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Current File : /usr/share/php/Composer/Util/Git.php
<?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\Util;

use Composer\Config;
use Composer\IO\IOInterface;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class Git
{
    private static $version;

    /** @var IOInterface */
    protected $io;
    /** @var Config */
    protected $config;
    /** @var ProcessExecutor */
    protected $process;
    /** @var Filesystem */
    protected $filesystem;

    public function __construct(IOInterface $io, Config $config, ProcessExecutor $process, Filesystem $fs)
    {
        $this->io = $io;
        $this->config = $config;
        $this->process = $process;
        $this->filesystem = $fs;
    }

    public function runCommand($commandCallable, $url, $cwd, $initialClone = false)
    {
        // Ensure we are allowed to use this URL by config
        $this->config->prohibitUrlByConfig($url, $this->io);

        if ($initialClone) {
            $origCwd = $cwd;
            $cwd = null;
        }

        if (preg_match('{^ssh://[^@]+@[^:]+:[^0-9]+}', $url)) {
            throw new \InvalidArgumentException('The source URL ' . $url . ' is invalid, ssh URLs should have a port number after ":".' . "\n" . 'Use ssh://git@example.com:22/path or just git@example.com:path if you do not want to provide a password or custom port.');
        }

        if (!$initialClone) {
            // capture username/password from URL if there is one and we have no auth configured yet
            $this->process->execute('git remote -v', $output, $cwd);
            if (preg_match('{^(?:composer|origin)\s+https?://(.+):(.+)@([^/]+)}im', $output, $match) && !$this->io->hasAuthentication($match[3])) {
                $this->io->setAuthentication($match[3], rawurldecode($match[1]), rawurldecode($match[2]));
            }
        }

        $protocols = $this->config->get('github-protocols');
        if (!is_array($protocols)) {
            throw new \RuntimeException('Config value "github-protocols" must be an array, got ' . gettype($protocols));
        }
        // public github, autoswitch protocols
        if (preg_match('{^(?:https?|git)://' . self::getGitHubDomainsRegex($this->config) . '/(.*)}', $url, $match)) {
            $messages = array();
            foreach ($protocols as $protocol) {
                if ('ssh' === $protocol) {
                    $protoUrl = "git@" . $match[1] . ":" . $match[2];
                } else {
                    $protoUrl = $protocol . "://" . $match[1] . "/" . $match[2];
                }

                if (0 === $this->process->execute(call_user_func($commandCallable, $protoUrl), $ignoredOutput, $cwd)) {
                    return;
                }
                $messages[] = '- ' . $protoUrl . "\n" . preg_replace('#^#m', '  ', $this->process->getErrorOutput());
                if ($initialClone) {
                    $this->filesystem->removeDirectory($origCwd);
                }
            }

            // failed to checkout, first check git accessibility
            if (!$this->io->hasAuthentication($match[1]) && !$this->io->isInteractive()) {
                $this->throwException('Failed to clone ' . $url . ' via ' . implode(', ', $protocols) . ' protocols, aborting.' . "\n\n" . implode("\n", $messages), $url);
            }
        }

        // if we have a private github url and the ssh protocol is disabled then we skip it and directly fallback to https
        $bypassSshForGitHub = preg_match('{^git@' . self::getGitHubDomainsRegex($this->config) . ':(.+?)\.git$}i', $url) && !in_array('ssh', $protocols, true);

        $command = call_user_func($commandCallable, $url);

        $auth = null;
        if ($bypassSshForGitHub || 0 !== $this->process->execute($command, $ignoredOutput, $cwd)) {
            $errorMsg = $this->process->getErrorOutput();
            // private github repository without ssh key access, try https with auth
            if (preg_match('{^git@' . self::getGitHubDomainsRegex($this->config) . ':(.+?)\.git$}i', $url, $match)
                || preg_match('{^https?://' . self::getGitHubDomainsRegex($this->config) . '/(.*)}', $url, $match)
            ) {
                if (!$this->io->hasAuthentication($match[1])) {
                    $gitHubUtil = new GitHub($this->io, $this->config, $this->process);
                    $message = 'Cloning failed using an ssh key for authentication, enter your GitHub credentials to access private repos';

                    if (!$gitHubUtil->authorizeOAuth($match[1]) && $this->io->isInteractive()) {
                        $gitHubUtil->authorizeOAuthInteractively($match[1], $message);
                    }
                }

                if ($this->io->hasAuthentication($match[1])) {
                    $auth = $this->io->getAuthentication($match[1]);
                    $authUrl = 'https://' . rawurlencode($auth['username']) . ':' . rawurlencode($auth['password']) . '@' . $match[1] . '/' . $match[2] . '.git';
                    $command = call_user_func($commandCallable, $authUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        return;
                    }

                    $errorMsg = $this->process->getErrorOutput();
                }
            } elseif (preg_match('{^https://(bitbucket\.org)/(.*)(\.git)?$}U', $url, $match)) { //bitbucket oauth
                $bitbucketUtil = new Bitbucket($this->io, $this->config, $this->process);

                if (!$this->io->hasAuthentication($match[1])) {
                    $message = 'Enter your Bitbucket credentials to access private repos';

                    if (!$bitbucketUtil->authorizeOAuth($match[1]) && $this->io->isInteractive()) {
                        $bitbucketUtil->authorizeOAuthInteractively($match[1], $message);
                        $accessToken = $bitbucketUtil->getToken();
                        $this->io->setAuthentication($match[1], 'x-token-auth', $accessToken);
                    }
                } else { //We're authenticating with a locally stored consumer.
                    $auth = $this->io->getAuthentication($match[1]);

                    //We already have an access_token from a previous request.
                    if ($auth['username'] !== 'x-token-auth') {
                        $accessToken = $bitbucketUtil->requestToken($match[1], $auth['username'], $auth['password']);
                        if (! empty($accessToken)) {
                            $this->io->setAuthentication($match[1], 'x-token-auth', $accessToken);
                        }
                    }
                }

                if ($this->io->hasAuthentication($match[1])) {
                    $auth = $this->io->getAuthentication($match[1]);
                    $authUrl = 'https://' . rawurlencode($auth['username']) . ':' . rawurlencode($auth['password']) . '@' . $match[1] . '/' . $match[2] . '.git';

                    $command = call_user_func($commandCallable, $authUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        return;
                    }

                    $errorMsg = $this->process->getErrorOutput();
                } else { // Falling back to ssh
                    $sshUrl = 'git@bitbucket.org:' . $match[2] . '.git';
                    $this->io->writeError('    No bitbucket authentication configured. Falling back to ssh.');
                    $command = call_user_func($commandCallable, $sshUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        return;
                    }

                    $errorMsg = $this->process->getErrorOutput();
                }
            } elseif (
                preg_match('{^(git)@' . self::getGitLabDomainsRegex($this->config) . ':(.+?)\.git$}i', $url, $match)
                || preg_match('{^(https?)://' . self::getGitLabDomainsRegex($this->config) . '/(.*)}', $url, $match)
            ) {
                if ($match[1] === 'git') {
                    $match[1] = 'https';
                }

                if (!$this->io->hasAuthentication($match[2])) {
                    $gitLabUtil = new GitLab($this->io, $this->config, $this->process);
                    $message = 'Cloning failed, enter your GitLab credentials to access private repos';

                    if (!$gitLabUtil->authorizeOAuth($match[2]) && $this->io->isInteractive()) {
                        $gitLabUtil->authorizeOAuthInteractively($match[1], $match[2], $message);
                    }
                }

                if ($this->io->hasAuthentication($match[2])) {
                    $auth = $this->io->getAuthentication($match[2]);
                    if ($auth['password'] === 'private-token' || $auth['password'] === 'oauth2' || $auth['password'] === 'gitlab-ci-token') {
                        $authUrl = $match[1] . '://' . rawurlencode($auth['password']) . ':' . rawurlencode($auth['username']) . '@' . $match[2] . '/' . $match[3]; // swap username and password
                    } else {
                        $authUrl = $match[1] . '://' . rawurlencode($auth['username']) . ':' . rawurlencode($auth['password']) . '@' . $match[2] . '/' . $match[3];
                    }

                    $command = call_user_func($commandCallable, $authUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        return;
                    }

                    $errorMsg = $this->process->getErrorOutput();
                }
            } elseif ($this->isAuthenticationFailure($url, $match)) { // private non-github/gitlab/bitbucket repo that failed to authenticate
                if (strpos($match[2], '@')) {
                    list($authParts, $match[2]) = explode('@', $match[2], 2);
                }

                $storeAuth = false;
                if ($this->io->hasAuthentication($match[2])) {
                    $auth = $this->io->getAuthentication($match[2]);
                } elseif ($this->io->isInteractive()) {
                    $defaultUsername = null;
                    if (isset($authParts) && $authParts) {
                        if (false !== strpos($authParts, ':')) {
                            list($defaultUsername, ) = explode(':', $authParts, 2);
                        } else {
                            $defaultUsername = $authParts;
                        }
                    }

                    $this->io->writeError('    Authentication required (<info>' . $match[2] . '</info>):');
                    $auth = array(
                        'username' => $this->io->ask('      Username: ', $defaultUsername),
                        'password' => $this->io->askAndHideAnswer('      Password: '),
                    );
                    $storeAuth = $this->config->get('store-auths');
                }

                if ($auth) {
                    $authUrl = $match[1] . rawurlencode($auth['username']) . ':' . rawurlencode($auth['password']) . '@' . $match[2] . $match[3];

                    $command = call_user_func($commandCallable, $authUrl);
                    if (0 === $this->process->execute($command, $ignoredOutput, $cwd)) {
                        $this->io->setAuthentication($match[2], $auth['username'], $auth['password']);
                        $authHelper = new AuthHelper($this->io, $this->config);
                        $authHelper->storeAuth($match[2], $storeAuth);

                        return;
                    }

                    $errorMsg = $this->process->getErrorOutput();
                }
            }

            if ($initialClone) {
                $this->filesystem->removeDirectory($origCwd);
            }

            $this->throwException('Failed to execute ' . $command . "\n\n" . $errorMsg, $url);
        }
    }

    public function syncMirror($url, $dir)
    {
        // update the repo if it is a valid git repository
        if (is_dir($dir) && 0 === $this->process->execute('git rev-parse --git-dir', $output, $dir) && trim($output) === '.') {
            try {
                $commandCallable = function ($url) {
                    $sanitizedUrl = preg_replace('{://([^@]+?):(.+?)@}', '://', $url);

                    return sprintf('git remote set-url origin %s && git remote update --prune origin && git remote set-url origin %s', ProcessExecutor::escape($url), ProcessExecutor::escape($sanitizedUrl));
                };
                $this->runCommand($commandCallable, $url, $dir);
            } catch (\Exception $e) {
                $this->io->writeError('<error>Sync mirror failed: ' . $e->getMessage() . '</error>', true, IOInterface::DEBUG);

                return false;
            }

            return true;
        }

        // clean up directory and do a fresh clone into it
        $this->filesystem->removeDirectory($dir);

        $commandCallable = function ($url) use ($dir) {
            return sprintf('git clone --mirror %s %s', ProcessExecutor::escape($url), ProcessExecutor::escape($dir));
        };

        $this->runCommand($commandCallable, $url, $dir, true);

        return true;
    }

    public function fetchRefOrSyncMirror($url, $dir, $ref)
    {
        if ($this->checkRefIsInMirror($url, $dir, $ref)) {
            return true;
        }

        if ($this->syncMirror($url, $dir)) {
            return $this->checkRefIsInMirror($url, $dir, $ref);
        }

        return false;
    }

    private function checkRefIsInMirror($url, $dir, $ref)
    {
        if (is_dir($dir) && 0 === $this->process->execute('git rev-parse --git-dir', $output, $dir) && trim($output) === '.') {
            $escapedRef = ProcessExecutor::escape($ref.'^{commit}');
            $exitCode = $this->process->execute(sprintf('git rev-parse --quiet --verify %s', $escapedRef), $ignoredOutput, $dir);
            if ($exitCode === 0) {
                return true;
            }
        }

        return false;
    }

    private function isAuthenticationFailure($url, &$match)
    {
        if (!preg_match('{^(https?://)([^/]+)(.*)$}i', $url, $match)) {
            return false;
        }

        $authFailures = array(
            'fatal: Authentication failed',
            'remote error: Invalid username or password.',
            'error: 401 Unauthorized',
            'fatal: unable to access',
            'fatal: could not read Username',
        );

        $errorOutput = $this->process->getErrorOutput();
        foreach ($authFailures as $authFailure) {
            if (strpos($errorOutput, $authFailure) !== false) {
                return true;
            }
        }

        return false;
    }

    public static function cleanEnv()
    {
        if (PHP_VERSION_ID < 50400 && ini_get('safe_mode') && false === strpos(ini_get('safe_mode_allowed_env_vars'), 'GIT_ASKPASS')) {
            throw new \RuntimeException('safe_mode is enabled and safe_mode_allowed_env_vars does not contain GIT_ASKPASS, can not set env var. You can disable safe_mode with "-dsafe_mode=0" when running composer');
        }

        // added in git 1.7.1, prevents prompting the user for username/password
        if (getenv('GIT_ASKPASS') !== 'echo') {
            putenv('GIT_ASKPASS=echo');
            unset($_SERVER['GIT_ASKPASS']);
        }

        // clean up rogue git env vars in case this is running in a git hook
        if (getenv('GIT_DIR')) {
            putenv('GIT_DIR');
            unset($_SERVER['GIT_DIR']);
        }
        if (getenv('GIT_WORK_TREE')) {
            putenv('GIT_WORK_TREE');
            unset($_SERVER['GIT_WORK_TREE']);
        }

        // Run processes with predictable LANGUAGE
        if (getenv('LANGUAGE') !== 'C') {
            putenv('LANGUAGE=C');
        }

        // clean up env for OSX, see https://github.com/composer/composer/issues/2146#issuecomment-35478940
        putenv("DYLD_LIBRARY_PATH");
        unset($_SERVER['DYLD_LIBRARY_PATH']);
    }

    public static function getGitHubDomainsRegex(Config $config)
    {
        return '(' . implode('|', array_map('preg_quote', $config->get('github-domains'))) . ')';
    }

    public static function getGitLabDomainsRegex(Config $config)
    {
        return '(' . implode('|', array_map('preg_quote', $config->get('gitlab-domains'))) . ')';
    }

    public static function sanitizeUrl($message)
    {
        return preg_replace_callback('{://(?P<user>[^@]+?):(?P<password>.+?)@}', function ($m) {
            if (preg_match('{^[a-f0-9]{12,}$}', $m[1])) {
                return '://***:***@';
            }

            return '://' . $m[1] . ':***@';
        }, $message);
    }

    private function throwException($message, $url)
    {
        // git might delete a directory when it fails and php will not know
        clearstatcache();

        if (0 !== $this->process->execute('git --version', $ignoredOutput)) {
            throw new \RuntimeException(self::sanitizeUrl('Failed to clone ' . $url . ', git was not found, check that it is installed and in your PATH env.' . "\n\n" . $this->process->getErrorOutput()));
        }

        throw new \RuntimeException(self::sanitizeUrl($message));
    }

    /**
     * Retrieves the current git version.
     *
     * @return string|null The git version number.
     */
    public function getVersion()
    {
        if (isset(self::$version)) {
            return self::$version;
        }
        if (0 !== $this->process->execute('git --version', $output)) {
            return;
        }
        if (preg_match('/^git version (\d+(?:\.\d+)+)/m', $output, $matches)) {
            return self::$version = $matches[1];
        }
    }
}

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