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<?php declare(strict_types=1);
/*
* 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\Repository\Vcs;
use Composer\Pcre\Preg;
use Composer\Util\ProcessExecutor;
use Composer\Util\Filesystem;
use Composer\Util\Url;
use Composer\Util\Git as GitUtil;
use Composer\IO\IOInterface;
use Composer\Cache;
use Composer\Config;
/**
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class GitDriver extends VcsDriver
{
/** @var array<int|string, string> Map of tag name (can be turned to an int by php if it is a numeric name) to identifier */
protected $tags;
/** @var array<int|string, string> Map of branch name (can be turned to an int by php if it is a numeric name) to identifier */
protected $branches;
/** @var string */
protected $rootIdentifier;
/** @var string */
protected $repoDir;
/**
* @inheritDoc
*/
public function initialize(): void
{
if (Filesystem::isLocalPath($this->url)) {
$this->url = Preg::replace('{[\\/]\.git/?$}', '', $this->url);
if (!is_dir($this->url)) {
throw new \RuntimeException('Failed to read package information from '.$this->url.' as the path does not exist');
}
$this->repoDir = $this->url;
$cacheUrl = realpath($this->url);
} else {
if (!Cache::isUsable($this->config->get('cache-vcs-dir'))) {
throw new \RuntimeException('GitDriver requires a usable cache directory, and it looks like you set it to be disabled');
}
$this->repoDir = $this->config->get('cache-vcs-dir') . '/' . Preg::replace('{[^a-z0-9.]}i', '-', $this->url) . '/';
GitUtil::cleanEnv();
$fs = new Filesystem();
$fs->ensureDirectoryExists(dirname($this->repoDir));
if (!is_writable(dirname($this->repoDir))) {
throw new \RuntimeException('Can not clone '.$this->url.' to access package information. The "'.dirname($this->repoDir).'" directory is not writable by the current user.');
}
if (Preg::isMatch('{^ssh://[^@]+@[^:]+:[^0-9]+}', $this->url)) {
throw new \InvalidArgumentException('The source URL '.$this->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.');
}
$gitUtil = new GitUtil($this->io, $this->config, $this->process, $fs);
if (!$gitUtil->syncMirror($this->url, $this->repoDir)) {
if (!is_dir($this->repoDir)) {
throw new \RuntimeException('Failed to clone '.$this->url.' to read package information from it');
}
$this->io->writeError('<error>Failed to update '.$this->url.', package information from this repository may be outdated</error>');
}
$cacheUrl = $this->url;
}
$this->getTags();
$this->getBranches();
$this->cache = new Cache($this->io, $this->config->get('cache-repo-dir').'/'.Preg::replace('{[^a-z0-9.]}i', '-', Url::sanitize($cacheUrl)));
$this->cache->setReadOnly($this->config->get('cache-read-only'));
}
/**
* @inheritDoc
*/
public function getRootIdentifier(): string
{
if (null === $this->rootIdentifier) {
$this->rootIdentifier = 'master';
$gitUtil = new GitUtil($this->io, $this->config, $this->process, new Filesystem());
if (!Filesystem::isLocalPath($this->url)) {
$defaultBranch = $gitUtil->getMirrorDefaultBranch($this->url, $this->repoDir, false);
if ($defaultBranch !== null) {
return $this->rootIdentifier = $defaultBranch;
}
}
// select currently checked out branch as default branch
$this->process->execute('git branch --no-color', $output, $this->repoDir);
$branches = $this->process->splitLines($output);
if (!in_array('* master', $branches)) {
foreach ($branches as $branch) {
if ($branch && Preg::isMatchStrictGroups('{^\* +(\S+)}', $branch, $match)) {
$this->rootIdentifier = $match[1];
break;
}
}
}
}
return $this->rootIdentifier;
}
/**
* @inheritDoc
*/
public function getUrl(): string
{
return $this->url;
}
/**
* @inheritDoc
*/
public function getSource(string $identifier): array
{
return ['type' => 'git', 'url' => $this->getUrl(), 'reference' => $identifier];
}
/**
* @inheritDoc
*/
public function getDist(string $identifier): ?array
{
return null;
}
/**
* @inheritDoc
*/
public function getFileContent(string $file, string $identifier): ?string
{
if (isset($identifier[0]) && $identifier[0] === '-') {
throw new \RuntimeException('Invalid git identifier detected. Identifier must not start with a -, given: ' . $identifier);
}
$resource = sprintf('%s:%s', ProcessExecutor::escape($identifier), ProcessExecutor::escape($file));
$this->process->execute(sprintf('git show %s', $resource), $content, $this->repoDir);
if (!trim($content)) {
return null;
}
return $content;
}
/**
* @inheritDoc
*/
public function getChangeDate(string $identifier): ?\DateTimeImmutable
{
$this->process->execute(sprintf(
'git -c log.showSignature=false log -1 --format=%%at %s',
ProcessExecutor::escape($identifier)
), $output, $this->repoDir);
return new \DateTimeImmutable('@'.trim($output), new \DateTimeZone('UTC'));
}
/**
* @inheritDoc
*/
public function getTags(): array
{
if (null === $this->tags) {
$this->tags = [];
$this->process->execute('git show-ref --tags --dereference', $output, $this->repoDir);
foreach ($output = $this->process->splitLines($output) as $tag) {
if ($tag && Preg::isMatch('{^([a-f0-9]{40}) refs/tags/(\S+?)(\^\{\})?$}', $tag, $match)) {
$this->tags[$match[2]] = (string) $match[1];
}
}
}
return $this->tags;
}
/**
* @inheritDoc
*/
public function getBranches(): array
{
if (null === $this->branches) {
$branches = [];
$this->process->execute('git branch --no-color --no-abbrev -v', $output, $this->repoDir);
foreach ($this->process->splitLines($output) as $branch) {
if ($branch && !Preg::isMatch('{^ *[^/]+/HEAD }', $branch)) {
if (Preg::isMatchStrictGroups('{^(?:\* )? *(\S+) *([a-f0-9]+)(?: .*)?$}', $branch, $match) && $match[1][0] !== '-') {
$branches[$match[1]] = $match[2];
}
}
}
$this->branches = $branches;
}
return $this->branches;
}
/**
* @inheritDoc
*/
public static function supports(IOInterface $io, Config $config, string $url, bool $deep = false): bool
{
if (Preg::isMatch('#(^git://|\.git/?$|git(?:olite)?@|//git\.|//github.com/)#i', $url)) {
return true;
}
// local filesystem
if (Filesystem::isLocalPath($url)) {
$url = Filesystem::getPlatformPath($url);
if (!is_dir($url)) {
return false;
}
$process = new ProcessExecutor($io);
// check whether there is a git repo in that path
if ($process->execute('git tag', $output, $url) === 0) {
return true;
}
}
if (!$deep) {
return false;
}
$gitUtil = new GitUtil($io, $config, new ProcessExecutor($io), new Filesystem());
GitUtil::cleanEnv();
try {
$gitUtil->runCommand(static function ($url): string {
return 'git ls-remote --heads -- ' . ProcessExecutor::escape($url);
}, $url, sys_get_temp_dir());
} catch (\RuntimeException $e) {
return false;
}
return true;
}
}