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<?php |
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/** |
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* Function for caching between runs. |
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* |
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* @author Greg Sherwood <[email protected]> |
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* @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600) |
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* @license https://github.com/squizlabs/Symplify\PHP7_CodeSniffer/blob/master/licence.txt BSD Licence |
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*/ |
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namespace Symplify\PHP7_CodeSniffer\Util; |
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use Symplify\PHP7_CodeSniffer\Autoload; |
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use Symplify\PHP7_CodeSniffer\Config; |
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use Symplify\PHP7_CodeSniffer\Ruleset; |
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use Symplify\PHP7_CodeSniffer\Util\Common; |
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class Cache |
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{ |
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/** |
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* The filesystem location of the cache file. |
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* |
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* @var void |
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*/ |
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private static $path = ''; |
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/** |
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* The cached data. |
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* |
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* @var array<string, mixed> |
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*/ |
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private static $cache = array(); |
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/** |
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* Loads existing cache data for the run, if any. |
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* |
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* @param \Symplify\PHP7_CodeSniffer\Ruleset $ruleset The ruleset used for the run. |
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* @param \Symplify\PHP7_CodeSniffer\Config $config The config data for the run. |
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* |
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* @return void |
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*/ |
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public static function load(Ruleset $ruleset, Config $config) |
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{ |
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// Look at every loaded sniff class so far and use their file contents |
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// to generate a hash for the code used during the run. |
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// At this point, the loaded class list contains the core PHPCS code |
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// and all sniffs that have been loaded as part of the run. |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo PHP_EOL."\tGenerating loaded file list for code hash".PHP_EOL; |
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} |
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$codeHash = ''; |
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$classes = array_keys(Autoload::getLoadedClasses()); |
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sort($classes); |
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$installDir = dirname(__DIR__); |
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$installDirLen = strlen($installDir); |
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$standardDir = $installDir.DIRECTORY_SEPARATOR.'Standards'; |
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$standardDirLen = strlen($standardDir); |
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foreach ($classes as $file) { |
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if (substr($file, 0, $standardDirLen) !== $standardDir) { |
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if (substr($file, 0, $installDirLen) === $installDir) { |
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// We are only interested in sniffs here. |
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continue; |
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} |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t\t=> external file: $file".PHP_EOL; |
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} |
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} else if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t\t=> internal sniff: $file".PHP_EOL; |
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} |
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$codeHash .= md5_file($file); |
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} |
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// Add the content of the used rulesets to the hash so that sniff setting |
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// changes in the ruleset invalidate the cache. |
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$rulesets = $ruleset->paths; |
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sort($rulesets); |
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foreach ($rulesets as $file) { |
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if (substr($file, 0, $standardDirLen) !== $standardDir) { |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t\t=> external ruleset: $file".PHP_EOL; |
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} |
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} else if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t\t=> internal ruleset: $file".PHP_EOL; |
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} |
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$codeHash .= md5_file($file); |
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} |
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// Go through the core PHPCS code and add those files to the file |
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// hash. This ensures that core PHPCS changes will also invalidate the cache. |
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// Note that we ignore sniffs here, and any files that don't affect |
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// the outcome of the run. |
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$di = new \RecursiveIteratorIterator( |
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new \RecursiveDirectoryIterator($installDir), |
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0, |
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\RecursiveIteratorIterator::CATCH_GET_CHILD |
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); |
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$di = new \RecursiveDirectoryIterator($installDir); |
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$filter = new \RecursiveCallbackFilterIterator( |
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$di, |
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function ($file, $key, $iterator) { |
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// Skip hidden files. |
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$filename = $file->getFilename(); |
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if (substr($filename, 0, 1) === '.') { |
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return false; |
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} |
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$filePath = Common::realpath($file->getPathname()); |
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if ($filePath === false) { |
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return false; |
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} |
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if (is_dir($filePath) === true |
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&& ($filename === 'Standards' |
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|| $filename === 'Exceptions' |
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|| $filename === 'Reports' |
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|| $filename === 'Generators') |
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) { |
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return false; |
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} |
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return true; |
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} |
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); |
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$iterator = new \RecursiveIteratorIterator($filter); |
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foreach ($iterator as $file) { |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t\t=> core file: $file".PHP_EOL; |
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} |
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$codeHash .= md5_file($file); |
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} |
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$codeHash = md5($codeHash); |
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// Along with the code hash, use various settings that can affect |
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// the results of a run to create a new hash. This hash will be used |
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// in the cache file name. |
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$rulesetHash = md5(var_export($ruleset->ignorePatterns, true).var_export($ruleset->includePatterns, true)); |
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$configData = array( |
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'tabWidth' => $config->tabWidth, |
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'encoding' => $config->encoding, |
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'recordErrors' => $config->recordErrors, |
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'codeHash' => $codeHash, |
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'rulesetHash' => $rulesetHash, |
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); |
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$configString = implode(',', $configData); |
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$cacheHash = substr(sha1($configString), 0, 12); |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\tGenerating cache key data".PHP_EOL; |
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echo "\t\t=> tabWidth: ".$configData['tabWidth'].PHP_EOL; |
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echo "\t\t=> encoding: ".$configData['encoding'].PHP_EOL; |
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echo "\t\t=> recordErrors: ".(int) $configData['recordErrors'].PHP_EOL; |
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echo "\t\t=> codeHash: ".$configData['codeHash'].PHP_EOL; |
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echo "\t\t=> rulesetHash: ".$configData['rulesetHash'].PHP_EOL; |
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echo "\t\t=> cacheHash: $cacheHash".PHP_EOL; |
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} |
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if ($config->cacheFile !== null) { |
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$cacheFile = $config->cacheFile; |
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} else { |
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// Determine the common paths for all files being checked. |
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// We can use this to locate an existing cache file, or to |
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// determine where to create a new one. |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\tChecking possible cache file paths".PHP_EOL; |
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} |
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$paths = array(); |
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foreach ($config->files as $file) { |
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$file = Common::realpath($file); |
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while ($file !== DIRECTORY_SEPARATOR) { |
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if (isset($paths[$file]) === false) { |
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$paths[$file] = 1; |
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} else { |
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$paths[$file]++; |
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} |
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$lastFile = $file; |
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$file = dirname($file); |
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if ($file === $lastFile) { |
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// Just in case something went wrong, |
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// we don't want to end up in an infinite loop. |
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break; |
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} |
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} |
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} |
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ksort($paths); |
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$paths = array_reverse($paths); |
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$numFiles = count($config->files); |
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$tmpDir = sys_get_temp_dir(); |
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$cacheFile = null; |
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foreach ($paths as $file => $count) { |
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if ($count !== $numFiles) { |
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unset($paths[$file]); |
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continue; |
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} |
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$fileHash = substr(sha1($file), 0, 12); |
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$testFile = $tmpDir.DIRECTORY_SEPARATOR."phpcs.$fileHash.$cacheHash.cache"; |
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if ($cacheFile === null) { |
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// This will be our default location if we can't find |
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// an existing file. |
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$cacheFile = $testFile; |
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} |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t\t=> $testFile".PHP_EOL; |
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echo "\t\t\t * based on shared location: $file *".PHP_EOL; |
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} |
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if (file_exists($testFile) === true) { |
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$cacheFile = $testFile; |
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break; |
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} |
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}//end foreach |
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if ($cacheFile === null) { |
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// Unlikely, but just in case $paths is empty for some reason. |
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$cacheFile = $tmpDir.DIRECTORY_SEPARATOR."phpcs.$cacheHash.cache"; |
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} |
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}//end if |
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self::$path = $cacheFile; |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t=> Using cache file: ".self::$path.PHP_EOL; |
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} |
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if (file_exists(self::$path) === true) { |
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self::$cache = json_decode(file_get_contents(self::$path), true); |
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// Verify the contents of the cache file. |
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if (self::$cache['config'] !== $configData) { |
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self::$cache = array(); |
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if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t* cache was invalid and has been cleared *".PHP_EOL; |
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} |
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} |
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} else if (PHP_CodeSniffer_VERBOSITY > 1) { |
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echo "\t* cache file does not exist *".PHP_EOL; |
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} |
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self::$cache['config'] = $configData; |
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}//end load() |
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/** |
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* Saves the current cache to the filesystem. |
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* |
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* @return void |
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*/ |
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public static function save() |
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{ |
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file_put_contents(self::$path, json_encode(self::$cache)); |
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}//end save() |
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/** |
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* Retrieves a single entry from the cache. |
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* |
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* @param string $key The key of the data to get. If NULL, |
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* everything in the cache is returned. |
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* |
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* @return mixed |
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*/ |
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public static function get($key=null) |
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{ |
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if ($key === null) { |
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return self::$cache; |
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} |
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if (isset(self::$cache[$key]) === true) { |
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return self::$cache[$key]; |
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} |
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return false; |
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}//end get() |
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/** |
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* Retrieves a single entry from the cache. |
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* |
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* @param string $key The key of the data to set. If NULL, |
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* sets the entire cache. |
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* @param mixed $value The value to set. |
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* |
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* @return void |
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*/ |
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public static function set($key, $value) |
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{ |
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if ($key === null) { |
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self::$cache = $value; |
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} else { |
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self::$cache[$key] = $value; |
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} |
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}//end set() |
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/** |
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* Retrieves the number of cache entries. |
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* |
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* @return int |
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*/ |
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public static function getSize() |
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{ |
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return (count(self::$cache) - 1); |
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}//end getSize() |
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}//end class |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.