Adds ability to configure swift object store though environment (#1243)

Signed-off-by: Adam Jenkins <adamjenkins1701@gmail.com>

.config/swift.config.php

+<?php
+if (getenv('OBJECTSTORE_SWIFT_URL')) {
+    $autocreate = getenv('OBJECTSTORE_SWIFT_AUTOCREATE');
+  $CONFIG = array(
+    'objectstore' => [
+      'class' => 'OC\\Files\\ObjectStore\\Swift',
+      'arguments' => [
+        'autocreate' => $autocreate == true && strtolower($autocreate) !== 'false',
+        'user' => [
+          'name' => getenv('OBJECTSTORE_SWIFT_USER_NAME'),
+          'password' => getenv('OBJECTSTORE_SWIFT_USER_PASSWORD'),
+          'domain' => [
+            'name' => (getenv('OBJECTSTORE_SWIFT_USER_DOMAIN')) ?: 'Default',
+          ],
+        ],
+        'scope' => [
+          'project' => [
+            'name' => getenv('OBJECTSTORE_SWIFT_PROJECT_NAME'),
+            'domain' => [
+              'name' => (getenv('OBJECTSTORE_SWIFT_PROJECT_DOMAIN')) ?: 'Default',
+            ],
+          ],
+        ],
+        'serviceName' => (getenv('OBJECTSTORE_SWIFT_SERVICE_NAME')) ?: 'swift',
+        'region' => getenv('OBJECTSTORE_SWIFT_REGION'),
+        'url' => getenv('OBJECTSTORE_SWIFT_URL'),
+        'bucket' => getenv('OBJECTSTORE_SWIFT_CONTAINER_NAME'),
+      ]
+    ]
+  );
+}

README.md

@@ -170,6 +170,20 @@ To use an external S3 compatible object store as primary storage, set the follow
 
 Check the [Nextcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/configuration_files/primary_storage.html#simple-storage-service-s3) for more information.
 
+To use an external OpenStack Swift object store as primary storage, set the following variables:
+- `OBJECTSTORE_SWIFT_URL`: The Swift identity (Keystone) endpoint
+- `OBJECTSTORE_SWIFT_AUTOCREATE` (default: `false`): Whether or not Nextcloud should automatically create the Swift container
+- `OBJECTSTORE_SWIFT_USER_NAME`: Swift username
+- `OBJECTSTORE_SWIFT_USER_PASSWORD`: Swift user password
+- `OBJECTSTORE_SWIFT_USER_DOMAIN` (default: `Default`): Swift user domain 
+- `OBJECTSTORE_SWIFT_PROJECT_NAME`: OpenStack project name
+- `OBJECTSTORE_SWIFT_PROJECT_DOMAIN` (default: `Default`): OpenStack project domain
+- `OBJECTSTORE_SWIFT_SERVICE_NAME` (default: `swift`): Swift service name
+- `OBJECTSTORE_SWIFT_SERVICE_REGION`: Swift endpoint region
+- `OBJECTSTORE_SWIFT_CONTAINER_NAME`: Swift container (bucket) that Nextcloud should store the data in
+
+Check the [Nextcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/configuration_files/primary_storage.html#openstack-swift) for more information.
+
 
 ## Using the apache image behind a reverse proxy and auto configure server host and protocol