Adds adapter for Google Cloud Client Library

composer.json

@@ -41,7 +41,8 @@
         "phpunit/phpunit": "3.7.*",
         "mikey179/vfsStream": "~1.2.0",
         "league/flysystem": "~1.0",
-        "mongodb/mongodb": "~1.1.4"
+        "mongodb/mongodb": "~1.1.4",
+        "google/cloud-storage": "dev-master"
     },
     "suggest": {
         "knplabs/knp-gaufrette-bundle": "to use with Symfony2",
@@ -61,7 +62,8 @@
         "ext-mbstring": "*",
         "ext-mongodb": "*",
         "ext-fileinfo": "This extension is used to automatically detect the content-type of a file in the AwsS3, OpenCloud, AzureBlogStorage and GoogleCloudStorage adapters",
-        "mongodb/mongodb": "*"
+        "mongodb/mongodb": "*",
+        "google/cloud-storage": "to use Google Cloud Client Library"
     },
     "autoload": {
         "psr-0": { "Gaufrette": "src/" }
@@ -71,4 +73,4 @@
             "dev-master": "0.4.x-dev"
         }
     }
-}
+}

doc/adapters/google-cloud-client-storage.md

@@ -0,0 +1,52 @@
+---
+currentMenu: google-cloud-client-storage
+---
+
+# Google Cloud Client Storage
+
+This adapter requires an instance of Google\Cloud\Storage\StorageClient that has proper access rights to the bucket you want to use.
+
+For more details see:
+http://googlecloudplatform.github.io/google-cloud-php/
+https://console.cloud.google.com/
+
+## Example
+
+```php
+<?php
+
+use Gaufrette\Filesystem;
+use Gaufrette\Adapter\GoogleCloudClientStorage;
+
+$storage = new StorageClient(array(
+    'projectId'     => 'your-project-id',
+    'keyFilePath'   => 'path/to/your/project/key.json'
+));
+
+# you can optionally set the directory in the bucket and the acl permissions for all uploaded files...
+# by default the uploaded files are read/write by the owner only
+# the example below gives read access to the uploaded files to anyone in the world
+
+$adapter = new GoogleCloudClientStorage($storage, 'bucket_name',
+    array(
+        'directory' => 'bucket_directory',
+        'acl'       => array(
+            'allUsers' => \Google\Cloud\Storage\Acl::ROLE_READER
+        )
+    )
+);
+
+$key = 'myAmazingFile.txt';
+
+# optional
+$adapter->setMetadata($key,
+    array(
+        'FileDescription' => 'This is my file. There are many like it, but this one is mine.'
+    )
+);
+
+$filesystem = new Filesystem($adapter);
+
+$filesystem->write($key, 'Uploaded at: '.date('Y-m-d @ H:i:s'), true);
+
+```

doc/adapters/google-cloud-storage.md

@@ -9,6 +9,8 @@ To use the GoogleCloudStorage adapter you will need to create a connection using
 (https://console.developers.google.com/). You can then create the `\Google_Service_Storage` which is required for the
 GoogleCloudStorage adapter.
 
+Install with: composer require google/cloud-storage
+
 ## Example
 
 ```php