Add tool to check OCP for missing @since tag

* gets executed in autotest.sh and fails if some PHPDoc is missing
* doesn't check classes/methods that are marked as @deprecated
* iterates over all .php files in lib/public

autotest.sh

@@ -89,6 +89,9 @@ if [ "$1" ]; then
 	fi
 fi
 
+# check for the presence of @since in all OCP methods
+$PHP tests/OCPSinceChecker.php
+
 # Back up existing (dev) config if one exists and backup not already there
 if [ -f config/config.php ] && [ ! -f config/config-autotest-backup.php ]; then
 	mv config/config.php config/config-autotest-backup.php

tests/OCPSinceChecker.php

@@ -0,0 +1,115 @@
+<?php
+/**
+ * @author Morris Jobke <hey@morrisjobke.de>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+
+require_once(dirname(__DIR__) . '/3rdparty/autoload.php');
+
+/**
+ * Class SinceTagCheckVisitor
+ *
+ * this class checks all methods for the presence of the @since tag
+ */
+class SinceTagCheckVisitor extends \PhpParser\NodeVisitorAbstract {
+
+	/** @var string */
+	protected $namespace = '';
+	/** @var string */
+	protected $className = '';
+	/** @var bool */
+	protected $deprecatedClass = false;
+
+	/** @var array */
+	protected $errors = [];
+
+	public function enterNode(\PhpParser\Node $node) {
+		if($this->deprecatedClass) {
+			return;
+		}
+
+		if($node instanceof \PhpParser\Node\Stmt\Namespace_) {
+			$this->namespace = $node->name;
+		}
+
+		if($node instanceof \PhpParser\Node\Stmt\Interface_ or
+			$node instanceof \PhpParser\Node\Stmt\Class_) {
+			$this->className = $node->name;
+
+			/** @var \PhpParser\Comment\Doc[] $comments */
+			$comments = $node->getAttribute('comments');
+			if(count($comments) !== 0) {
+				$comment = $comments[count($comments) - 1];
+				$text = $comment->getText();
+				if(strpos($text, '@deprecated') !== false) {
+					$this->deprecatedClass = true;
+				}
+			}
+		}
+
+		if($node instanceof \PhpParser\Node\Stmt\ClassMethod) {
+			/** @var \PhpParser\Node\Stmt\ClassMethod $node */
+			/** @var \PhpParser\Comment\Doc[] $comments */
+			$comments = $node->getAttribute('comments');
+
+			if(count($comments) === 0) {
+				$this->errors[] = 'PHPDoc is needed for ' . $this->namespace . '\\' . $this->className . '::' . $node->name;
+				return;
+			}
+			$comment = $comments[count($comments) - 1];
+			$text = $comment->getText();
+			if(strpos($text, '@since') === false && strpos($text, '@deprecated') === false) {
+				$this->errors[] = '@since or @deprecated tag is needed in PHPDoc for ' . $this->namespace . '\\' . $this->className . '::' . $node->name;
+				return;
+			}
+		}
+	}
+
+	public function getErrors() {
+		return $this->errors;
+	}
+}
+
+echo 'Parsing all files in lib/public for the presence of @since or @deprecated on each method...' . PHP_EOL . PHP_EOL;
+
+
+$parser = new PhpParser\Parser(new PhpParser\Lexer);
+
+/* iterate over all .php files in lib/public */
+$Directory = new RecursiveDirectoryIterator(dirname(__DIR__) . '/lib/public');
+$Iterator = new RecursiveIteratorIterator($Directory);
+$Regex = new RegexIterator($Iterator, '/^.+\.php$/i', RecursiveRegexIterator::GET_MATCH);
+
+$errors = [];
+
+foreach($Regex as $file) {
+	$stmts = $parser->parse(file_get_contents($file[0]));
+
+	$visitor = new SinceTagCheckVisitor($this->blackListedClassNames);
+	$traverser = new \PhpParser\NodeTraverser();
+	$traverser->addVisitor($visitor);
+	$traverser->traverse($stmts);
+
+	$errors = array_merge($errors, $visitor->getErrors());
+}
+
+if(count($errors)) {
+	echo join(PHP_EOL, $errors) . PHP_EOL . PHP_EOL;
+	exit(1);
+}