Implement new step-by-step setup

util/config/provider.py

@@ -61,6 +61,12 @@ class BaseProvider(object):
     """
     raise NotImplementedError
 
+  def requires_restart(self, app_config):
+    """ If true, the configuration loaded into memory for the app does not match that on disk,
+        indicating that this container requires a restart.
+    """
+    raise NotImplementedError
+
 
 class FileConfigProvider(BaseProvider):
   """ Implementation of the config provider that reads the data from the file system. """
@@ -104,6 +110,16 @@ class FileConfigProvider(BaseProvider):
   def save_volume_file(self, filename, flask_file):
     flask_file.save(os.path.join(self.config_volume, filename))
 
+  def requires_restart(self, app_config):
+    file_config = self.get_yaml()
+    if not file_config:
+      return False
+
+    for key in file_config:
+      if app_config.get(key) != file_config[key]:
+        return True
+
+    return False
 
 class TestConfigProvider(BaseProvider):
   """ Implementation of the config provider for testing. Everything is kept in-memory instead on
@@ -136,6 +152,9 @@ class TestConfigProvider(BaseProvider):
   def save_volume_file(self, filename, flask_file):
     self.files[filename] = ''
 
+  def requires_restart(self, app_config):
+    return False
+
   def reset_for_test(self):
     self._config['SUPER_USERS'] = ['devtable']
     self.files = {}