CRM-16243 - CRM_Extension_Manager::install() - Refresh class-loader i…

…ncrementally

This allows an extension's installation logic to use a class defined by one
of the (upstream) requirements.

CRM/Extension/Manager.php

@@ -222,13 +222,23 @@ public function install($keys) {
           $typeManager->onPreEnable($info);
           $this->_setExtensionActive($info, 1);
           $typeManager->onPostEnable($info);
+
+          // A full refresh would be preferrable but very slow. This at least allows
+          // later extensions to access classes from earlier extensions.
+          $this->statuses = NULL;
+          $this->mapper->refresh();
           break;
 
         case self::STATUS_UNINSTALLED:
           // install anew
           $typeManager->onPreInstall($info);
           $this->_createExtensionEntry($info);
           $typeManager->onPostInstall($info);
+
+          // A full refresh would be preferrable but very slow. This at least allows
+          // later extensions to access classes from earlier extensions.
+          $this->statuses = NULL;
+          $this->mapper->refresh();
           break;
 
         case self::STATUS_UNKNOWN: