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composer/src/Composer/Command/SelfUpdateCommand.php

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<?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;
use Composer\Composer;
use Composer\Factory;
use Composer\Config;
use Composer\Util\Filesystem;
use Composer\Util\Platform;
use Composer\SelfUpdate\Keys;
use Composer\SelfUpdate\Versions;
use Composer\IO\IOInterface;
use Composer\Downloader\FilesystemException;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Finder\Finder;
/**
* @author Igor Wiedler <igor@wiedler.ch>
* @author Kevin Ran <kran@adobe.com>
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class SelfUpdateCommand extends BaseCommand
{
const HOMEPAGE = 'getcomposer.org';
const OLD_INSTALL_EXT = '-old.phar';
protected function configure()
{
$this
->setName('self-update')
->setAliases(array('selfupdate'))
->setDescription('Updates composer.phar to the latest version.')
->setDefinition(array(
new InputOption('rollback', 'r', InputOption::VALUE_NONE, 'Revert to an older installation of composer'),
new InputOption('clean-backups', null, InputOption::VALUE_NONE, 'Delete old backups during an update. This makes the current version of composer the only backup available after the update'),
new InputArgument('version', InputArgument::OPTIONAL, 'The version to update to'),
new InputOption('no-progress', null, InputOption::VALUE_NONE, 'Do not output download progress.'),
new InputOption('update-keys', null, InputOption::VALUE_NONE, 'Prompt user for a key update'),
new InputOption('stable', null, InputOption::VALUE_NONE, 'Force an update to the stable channel'),
new InputOption('preview', null, InputOption::VALUE_NONE, 'Force an update to the preview channel'),
new InputOption('snapshot', null, InputOption::VALUE_NONE, 'Force an update to the snapshot channel'),
new InputOption('1', null, InputOption::VALUE_NONE, 'Force an update to the stable channel, but only use 1.x versions'),
new InputOption('2', null, InputOption::VALUE_NONE, 'Force an update to the stable channel, but only use 2.x versions'),
new InputOption('set-channel-only', null, InputOption::VALUE_NONE, 'Only store the channel as the default one and then exit'),
))
->setHelp(
<<<EOT
The <info>self-update</info> command checks getcomposer.org for newer
versions of composer and if found, installs the latest.
<info>php composer.phar self-update</info>
Read more at https://getcomposer.org/doc/03-cli.md#self-update-selfupdate-
EOT
)
;
}
protected function execute(InputInterface $input, OutputInterface $output)
{
$config = Factory::createConfig();
if ($config->get('disable-tls') === true) {
$baseUrl = 'http://' . self::HOMEPAGE;
} else {
$baseUrl = 'https://' . self::HOMEPAGE;
}
$io = $this->getIO();
$remoteFilesystem = Factory::createRemoteFilesystem($io, $config);
$versionsUtil = new Versions($config, $remoteFilesystem);
// switch channel if requested
$requestedChannel = null;
foreach (Versions::$channels as $channel) {
if ($input->getOption($channel)) {
$requestedChannel = $channel;
$versionsUtil->setChannel($channel);
break;
}
}
if ($input->getOption('set-channel-only')) {
return 0;
}
$cacheDir = $config->get('cache-dir');
$rollbackDir = $config->get('data-dir');
$home = $config->get('home');
$localFilename = realpath($_SERVER['argv'][0]) ?: $_SERVER['argv'][0];
if ($input->getOption('update-keys')) {
return $this->fetchKeys($io, $config);
}
// ensure composer.phar location is accessible
if (!file_exists($localFilename)) {
throw new FilesystemException('Composer update failed: the "'.$localFilename.'" is not accessible');
}
// check if current dir is writable and if not try the cache dir from settings
$tmpDir = is_writable(dirname($localFilename)) ? dirname($localFilename) : $cacheDir;
// check for permissions in local filesystem before start connection process
if (!is_writable($tmpDir)) {
throw new FilesystemException('Composer update failed: the "'.$tmpDir.'" directory used to download the temp file could not be written');
}
// check if composer is running as the same user that owns the directory root, only if POSIX is defined and callable
if (function_exists('posix_getpwuid') && function_exists('posix_geteuid')) {
$composeUser = posix_getpwuid(posix_geteuid());
$homeOwner = posix_getpwuid(fileowner($home));
if (isset($composeUser['name']) && isset($homeOwner['name']) && $composeUser['name'] !== $homeOwner['name']) {
$io->writeError('<warning>You are running composer as "'.$composeUser['name'].'", while "'.$home.'" is owned by "'.$homeOwner['name'].'"</warning>');
}
}
if ($input->getOption('rollback')) {
return $this->rollback($output, $rollbackDir, $localFilename);
}
$latest = $versionsUtil->getLatest();
$latestStable = $versionsUtil->getLatest('stable');
$latestVersion = $latest['version'];
$updateVersion = $input->getArgument('version') ?: $latestVersion;
if ($requestedChannel && is_numeric($requestedChannel) && substr($latestStable['version'], 0, 1) !== $requestedChannel) {
$io->writeError('<warning>Warning: You forced the install of '.$latestVersion.' via --'.$requestedChannel.', but '.$latestStable['version'].' is the latest stable version. Updating to it via composer self-update --stable is recommended.</warning>');
}
if (preg_match('{^[0-9a-f]{40}$}', $updateVersion) && $updateVersion !== $latestVersion) {
$io->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) {
$io->writeError(sprintf('<info>You are already using composer version %s (%s channel).</info>', $updateVersion, $versionsUtil->getChannel()));
// remove all backups except for the most recent, if any
if ($input->getOption('clean-backups')) {
$this->cleanBackups($rollbackDir, $this->getLastBackupVersion($rollbackDir));
}
return 0;
}
$tempFilename = $tmpDir . '/' . basename($localFilename, '.phar').'-temp.phar';
$backupFile = sprintf(
'%s/%s-%s%s',
$rollbackDir,
strtr(Composer::RELEASE_DATE, ' :', '_-'),
preg_replace('{^([0-9a-f]{7})[0-9a-f]{33}$}', '$1', Composer::VERSION),
self::OLD_INSTALL_EXT
);
$updatingToTag = !preg_match('{^[0-9a-f]{40}$}', $updateVersion);
$io->write(sprintf("Updating to version <info>%s</info> (%s channel).", $updateVersion, $versionsUtil->getChannel()));
$remoteFilename = $baseUrl . ($updatingToTag ? "/download/{$updateVersion}/composer.phar" : '/composer.phar');
$signature = $remoteFilesystem->getContents(self::HOMEPAGE, $remoteFilename.'.sig', false);
$io->writeError(' ', false);
$remoteFilesystem->copy(self::HOMEPAGE, $remoteFilename, $tempFilename, !$input->getOption('no-progress'));
$io->writeError('');
if (!file_exists($tempFilename) || !$signature) {
$io->writeError('<error>The download of the new composer version failed for an unexpected reason</error>');
return 1;
}
// verify phar signature
if (!extension_loaded('openssl') && $config->get('disable-tls')) {
$io->writeError('<warning>Skipping phar signature verification as you have disabled OpenSSL via config.disable-tls</warning>');
} else {
if (!extension_loaded('openssl')) {
throw new \RuntimeException('The openssl extension is required for phar signatures to be verified but it is not available. '
. 'If you can not enable the openssl extension, you can disable this error, at your own risk, by setting the \'disable-tls\' option to true.');
}
$sigFile = 'file://'.$home.'/' . ($updatingToTag ? 'keys.tags.pub' : 'keys.dev.pub');
if (!file_exists($sigFile)) {
file_put_contents(
$home.'/keys.dev.pub',
<<<DEVPUBKEY
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
DEVPUBKEY
);
file_put_contents(
$home.'/keys.tags.pub',
<<<TAGSPUBKEY
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----
TAGSPUBKEY
);
}
$pubkeyid = openssl_pkey_get_public($sigFile);
$algo = defined('OPENSSL_ALGO_SHA384') ? OPENSSL_ALGO_SHA384 : 'SHA384';
if (!in_array('sha384', array_map('strtolower', openssl_get_md_methods()))) {
throw new \RuntimeException('SHA384 is not supported by your openssl extension, could not verify the phar file integrity');
}
$signature = json_decode($signature, true);
$signature = base64_decode($signature['sha384']);
$verified = 1 === openssl_verify(file_get_contents($tempFilename), $signature, $pubkeyid, $algo);
openssl_free_key($pubkeyid);
if (!$verified) {
throw new \RuntimeException('The phar signature did not match the file you downloaded, this means your public keys are outdated or that the phar file is corrupt/has been modified');
}
}
// remove saved installations of composer
if ($input->getOption('clean-backups')) {
$this->cleanBackups($rollbackDir);
}
if (!$this->setLocalPhar($localFilename, $tempFilename, $backupFile)) {
@unlink($tempFilename);
return 1;
}
if (file_exists($backupFile)) {
$io->writeError(sprintf(
'Use <info>composer self-update --rollback</info> to return to version <comment>%s</comment>',
Composer::VERSION
));
} else {
$io->writeError('<warning>A backup of the current version could not be written to '.$backupFile.', no rollback possible</warning>');
}
return 0;
}
protected function fetchKeys(IOInterface $io, Config $config)
{
if (!$io->isInteractive()) {
throw new \RuntimeException('Public keys can not be fetched in non-interactive mode, please run Composer interactively');
}
$io->write('Open <info>https://composer.github.io/pubkeys.html</info> to find the latest keys');
$validator = function ($value) {
if (!preg_match('{^-----BEGIN PUBLIC KEY-----$}', trim($value))) {
throw new \UnexpectedValueException('Invalid input');
}
return trim($value)."\n";
};
$devKey = '';
while (!preg_match('{(-----BEGIN PUBLIC KEY-----.+?-----END PUBLIC KEY-----)}s', $devKey, $match)) {
$devKey = $io->askAndValidate('Enter Dev / Snapshot Public Key (including lines with -----): ', $validator);
while ($line = $io->ask('')) {
$devKey .= trim($line)."\n";
if (trim($line) === '-----END PUBLIC KEY-----') {
break;
}
}
}
file_put_contents($keyPath = $config->get('home').'/keys.dev.pub', $match[0]);
$io->write('Stored key with fingerprint: ' . Keys::fingerprint($keyPath));
$tagsKey = '';
while (!preg_match('{(-----BEGIN PUBLIC KEY-----.+?-----END PUBLIC KEY-----)}s', $tagsKey, $match)) {
$tagsKey = $io->askAndValidate('Enter Tags Public Key (including lines with -----): ', $validator);
while ($line = $io->ask('')) {
$tagsKey .= trim($line)."\n";
if (trim($line) === '-----END PUBLIC KEY-----') {
break;
}
}
}
file_put_contents($keyPath = $config->get('home').'/keys.tags.pub', $match[0]);
$io->write('Stored key with fingerprint: ' . Keys::fingerprint($keyPath));
$io->write('Public keys stored in '.$config->get('home'));
}
protected function rollback(OutputInterface $output, $rollbackDir, $localFilename)
{
$rollbackVersion = $this->getLastBackupVersion($rollbackDir);
if (!$rollbackVersion) {
throw new \UnexpectedValueException('Composer rollback failed: no installation to roll back to in "'.$rollbackDir.'"');
}
$oldFile = $rollbackDir . '/' . $rollbackVersion . self::OLD_INSTALL_EXT;
if (!is_file($oldFile)) {
throw new FilesystemException('Composer rollback failed: "'.$oldFile.'" could not be found');
}
if (!is_readable($oldFile)) {
throw new FilesystemException('Composer rollback failed: "'.$oldFile.'" could not be read');
}
$io = $this->getIO();
$io->writeError(sprintf("Rolling back to version <info>%s</info>.", $rollbackVersion));
if (!$this->setLocalPhar($localFilename, $oldFile)) {
return 1;
}
return 0;
}
/**
* Checks if the downloaded/rollback phar is valid then moves it
*
* @param string $localFilename The composer.phar location
* @param string $newFilename The downloaded or backup phar
* @param string $backupTarget The filename to use for the backup
* @throws \FilesystemException If the file cannot be moved
* @return bool Whether the phar is valid and has been moved
*/
protected function setLocalPhar($localFilename, $newFilename, $backupTarget = null)
{
$io = $this->getIO();
@chmod($newFilename, fileperms($localFilename));
// check phar validity
if (!$this->validatePhar($newFilename, $error)) {
$io->writeError('<error>The '.($backupTarget ? 'update' : 'backup').' file is corrupted ('.$error.')</error>');
if ($backupTarget) {
$io->writeError('<error>Please re-run the self-update command to try again.</error>');
}
return false;
}
// copy current file into backups dir
if ($backupTarget) {
@copy($localFilename, $backupTarget);
}
try {
rename($newFilename, $localFilename);
return true;
} catch (\Exception $e) {
// see if we can run this operation as an Admin on Windows
if (!is_writable(dirname($localFilename))
&& $io->isInteractive()
&& $this->isWindowsNonAdminUser()) {
return $this->tryAsWindowsAdmin($localFilename, $newFilename);
}
$action = 'Composer '.($backupTarget ? 'update' : 'rollback');
throw new FilesystemException($action.' failed: "'.$localFilename.'" could not be written.'.PHP_EOL.$e->getMessage());
}
}
protected function cleanBackups($rollbackDir, $except = null)
{
$finder = $this->getOldInstallationFinder($rollbackDir);
$io = $this->getIO();
$fs = new Filesystem;
foreach ($finder as $file) {
if ($except && $file->getBasename(self::OLD_INSTALL_EXT) === $except) {
continue;
}
$file = (string) $file;
$io->writeError('<info>Removing: '.$file.'</info>');
$fs->remove($file);
}
}
protected function getLastBackupVersion($rollbackDir)
{
$finder = $this->getOldInstallationFinder($rollbackDir);
$finder->sortByName();
$files = iterator_to_array($finder);
if (count($files)) {
return basename(end($files), self::OLD_INSTALL_EXT);
}
return false;
}
protected function getOldInstallationFinder($rollbackDir)
{
$finder = Finder::create()
->depth(0)
->files()
->name('*' . self::OLD_INSTALL_EXT)
->in($rollbackDir);
return $finder;
}
/**
* Validates the downloaded/backup phar file
*
* @param string $pharFile The downloaded or backup phar
* @param null|string $error Set by method on failure
*
* Code taken from getcomposer.org/installer. Any changes should be made
* there and replicated here
*
* @return bool If the operation succeeded
* @throws \Exception
*/
protected function validatePhar($pharFile, &$error)
{
if (ini_get('phar.readonly')) {
return true;
}
try {
// Test the phar validity
$phar = new \Phar($pharFile);
// Free the variable to unlock the file
unset($phar);
$result = true;
} catch (\Exception $e) {
if (!$e instanceof \UnexpectedValueException && !$e instanceof \PharException) {
throw $e;
}
$error = $e->getMessage();
$result = false;
}
return $result;
}
/**
* Returns true if this is a non-admin Windows user account
*
* @return bool
*/
protected function isWindowsNonAdminUser()
{
if (!Platform::isWindows()) {
return false;
}
// fltmc.exe manages filter drivers and errors without admin privileges
exec('fltmc.exe filters', $output, $exitCode);
return $exitCode !== 0;
}
/**
* Invokes a UAC prompt to update composer.phar as an admin
*
* Uses a .vbs script to elevate and run the cmd.exe move command.
*
* @param string $localFilename The composer.phar location
* @param string $newFilename The downloaded or backup phar
* @return bool Whether composer.phar has been updated
*/
protected function tryAsWindowsAdmin($localFilename, $newFilename)
{
$io = $this->getIO();
$io->writeError('<error>Unable to write "'.$localFilename.'". Access is denied.</error>');
$helpMessage = 'Please run the self-update command as an Administrator.';
$question = 'Complete this operation with Administrator privileges [<comment>Y,n</comment>]? ';
if (!$io->askConfirmation($question, false)) {
$io->writeError('<warning>Operation cancelled. '.$helpMessage.'</warning>');
return false;
}
$tmpFile = tempnam(sys_get_temp_dir(), '');
$script = $tmpFile.'.vbs';
rename($tmpFile, $script);
$checksum = hash_file('sha256', $newFilename);
// cmd's internal move is fussy about backslashes
$source = str_replace('/', '\\', $newFilename);
$destination = str_replace('/', '\\', $localFilename);
$vbs = <<<EOT
Set UAC = CreateObject("Shell.Application")
UAC.ShellExecute "cmd.exe", "/c move /y ""$source"" ""$destination""", "", "runas", 0
Wscript.Sleep(300)
EOT;
file_put_contents($script, $vbs);
exec('"'.$script.'"');
@unlink($script);
// see if the file was moved
if ($result = (hash_file('sha256', $localFilename) === $checksum)) {
$io->writeError('<info>Operation succeeded.</info>');
} else {
$io->writeError('<error>Operation failed (file not written). '.$helpMessage.'</error>');
};
return $result;
}
}
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