140 lines
5.2 KiB
Markdown
140 lines
5.2 KiB
Markdown
<!--
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tagline: Solving problems
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-->
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# Troubleshooting
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This is a list of common pitfalls on using Composer, and how to avoid them.
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## General
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1. Before asking anyone, run [`composer diagnose`](../03-cli.md#diagnose) to check
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for common problems. If it all checks out, proceed to the next steps.
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2. When facing any kind of problems using Composer, be sure to **work with the
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latest version**. See [self-update](../03-cli.md#self-update) for details.
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3. Make sure you have no problems with your setup by running the installer's
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checks via `curl -sS https://getcomposer.org/installer | php -- --check`.
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4. Ensure you're **installing vendors straight from your `composer.json`** via
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`rm -rf vendor && composer update -v` when troubleshooting, excluding any
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possible interferences with existing vendor installations or `composer.lock`
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entries.
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## Package not found
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1. Double-check you **don't have typos** in your `composer.json` or repository
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branches and tag names.
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2. Be sure to **set the right
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[minimum-stability](../04-schema.md#minimum-stability)**. To get started or be
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sure this is no issue, set `minimum-stability` to "dev".
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3. Packages **not coming from [Packagist](https://packagist.org/)** should
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always be **defined in the root package** (the package depending on all
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vendors).
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4. Use the **same vendor and package name** throughout all branches and tags of
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your repository, especially when maintaining a third party fork and using
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`replace`.
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## Package not found on travis-ci.org
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1. Check the ["Package not found"](#package-not-found) item above.
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2. If the package tested is a dependency of one of its dependencies (cyclic
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dependency), the problem might be that composer is not able to detect the version
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of the package properly. If it is a git clone it is generally alright and Composer
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will detect the version of the current branch, but travis does shallow clones so
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that process can fail when testing pull requests and feature branches in general.
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The best solution is to define the version you are on via an environment variable
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called COMPOSER_ROOT_VERSION. You set it to `dev-master` for example to define
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the root package's version as `dev-master`.
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Use: `before_script: COMPOSER_ROOT_VERSION=dev-master composer install` to export
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the variable for the call to composer.
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## Need to override a package version
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Let say your project depends on package A which in turn depends on a specific
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version of package B (say 0.1) and you need a different version of that
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package - version 0.11.
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You can fix this by aliasing version 0.11 to 0.1:
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composer.json:
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{
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"require": {
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"A": "0.2",
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"B": "0.11 as 0.1"
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}
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}
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See [aliases](aliases.md) for more information.
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## Memory limit errors
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If composer shows memory errors on some commands:
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PHP Fatal error: Allowed memory size of XXXXXX bytes exhausted <...>
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The PHP `memory_limit` should be increased.
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> **Note:** Composer internally increases the `memory_limit` to `512M`.
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> If you have memory issues when using composer, please consider [creating
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> an issue ticket](https://github.com/composer/composer/issues) so we can look into it.
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To get the current `memory_limit` value, run:
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php -r "echo ini_get('memory_limit').PHP_EOL;"
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Try increasing the limit in your `php.ini` file (ex. `/etc/php5/cli/php.ini` for
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Debian-like systems):
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; Use -1 for unlimited or define an explicit value like 512M
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memory_limit = -1
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Or, you can increase the limit with a command-line argument:
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php -d memory_limit=-1 composer.phar <...>
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## "The system cannot find the path specified" (Windows)
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1. Open regedit.
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2. Search for an ```AutoRun``` key inside ```HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor```
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or ```HKEY_CURRENT_USER\Software\Microsoft\Command Processor```.
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3. Check if it contains any path to non-existent file, if it's the case, just remove them.
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## API rate limit and two factor authentication
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Because of GitHub's rate limits on their API it can happen that Composer prompts
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for authentication asking your username and password so it can go ahead with its work.
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Unfortunately this will not work if you enabled two factor authentication on
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your GitHub account and to solve this issue you need to:
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1. [Create](https://github.com/settings/applications) an oauth token on GitHub.
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[Read more](https://github.com/blog/1509-personal-api-tokens) on this.
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2. Add it to the configuration running `composer config -g github-oauth.github.com <oauthtoken>`
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Now Composer should install/update without asking for authentication.
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## proc_open(): fork failed errors
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If composer shows proc_open() fork failed on some commands:
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PHP Fatal error: Uncaught exception 'ErrorException' with message 'proc_open(): fork failed - Cannot allocate memory' in phar
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This could be happening because the VPS runs out of memory and has no Swap space enabled.
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[root@my_tiny_vps htdocs]# free -m
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total used free shared buffers cached
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Mem: 2048 357 1690 0 0 237
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-/+ buffers/cache: 119 1928
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Swap: 0 0 0
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To enable the swap you can use for example:
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/bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
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/sbin/mkswap /var/swap.1
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/sbin/swapon /var/swap.1
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