Manually generate the default config yaml, remove most of the commandline arguments for synapse anticipating that people will use the yaml instead. Simpify implementing config options by not requiring the classes to hit the super class

synapse/config/registration.py

@@ -22,40 +22,21 @@ import distutils.util
 
 class RegistrationConfig(Config):
 
-    def __init__(self, args):
-        super(RegistrationConfig, self).__init__(args)
-
-        # `args.enable_registration` may either be a bool or a string depending
-        # on if the option was given a value (e.g. --enable-registration=true
-        # would set `args.enable_registration` to "true" not True.)
+    def read_config(self, config):
         self.disable_registration = not bool(
-            distutils.util.strtobool(str(args.enable_registration))
+            distutils.util.strtobool(str(config["enable_registration"]))
         )
-        self.registration_shared_secret = args.registration_shared_secret
+        self.registration_shared_secret = config.get("registration_shared_secret")
 
-    @classmethod
-    def add_arguments(cls, parser):
-        super(RegistrationConfig, cls).add_arguments(parser)
-        reg_group = parser.add_argument_group("registration")
+    def default_config(self, config_dir, server_name):
+        registration_shared_secret = random_string_with_symbols(50)
+        return """\
+        ## Registration ##
 
-        reg_group.add_argument(
-            "--enable-registration",
-            const=True,
-            default=False,
-            nargs='?',
-            help="Enable registration for new users.",
-        )
-        reg_group.add_argument(
-            "--registration-shared-secret", type=str,
-            help="If set, allows registration by anyone who also has the shared"
-                 " secret, even if registration is otherwise disabled.",
-        )
+        # Enable registration for new users.
+        enable_registration: True
 
-    @classmethod
-    def generate_config(cls, args, config_dir_path):
-        super(RegistrationConfig, cls).generate_config(args, config_dir_path)
-        if args.enable_registration is None:
-            args.enable_registration = False
-
-        if args.registration_shared_secret is None:
-            args.registration_shared_secret = random_string_with_symbols(50)
+        # If set, allows registration by anyone who also has the shared
+        # secret, even if registration is otherwise disabled.
+        registration_shared_secret: "%(registration_shared_secret)s"
+        """ % locals()