This file is indexed.

/usr/share/php/Composer/Downloader/GitDownloader.php is in composer 1.6.3-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
<?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\Downloader;

use Composer\Config;
use Composer\IO\IOInterface;
use Composer\Package\PackageInterface;
use Composer\Util\Filesystem;
use Composer\Util\Git as GitUtil;
use Composer\Util\Platform;
use Composer\Util\ProcessExecutor;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
{
    private $hasStashedChanges = false;
    private $hasDiscardedChanges = false;
    private $gitUtil;

    public function __construct(IOInterface $io, Config $config, ProcessExecutor $process = null, Filesystem $fs = null)
    {
        parent::__construct($io, $config, $process, $fs);
        $this->gitUtil = new GitUtil($this->io, $this->config, $this->process, $this->filesystem);
    }

    /**
     * {@inheritDoc}
     */
    public function doDownload(PackageInterface $package, $path, $url)
    {
        GitUtil::cleanEnv();
        $path = $this->normalizePath($path);
        $cachePath = $this->config->get('cache-vcs-dir').'/'.preg_replace('{[^a-z0-9.]}i', '-', $url).'/';
        $ref = $package->getSourceReference();
        $flag = Platform::isWindows() ? '/D ' : '';

        // --dissociate option is only available since git 2.3.0-rc0
        $gitVersion = $this->gitUtil->getVersion();
        $msg = "Cloning ".$this->getShortHash($ref);

        $command = 'git clone --no-checkout %url% %path% && cd '.$flag.'%path% && git remote add composer %url% && git fetch composer';
        if ($gitVersion && version_compare($gitVersion, '2.3.0-rc0', '>=')) {
            $this->io->writeError('', true, IOInterface::DEBUG);
            $this->io->writeError(sprintf('    Cloning to cache at %s', ProcessExecutor::escape($cachePath)), true, IOInterface::DEBUG);
            try {
                $this->gitUtil->fetchRefOrSyncMirror($url, $cachePath, $ref);
                if (is_dir($cachePath)) {
                    $command =
                        'git clone --no-checkout %cachePath% %path% --dissociate --reference %cachePath% '
                        . '&& cd '.$flag.'%path% '
                        . '&& git remote set-url origin %url% && git remote add composer %url%';
                    $msg = "Cloning ".$this->getShortHash($ref).' from cache';
                }
            } catch (\RuntimeException $e) {
            }
        }
        $this->io->writeError($msg);

        $commandCallable = function ($url) use ($path, $command, $cachePath) {
            return str_replace(
                array('%url%', '%path%', '%cachePath%'),
                array(
                    ProcessExecutor::escape($url),
                    ProcessExecutor::escape($path),
                    ProcessExecutor::escape($cachePath),
                ),
                $command
            );
        };

        $this->gitUtil->runCommand($commandCallable, $url, $path, true);
        if ($url !== $package->getSourceUrl()) {
            $this->updateOriginUrl($path, $package->getSourceUrl());
        } else {
            $this->setPushUrl($path, $url);
        }

        if ($newRef = $this->updateToCommit($path, $ref, $package->getPrettyVersion(), $package->getReleaseDate())) {
            if ($package->getDistReference() === $package->getSourceReference()) {
                $package->setDistReference($newRef);
            }
            $package->setSourceReference($newRef);
        }
    }

    /**
     * {@inheritDoc}
     */
    public function doUpdate(PackageInterface $initial, PackageInterface $target, $path, $url)
    {
        GitUtil::cleanEnv();
        if (!$this->hasMetadataRepository($path)) {
            throw new \RuntimeException('The .git directory is missing from '.$path.', see https://getcomposer.org/commit-deps for more information');
        }

        $updateOriginUrl = false;
        if (
            0 === $this->process->execute('git remote -v', $output, $path)
            && preg_match('{^origin\s+(?P<url>\S+)}m', $output, $originMatch)
            && preg_match('{^composer\s+(?P<url>\S+)}m', $output, $composerMatch)
        ) {
            if ($originMatch['url'] === $composerMatch['url'] && $composerMatch['url'] !== $target->getSourceUrl()) {
                $updateOriginUrl = true;
            }
        }

        $ref = $target->getSourceReference();
        $this->io->writeError(" Checking out ".$this->getShortHash($ref));
        $command = 'git remote set-url composer %s && git rev-parse --quiet --verify %s || (git fetch composer && git fetch --tags composer)';

        $commandCallable = function ($url) use ($command, $ref) {
            return sprintf($command, ProcessExecutor::escape($url), ProcessExecutor::escape($ref.'^{commit}'));
        };

        $this->gitUtil->runCommand($commandCallable, $url, $path);
        if ($newRef = $this->updateToCommit($path, $ref, $target->getPrettyVersion(), $target->getReleaseDate())) {
            if ($target->getDistReference() === $target->getSourceReference()) {
                $target->setDistReference($newRef);
            }
            $target->setSourceReference($newRef);
        }

        if ($updateOriginUrl) {
            $this->updateOriginUrl($path, $target->getSourceUrl());
        }
    }

    /**
     * {@inheritDoc}
     */
    public function getLocalChanges(PackageInterface $package, $path)
    {
        GitUtil::cleanEnv();
        if (!$this->hasMetadataRepository($path)) {
            return;
        }

        $command = 'git status --porcelain --untracked-files=no';
        if (0 !== $this->process->execute($command, $output, $path)) {
            throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
        }

        return trim($output) ?: null;
    }

    public function getUnpushedChanges(PackageInterface $package, $path)
    {
        GitUtil::cleanEnv();
        $path = $this->normalizePath($path);
        if (!$this->hasMetadataRepository($path)) {
            return;
        }

        $command = 'git show-ref --head -d';
        if (0 !== $this->process->execute($command, $output, $path)) {
            throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
        }

        $refs = trim($output);
        if (!preg_match('{^([a-f0-9]+) HEAD$}mi', $refs, $match)) {
            // could not match the HEAD for some reason
            return;
        }

        $headRef = $match[1];
        if (!preg_match_all('{^'.$headRef.' refs/heads/(.+)$}mi', $refs, $matches)) {
            // not on a branch, we are either on a not-modified tag or some sort of detached head, so skip this
            return;
        }

        // use the first match as branch name for now
        $branch = $matches[1][0];
        $unpushedChanges = null;

        // do two passes, as if we find anything we want to fetch and then re-try
        for ($i = 0; $i <= 1; $i++) {
            // try to find the a matching branch name in the composer remote
            foreach ($matches[1] as $candidate) {
                if (preg_match('{^[a-f0-9]+ refs/remotes/((?:composer|origin)/'.preg_quote($candidate).')$}mi', $refs, $match)) {
                    $branch = $candidate;
                    $remoteBranch = $match[1];
                    break;
                }
            }

            // if it doesn't exist, then we assume it is an unpushed branch
            // this is bad as we have no reference point to do a diff so we just bail listing
            // the branch as being unpushed
            if (!isset($remoteBranch)) {
                $unpushedChanges = 'Branch ' . $branch . ' could not be found on the origin remote and appears to be unpushed';
            } else {
                $command = sprintf('git diff --name-status %s...%s --', $remoteBranch, $branch);
                if (0 !== $this->process->execute($command, $output, $path)) {
                    throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
                }

                $unpushedChanges = trim($output) ?: null;
            }

            // first pass and we found unpushed changes, fetch from both remotes to make sure we have up to date
            // remotes and then try again as outdated remotes can sometimes cause false-positives
            if ($unpushedChanges && $i === 0) {
                $this->process->execute('git fetch composer && git fetch origin', $output, $path);
            }

            // abort after first pass if we didn't find anything
            if (!$unpushedChanges) {
                break;
            }
        }

        return $unpushedChanges;
    }

    /**
     * {@inheritDoc}
     */
    protected function cleanChanges(PackageInterface $package, $path, $update)
    {
        GitUtil::cleanEnv();
        $path = $this->normalizePath($path);

        $unpushed = $this->getUnpushedChanges($package, $path);
        if ($unpushed && ($this->io->isInteractive() || $this->config->get('discard-changes') !== true)) {
            throw new \RuntimeException('Source directory ' . $path . ' has unpushed changes on the current branch: '."\n".$unpushed);
        }

        if (!$changes = $this->getLocalChanges($package, $path)) {
            return;
        }

        if (!$this->io->isInteractive()) {
            $discardChanges = $this->config->get('discard-changes');
            if (true === $discardChanges) {
                return $this->discardChanges($path);
            }
            if ('stash' === $discardChanges) {
                if (!$update) {
                    return parent::cleanChanges($package, $path, $update);
                }

                return $this->stashChanges($path);
            }

            return parent::cleanChanges($package, $path, $update);
        }

        $changes = array_map(function ($elem) {
            return '    '.$elem;
        }, preg_split('{\s*\r?\n\s*}', $changes));
        $this->io->writeError('    <error>The package has modified files:</error>');
        $this->io->writeError(array_slice($changes, 0, 10));
        if (count($changes) > 10) {
            $this->io->writeError('    <info>' . (count($changes) - 10) . ' more files modified, choose "v" to view the full list</info>');
        }

        while (true) {
            switch ($this->io->ask('    <info>Discard changes [y,n,v,d,'.($update ? 's,' : '').'?]?</info> ', '?')) {
                case 'y':
                    $this->discardChanges($path);
                    break 2;

                case 's':
                    if (!$update) {
                        goto help;
                    }

                    $this->stashChanges($path);
                    break 2;

                case 'n':
                    throw new \RuntimeException('Update aborted');

                case 'v':
                    $this->io->writeError($changes);
                    break;

                case 'd':
                    $this->viewDiff($path);
                    break;

                case '?':
                default:
                    help:
                    $this->io->writeError(array(
                        '    y - discard changes and apply the '.($update ? 'update' : 'uninstall'),
                        '    n - abort the '.($update ? 'update' : 'uninstall').' and let you manually clean things up',
                        '    v - view modified files',
                        '    d - view local modifications (diff)',
                    ));
                    if ($update) {
                        $this->io->writeError('    s - stash changes and try to reapply them after the update');
                    }
                    $this->io->writeError('    ? - print help');
                    break;
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    protected function reapplyChanges($path)
    {
        $path = $this->normalizePath($path);
        if ($this->hasStashedChanges) {
            $this->hasStashedChanges = false;
            $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());
            }
        }

        $this->hasDiscardedChanges = false;
    }

    /**
     * Updates the given path to the given commit ref
     *
     * @param  string            $path
     * @param  string            $reference
     * @param  string            $branch
     * @param  \DateTime         $date
     * @throws \RuntimeException
     * @return null|string       if a string is returned, it is the commit reference that was checked out if the original could not be found
     */
    protected function updateToCommit($path, $reference, $branch, $date)
    {
        $force = $this->hasDiscardedChanges || $this->hasStashedChanges ? '-f ' : '';

        // 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.
        $template = 'git checkout '.$force.'%s -- && git reset --hard %1$s --';
        $branch = preg_replace('{(?:^dev-|(?:\.x)?-dev$)}i', '', $branch);

        $branches = null;
        if (0 === $this->process->execute('git branch -r', $output, $path)) {
            $branches = $output;
        }

        // check whether non-commitish are branches or tags, and fetch branches with the remote name
        $gitRef = $reference;
        if (!preg_match('{^[a-f0-9]{40}$}', $reference)
            && $branches
            && preg_match('{^\s+composer/'.preg_quote($reference).'$}m', $branches)
        ) {
            $command = sprintf('git checkout '.$force.'-B %s %s -- && git reset --hard %2$s --', ProcessExecutor::escape($branch), ProcessExecutor::escape('composer/'.$reference));
            if (0 === $this->process->execute($command, $output, $path)) {
                return;
            }
        }

        // try to checkout branch by name and then reset it so it's on the proper branch name
        if (preg_match('{^[a-f0-9]{40}$}', $reference)) {
            // add 'v' in front of the branch if it was stripped when generating the pretty name
            if (!preg_match('{^\s+composer/'.preg_quote($branch).'$}m', $branches) && preg_match('{^\s+composer/v'.preg_quote($branch).'$}m', $branches)) {
                $branch = 'v' . $branch;
            }

            $command = sprintf('git checkout %s --', ProcessExecutor::escape($branch));
            $fallbackCommand = sprintf('git checkout '.$force.'-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));
                if (0 === $this->process->execute($command, $output, $path)) {
                    return;
                }
            }
        }

        $command = sprintf($template, ProcessExecutor::escape($gitRef));
        if (0 === $this->process->execute($command, $output, $path)) {
            return;
        }

        // reference was not found (prints "fatal: reference is not a tree: $ref")
        if (false !== strpos($this->process->getErrorOutput(), $reference)) {
            $this->io->writeError('    <warning>'.$reference.' is gone (history was rewritten?)</warning>');
        }

        throw new \RuntimeException(GitUtil::sanitizeUrl('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput()));
    }

    protected function updateOriginUrl($path, $url)
    {
        $this->process->execute(sprintf('git remote set-url origin %s', ProcessExecutor::escape($url)), $output, $path);
        $this->setPushUrl($path, $url);
    }

    protected function setPushUrl($path, $url)
    {
        // set push url for github projects
        if (preg_match('{^(?:https?|git)://'.GitUtil::getGitHubDomainsRegex($this->config).'/([^/]+)/([^/]+?)(?:\.git)?$}', $url, $match)) {
            $protocols = $this->config->get('github-protocols');
            $pushUrl = 'git@'.$match[1].':'.$match[2].'/'.$match[3].'.git';
            if (!in_array('ssh', $protocols, true)) {
                $pushUrl = 'https://' . $match[1] . '/'.$match[2].'/'.$match[3].'.git';
            }
            $cmd = sprintf('git remote set-url --push origin %s', ProcessExecutor::escape($pushUrl));
            $this->process->execute($cmd, $ignoredOutput, $path);
        }
    }

    /**
     * {@inheritDoc}
     */
    protected function getCommitLogs($fromReference, $toReference, $path)
    {
        $path = $this->normalizePath($path);
        $command = sprintf('git log %s..%s --pretty=format:"%%h - %%an: %%s"', $fromReference, $toReference);

        if (0 !== $this->process->execute($command, $output, $path)) {
            throw new \RuntimeException('Failed to execute ' . $command . "\n\n" . $this->process->getErrorOutput());
        }

        return $output;
    }

    /**
     * @param $path
     * @throws \RuntimeException
     */
    protected function discardChanges($path)
    {
        $path = $this->normalizePath($path);
        if (0 !== $this->process->execute('git reset --hard', $output, $path)) {
            throw new \RuntimeException("Could not reset changes\n\n:".$this->process->getErrorOutput());
        }

        $this->hasDiscardedChanges = true;
    }

    /**
     * @param $path
     * @throws \RuntimeException
     */
    protected function stashChanges($path)
    {
        $path = $this->normalizePath($path);
        if (0 !== $this->process->execute('git stash --include-untracked', $output, $path)) {
            throw new \RuntimeException("Could not stash changes\n\n:".$this->process->getErrorOutput());
        }

        $this->hasStashedChanges = true;
    }

    /**
     * @param $path
     * @throws \RuntimeException
     */
    protected function viewDiff($path)
    {
        $path = $this->normalizePath($path);
        if (0 !== $this->process->execute('git diff HEAD', $output, $path)) {
            throw new \RuntimeException("Could not view diff\n\n:".$this->process->getErrorOutput());
        }

        $this->io->writeError($output);
    }

    protected function normalizePath($path)
    {
        if (Platform::isWindows() && strlen($path) > 0) {
            $basePath = $path;
            $removed = array();

            while (!is_dir($basePath) && $basePath !== '\\') {
                array_unshift($removed, basename($basePath));
                $basePath = dirname($basePath);
            }

            if ($basePath === '\\') {
                return $path;
            }

            $path = rtrim(realpath($basePath) . '/' . implode('/', $removed), '/');
        }

        return $path;
    }

    /**
     * {@inheritDoc}
     */
    protected function hasMetadataRepository($path)
    {
        $path = $this->normalizePath($path);

        return is_dir($path.'/.git');
    }

    protected function getShortHash($reference)
    {
        if (!$this->io->isVerbose() && preg_match('{^[0-9a-f]{40}$}', $reference)) {
            return substr($reference, 0, 10);
        }

        return $reference;
    }
}