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<?php |
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namespace Psalm\Provider; |
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use PhpParser; |
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class StatementsProvider |
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{ |
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/** |
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* @var FileProvider |
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*/ |
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private $file_provider; |
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/** |
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* @var ParserCacheProvider |
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*/ |
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private $cache_provider; |
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/** |
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* @var int |
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*/ |
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private $this_modified_time; |
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/** |
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* @var FileStorageCacheProvider |
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*/ |
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private $file_storage_cache_provider; |
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/** |
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* @var PhpParser\Parser|null |
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*/ |
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protected static $parser; |
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public function __construct( |
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FileProvider $file_provider, |
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ParserCacheProvider $cache_provider, |
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FileStorageCacheProvider $file_storage_cache_provider |
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) { |
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$this->file_provider = $file_provider; |
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$this->cache_provider = $cache_provider; |
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$this->this_modified_time = filemtime(__FILE__); |
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$this->file_storage_cache_provider = $file_storage_cache_provider; |
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} |
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/** |
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* @param string $file_path |
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* @param bool $debug_output |
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* |
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* @return array<int, \PhpParser\Node\Stmt> |
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*/ |
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public function getStatementsForFile($file_path, $debug_output = false) |
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{ |
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$from_cache = false; |
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$version = (string) PHP_PARSER_VERSION . $this->this_modified_time; |
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$file_contents = $this->file_provider->getContents($file_path); |
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$modified_time = $this->file_provider->getModifiedTime($file_path); |
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$file_content_hash = md5($version . $file_contents); |
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$file_cache_key = $this->cache_provider->getParserCacheKey($file_path, $this->cache_provider->use_igbinary); |
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$stmts = $this->cache_provider->loadStatementsFromCache( |
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$modified_time, |
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$file_content_hash, |
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$file_cache_key |
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); |
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if ($stmts === null) { |
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if ($debug_output) { |
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echo 'Parsing ' . $file_path . "\n"; |
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} |
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$stmts = self::parseStatements($file_contents); |
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$this->file_storage_cache_provider->removeCacheForFile($file_path); |
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} else { |
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$from_cache = true; |
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} |
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$this->cache_provider->saveStatementsToCache($file_cache_key, $file_content_hash, $stmts, $from_cache); |
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if (!$stmts) { |
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return []; |
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} |
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return $stmts; |
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} |
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/** |
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* @param string $file_contents |
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* |
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* @return array<int, \PhpParser\Node\Stmt> |
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*/ |
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public static function parseStatements($file_contents) |
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{ |
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if (!self::$parser) { |
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$lexer = version_compare(PHP_VERSION, '7.0.0dev', '>=') |
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? new PhpParser\Lexer([ |
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'usedAttributes' => [ |
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'comments', 'startLine', 'startFilePos', 'endFilePos', |
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], |
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]) |
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: new PhpParser\Lexer\Emulative([ |
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'usedAttributes' => [ |
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'comments', 'startLine', 'startFilePos', 'endFilePos', |
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], |
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]); |
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self::$parser = (new PhpParser\ParserFactory())->create(PhpParser\ParserFactory::PREFER_PHP7, $lexer); |
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} |
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$error_handler = new \PhpParser\ErrorHandler\Collecting(); |
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/** @var array<int, \PhpParser\Node\Stmt> */ |
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$stmts = self::$parser->parse($file_contents, $error_handler); |
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if (!$stmts && $error_handler->hasErrors()) { |
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foreach ($error_handler->getErrors() as $error) { |
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throw $error; |
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} |
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} |
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return $stmts; |
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} |
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} |
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vimeo /
psalm
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