Add INIT event and bump plugin-api to 1.1.0, fixes #5232

doc/articles/scripts.md

@@ -54,6 +54,7 @@ Composer fires the following named events during its execution process:
 
 ### Plugin Events
 
+- **init**: occurs after a Composer instance is done being initialized.
 - **command**: occurs before any Composer Command is executed on the CLI. It
   provides you with access to the input and output objects of the program.
 - **pre-file-download**: occurs before files are downloaded and allows
@@ -162,6 +163,7 @@ objects:
 - Installer Events: [`Composer\Installer\InstallerEvent`](https://getcomposer.org/apidoc/master/Composer/Installer/InstallerEvent.html)
 - Package Events: [`Composer\Installer\PackageEvent`](https://getcomposer.org/apidoc/master/Composer/Installer/PackageEvent.html)
 - Plugin Events:
+  - init: [`Composer\EventDispatcher\Event`](https://getcomposer.org/apidoc/master/Composer/EventDispatcher/Event.html)
   - command: [`Composer\Plugin\CommandEvent`](https://getcomposer.org/apidoc/master/Composer/Plugin/CommandEvent.html)
   - pre-file-download: [`Composer\Plugin\PreFileDownloadEvent`](https://getcomposer.org/apidoc/master/Composer/Plugin/PreFileDownloadEvent.html)
 

src/Composer/Factory.php

@@ -25,6 +25,8 @@ use Composer\Util\Platform;
 use Composer\Util\ProcessExecutor;
 use Composer\Util\RemoteFilesystem;
 use Composer\Util\Silencer;
+use Composer\Plugin\PluginEvents;
+use Composer\EventDispatcher\Event;
 use Seld\JsonLint\DuplicateKeyException;
 use Symfony\Component\Console\Formatter\OutputFormatterStyle;
 use Composer\EventDispatcher\EventDispatcher;
@@ -353,12 +355,6 @@ class Factory
             $composer->setPluginManager($pm);
 
             $pm->loadInstalledPlugins();
-
-            // once we have plugins and custom installers we can
-            // purge packages from local repos if they have been deleted on the filesystem
-            if ($rm->getLocalRepository()) {
-                $this->purgePackages($rm->getLocalRepository(), $im);
-            }
         }
 
         // init locker if possible
@@ -371,6 +367,17 @@ class Factory
             $composer->setLocker($locker);
         }
 
+        if ($fullLoad) {
+            $initEvent = new Event(PluginEvents::INIT);
+            $composer->getEventDispatcher()->dispatch($initEvent->getName(), $initEvent);
+
+            // once everything is initialized we can
+            // purge packages from local repos if they have been deleted on the filesystem
+            if ($rm->getLocalRepository()) {
+                $this->purgePackages($rm->getLocalRepository(), $im);
+            }
+        }
+
         return $composer;
     }
 

src/Composer/Plugin/PluginEvents.php

@@ -19,6 +19,16 @@ namespace Composer\Plugin;
  */
 class PluginEvents
 {
+    /**
+     * The INIT event occurs after a Composer instance is done being initialized
+     *
+     * The event listener method receives a
+     * Composer\EventDispatcher\Event instance.
+     *
+     * @var string
+     */
+    const INIT = 'init';
+
     /**
      * The COMMAND event occurs as a command begins
      *

src/Composer/Plugin/PluginInterface.php

@@ -27,7 +27,7 @@ interface PluginInterface
      *
      * @var string
      */
-    const PLUGIN_API_VERSION = '1.0.0';
+    const PLUGIN_API_VERSION = '1.1.0';
 
     /**
      * Apply plugin modifications to Composer