lib/drive_env.rb in drive_env-0.3.1 vs lib/drive_env.rb in drive_env-0.4.0

@@ -7,16 +7,24 @@
   autoload :Config,  'drive_env/config'
 
   class << self
     def authorizer(client_id, client_secret, token_store_file)
       unless @authorizer
-        client_id = Google::Auth::ClientId.new(client_id, client_secret)
+        cred = ENV['GOOGLE_APPLICATION_CREDENTIALS']
         scope = %w[
           https://www.googleapis.com/auth/drive
           https://spreadsheets.google.com/feeds/
         ]
-        token_store = Google::Auth::Stores::FileTokenStore.new(file: token_store_file)
-        @authorizer = Google::Auth::UserAuthorizer.new(client_id, scope, token_store)
+        if cred.nil?
+          client_id = Google::Auth::ClientId.new(client_id, client_secret)
+          token_store = Google::Auth::Stores::FileTokenStore.new(file: token_store_file)
+          @authorizer = Google::Auth::UserAuthorizer.new(client_id, scope, token_store)
+        else
+          @authorizer = Google::Auth::ServiceAccountCredentials.make_creds(
+            json_key_io: File.open(cred),
+            scope: scope
+          )
+        end
       end
       @authorizer
     end
   end
 end