add GDrive provider support (#118)

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

vendor/cloud.google.com/go/firestore/apiv1beta1/path_funcs.go

@@ -0,0 +1,78 @@
+// 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
+//
+//     https://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 firestore
+
+// DatabaseRootPath returns the path for the database root resource.
+//
+// Deprecated: Use
+//   fmt.Sprintf("projects/%s/databases/%s", project, database)
+// instead.
+func DatabaseRootPath(project, database string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/databases/" +
+		database +
+		""
+}
+
+// DocumentRootPath returns the path for the document root resource.
+//
+// Deprecated: Use
+//   fmt.Sprintf("projects/%s/databases/%s/documents", project, database)
+// instead.
+func DocumentRootPath(project, database string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/databases/" +
+		database +
+		"/documents" +
+		""
+}
+
+// DocumentPathPath returns the path for the document path resource.
+//
+// Deprecated: Use
+//   fmt.Sprintf("projects/%s/databases/%s/documents/%s", project, database, documentPath)
+// instead.
+func DocumentPathPath(project, database, documentPath string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/databases/" +
+		database +
+		"/documents/" +
+		documentPath +
+		""
+}
+
+// AnyPathPath returns the path for the any path resource.
+//
+// Deprecated: Use
+//   fmt.Sprintf("projects/%s/databases/%s/documents/%s/%s", project, database, document, anyPath)
+// instead.
+func AnyPathPath(project, database, document, anyPath string) string {
+	return "" +
+		"projects/" +
+		project +
+		"/databases/" +
+		database +
+		"/documents/" +
+		document +
+		"/" +
+		anyPath +
+		""
+}