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| 1 | <?php |
| 2 | /** |
| 3 | * @license GPL-2.0-or-later |
| 4 | * @file |
| 5 | */ |
| 6 | |
| 7 | namespace MediaWiki\Utils; |
| 8 | |
| 9 | use MediaWiki\Config\ServiceOptions; |
| 10 | use MediaWiki\HookContainer\HookRunner; |
| 11 | use MediaWiki\Json\FormatJson; |
| 12 | use MediaWiki\Logger\LoggerFactory; |
| 13 | use MediaWiki\MainConfigNames; |
| 14 | use MediaWiki\MediaWikiServices; |
| 15 | use MediaWiki\Shell\Shell; |
| 16 | use Psr\Log\LoggerInterface; |
| 17 | use RuntimeException; |
| 18 | |
| 19 | /** |
| 20 | * Fetch status information from a local git repository |
| 21 | * |
| 22 | * This is used by Special:Version. It can also be used by developers |
| 23 | * in their LocalSettings.php to ease testing of a branch you work on |
| 24 | * for a longer period of time. For example: |
| 25 | * |
| 26 | * if ( GitInfo::currentBranch() === 'myrewriteproject' ) { |
| 27 | * } |
| 28 | * |
| 29 | * @newable |
| 30 | * @note marked as newable in 1.35 for lack of a better alternative, |
| 31 | * but should become a stateless service eventually. |
| 32 | */ |
| 33 | class GitInfo { |
| 34 | |
| 35 | /** @var self|null Singleton for the repo at $IP */ |
| 36 | protected static $repo = null; |
| 37 | |
| 38 | /** @var string|null Location of the .git directory */ |
| 39 | protected $basedir; |
| 40 | |
| 41 | /** @var string Location of the repository */ |
| 42 | protected $repoDir; |
| 43 | |
| 44 | /** @var string|null Path to JSON cache file for pre-computed git information */ |
| 45 | protected $cacheFile; |
| 46 | |
| 47 | /** @var array Cached git information */ |
| 48 | protected $cache = []; |
| 49 | |
| 50 | /** |
| 51 | * @var array|false Map of repo URLs to viewer URLs. Access via method getViewers(). |
| 52 | */ |
| 53 | private static $viewers = false; |
| 54 | |
| 55 | /** Configuration options needed */ |
| 56 | private const CONSTRUCTOR_OPTIONS = [ |
| 57 | MainConfigNames::CacheDirectory, |
| 58 | MainConfigNames::GitBin, |
| 59 | MainConfigNames::GitInfoCacheDirectory, |
| 60 | MainConfigNames::GitRepositoryViewers, |
| 61 | ]; |
| 62 | |
| 63 | private LoggerInterface $logger; |
| 64 | private ServiceOptions $options; |
| 65 | private HookRunner $hookRunner; |
| 66 | |
| 67 | /** |
| 68 | * @stable to call |
| 69 | * @param string $repoDir The root directory of the repo where .git can be found |
| 70 | * @param bool $usePrecomputed Use precomputed information if available |
| 71 | * @see precomputeValues |
| 72 | */ |
| 73 | public function __construct( $repoDir, $usePrecomputed = true ) { |
| 74 | $this->repoDir = $repoDir; |
| 75 | $services = MediaWikiServices::getInstance(); |
| 76 | $this->options = new ServiceOptions( |
| 77 | self::CONSTRUCTOR_OPTIONS, $services->getMainConfig() |
| 78 | ); |
| 79 | $this->options->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS ); |
| 80 | // $this->options must be set before using getCacheFilePath() |
| 81 | $this->cacheFile = $this->getCacheFilePath( $repoDir ); |
| 82 | $this->logger = LoggerFactory::getInstance( 'gitinfo' ); |
| 83 | $this->logger->debug( |
| 84 | "Candidate cacheFile={$this->cacheFile} for {$repoDir}" |
| 85 | ); |
| 86 | $this->hookRunner = new HookRunner( $services->getHookContainer() ); |
| 87 | if ( $usePrecomputed && |
| 88 | $this->cacheFile !== null && |
| 89 | is_readable( $this->cacheFile ) |
| 90 | ) { |
| 91 | $this->cache = FormatJson::decode( |
| 92 | file_get_contents( $this->cacheFile ), |
| 93 | true |
| 94 | ); |
| 95 | $this->logger->debug( "Loaded git data from cache for {$repoDir}" ); |
| 96 | } |
| 97 | |
| 98 | if ( !$this->cacheIsComplete() ) { |
| 99 | $this->logger->debug( "Cache incomplete for {$repoDir}" ); |
| 100 | $this->basedir = $repoDir . DIRECTORY_SEPARATOR . '.git'; |
| 101 | if ( is_readable( $this->basedir ) && !is_dir( $this->basedir ) ) { |
| 102 | $GITfile = file_get_contents( $this->basedir ); |
| 103 | if ( strlen( $GITfile ) > 8 && |
| 104 | substr( $GITfile, 0, 8 ) === 'gitdir: ' |
| 105 | ) { |
| 106 | $path = rtrim( substr( $GITfile, 8 ), "\r\n" ); |
| 107 | if ( $path[0] === '/' || substr( $path, 1, 1 ) === ':' ) { |
| 108 | // Path from GITfile is absolute |
| 109 | $this->basedir = $path; |
| 110 | } else { |
| 111 | $this->basedir = $repoDir . DIRECTORY_SEPARATOR . $path; |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Compute the path to the cache file for a given directory. |
| 120 | * |
| 121 | * @param string $repoDir The root directory of the repo where .git can be found |
| 122 | * @return string Path to GitInfo cache file in $wgGitInfoCacheDirectory or |
| 123 | * fallback in the extension directory itself |
| 124 | * @since 1.24 |
| 125 | */ |
| 126 | private function getCacheFilePath( $repoDir ) { |
| 127 | $gitInfoCacheDirectory = $this->options->get( MainConfigNames::GitInfoCacheDirectory ); |
| 128 | if ( $gitInfoCacheDirectory === false ) { |
| 129 | $gitInfoCacheDirectory = $this->options->get( MainConfigNames::CacheDirectory ) . '/gitinfo'; |
| 130 | } |
| 131 | if ( $gitInfoCacheDirectory ) { |
| 132 | // Convert both MW_INSTALL_PATH and $repoDir to canonical paths |
| 133 | $repoName = realpath( $repoDir ); |
| 134 | if ( $repoName === false ) { |
| 135 | // Unit tests use fake path names |
| 136 | $repoName = $repoDir; |
| 137 | } |
| 138 | $realIP = realpath( MW_INSTALL_PATH ); |
| 139 | if ( str_starts_with( $repoName, $realIP ) ) { |
| 140 | // Strip MW_INSTALL_PATH from path |
| 141 | $repoName = substr( $repoName, strlen( $realIP ) ); |
| 142 | } |
| 143 | // Transform git repo path to something we can safely embed in a filename |
| 144 | // Windows supports both backslash and forward slash, ensure both are substituted. |
| 145 | $repoName = strtr( $repoName, [ '/' => '-' ] ); |
| 146 | $repoName = strtr( $repoName, [ DIRECTORY_SEPARATOR => '-' ] ); |
| 147 | $fileName = 'info' . $repoName . '.json'; |
| 148 | $cachePath = "{$gitInfoCacheDirectory}/{$fileName}"; |
| 149 | if ( is_readable( $cachePath ) ) { |
| 150 | return $cachePath; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | return "$repoDir/gitinfo.json"; |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Get the singleton for the repo at MW_INSTALL_PATH |
| 159 | * |
| 160 | * @return GitInfo |
| 161 | */ |
| 162 | public static function repo() { |
| 163 | if ( self::$repo === null ) { |
| 164 | self::$repo = new self( MW_INSTALL_PATH ); |
| 165 | } |
| 166 | return self::$repo; |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Check if a string looks like a hex encoded SHA1 hash |
| 171 | * |
| 172 | * @param string $str The string to check |
| 173 | * @return bool Whether or not the string looks like a SHA1 |
| 174 | */ |
| 175 | public static function isSHA1( $str ) { |
| 176 | return (bool)preg_match( '/^[0-9A-F]{40}$/i', $str ); |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Get the HEAD of the repo (without any opening "ref: ") |
| 181 | * |
| 182 | * @return string|false The HEAD (git reference or SHA1) or false |
| 183 | */ |
| 184 | public function getHead() { |
| 185 | if ( !isset( $this->cache['head'] ) ) { |
| 186 | $headFile = "{$this->basedir}/HEAD"; |
| 187 | $head = false; |
| 188 | |
| 189 | if ( is_readable( $headFile ) ) { |
| 190 | $head = file_get_contents( $headFile ); |
| 191 | |
| 192 | if ( preg_match( "/ref: (.*)/", $head, $m ) ) { |
| 193 | $head = rtrim( $m[1] ); |
| 194 | } else { |
| 195 | $head = rtrim( $head ); |
| 196 | } |
| 197 | } |
| 198 | $this->cache['head'] = $head; |
| 199 | } |
| 200 | return $this->cache['head']; |
| 201 | } |
| 202 | |
| 203 | /** |
| 204 | * Get the SHA1 for the current HEAD of the repo |
| 205 | * |
| 206 | * @return string|false A SHA1 or false |
| 207 | */ |
| 208 | public function getHeadSHA1() { |
| 209 | if ( !isset( $this->cache['headSHA1'] ) ) { |
| 210 | $head = $this->getHead(); |
| 211 | $sha1 = false; |
| 212 | |
| 213 | // If detached HEAD may be a SHA1 |
| 214 | if ( self::isSHA1( $head ) ) { |
| 215 | $sha1 = $head; |
| 216 | } else { |
| 217 | // If not a SHA1 it may be a ref: |
| 218 | $refFile = "{$this->basedir}/{$head}"; |
| 219 | $packedRefs = "{$this->basedir}/packed-refs"; |
| 220 | $headRegex = preg_quote( $head, '/' ); |
| 221 | if ( is_readable( $refFile ) ) { |
| 222 | $sha1 = rtrim( file_get_contents( $refFile ) ); |
| 223 | } elseif ( is_readable( $packedRefs ) && |
| 224 | preg_match( "/^([0-9A-Fa-f]{40}) $headRegex$/m", file_get_contents( $packedRefs ), $matches ) |
| 225 | ) { |
| 226 | $sha1 = $matches[1]; |
| 227 | } |
| 228 | } |
| 229 | $this->cache['headSHA1'] = $sha1; |
| 230 | } |
| 231 | return $this->cache['headSHA1']; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Get the commit date of HEAD entry of the git code repository |
| 236 | * |
| 237 | * @since 1.22 |
| 238 | * @return int|false Commit date (UNIX timestamp) or false |
| 239 | */ |
| 240 | public function getHeadCommitDate() { |
| 241 | $gitBin = $this->options->get( MainConfigNames::GitBin ); |
| 242 | |
| 243 | if ( !isset( $this->cache['headCommitDate'] ) ) { |
| 244 | $date = false; |
| 245 | |
| 246 | // Suppress warnings about any open_basedir restrictions affecting $wgGitBin (T74445). |
| 247 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 248 | $isFile = @is_file( $gitBin ); |
| 249 | if ( $isFile && |
| 250 | is_executable( $gitBin ) && |
| 251 | !Shell::isDisabled() && |
| 252 | $this->getHead() !== false |
| 253 | ) { |
| 254 | $cmd = [ |
| 255 | $gitBin, |
| 256 | 'show', |
| 257 | '-s', |
| 258 | '--format=format:%ct', |
| 259 | 'HEAD', |
| 260 | ]; |
| 261 | $gitDir = realpath( $this->basedir ); |
| 262 | $result = Shell::command( $cmd ) |
| 263 | ->environment( [ 'GIT_DIR' => $gitDir ] ) |
| 264 | ->restrict( Shell::RESTRICT_DEFAULT | Shell::NO_NETWORK ) |
| 265 | ->allowPath( $gitDir, $this->repoDir ) |
| 266 | ->execute(); |
| 267 | |
| 268 | if ( $result->getExitCode() === 0 ) { |
| 269 | $date = (int)$result->getStdout(); |
| 270 | } |
| 271 | } |
| 272 | $this->cache['headCommitDate'] = $date; |
| 273 | } |
| 274 | return $this->cache['headCommitDate']; |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Get the name of the current branch, or HEAD if not found |
| 279 | * |
| 280 | * @return string|false The branch name, HEAD, or false |
| 281 | */ |
| 282 | public function getCurrentBranch() { |
| 283 | if ( !isset( $this->cache['branch'] ) ) { |
| 284 | $branch = $this->getHead(); |
| 285 | if ( $branch && |
| 286 | preg_match( "#^refs/heads/(.*)$#", $branch, $m ) |
| 287 | ) { |
| 288 | $branch = $m[1]; |
| 289 | } |
| 290 | $this->cache['branch'] = $branch; |
| 291 | } |
| 292 | return $this->cache['branch']; |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Get an URL to a web viewer link to the HEAD revision. |
| 297 | * |
| 298 | * @return string|false String if a URL is available or false otherwise |
| 299 | */ |
| 300 | public function getHeadViewUrl() { |
| 301 | $url = $this->getRemoteUrl(); |
| 302 | if ( $url === false ) { |
| 303 | return false; |
| 304 | } |
| 305 | foreach ( $this->getViewers() as $repo => $viewer ) { |
| 306 | $pattern = '#^' . $repo . '$#'; |
| 307 | if ( preg_match( $pattern, $url, $matches ) ) { |
| 308 | $viewerUrl = preg_replace( $pattern, $viewer, $url ); |
| 309 | $headSHA1 = $this->getHeadSHA1(); |
| 310 | $replacements = [ |
| 311 | '%h' => substr( $headSHA1, 0, 7 ), |
| 312 | '%H' => $headSHA1, |
| 313 | '%r' => urlencode( $matches[1] ), |
| 314 | '%R' => $matches[1], |
| 315 | ]; |
| 316 | return strtr( $viewerUrl, $replacements ); |
| 317 | } |
| 318 | } |
| 319 | return false; |
| 320 | } |
| 321 | |
| 322 | /** |
| 323 | * Get the URL of the remote origin. |
| 324 | * @return string|false String if a URL is available or false otherwise. |
| 325 | */ |
| 326 | protected function getRemoteUrl() { |
| 327 | if ( !isset( $this->cache['remoteURL'] ) ) { |
| 328 | $config = "{$this->basedir}/config"; |
| 329 | $url = false; |
| 330 | if ( is_readable( $config ) ) { |
| 331 | // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged |
| 332 | $configArray = @parse_ini_file( $config, true ); |
| 333 | $remote = false; |
| 334 | |
| 335 | // Use the "origin" remote repo if available or any other repo if not. |
| 336 | if ( isset( $configArray['remote origin'] ) ) { |
| 337 | $remote = $configArray['remote origin']; |
| 338 | } elseif ( is_array( $configArray ) ) { |
| 339 | foreach ( $configArray as $sectionName => $sectionConf ) { |
| 340 | if ( str_starts_with( $sectionName, 'remote' ) ) { |
| 341 | $remote = $sectionConf; |
| 342 | } |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | if ( $remote !== false && isset( $remote['url'] ) ) { |
| 347 | $url = $remote['url']; |
| 348 | } |
| 349 | } |
| 350 | $this->cache['remoteURL'] = $url; |
| 351 | } |
| 352 | return $this->cache['remoteURL']; |
| 353 | } |
| 354 | |
| 355 | /** |
| 356 | * Check to see if the current cache is fully populated. |
| 357 | * |
| 358 | * Note: This method is public only to make unit testing easier. There's |
| 359 | * really no strong reason that anything other than a test should want to |
| 360 | * call this method. |
| 361 | * |
| 362 | * @return bool True if all expected cache keys exist, false otherwise |
| 363 | */ |
| 364 | public function cacheIsComplete() { |
| 365 | return isset( $this->cache['head'] ) && |
| 366 | isset( $this->cache['headSHA1'] ) && |
| 367 | isset( $this->cache['headCommitDate'] ) && |
| 368 | isset( $this->cache['branch'] ) && |
| 369 | isset( $this->cache['remoteURL'] ); |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * Precompute and cache git information. |
| 374 | * |
| 375 | * Creates a JSON file in the cache directory associated with this |
| 376 | * GitInfo instance. This cache file will be used by subsequent GitInfo objects referencing |
| 377 | * the same directory to avoid needing to examine the .git directory again. |
| 378 | * |
| 379 | * @since 1.24 |
| 380 | */ |
| 381 | public function precomputeValues() { |
| 382 | if ( $this->cacheFile !== null ) { |
| 383 | // Try to completely populate the cache |
| 384 | $this->getHead(); |
| 385 | $this->getHeadSHA1(); |
| 386 | $this->getHeadCommitDate(); |
| 387 | $this->getCurrentBranch(); |
| 388 | $this->getRemoteUrl(); |
| 389 | |
| 390 | if ( !$this->cacheIsComplete() ) { |
| 391 | $this->logger->debug( |
| 392 | "Failed to compute GitInfo for \"{$this->basedir}\"" |
| 393 | ); |
| 394 | return; |
| 395 | } |
| 396 | |
| 397 | $cacheDir = dirname( $this->cacheFile ); |
| 398 | if ( !file_exists( $cacheDir ) && |
| 399 | !wfMkdirParents( $cacheDir, null, __METHOD__ ) |
| 400 | ) { |
| 401 | throw new RuntimeException( "Unable to create GitInfo cache \"{$cacheDir}\"" ); |
| 402 | } |
| 403 | |
| 404 | file_put_contents( $this->cacheFile, FormatJson::encode( $this->cache ) ); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * @see self::getHeadSHA1 |
| 410 | * @return string |
| 411 | */ |
| 412 | public static function headSHA1() { |
| 413 | return self::repo()->getHeadSHA1(); |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * @see self::getCurrentBranch |
| 418 | * @return string |
| 419 | */ |
| 420 | public static function currentBranch() { |
| 421 | return self::repo()->getCurrentBranch(); |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * @see self::getHeadViewUrl() |
| 426 | * @return string|false |
| 427 | */ |
| 428 | public static function headViewUrl() { |
| 429 | return self::repo()->getHeadViewUrl(); |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Gets the list of repository viewers |
| 434 | * @return array |
| 435 | */ |
| 436 | private function getViewers() { |
| 437 | if ( self::$viewers === false ) { |
| 438 | self::$viewers = $this->options->get( MainConfigNames::GitRepositoryViewers ); |
| 439 | $this->hookRunner->onGitViewers( self::$viewers ); |
| 440 | } |
| 441 | |
| 442 | return self::$viewers; |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /** @deprecated class alias since 1.41 */ |
| 447 | class_alias( GitInfo::class, 'GitInfo' ); |