public function isVeryVerbose()
    {
-        return $this->output->getVerbosity() >= 3; // OutputInterface::VERSOBITY_VERY_VERBOSE
+        return $this->output->getVerbosity() >= OutputInterface::VERBOSITY_VERY_VERBOSE;
    }
    /**
@ -87,13 +91,31 @@ class ConsoleIO extends BaseIO
     */
    public function isDebug()
    {
-        return $this->output->getVerbosity() >= 4; // OutputInterface::VERBOSITY_DEBUG
+        return $this->output->getVerbosity() >= OutputInterface::VERBOSITY_DEBUG;
    }
    /**
     * {@inheritDoc}
     */
    public function write($messages, $newline = true)
    {
        $this->doWrite($messages, $newline, false);
    }
    /**
     * {@inheritDoc}
     */
    public function writeError($messages, $newline = true)
    {
        $this->doWrite($messages, $newline, true);
    }
    /**
     * @param array $messages
     * @param boolean $newline
     * @param boolean $stderr
     */
    private function doWrite($messages, $newline, $stderr)
    {
        if (null !== $this->startTime) {
            $memoryUsage = memory_get_usage() / 1024 / 1024;
@ -102,6 +124,14 @@ class ConsoleIO extends BaseIO
                return sprintf('[%.1fMB/%.2fs] %s', $memoryUsage, $timeSpent, $message);
            }, (array) $messages);
        }
        if (true === $stderr && $this->output instanceof ConsoleOutputInterface) {
            $this->output->getErrorOutput()->write($messages, $newline);
            $this->lastMessageErr = join($newline ? "\n" : '', (array) $messages);
            return;
        }
        $this->output->write($messages, $newline);
        $this->lastMessage = join($newline ? "\n" : '', (array) $messages);
    }
@ -111,40 +141,56 @@ class ConsoleIO extends BaseIO
     */
    public function overwrite($messages, $newline = true, $size = null)
    {
-        if (!$this->output->isDecorated()) {
+        $this->doOverwrite($messages, $newline, $size, false);
-            if (!$messages) {
+    }
                return;
            }
-            return $this->write($messages, count($messages) === 1 || $newline);
+    /**
-        }
+     * {@inheritDoc}
     */
    public function overwriteError($messages, $newline = true, $size = null)
    {
        $this->doOverwrite($messages, $newline, $size, true);
    }
    /**
     * @param array $messages
     * @param boolean $newline
     * @param integer $size
     * @param boolean $stderr
     */
    private function doOverwrite($messages, $newline, $size, $stderr)
    {
        // messages can be an array, let's convert it to string anyway
        $messages = join($newline ? "\n" : '', (array) $messages);
        // since overwrite is supposed to overwrite last message...
        if (!isset($size)) {
            // removing possible formatting of lastMessage with strip_tags
-            $size = strlen(strip_tags($this->lastMessage));
+            $size = strlen(strip_tags($stderr ? $this->lastMessageErr : $this->lastMessage));
        }
        // ...let's fill its length with backspaces
-        $this->write(str_repeat("\x08", $size), false);
+        $this->doWrite(str_repeat("\x08", $size), false, $stderr);
        // write the new message
-        $this->write($messages, false);
+        $this->doWrite($messages, false, $stderr);
        $fill = $size - strlen(strip_tags($messages));
        if ($fill > 0) {
            // whitespace whatever has left
-            $this->write(str_repeat(' ', $fill), false);
+            $this->doWrite(str_repeat(' ', $fill), false, $stderr);
            // move the cursor back
-            $this->write(str_repeat("\x08", $fill), false);
+            $this->doWrite(str_repeat("\x08", $fill), false, $stderr);
        }
        if ($newline) {
-            $this->write('');
+            $this->doWrite('', true, $stderr);
        }
        if ($stderr) {
            $this->lastMessageErr = $messages;
        } else {
            $this->lastMessage = $messages;
        }
        $this->lastMessage = $messages;
    }
    /**
@ -152,7 +198,17 @@ class ConsoleIO extends BaseIO
     */
    public function ask($question, $default = null)
    {
-        return $this->helperSet->get('dialog')->ask($this->output, $question, $default);
+        $output = $this->output;
        if ($output instanceof ConsoleOutputInterface) {
            $output = $output->getErrorOutput();
        }
        /** @var \Symfony\Component\Console\Helper\QuestionHelper $helper */
        $helper = $this->helperSet->get('question');
        $question = new Question($question, $default);
        return $helper->ask($this->input, $output, $question);
    }
    /**
@ -160,15 +216,37 @@ class ConsoleIO extends BaseIO
     */
    public function askConfirmation($question, $default = true)
    {
-        return $this->helperSet->get('dialog')->askConfirmation($this->output, $question, $default);
+        $output = $this->output;
        if ($output instanceof ConsoleOutputInterface) {
            $output = $output->getErrorOutput();
        }
        /** @var \Symfony\Component\Console\Helper\QuestionHelper $helper */
        $helper = $this->helperSet->get('question');
        $question = new ConfirmationQuestion($question, $default);
        return $helper->ask($this->input, $output, $question);
    }
    /**
     * {@inheritDoc}
     */
-    public function askAndValidate($question, $validator, $attempts = false, $default = null)
+    public function askAndValidate($question, $validator, $attempts = null, $default = null)
    {
-        return $this->helperSet->get('dialog')->askAndValidate($this->output, $question, $validator, $attempts, $default);
+        $output = $this->output;
        if ($output instanceof ConsoleOutputInterface) {
            $output = $output->getErrorOutput();
        }
        /** @var \Symfony\Component\Console\Helper\QuestionHelper $helper */
        $helper = $this->helperSet->get('question');
        $question = new Question($question, $default);
        $question->setValidator($validator);
        $question->setMaxAttempts($attempts);
        return $helper->ask($this->input, $output, $question);
    }
    /**
@ -176,71 +254,8 @@ class ConsoleIO extends BaseIO
     */
    public function askAndHideAnswer($question)
    {
-        // handle windows
+        $this->writeError($question, false);
        if (defined('PHP_WINDOWS_VERSION_BUILD')) {
            $finder = new ExecutableFinder();
-            // use bash if it's present
+        return \Seld\CliPrompt\CliPrompt::hiddenPrompt(true);
            if ($finder->find('bash') && $finder->find('stty')) {
                $this->write($question, false);
                $value = rtrim(shell_exec('bash -c "stty -echo; read -n0 discard; read -r mypassword; stty echo; echo $mypassword"'));
                $this->write('');
                return $value;
            }
            // fallback to hiddeninput executable
            $exe = __DIR__.'\\hiddeninput.exe';
            // handle code running from a phar
            if ('phar:' === substr(__FILE__, 0, 5)) {
                $tmpExe = sys_get_temp_dir().'/hiddeninput.exe';
                // use stream_copy_to_stream instead of copy
                // to work around https://bugs.php.net/bug.php?id=64634
                $source = fopen(__DIR__.'\\hiddeninput.exe', 'r');
                $target = fopen($tmpExe, 'w+');
                stream_copy_to_stream($source, $target);
                fclose($source);
                fclose($target);
                unset($source, $target);
                $exe = $tmpExe;
            }
            $this->write($question, false);
            $value = rtrim(shell_exec($exe));
            $this->write('');
            // clean up
            if (isset($tmpExe)) {
                unlink($tmpExe);
            }
            return $value;
        }
        if (file_exists('/usr/bin/env')) {
            // handle other OSs with bash/zsh/ksh/csh if available to hide the answer
            $test = "/usr/bin/env %s -c 'echo OK' 2> /dev/null";
            foreach (array('bash', 'zsh', 'ksh', 'csh') as $sh) {
                if ('OK' === rtrim(shell_exec(sprintf($test, $sh)))) {
                    $shell = $sh;
                    break;
                }
            }
            if (isset($shell)) {
                $this->write($question, false);
                $readCmd = ($shell === 'csh') ? 'set mypassword = $<' : 'read -r mypassword';
                $command = sprintf("/usr/bin/env %s -c 'stty -echo; %s; stty echo; echo \$mypassword'", $shell, $readCmd);
                $value = rtrim(shell_exec($command));
                $this->write('');
                return $value;
            }
        }
        // not able to hide the answer, proceed with normal question handling
        return $this->ask($question);
    }
 }
--- a/src/Composer/IO/IOInterface.php
+++ b/src/Composer/IO/IOInterface.php
@ -64,6 +64,14 @@ interface IOInterface
     */
    public function write($messages, $newline = true);
    /**
     * Writes a message to the error output.
     *
     * @param string|array $messages The message as an array of lines or a single string
     * @param bool         $newline  Whether to add a newline or not
     */
    public function writeError($messages, $newline = true);
    /**
     * Overwrites a previous message to the output.
     *
@ -73,6 +81,15 @@ interface IOInterface
     */
    public function overwrite($messages, $newline = true, $size = null);
    /**
     * Overwrites a previous message to the error output.
     *
     * @param string|array $messages The message as an array of lines or a single string
     * @param bool         $newline  Whether to add a newline or not
     * @param integer      $size     The size of line
     */
    public function overwriteError($messages, $newline = true, $size = null);
    /**
     * Asks a question to the user.
     *
@ -106,14 +123,14 @@ interface IOInterface
     *
     * @param string|array $question  The question to ask
     * @param callback     $validator A PHP callback
-     * @param bool|integer $attempts  Max number of times to ask before giving up (false by default, which means infinite)
+     * @param null|integer $attempts  Max number of times to ask before giving up (default of null means infinite)
     * @param string       $default   The default answer if none is given by the user
     *
     * @return mixed
     *
     * @throws \Exception When any of the validators return an error
     */
-    public function askAndValidate($question, $validator, $attempts = false, $default = null);
+    public function askAndValidate($question, $validator, $attempts = null, $default = null);
    /**
     * Asks a question to the user and hide the answer.
--- a/src/Composer/IO/NullIO.php
+++ b/src/Composer/IO/NullIO.php
@ -66,6 +66,13 @@ class NullIO extends BaseIO
    {
    }
    /**
     * {@inheritDoc}
     */
    public function writeError($messages, $newline = true)
    {
    }
    /**
     * {@inheritDoc}
     */
@ -73,6 +80,13 @@ class NullIO extends BaseIO
    {
    }
    /**
     * {@inheritDoc}
     */
    public function overwriteError($messages, $newline = true, $size = 80)
    {
    }
    /**
     * {@inheritDoc}
     */
--- a/src/Composer/IO/hiddeninput.exe
+++ b/src/Composer/IO/hiddeninput.exe
--- a/src/Composer/Installer.php
+++ b/src/Composer/Installer.php
@ -177,7 +177,7 @@ class Installer
        // purge old require-dev packages to avoid conflicts with the new way of handling dev requirements
        $devRepo = new InstalledFilesystemRepository(new JsonFile($this->config->get('vendor-dir').'/composer/installed_dev.json'));
        if ($devRepo->getPackages()) {
-            $this->io->write('<warning>BC Notice: Removing old dev packages to migrate to the new require-dev handling.</warning>');
+            $this->io->writeError('<warning>BC Notice: Removing old dev packages to migrate to the new require-dev handling.</warning>');
            foreach ($devRepo->getPackages() as $package) {
                if ($this->installationManager->isPackageInstalled($devRepo, $package)) {
                    $this->installationManager->uninstall($devRepo, new UninstallOperation($package));
@ -191,7 +191,7 @@ class Installer
        if ($this->runScripts) {
            // dispatch pre event
            $eventName = $this->update ? ScriptEvents::PRE_UPDATE_CMD : ScriptEvents::PRE_INSTALL_CMD;
-            $this->eventDispatcher->dispatchCommandEvent($eventName, $this->devMode);
+            $this->eventDispatcher->dispatchScript($eventName, $this->devMode);
        }
        $this->downloadManager->setPreferSource($this->preferSource);
@ -206,7 +206,12 @@ class Installer
        // create installed repo, this contains all local packages + platform packages (php & extensions)
        $localRepo = $this->repositoryManager->getLocalRepository();
-        $platformRepo = new PlatformRepository();
+        if (!$this->update && $this->locker->isLocked()) {
            $platformOverrides = $this->locker->getPlatformOverrides();
        } else {
            $platformOverrides = $this->config->get('platform') ?: array();
        }
        $platformRepo = new PlatformRepository(array(), $platformOverrides);
        $repos = array(
            $localRepo,
            new InstalledArrayRepository(array($installedRootPackage)),
@ -243,7 +248,7 @@ class Installer
                    }
                }
-                $this->io->write($suggestion['source'].' suggests installing '.$suggestion['target'].' ('.$suggestion['reason'].')');
+                $this->io->writeError($suggestion['source'].' suggests installing '.$suggestion['target'].' ('.$suggestion['reason'].')');
            }
        }
@ -257,9 +262,9 @@ class Installer
                ? 'Use ' . $package->getReplacementPackage() . ' instead'
                : 'No replacement was suggested';
-            $this->io->write(
+            $this->io->writeError(
                sprintf(
-                    "<error>Package %s is abandoned, you should avoid using it. %s.</error>",
+                    "<warning>Package %s is abandoned, you should avoid using it. %s.</warning>",
                    $package->getPrettyName(),
                    $replacement
                )
@ -282,16 +287,16 @@ class Installer
                    $pool->addRepository($installedRepo, $aliases);
                    // creating requirements request
-                    $request = $this->createRequest($pool, $this->package, $platformRepo);
+                    $request = $this->createRequest($this->package, $platformRepo);
                    $request->updateAll();
                    foreach ($this->package->getRequires() as $link) {
                        $request->install($link->getTarget(), $link->getConstraint());
                    }
-                    $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request);
+                    $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, false, $policy, $pool, $installedRepo, $request);
                    $solver = new Solver($policy, $pool, $installedRepo);
                    $ops = $solver->solve($request, $this->ignorePlatformReqs);
-                    $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request, $ops);
+                    $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, false, $policy, $pool, $installedRepo, $request, $ops);
                    foreach ($ops as $op) {
                        if ($op->getJobType() === 'uninstall') {
                            $devPackages[] = $op->getPackage();
@ -311,19 +316,20 @@ class Installer
                    $this->package->getMinimumStability(),
                    $this->package->getStabilityFlags(),
                    $this->preferStable || $this->package->getPreferStable(),
-                    $this->preferLowest
+                    $this->preferLowest,
                    $this->config->get('platform') ?: array()
                );
                if ($updatedLock) {
-                    $this->io->write('<info>Writing lock file</info>');
+                    $this->io->writeError('<info>Writing lock file</info>');
                }
            }
            if ($this->dumpAutoloader) {
                // write autoloader
                if ($this->optimizeAutoloader) {
-                    $this->io->write('<info>Generating optimized autoload files</info>');
+                    $this->io->writeError('<info>Generating optimized autoload files</info>');
                } else {
-                    $this->io->write('<info>Generating autoload files</info>');
+                    $this->io->writeError('<info>Generating autoload files</info>');
                }
                $this->autoloadGenerator->setDevMode($this->devMode);
@ -333,7 +339,7 @@ class Installer
            if ($this->runScripts) {
                // dispatch post event
                $eventName = $this->update ? ScriptEvents::POST_UPDATE_CMD : ScriptEvents::POST_INSTALL_CMD;
-                $this->eventDispatcher->dispatchCommandEvent($eventName, $this->devMode);
+                $this->eventDispatcher->dispatchScript($eventName, $this->devMode);
            }
            $vendorDir = $this->config->get('vendor-dir');
@ -352,9 +358,12 @@ class Installer
        $repositories = null;
        // initialize locker to create aliased packages
-        $installFromLock = false;
+        $installFromLock = !$this->update && $this->locker->isLocked();
-        if (!$this->update && $this->locker->isLocked()) {
+
-            $installFromLock = true;
+        // initialize locked repo if we are installing from lock or in a partial update
        // and a lock file is present as we need to force install non-whitelisted lock file
        // packages in that case
        if ($installFromLock || (!empty($this->updateWhitelist) && $this->locker->isLocked())) {
            try {
                $lockedRepository = $this->locker->getLockedRepository($withDevReqs);
            } catch (\RuntimeException $e) {
@ -374,25 +383,27 @@ class Installer
            $this->package->getDevRequires()
        );
-        $this->io->write('<info>Loading composer repositories with package information</info>');
+        $this->io->writeError('<info>Loading composer repositories with package information</info>');
        // creating repository pool
        $policy = $this->createPolicy();
-        $pool = $this->createPool($withDevReqs);
+        $pool = $this->createPool($withDevReqs, $installFromLock ? $lockedRepository : null);
        $pool->addRepository($installedRepo, $aliases);
        if ($installFromLock) {
            $pool->addRepository($lockedRepository, $aliases);
        }
        if (!$installFromLock) {
            $repositories = $this->repositoryManager->getRepositories();
            foreach ($repositories as $repository) {
                $pool->addRepository($repository, $aliases);
            }
        }
        // Add the locked repository after the others in case we are doing a
        // partial update so missing packages can be found there still.
        // For installs from lock it's the only one added so it is first
        if ($lockedRepository) {
            $pool->addRepository($lockedRepository, $aliases);
        }
        // creating requirements request
-        $request = $this->createRequest($pool, $this->package, $platformRepo);
+        $request = $this->createRequest($this->package, $platformRepo);
        if (!$installFromLock) {
            // remove unstable packages from the localRepo if they don't match the current stability settings
@ -409,7 +420,7 @@ class Installer
        }
        if ($this->update) {
-            $this->io->write('<info>Updating dependencies'.($withDevReqs ? ' (including require-dev)' : '').'</info>');
+            $this->io->writeError('<info>Updating dependencies'.($withDevReqs ? ' (including require-dev)' : '').'</info>');
            $request->updateAll();
@ -426,16 +437,7 @@ class Installer
            // if the updateWhitelist is enabled, packages not in it are also fixed
            // to the version specified in the lock, or their currently installed version
            if ($this->updateWhitelist) {
-                if ($this->locker->isLocked()) {
+                $currentPackages = $this->getCurrentPackages($withDevReqs, $installedRepo);
                    try {
                        $currentPackages = $this->locker->getLockedRepository($withDevReqs)->getPackages();
                    } catch (\RuntimeException $e) {
                        // fetch only non-dev packages from lock if doing a dev update fails due to a previously incomplete lock file
                        $currentPackages = $this->locker->getLockedRepository()->getPackages();
                    }
                } else {
                    $currentPackages = $installedRepo->getPackages();
                }
                // collect packages to fixate from root requirements as well as installed packages
                $candidates = array();
@ -460,10 +462,10 @@ class Installer
                }
            }
        } elseif ($installFromLock) {
-            $this->io->write('<info>Installing dependencies'.($withDevReqs ? ' (including require-dev)' : '').' from lock file</info>');
+            $this->io->writeError('<info>Installing dependencies'.($withDevReqs ? ' (including require-dev)' : '').' from lock file</info>');
            if (!$this->locker->isFresh()) {
-                $this->io->write('<warning>Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.</warning>');
+                $this->io->writeError('<warning>Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.</warning>');
            }
            foreach ($lockedRepository->getPackages() as $package) {
@ -480,7 +482,7 @@ class Installer
                $request->install($link->getTarget(), $link->getConstraint());
            }
        } else {
-            $this->io->write('<info>Installing dependencies'.($withDevReqs ? ' (including require-dev)' : '').'</info>');
+            $this->io->writeError('<info>Installing dependencies'.($withDevReqs ? ' (including require-dev)' : '').'</info>');
            if ($withDevReqs) {
                $links = array_merge($this->package->getRequires(), $this->package->getDevRequires());
@ -494,27 +496,27 @@ class Installer
        }
        // force dev packages to have the latest links if we update or install from a (potentially new) lock
-        $this->processDevPackages($localRepo, $pool, $policy, $repositories, $lockedRepository, $installFromLock, 'force-links');
+        $this->processDevPackages($localRepo, $pool, $policy, $repositories, $installedRepo, $lockedRepository, $installFromLock, $withDevReqs, 'force-links');
        // solve dependencies
-        $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request);
+        $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::PRE_DEPENDENCIES_SOLVING, $this->devMode, $policy, $pool, $installedRepo, $request);
        $solver = new Solver($policy, $pool, $installedRepo);
        try {
            $operations = $solver->solve($request, $this->ignorePlatformReqs);
-            $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $policy, $pool, $installedRepo, $request, $operations);
+            $this->eventDispatcher->dispatchInstallerEvent(InstallerEvents::POST_DEPENDENCIES_SOLVING, $this->devMode, $policy, $pool, $installedRepo, $request, $operations);
        } catch (SolverProblemsException $e) {
-            $this->io->write('<error>Your requirements could not be resolved to an installable set of packages.</error>');
+            $this->io->writeError('<error>Your requirements could not be resolved to an installable set of packages.</error>');
-            $this->io->write($e->getMessage());
+            $this->io->writeError($e->getMessage());
            return max(1, $e->getCode());
        }
        // force dev packages to be updated if we update or install from a (potentially new) lock
-        $operations = $this->processDevPackages($localRepo, $pool, $policy, $repositories, $lockedRepository, $installFromLock, 'force-updates', $operations);
+        $operations = $this->processDevPackages($localRepo, $pool, $policy, $repositories, $installedRepo, $lockedRepository, $installFromLock, $withDevReqs, 'force-updates', $operations);
        // execute operations
        if (!$operations) {
-            $this->io->write('Nothing to install or update');
+            $this->io->writeError('Nothing to install or update');
        }
        $operations = $this->movePluginsToFront($operations);
@ -553,26 +555,26 @@ class Installer
                    && $operation->getTargetPackage()->getSourceReference() === $operation->getInitialPackage()->getSourceReference()
                ) {
                    if ($this->io->isDebug()) {
-                        $this->io->write('  - Skipping update of '. $operation->getTargetPackage()->getPrettyName().' to the same reference-locked version');
+                        $this->io->writeError('  - Skipping update of '. $operation->getTargetPackage()->getPrettyName().' to the same reference-locked version');
-                        $this->io->write('');
+                        $this->io->writeError('');
                    }
                    continue;
                }
            }
-            $event = 'Composer\Script\ScriptEvents::PRE_PACKAGE_'.strtoupper($operation->getJobType());
+            $event = 'Composer\Installer\PackageEvents::PRE_PACKAGE_'.strtoupper($operation->getJobType());
            if (defined($event) && $this->runScripts) {
-                $this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $operation);
+                $this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $policy, $pool, $installedRepo, $request, $operations, $operation);
            }
            // output non-alias ops in dry run, output alias ops in debug verbosity
            if ($this->dryRun && false === strpos($operation->getJobType(), 'Alias')) {
-                $this->io->write('  - ' . $operation);
+                $this->io->writeError('  - ' . $operation);
-                $this->io->write('');
+                $this->io->writeError('');
            } elseif ($this->io->isDebug() && false !== strpos($operation->getJobType(), 'Alias')) {
-                $this->io->write('  - ' . $operation);
+                $this->io->writeError('  - ' . $operation);
-                $this->io->write('');
+                $this->io->writeError('');
            }
            $this->installationManager->execute($localRepo, $operation);
@ -583,20 +585,20 @@ class Installer
                if ($reason instanceof Rule) {
                    switch ($reason->getReason()) {
                        case Rule::RULE_JOB_INSTALL:
-                            $this->io->write('    REASON: Required by root: '.$reason->getPrettyString($pool));
+                            $this->io->writeError('    REASON: Required by root: '.$reason->getPrettyString($pool));
-                            $this->io->write('');
+                            $this->io->writeError('');
                            break;
                        case Rule::RULE_PACKAGE_REQUIRES:
-                            $this->io->write('    REASON: '.$reason->getPrettyString($pool));
+                            $this->io->writeError('    REASON: '.$reason->getPrettyString($pool));
-                            $this->io->write('');
+                            $this->io->writeError('');
                            break;
                    }
                }
            }
-            $event = 'Composer\Script\ScriptEvents::POST_PACKAGE_'.strtoupper($operation->getJobType());
+            $event = 'Composer\Installer\PackageEvents::POST_PACKAGE_'.strtoupper($operation->getJobType());
            if (defined($event) && $this->runScripts) {
-                $this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $operation);
+                $this->eventDispatcher->dispatchPackageEvent(constant($event), $this->devMode, $policy, $pool, $installedRepo, $request, $operations, $operation);
            }
            if (!$this->dryRun) {
@ -604,6 +606,12 @@ class Installer
            }
        }
        if (!$this->dryRun) {
            // force source/dist urls to be updated for all packages
            $operations = $this->processPackageUrls($pool, $policy, $localRepo, $repositories);
            $localRepo->write();
        }
        return 0;
    }
@ -671,27 +679,39 @@ class Installer
        return array_merge($uninstOps, $operations);
    }
-    private function createPool($withDevReqs)
+    private function createPool($withDevReqs, RepositoryInterface $lockedRepository = null)
    {
-        $minimumStability = $this->package->getMinimumStability();
+        if (!$this->update && $this->locker->isLocked()) { // install from lock
        $stabilityFlags = $this->package->getStabilityFlags();
        if (!$this->update && $this->locker->isLocked()) {
            $minimumStability = $this->locker->getMinimumStability();
            $stabilityFlags = $this->locker->getStabilityFlags();
            $requires = array();
            foreach ($lockedRepository->getPackages() as $package) {
                $constraint = new VersionConstraint('=', $package->getVersion());
                $constraint->setPrettyString($package->getPrettyVersion());
                $requires[$package->getName()] = $constraint;
            }
        } else {
            $minimumStability = $this->package->getMinimumStability();
            $stabilityFlags = $this->package->getStabilityFlags();
            $requires = $this->package->getRequires();
            if ($withDevReqs) {
                $requires = array_merge($requires, $this->package->getDevRequires());
            }
        }
        $requires = $this->package->getRequires();
        if ($withDevReqs) {
            $requires = array_merge($requires, $this->package->getDevRequires());
        }
        $rootConstraints = array();
        foreach ($requires as $req => $constraint) {
            // skip platform requirements from the root package to avoid filtering out existing platform packages
            if ($this->ignorePlatformReqs && preg_match(PlatformRepository::PLATFORM_PACKAGE_REGEX, $req)) {
                continue;
            }
-            $rootConstraints[$req] = $constraint->getConstraint();
+            if ($constraint instanceof Link) {
                $rootConstraints[$req] = $constraint->getConstraint();
            } else {
                $rootConstraints[$req] = $constraint;
            }
        }
        return new Pool($minimumStability, $stabilityFlags, $rootConstraints);
@ -717,9 +737,9 @@ class Installer
        return new DefaultPolicy($preferStable, $preferLowest);
    }
-    private function createRequest(Pool $pool, RootPackageInterface $rootPackage, PlatformRepository $platformRepo)
+    private function createRequest(RootPackageInterface $rootPackage, PlatformRepository $platformRepo)
    {
-        $request = new Request($pool);
+        $request = new Request();
        $constraint = new VersionConstraint('=', $rootPackage->getVersion());
        $constraint->setPrettyString($rootPackage->getPrettyVersion());
@ -750,7 +770,7 @@ class Installer
        return $request;
    }
-    private function processDevPackages($localRepo, $pool, $policy, $repositories, $lockedRepository, $installFromLock, $task, array $operations = null)
+    private function processDevPackages($localRepo, $pool, $policy, $repositories, $installedRepo, $lockedRepository, $installFromLock, $withDevReqs, $task, array $operations = null)
    {
        if ($task === 'force-updates' && null === $operations) {
            throw new \InvalidArgumentException('Missing operations argument');
@ -759,6 +779,10 @@ class Installer
            $operations = array();
        }
        if (!$installFromLock && $this->updateWhitelist) {
            $currentPackages = $this->getCurrentPackages($withDevReqs, $installedRepo);
        }
        foreach ($localRepo->getCanonicalPackages() as $package) {
            // skip non-dev packages
            if (!$package->isDev()) {
@ -799,6 +823,26 @@ class Installer
                if ($this->update) {
                    // skip package if the whitelist is enabled and it is not in it
                    if ($this->updateWhitelist && !$this->isUpdateable($package)) {
                        // check if non-updateable packages are out of date compared to the lock file to ensure we don't corrupt it
                        foreach ($currentPackages as $curPackage) {
                            if ($curPackage->isDev() && $curPackage->getName() === $package->getName() && $curPackage->getVersion() === $package->getVersion()) {
                                if ($task === 'force-links') {
                                    $package->setRequires($curPackage->getRequires());
                                    $package->setConflicts($curPackage->getConflicts());
                                    $package->setProvides($curPackage->getProvides());
                                    $package->setReplaces($curPackage->getReplaces());
                                } elseif ($task === 'force-updates') {
                                    if (($curPackage->getSourceReference() && $curPackage->getSourceReference() !== $package->getSourceReference())
                                        || ($curPackage->getDistReference() && $curPackage->getDistReference() !== $package->getDistReference())
                                    ) {
                                        $operations[] = new UpdateOperation($package, $curPackage);
                                    }
                                }
                                break;
                            }
                        }
                        continue;
                    }
@ -820,8 +864,8 @@ class Installer
                        $matches[$index] = $match->getId();
                    }
-                    // select prefered package according to policy rules
+                    // select preferred package according to policy rules
-                    if ($matches && $matches = $policy->selectPreferedPackages($pool, array(), $matches)) {
+                    if ($matches && $matches = $policy->selectPreferredPackages($pool, array(), $matches)) {
                        $newPackage = $pool->literalToPackage($matches[0]);
                        if ($task === 'force-links' && $newPackage) {
@ -842,7 +886,7 @@ class Installer
                }
                if ($task === 'force-updates') {
-                    // force installed package to update to referenced version if it does not match the installed version
+                    // force installed package to update to referenced version in root package if it does not match the installed version
                    $references = $this->package->getReferences();
                    if (isset($references[$package->getName()]) && $references[$package->getName()] !== $package->getSourceReference()) {
@ -856,6 +900,23 @@ class Installer
        return $operations;
    }
    /**
     * Loads the most "current" list of packages that are installed meaning from lock ideally or from installed repo as fallback
     */
    private function getCurrentPackages($withDevReqs, $installedRepo)
    {
        if ($this->locker->isLocked()) {
            try {
                return $this->locker->getLockedRepository($withDevReqs)->getPackages();
            } catch (\RuntimeException $e) {
                // fetch only non-dev packages from lock if doing a dev update fails due to a previously incomplete lock file
                return $this->locker->getLockedRepository()->getPackages();
            }
        }
        return $installedRepo->getPackages();
    }
    private function getRootAliases()
    {
        if (!$this->update && $this->locker->isLocked()) {
@ -876,6 +937,46 @@ class Installer
        return $normalizedAliases;
    }
    private function processPackageUrls($pool, $policy, $localRepo, $repositories)
    {
        if (!$this->update) {
            return;
        }
        foreach ($localRepo->getCanonicalPackages() as $package) {
            // find similar packages (name/version) in all repositories
            $matches = $pool->whatProvides($package->getName(), new VersionConstraint('=', $package->getVersion()));
            foreach ($matches as $index => $match) {
                // skip local packages
                if (!in_array($match->getRepository(), $repositories, true)) {
                    unset($matches[$index]);
                    continue;
                }
                // skip providers/replacers
                if ($match->getName() !== $package->getName()) {
                    unset($matches[$index]);
                    continue;
                }
                $matches[$index] = $match->getId();
            }
            // select preferred package according to policy rules
            if ($matches && $matches = $policy->selectPreferredPackages($pool, array(), $matches)) {
                $newPackage = $pool->literalToPackage($matches[0]);
                // update the dist and source URLs
                $package->setSourceUrl($newPackage->getSourceUrl());
                // only update dist url for github/bitbucket dists as they use a combination of dist url + dist reference to install
                // but for other urls this is ambiguous and could result in bad outcomes
                if (preg_match('{^https?://(?:(?:www\.)?bitbucket\.org|(api\.)?github\.com)/}', $newPackage->getDistUrl())) {
                    $package->setDistUrl($newPackage->getDistUrl());
                }
            }
        }
    }
    private function aliasPlatformPackages(PlatformRepository $platformRepo, $aliases)
    {
        foreach ($aliases as $package => $versions) {
@ -989,7 +1090,7 @@ class Installer
            }
            if (count($depPackages) == 0 && !$nameMatchesRequiredPackage && !in_array($packageName, array('nothing', 'lock'))) {
-                $this->io->write('<warning>Package "' . $packageName . '" listed for update is not installed. Ignoring.</warning>');
+                $this->io->writeError('<warning>Package "' . $packageName . '" listed for update is not installed. Ignoring.</warning>');
            }
            foreach ($depPackages as $depPackage) {
@ -1166,7 +1267,6 @@ class Installer
        return $this;
    }
    /**
     * set whether to run autoloader or not
     *
@ -1180,7 +1280,6 @@ class Installer
        return $this;
    }
    /**
     * set whether to run scripts or not
     *
@ -1271,7 +1370,7 @@ class Installer
    }
    /**
-     * Should packages be prefered in a stable version when updating?
+     * Should packages be preferred in a stable version when updating?
     *
     * @param  boolean   $preferStable
     * @return Installer
@ -1284,7 +1383,7 @@ class Installer
    }
    /**
-     * Should packages be prefered in a lowest version when updating?
+     * Should packages be preferred in a lowest version when updating?
     *
     * @param  boolean   $preferLowest
     * @return Installer
--- a/src/Composer/Installer/InstallerEvent.php
+++ b/src/Composer/Installer/InstallerEvent.php
@ -38,6 +38,11 @@ class InstallerEvent extends Event
     */
    private $io;
    /**
     * @var bool
     */
    private $devMode;
    /**
     * @var PolicyInterface
     */
@ -69,18 +74,20 @@ class InstallerEvent extends Event
     * @param string               $eventName
     * @param Composer             $composer
     * @param IOInterface          $io
     * @param bool                 $devMode
     * @param PolicyInterface      $policy
     * @param Pool                 $pool
     * @param CompositeRepository  $installedRepo
     * @param Request              $request
     * @param OperationInterface[] $operations
     */
-    public function __construct($eventName, Composer $composer, IOInterface $io, PolicyInterface $policy, Pool $pool, CompositeRepository $installedRepo, Request $request, array $operations = array())
+    public function __construct($eventName, Composer $composer, IOInterface $io, $devMode, PolicyInterface $policy, Pool $pool, CompositeRepository $installedRepo, Request $request, array $operations = array())
    {
        parent::__construct($eventName);
        $this->composer = $composer;
        $this->io = $io;
        $this->devMode = $devMode;
        $this->policy = $policy;
        $this->pool = $pool;
        $this->installedRepo = $installedRepo;
@ -104,6 +111,14 @@ class InstallerEvent extends Event
        return $this->io;
    }
    /**
     * @return bool
     */
    public function isDevMode()
    {
        return $this->devMode;
    }
    /**
     * @return PolicyInterface
     */
--- a/src/Composer/Installer/LibraryInstaller.php
+++ b/src/Composer/Installer/LibraryInstaller.php
@ -197,7 +197,7 @@ class LibraryInstaller implements InstallerInterface
        foreach ($binaries as $bin) {
            $binPath = $this->getInstallPath($package).'/'.$bin;
            if (!file_exists($binPath)) {
-                $this->io->write('    <warning>Skipped installation of bin '.$bin.' for package '.$package->getName().': file not found in package</warning>');
+                $this->io->writeError('    <warning>Skipped installation of bin '.$bin.' for package '.$package->getName().': file not found in package</warning>');
                continue;
            }
@ -216,7 +216,7 @@ class LibraryInstaller implements InstallerInterface
                    // is a fresh install of the vendor.
                    @chmod($link, 0777 & ~umask());
                }
-                $this->io->write('    Skipped installation of bin '.$bin.' for package '.$package->getName().': name conflicts with an existing file');
+                $this->io->writeError('    Skipped installation of bin '.$bin.' for package '.$package->getName().': name conflicts with an existing file');
                continue;
            }
            if (defined('PHP_WINDOWS_VERSION_BUILD')) {
@ -226,7 +226,7 @@ class LibraryInstaller implements InstallerInterface
                    @chmod($link, 0777 & ~umask());
                    $link .= '.bat';
                    if (file_exists($link)) {
-                        $this->io->write('    Skipped installation of bin '.$bin.'.bat proxy for package '.$package->getName().': a .bat proxy was already installed');
+                        $this->io->writeError('    Skipped installation of bin '.$bin.'.bat proxy for package '.$package->getName().': a .bat proxy was already installed');
                    }
                }
                if (!file_exists($link)) {
@ -239,7 +239,7 @@ class LibraryInstaller implements InstallerInterface
                    // when using it in smbfs mounted folder
                    $relativeBin = $this->filesystem->findShortestPath($link, $binPath);
                    chdir(dirname($link));
-                    if (false === symlink($relativeBin, $link)) {
+                    if (false === @symlink($relativeBin, $link)) {
                        throw new \ErrorException();
                    }
                } catch (\ErrorException $e) {
--- a/src/Composer/Installer/PackageEvent.php
+++ b/src/Composer/Installer/PackageEvent.php
@ -0,0 +1,66 @@
 <?php
 /*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
 namespace Composer\Installer;
 use Composer\Composer;
 use Composer\IO\IOInterface;
 use Composer\DependencyResolver\Operation\OperationInterface;
 use Composer\DependencyResolver\PolicyInterface;
 use Composer\DependencyResolver\Pool;
 use Composer\DependencyResolver\Request;
 use Composer\EventDispatcher\Event;
 use Composer\Repository\CompositeRepository;
 /**
 * The Package Event.
 *
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
 class PackageEvent extends InstallerEvent
 {
    /**
     * @var OperationInterface The package instance
     */
    private $operation;
    /**
     * Constructor.
     *
     * @param string               $eventName
     * @param Composer             $composer
     * @param IOInterface          $io
     * @param bool                 $devMode
     * @param PolicyInterface      $policy
     * @param Pool                 $pool
     * @param CompositeRepository  $installedRepo
     * @param Request              $request
     * @param OperationInterface[] $operations
     * @param OperationInterface   $operation
     */
    public function __construct($eventName, Composer $composer, IOInterface $io, $devMode, PolicyInterface $policy, Pool $pool, CompositeRepository $installedRepo, Request $request, array $operations, OperationInterface $operation)
    {
        parent::__construct($eventName, $composer, $io, $devMode, $policy, $pool, $installedRepo, $request, $operations);
        $this->operation = $operation;
    }
    /**
     * Returns the package instance.
     *
     * @return OperationInterface
     */
    public function getOperation()
    {
        return $this->operation;
    }
 }
--- a/src/Composer/Installer/PackageEvents.php
+++ b/src/Composer/Installer/PackageEvents.php
@ -0,0 +1,75 @@
 <?php
 /*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
 namespace Composer\Installer;
 /**
 * Package Events.
 *
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
 class PackageEvents
 {
    /**
     * The PRE_PACKAGE_INSTALL event occurs before a package is installed.
     *
     * The event listener method receives a Composer\Script\PackageEvent instance.
     *
     * @var string
     */
    const PRE_PACKAGE_INSTALL = 'pre-package-install';
    /**
     * The POST_PACKAGE_INSTALL event occurs after a package is installed.
     *
     * The event listener method receives a Composer\Script\PackageEvent instance.
     *
     * @var string
     */
    const POST_PACKAGE_INSTALL = 'post-package-install';
    /**
     * The PRE_PACKAGE_UPDATE event occurs before a package is updated.
     *
     * The event listener method receives a Composer\Script\PackageEvent instance.
     *
     * @var string
     */
    const PRE_PACKAGE_UPDATE = 'pre-package-update';
    /**
     * The POST_PACKAGE_UPDATE event occurs after a package is updated.
     *
     * The event listener method receives a Composer\Script\PackageEvent instance.
     *
     * @var string
     */
    const POST_PACKAGE_UPDATE = 'post-package-update';
    /**
     * The PRE_PACKAGE_UNINSTALL event occurs before a package has been uninstalled.
     *
     * The event listener method receives a Composer\Script\PackageEvent instance.
     *
     * @var string
     */
    const PRE_PACKAGE_UNINSTALL = 'pre-package-uninstall';
    /**
     * The POST_PACKAGE_UNINSTALL event occurs after a package has been uninstalled.
     *
     * The event listener method receives a Composer\Script\PackageEvent instance.
     *
     * @var string
     */
    const POST_PACKAGE_UNINSTALL = 'post-package-uninstall';
 }
--- a/src/Composer/Installer/PearInstaller.php
+++ b/src/Composer/Installer/PearInstaller.php
@ -76,7 +76,7 @@ class PearInstaller extends LibraryInstaller
        $pearExtractor->extractTo($this->getInstallPath($package), array('php' => '/', 'script' => '/bin', 'data' => '/data'), $vars);
        if ($this->io->isVerbose()) {
-            $this->io->write('    Cleaning up');
+            $this->io->writeError('    Cleaning up');
        }
        $this->filesystem->unlink($packageArchive);
    }
--- a/src/Composer/Json/JsonFile.php
+++ b/src/Composer/Json/JsonFile.php
@ -182,8 +182,11 @@ class JsonFile
     */
    public static function encode($data, $options = 448)
    {
-        if (version_compare(PHP_VERSION, '5.4', '>=')) {
+        if (PHP_VERSION_ID >= 50400) {
            $json = json_encode($data, $options);
            if (false === $json) {
                self::throwEncodeError(json_last_error());
            }
            //  compact brackets to follow recent php versions
            if (PHP_VERSION_ID < 50428 || (PHP_VERSION_ID >= 50500 && PHP_VERSION_ID < 50512) || (defined('JSON_C_VERSION') && version_compare(phpversion('json'), '1.3.6', '<'))) {
@ -195,6 +198,9 @@ class JsonFile
        }
        $json = json_encode($data);
        if (false === $json) {
            self::throwEncodeError(json_last_error());
        }
        $prettyPrint = (bool) ($options & self::JSON_PRETTY_PRINT);
        $unescapeUnicode = (bool) ($options & self::JSON_UNESCAPED_UNICODE);
@ -209,6 +215,34 @@ class JsonFile
        return $result;
    }
    /**
     * Throws an exception according to a given code with a customized message
     *
     * @param int $code return code of json_last_error function
     * @throws \RuntimeException
     */
    private static function throwEncodeError($code)
    {
        switch ($code) {
            case JSON_ERROR_DEPTH:
                $msg = 'Maximum stack depth exceeded';
                break;
            case JSON_ERROR_STATE_MISMATCH:
                $msg = 'Underflow or the modes mismatch';
                break;
            case JSON_ERROR_CTRL_CHAR:
                $msg = 'Unexpected control character found';
                break;
            case JSON_ERROR_UTF8:
                $msg = 'Malformed UTF-8 characters, possibly incorrectly encoded';
                break;
            default:
                $msg = 'Unknown error';
        }
        throw new \RuntimeException('JSON encoding failed: '.$msg);
    }
    /**
     * Parses json string and returns hash.
     *
@ -219,6 +253,9 @@ class JsonFile
     */
    public static function parseJson($json, $file = null)
    {
        if (null === $json) {
            return;
        }
        $data = json_decode($json, true);
        if (null === $data && JSON_ERROR_NONE !== json_last_error()) {
            self::validateSyntax($json, $file);
--- a/Show More
+++ b/Show More