general logic for creating package.zip

composer.json

@@ -9,7 +9,8 @@
         }
     ],
     "require": {
-        "php": "^8.3"
+        "php": "^8.3",
+        "ext-zip": "*"
     },
     "require-dev": {
         "ergebnis/composer-normalize": "^2.42",

src/Action.php

@@ -23,6 +23,41 @@ public function __construct()
      */
     public function run()
     {
-        // $this->configuration->get('build.directory');
+        if (!extension_loaded('zip')) {
+            // throw
+        }
+
+        $directory = $this->configuration->get('build.directory');
+
+        if (is_dir($directory)) {
+            // throw
+        }
+
+        // rights
+
+        mkdir($directory, 0755, true);
+
+        $zip = new \ZipArchive();
+        if (!$zip->open($this->configuration->get('build.file'), \ZipArchive::CREATE)) {
+            // throw
+        }
+
+        $rootDirectory = $this->configuration->getRootDirectory();
+
+        $iterator = new \RecursiveIteratorIterator(
+            new \RecursiveDirectoryIterator($rootDirectory),
+            \RecursiveIteratorIterator::CHILD_FIRST
+        );
+
+        foreach ($iterator as $path) {
+
+            // exclude files described in .gitignore
+
+            if ($path->isFile()) {
+                $zip->addFile($path->getPathname(), str_replace($rootDirectory . DIRECTORY_SEPARATOR, '', $path->getPathname()));
+            }
+        }
+
+        $zip->close();
     }
 }

src/Configuration/Configuration.php

@@ -56,4 +56,9 @@ public function get (string $option): mixed
 
         return $target;
     }
+
+    public function getRootDirectory (): string
+    {
+        return realpath($this->get('build.directory') . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR);
+    }
 }