Allow passing custom cloud tasks client options

README.md

@@ -145,6 +145,27 @@ CloudTasksQueue::configureWorkerOptionsUsing(function (IncomingTask $task) {
 });
 ```
 
+#### Use a custom credentials file
+
+Modify (or add) the `client_options` key in the `config/cloud-tasks.php` file:
+
+```php
+'client_options' => [
+    'credentials' => '/path/to/credentials.json',
+]
+```
+
+
+#### Modify CloudTasksClient options
+
+Modify (or add) the `client_options` key in the `config/cloud-tasks.php` file:
+
+```php
+'client_options' => [
+    // custom options here
+]
+```
+
 ### How it works and differences
 
 Using Cloud Tasks as a Laravel queue driver is fundamentally different than other Laravel queue drivers, like Redis.

config/cloud-tasks.php

@@ -8,4 +8,9 @@
 
     // If the application only dispatches jobs
     'disable_task_handler' => env('CLOUD_TASKS_DISABLE_TASK_HANDLER', false),
+
+    // Optionally, pass custom options to the Cloud Tasks API client
+    'client_options' => [
+        // 'credentials' => '/path/to/custom/credentials.json',
+    ],
 ];

src/CloudTasksServiceProvider.php

@@ -26,7 +26,7 @@ public function boot(): void
     private function registerClient(): void
     {
         $this->app->singleton(CloudTasksClient::class, function () {
-            return new CloudTasksClient();
+            return new CloudTasksClient(config('cloud-tasks.client_options', []));
         });
 
         $this->app->singleton('cloud-tasks.worker', function (Application $app) {

tests/CloudTasksApiTest.php

@@ -42,6 +42,24 @@ protected function setUp(): void
 
     }
 
+    #[Test]
+    public function custom_client_options_can_be_added()
+    {
+        // Arrange
+        config()->set('cloud-tasks.client_options', [
+            'credentials' => __DIR__.'/Support/gcloud-key-dummy.json',
+        ]);
+
+        // Act
+        $export = var_export(app(CloudTasksClient::class), true);
+
+        // Assert
+
+        // CloudTasksClient makes it a bit difficult to read its properties, so this will have to do...
+        $this->assertStringContainsString('[email protected]', $export);
+        $this->assertStringContainsString('PRIVATE KEY', $export);
+    }
+
     #[Test]
     public function test_create_task()
     {

tests/Support/gcloud-key-dummy.json

@@ -0,0 +1,5 @@
+{
+    "type": "service_account",
+    "client_email": "[email protected]",
+    "private_key": "PRIVATE KEY"
+}