add GDrive provider support (#118)

* GDrive provider support
* More reliable basedir ownership
* Fix mimetype

vendor/cloud.google.com/go/iam/admin/apiv1/path_funcs.go

@@ -0,0 +1,45 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package admin
+
+// IamProjectPath returns the path for the project resource.
+func IamProjectPath(project string) string {
+	return "" +
+		"projects/" +
+		project +
+		""
+}
+
+// IamServiceAccountPath returns the path for the service account resource.
+func IamServiceAccountPath(project, serviceAccount string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/serviceAccounts/" +
+		serviceAccount +
+		""
+}
+
+// IamKeyPath returns the path for the key resource.
+func IamKeyPath(project, serviceAccount, key string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/serviceAccounts/" +
+		serviceAccount +
+		"/keys/" +
+		key +
+		""
+}