Added Options service

Author: WalterWoshid

src/CodeTransformerKernel.php

@@ -3,6 +3,7 @@
 namespace Okapi\CodeTransformer;
 
 use Okapi\CodeTransformer\Exception\Kernel\DirectKernelInitializationException;
+use Okapi\CodeTransformer\Service\Options;
 use Okapi\Singleton\Singleton;
 
 /**
@@ -49,12 +50,29 @@ public static function init(
         $instance->ensureNotAlreadyInitialized();
 
         if ($instance->transformers) {
-            // TODO: Register services
+            Options::setOptions(
+                cacheDir:      $cacheDir,
+                cacheFileMode: $cacheFileMode,
+                debug:         $debug,
+            );
+
+            $instance->registerServices();
         }
 
         $instance->setInitialized();
     }
 
+    /**
+     * Register the services.
+     *
+     * @return void
+     */
+    protected function registerServices(): void
+    {
+        // Options provider
+        Options::register();
+    }
+
     /**
      * Make sure that the kernel is not called from this class.
      *

src/Service/Options.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace Okapi\CodeTransformer\Service;
+
+use Okapi\Path\Path;
+use Okapi\Singleton\Singleton;
+
+/**
+ * # Options
+ *
+ * The `Options` class provides access to the options passed to the `CodeTransformerKernel`.
+ */
+class Options implements ServiceInterface
+{
+    use Singleton;
+
+    /**
+     * The application directory.
+     *
+     * @var string
+     */
+    public static string $appDir;
+
+    /**
+     * The cache directory.
+     *
+     * @var string
+     */
+    public static string $cacheDir;
+
+    /**
+     * The cache file mode.
+     *
+     * @var int
+     */
+    public static int $cacheFileMode;
+
+    /**
+     * Enable debug mode. This will disable the cache.
+     *
+     * @var bool
+     */
+    public static bool $debug;
+
+    /**
+     * Options constructor.
+     *
+     * @param string|null $cacheDir
+     * @param int|null    $cacheFileMode
+     * @param bool|null   $debug
+     */
+    public static function setOptions(
+        ?string $cacheDir,
+        ?int    $cacheFileMode,
+        ?bool   $debug,
+    ): void {
+        $rootDir = getcwd();
+
+        if ($rootDir === false) {
+            $rootDir = Path::resolve(Path::join(__DIR__, '../../../../..'));
+        }
+
+        self::$appDir        = $rootDir;
+        self::$cacheDir      = $cacheDir ?? Path::join($rootDir, 'cache/code-transformer');
+        self::$cacheFileMode = $cacheFileMode ?? (0777 & ~umask());
+        self::$debug         = $debug ?? false;
+    }
+
+    /**
+     * Register the options.
+     *
+     * @return void
+     */
+    public static function register(): void
+    {
+        $instance = self::getInstance();
+        $instance->ensureNotAlreadyInitialized();
+
+        $instance->setInitialized();
+    }
+}

src/Service/ServiceInterface.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Okapi\CodeTransformer\Service;
+
+/**
+ * # Service Interface
+ *
+ * This interface is used to define a service.
+ */
+interface ServiceInterface
+{
+    /**
+     * Register a service.
+     *
+     * @return void
+     */
+    public static function register(): void;
+}