Merge "registration: Allow extensions to specify which MW core versions they require"

[lhc/web/wiklou.git] / includes / registration / ExtensionRegistry.php

diff --git a/includes/registration/ExtensionRegistry.php b/includes/registration/ExtensionRegistry.php
index 787a4b0..23e29d8 100644 (file)
--- a/includes/registration/ExtensionRegistry.php
+++ b/includes/registration/ExtensionRegistry.php
@@ -11,6 +11,11 @@
  */
 class ExtensionRegistry {
 
+       /**
+        * "requires" key that applies to MediaWiki core/$wgVersion
+        */
+       const MEDIAWIKI_CORE = 'MediaWiki';
+
        /**
         * Version of the highest supported manifest version
         */
@@ -156,8 +161,11 @@ class ExtensionRegistry {
         * @throws Exception
         */
        public function readFromQueue( array $queue ) {
+               global $wgVersion;
                $autoloadClasses = array();
                $processor = new ExtensionProcessor();
+               $incompatible = array();
+               $coreVersionParser = new CoreVersionChecker( $wgVersion );
                foreach ( $queue as $path => $mtime ) {
                        $json = file_get_contents( $path );
                        if ( $json === false ) {
@@ -179,8 +187,27 @@ class ExtensionRegistry {
                        // Set up the autoloader now so custom processors will work
                        $GLOBALS['wgAutoloadClasses'] += $autoload;
                        $autoloadClasses += $autoload;
+                       // Check any constraints against MediaWiki core
+                       $requires = $processor->getRequirements( $info );
+                       if ( isset( $requires[self::MEDIAWIKI_CORE] )
+                               && !$coreVersionParser->check( $requires[self::MEDIAWIKI_CORE] )
+                       ) {
+                               // Doesn't match, mark it as incompatible.
+                               $incompatible[] = "{$info['name']} is not compatible with the current "
+                                       . "MediaWiki core (version {$wgVersion}), it requires: ". $requires[self::MEDIAWIKI_CORE]
+                                       . '.';
+                               continue;
+                       }
+                       // Compatible, read and extract info
                        $processor->extractInfo( $path, $info, $version );
                }
+               if ( $incompatible ) {
+                       if ( count( $incompatible ) === 1 ) {
+                               throw new Exception( $incompatible[0] );
+                       } else {
+                               throw new Exception( implode( "\n", $incompatible ) );
+                       }
+               }
                $data = $processor->getExtractedInfo();
                // Need to set this so we can += to it later
                $data['globals']['wgAutoloadClasses'] = array();