feat: assets clear cache at install/update

src/AssetsClearCache.php

+<?php
+
+namespace Spip\Composer;
+
+use Composer\Script\Event;
+use Symfony\Component\Filesystem\Filesystem;
+
+/**
+ * Script for post-install-cmd and post-update-cmd.
+ */
+class AssetsClearCache
+{
+    /** @var string[] */
+    private static array $dirs = [
+        'cache-css',
+        'cache-js',
+    ];
+
+    /**
+     * To delete the cache files dedicated for public compiled assets
+     *
+     * @param $event
+     *
+     * @return void
+     */
+    public static function assetsClearCache(Event $event)
+    {
+        $event->getIO()->write('Clearing the assets cache ...');
+        $vendorDir = $event->getComposer()->getConfig()->get('vendor-dir') . '/';
+
+        $f = new Filesystem;
+        foreach (self::$dirs as $dir) {
+            $toDelete = $vendorDir . '../' . SpipPaths::VAR . '/' . $dir;
+            if ($f->exists($toDelete)) {
+                $f->remove($toDelete);
+            }
+        }
+
+        $event->getIO()->write('Done.');
+    }
+}

src/SpipInstallerPlugin.php

@@ -28,8 +28,8 @@ class SpipInstallerPlugin implements PluginInterface, EventSubscriberInterface,
     public static function getSubscribedEvents()
     {
         return [
-            'post-install-cmd' => [['updateSafetyScreen'], ['pluginsClearCache']],
-            'post-update-cmd' => [['updateSafetyScreen'], ['pluginsClearCache']],
+            'post-install-cmd' => [['updateSafetyScreen'], ['clearCache']],
+            'post-update-cmd' => [['updateSafetyScreen'], ['clearCache']],
         ];
     }
 
@@ -38,9 +38,10 @@ class SpipInstallerPlugin implements PluginInterface, EventSubscriberInterface,
         Security::copySafetyScreen($event);
     }
 
-    public function pluginsClearCache(Event $event): void
+    public function clearCache(Event $event): void
     {
         PluginsClearCache::pluginClearCache($event);
+        AssetsClearCache::assetsClearCache($event);
     }
 
     public function getCapabilities()