Register callbacks with highest priority

Attempt to take action before other Composer plugins that may be in use by registering our callbacks using a very high priority (50,000) rather than the default priority of 0. Closes #99

Author: bd808

src/MergePlugin.php

@@ -92,6 +92,11 @@ class MergePlugin implements PluginInterface, EventSubscriberInterface
  */
  const COMPAT_PLUGINEVENTS_INIT = 'init';
 
+ /**
+ * Priority that plugin uses to register callbacks.
+ */
+ const CALLBACK_PRIORITY = 50000;
+
  /**
  * @var Composer $composer
  */
@@ -140,14 +145,22 @@ public static function getSubscribedEvents()
  // Use our own constant to make this event optional. Once
  // composer-1.1 is required, this can use PluginEvents::INIT
  // instead.
- self::COMPAT_PLUGINEVENTS_INIT => 'onInit',
- InstallerEvents::PRE_DEPENDENCIES_SOLVING => 'onDependencySolve',
- PackageEvents::POST_PACKAGE_INSTALL => 'onPostPackageInstall',
- ScriptEvents::POST_INSTALL_CMD => 'onPostInstallOrUpdate',
- ScriptEvents::POST_UPDATE_CMD => 'onPostInstallOrUpdate',
- ScriptEvents::PRE_AUTOLOAD_DUMP => 'onInstallUpdateOrDump',
- ScriptEvents::PRE_INSTALL_CMD => 'onInstallUpdateOrDump',
- ScriptEvents::PRE_UPDATE_CMD => 'onInstallUpdateOrDump',
+ self::COMPAT_PLUGINEVENTS_INIT =>
+ array('onInit', self::CALLBACK_PRIORITY),
+ InstallerEvents::PRE_DEPENDENCIES_SOLVING =>
+ array('onDependencySolve', self::CALLBACK_PRIORITY),
+ PackageEvents::POST_PACKAGE_INSTALL =>
+ array('onPostPackageInstall', self::CALLBACK_PRIORITY),
+ ScriptEvents::POST_INSTALL_CMD =>
+ array('onPostInstallOrUpdate', self::CALLBACK_PRIORITY),
+ ScriptEvents::POST_UPDATE_CMD =>
+ array('onPostInstallOrUpdate', self::CALLBACK_PRIORITY),
+ ScriptEvents::PRE_AUTOLOAD_DUMP =>
+ array('onInstallUpdateOrDump', self::CALLBACK_PRIORITY),
+ ScriptEvents::PRE_INSTALL_CMD =>
+ array('onInstallUpdateOrDump', self::CALLBACK_PRIORITY),
+ ScriptEvents::PRE_UPDATE_CMD =>
+ array('onInstallUpdateOrDump', self::CALLBACK_PRIORITY),
  );
  }