adds old FileStorage again to be backward compatible

lib/google/api_client/auth/file_store.rb

@@ -0,0 +1,58 @@
+# Copyright 2013 Google Inc.
+#
+# 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.
+
+require 'signet/oauth_2/client'
+require_relative 'storage'
+require_relative 'storages/file_store'
+
+module Google
+  class APIClient
+
+    ##
+    # DEPRECATED WARNING
+    # This class is deprecated use Storage and FileStore as
+    # mentioned in the samples
+    #
+    # Represents cached OAuth 2 tokens stored on local disk in a
+    # JSON serialized file. Meant to resemble the serialized format
+    # http://google-api-python-client.googlecode.com/hg/docs/epy/oauth2client.file.Storage-class.html
+    #
+    class FileStorage
+
+      attr_accessor :storage,
+                    :path
+
+      def initialize(path)
+        @path = path
+        store = Google::APIClient::FileStore.new(@path)
+        @storage = Google::APIClient::Storage.new(store)
+      end
+
+      def authorization
+        storage.authorization
+      end
+
+      ##
+      # Write the credentials to the specified file.
+      #
+      # @param [Signet::OAuth2::Client] authorization
+      #    Optional authorization instance. If not provided, the authorization
+      #    already associated with this instance will be written.
+      def write_credentials(auth=nil)
+        self.authorization = auth unless auth.nil?
+        storage.write_credentials(self.authorization)
+      end
+    end
+  end
+end