Fix the --generate-keys option. Make it do the same thing as --generate-config does when the config file exists, but without printing a warning

synapse/config/_base.py

@@ -149,6 +149,8 @@ class Config(object):
         )
         config_args, remaining_args = config_parser.parse_known_args(argv)
 
+        generate_keys = config_args.generate_keys
+
         if config_args.generate_config:
             if not config_args.config_path:
                 config_parser.error(
@@ -156,34 +158,17 @@ class Config(object):
                     " generated using \"--generate-config -H SERVER_NAME"
                     " -c CONFIG-FILE\""
                 )
-
+            (config_path,) = config_args.config_path
-            config_dir_path = os.path.dirname(config_args.config_path[0])
+            if not os.path.exists(config_path):
+                config_dir_path = os.path.dirname(config_path)
                 config_dir_path = os.path.abspath(config_dir_path)
 
                 server_name = config_args.server_name
                 if not server_name:
                     print "Must specify a server_name to a generate config for."
                     sys.exit(1)
-            (config_path,) = config_args.config_path
                 if not os.path.exists(config_dir_path):
                     os.makedirs(config_dir_path)
-            if os.path.exists(config_path):
-                print "Config file %r already exists" % (config_path,)
-                yaml_config = cls.read_config_file(config_path)
-                yaml_name = yaml_config["server_name"]
-                if server_name != yaml_name:
-                    print (
-                        "Config file %r has a different server_name: "
-                        " %r != %r" % (config_path, server_name, yaml_name)
-                    )
-                    sys.exit(1)
-                config_bytes, config = obj.generate_config(
-                    config_dir_path, server_name
-                )
-                config.update(yaml_config)
-                print "Generating any missing keys for %r" % (server_name,)
-                obj.invoke_all("generate_files", config)
-                sys.exit(0)
                 with open(config_path, "wb") as config_file:
                     config_bytes, config = obj.generate_config(
                         config_dir_path, server_name
@@ -191,16 +176,22 @@ class Config(object):
                     obj.invoke_all("generate_files", config)
                     config_file.write(config_bytes)
                 print (
-                    "A config file has been generated in %s for server name"
+                    "A config file has been generated in %r for server name"
-                    " '%s' with corresponding SSL keys and self-signed"
+                    " %r with corresponding SSL keys and self-signed"
-                    " certificates. Please review this file and customise it to"
+                    " certificates. Please review this file and customise it"
-                    " your needs."
+                    " to your needs."
                 ) % (config_path, server_name)
                 print (
-                "If this server name is incorrect, you will need to regenerate"
+                    "If this server name is incorrect, you will need to"
-                " the SSL certificates"
+                    " regenerate the SSL certificates"
                 )
                 sys.exit(0)
+            else:
+                print (
+                    "Config file %r already exists. Generating any missing key"
+                    " files."
+                ) % (config_path,)
+                generate_keys = True
 
         parser = argparse.ArgumentParser(
             parents=[config_parser],
@@ -218,7 +209,7 @@ class Config(object):
                 " -c CONFIG-FILE\""
             )
 
-        config_dir_path = os.path.dirname(config_args.config_path[0])
+        config_dir_path = os.path.dirname(config_args.config_path[-1])
         config_dir_path = os.path.abspath(config_dir_path)
 
         specified_config = {}
@@ -231,12 +222,12 @@ class Config(object):
         config.pop("log_config")
         config.update(specified_config)
 
+        if generate_keys:
+            obj.invoke_all("generate_files", config)
+            sys.exit(0)
+
         obj.invoke_all("read_config", config)
 
         obj.invoke_all("read_arguments", args)
 
-        if config_args.generate_keys:
-            obj.invoke_all("generate_files", config)
-            sys.exit(0)
-
         return obj