Added missing cache util class + cache is now using loaded code to ge…

…nerate a more accurate hash (ref PHPCSStandards#530)

If the PHPS core code updates (as with an upgrade) or if the ruleset changes which sniffs are loaded, or if the PHP code inside a sniff file changes (as with a standard update) then a new hash will be generated.

autoload.php

@@ -137,6 +137,30 @@ public static function getLoadedFileName($class)
     }//end getLoadedFileName()
 
 
+    /**
+     * Gets the mapping of file names to class names.
+     *
+     * @return array<string, string>
+     */
+    public static function getLoadedClasses()
+    {
+        return self::$loadedClasses;
+
+    }//end getLoadedClasses()
+
+
+    /**
+     * Gets the mapping of class names to file names.
+     *
+     * @return array<string, string>
+     */
+    public static function getLoadedFiles()
+    {
+        return self::$loadedFiles;
+
+    }//end getLoadedFiles()
+
+
 }//end class
 
 

src/Files/FileList.php

@@ -44,10 +44,7 @@ class FileList implements \Iterator, \Countable
     protected $ignorePatterns = array();
 
 
-    public function __construct(
-        Config $config,
-        Ruleset $ruleset
-    ) {
+    public function __construct(Config $config, Ruleset $ruleset) {
 
         $paths      = $config->files;
         $local      = $config->local;

src/Runner.php

@@ -322,7 +322,7 @@ private function run()
             $numFiles = count($todo);
 
             if ($this->config->cache === true) {
-                Cache::load($this->config);
+                Cache::load($this->config, $ruleset);
             }
 
             if (PHP_CODESNIFFER_VERBOSITY > 0) {

src/Util/Cache.php

@@ -0,0 +1,111 @@
+<?php
+
+namespace PHP_CodeSniffer\Util;
+
+use PHP_CodeSniffer\Autoload;
+use PHP_CodeSniffer\Config;
+use PHP_CodeSniffer\Ruleset;
+
+/**
+ * A class to process command line phpcs scripts.
+ *
+ * PHP version 5
+ *
+ * @category  PHP
+ * @package   PHP_CodeSniffer
+ * @author    Greg Sherwood <gsherwood@squiz.net>
+ * @copyright 2006-2014 Squiz Pty Ltd (ABN 77 084 670 600)
+ * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ * @link      http://pear.php.net/package/PHP_CodeSniffer
+ */
+
+/**
+ * A class to process command line phpcs scripts.
+ *
+ * @category  PHP
+ * @package   PHP_CodeSniffer
+ * @author    Greg Sherwood <gsherwood@squiz.net>
+ * @copyright 2006-2014 Squiz Pty Ltd (ABN 77 084 670 600)
+ * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
+ * @version   Release: @package_version@
+ * @link      http://pear.php.net/package/PHP_CodeSniffer
+ */
+class Cache
+{
+
+    private static $path  = '';
+    private static $cache = array();
+
+
+    public static function load(Config $config, Ruleset $ruleset)
+    {
+        // Look at every loaded class so far and use their file contents
+        // to generate a hash for the code used during the run.
+        // At this point, the loaded class list contains the core PHPCS code
+        // and all sniffs that have been loaded as part of the run.
+        $codeHash = '';
+        $classes  = array_keys(Autoload::getLoadedClasses());
+        sort($classes);
+        foreach ($classes as $file) {
+            $codeHash .= md5_file($file);
+        }
+
+        $codeHash = md5($codeHash);
+
+        // Along with the code hash, use various settings that can affect
+        // the results of a run to create a new hash. This hash will be used
+        // in the cache file name.
+        $configData = array(
+                       'tabWidth'        => $config->tabWidth,
+                       'encoding'        => $config->encoding,
+                       'errorSeverity'   => $config->errorSeverity,
+                       'warningSeverity' => $config->warningSeverity,
+                       'sniffs'          => $config->sniffs,
+                       'standards'       => $ruleset->paths,
+                       'codeHash'        => $codeHash,
+                      );
+
+        sort($configData['sniffs']);
+        sort($configData['standards']);
+        $configData['sniffs']    = implode(',', $configData['sniffs']);
+        $configData['standards'] = implode(',', $configData['standards']);
+
+        $configString = implode(',', $configData);
+        $hash         = substr(sha1($configString), 0, 12);
+
+        self::$path = getcwd().DIRECTORY_SEPARATOR.".phpcs.$hash.cache";
+        if (file_exists(self::$path) === true) {
+            self::$cache = json_decode(file_get_contents(self::$path), true);
+        }
+
+        self::$cache['config'] = $configData;
+
+    }//end load()
+
+
+    public static function save()
+    {
+        file_put_contents(self::$path, json_encode(self::$cache));
+
+    }//end save()
+
+
+    public static function get($key)
+    {
+        if (isset(self::$cache[$key]) === true) {
+            return self::$cache[$key];
+        }
+
+        return false;
+
+    }//end get()
+
+
+    public static function set($key, $value)
+    {
+        self::$cache[$key] = $value;
+
+    }//end set()
+
+
+}//end class