add clear build command

app/Console/Commands/ClearBuild.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Console\Commands;
+
+use Exception;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\File;
+
+class ClearBuild extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'clear-build';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Clean unused files in build/assets';
+
+    /**
+     * Execute the console command.
+     */
+    public function handle(): void
+    {
+        try {
+            // list all current build files used
+            $filesUsed = [];
+            $manifest = File::get(public_path('build/manifest.json'));
+            foreach (json_decode($manifest) as $line) {
+                $filesUsed[] = str_replace('assets/', '', $line->file);
+            }
+
+            $count = 0;
+            foreach (File::files(public_path('build/assets')) as $file) {
+                if (! in_array($file->getFilename(), $filesUsed)) {
+                    unlink($file->getPathname());
+                    $count++;
+                }
+            }
+
+            $this->info($count.' files deleted.');
+        } catch (Exception $e) {
+            $this->error($e->getMessage());
+        }
+    }
+}