Add changelog

From https://github.com/element-hq/synapse/pull/18868

changelog.d/18933.misc

@@ -0,0 +1 @@
+Split loading config from homeserver `setup`.

synapse/app/admin_cmd.py

@@ -24,7 +24,7 @@ import logging
 import os
 import sys
 import tempfile
-from typing import List, Mapping, Optional, Sequence
+from typing import List, Mapping, Optional, Sequence, Tuple
 
 from twisted.internet import defer, task
 
@@ -256,7 +256,7 @@ class FileExfiltrationWriter(ExfiltrationWriter):
         return self.base_directory
 
 
-def start(config_options: List[str]) -> None:
+def load_config(argv_options: List[str]) -> Tuple[HomeServerConfig, argparse.Namespace]:
     parser = argparse.ArgumentParser(description="Synapse Admin Command")
     HomeServerConfig.add_arguments_to_parser(parser)
 
@@ -282,11 +282,15 @@ def start(config_options: List[str]) -> None:
     export_data_parser.set_defaults(func=export_data_command)
 
     try:
-        config, args = HomeServerConfig.load_config_with_parser(parser, config_options)
+        config, args = HomeServerConfig.load_config_with_parser(parser, argv_options)
     except ConfigError as e:
         sys.stderr.write("\n" + str(e) + "\n")
         sys.exit(1)
 
+    return config, args
+
+
+def start(config: HomeServerConfig, args: argparse.Namespace) -> None:
     if config.worker.worker_app is not None:
         assert config.worker.worker_app == "synapse.app.admin_cmd"
 
@@ -325,7 +329,7 @@ def start(config_options: List[str]) -> None:
     # command.
 
     async def run() -> None:
-        with LoggingContext("command"):
+        with LoggingContext(name="command"):
             await _base.start(ss)
             await args.func(ss, args)
 
@@ -337,5 +341,6 @@ def start(config_options: List[str]) -> None:
 
 
 if __name__ == "__main__":
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config, args = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config, args)

synapse/app/appservice.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/client_reader.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/event_creator.py

@@ -20,13 +20,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/federation_reader.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/federation_sender.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/frontend_proxy.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/generic_worker.py

@@ -310,13 +310,26 @@ class GenericWorkerServer(HomeServer):
         self.get_replication_command_handler().start_replication(self)
 
 
-def start(config_options: List[str]) -> None:
+def load_config(argv_options: List[str]) -> HomeServerConfig:
+    """
+    Parse the commandline and config files (does not generate config)
+
+    Args:
+        argv_options: The options passed to Synapse. Usually `sys.argv[1:]`.
+
+    Returns:
+        Config object.
+    """
     try:
-        config = HomeServerConfig.load_config("Synapse worker", config_options)
+        config = HomeServerConfig.load_config("Synapse worker", argv_options)
     except ConfigError as e:
         sys.stderr.write("\n" + str(e) + "\n")
         sys.exit(1)
 
+    return config
+
+
+def start(config: HomeServerConfig) -> None:
     # For backwards compatibility let any of the old app names.
     assert config.worker.worker_app in (
         "synapse.app.appservice",
@@ -355,12 +368,7 @@ def start(config_options: List[str]) -> None:
     except Exception as e:
         handle_startup_exception(e)
 
-    async def start() -> None:
-        # Re-establish log context now that we're back from the reactor
-        with LoggingContext("start"):
-            await _base.start(hs)
-
-    register_start(start)
+    register_start(_base.start, hs)
 
     # redirect stdio to the logs, if configured.
     if not hs.config.logging.no_redirect_stdio:
@@ -370,8 +378,9 @@ def start(config_options: List[str]) -> None:
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/homeserver.py

@@ -308,17 +308,21 @@ class SynapseHomeServer(HomeServer):
                 logger.warning("Unrecognized listener type: %s", listener.type)
 
 
-def setup(config_options: List[str]) -> SynapseHomeServer:
+def load_or_generate_config(argv_options: List[str]) -> HomeServerConfig:
     """
+    Parse the commandline and config files
+
+    Supports generation of config files, so is used for the main homeserver app.
+
     Args:
-        config_options_options: The options passed to Synapse. Usually `sys.argv[1:]`.
+        argv_options: The options passed to Synapse. Usually `sys.argv[1:]`.
 
     Returns:
         A homeserver instance.
     """
     try:
         config = HomeServerConfig.load_or_generate_config(
-            "Synapse Homeserver", config_options
+            "Synapse Homeserver", argv_options
         )
     except ConfigError as e:
         sys.stderr.write("\n")
@@ -332,6 +336,20 @@ def setup(config_options: List[str]) -> SynapseHomeServer:
         # generating config files and shouldn't try to continue.
         sys.exit(0)
 
+    return config
+
+
+def setup(config: HomeServerConfig) -> SynapseHomeServer:
+    """
+    Create and setup a Synapse homeserver instance given a configuration.
+
+    Args:
+        config: The configuration for the homeserver.
+
+    Returns:
+        A homeserver instance.
+    """
+
     if config.worker.worker_app:
         raise ConfigError(
             "You have specified `worker_app` in the config but are attempting to start a non-worker "
@@ -407,10 +425,12 @@ def run(hs: HomeServer) -> None:
 
 
 def main() -> None:
+    homeserver_config = load_or_generate_config(sys.argv[1:])
+
     with LoggingContext("main"):
         # check base requirements
         check_requirements()
-        hs = setup(sys.argv[1:])
+        hs = setup(homeserver_config)
 
         # redirect stdio to the logs, if configured.
         if not hs.config.logging.no_redirect_stdio:

synapse/app/media_repository.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/pusher.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/synchrotron.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/app/user_dir.py

@@ -21,13 +21,14 @@
 
 import sys
 
-from synapse.app.generic_worker import start
+from synapse.app.generic_worker import load_config, start
 from synapse.util.logcontext import LoggingContext
 
 
 def main() -> None:
-    with LoggingContext("main"):
-        start(sys.argv[1:])
+    homeserver_config = load_config(sys.argv[1:])
+    with LoggingContext(name="main"):
+        start(homeserver_config)
 
 
 if __name__ == "__main__":

synapse/config/_base.py

@@ -646,12 +646,16 @@ class RootConfig:
 
     @classmethod
     def load_or_generate_config(
-        cls: Type[TRootConfig], description: str, argv: List[str]
+        cls: Type[TRootConfig], description: str, argv_options: List[str]
     ) -> Optional[TRootConfig]:
         """Parse the commandline and config files
 
         Supports generation of config files, so is used for the main homeserver app.
 
+        Args:
+            description: TODO
+            argv_options: The options passed to Synapse. Usually `sys.argv[1:]`.
+
         Returns:
             Config object, or None if --generate-config or --generate-keys was set
         """
@@ -747,7 +751,7 @@ class RootConfig:
         )
 
         cls.invoke_all_static("add_arguments", parser)
-        config_args = parser.parse_args(argv)
+        config_args = parser.parse_args(argv_options)
 
         config_files = find_config_files(search_paths=config_args.config_path)
 

tests/app/test_homeserver_start.py

@@ -37,4 +37,7 @@ class HomeserverAppStartTestCase(ConfigFileTestCase):
         self.add_lines_to_config(["  main:", "    host: 127.0.0.1", "    port: 1234"])
         # Ensure that starting master process with worker config raises an exception
         with self.assertRaises(ConfigError):
-            synapse.app.homeserver.setup(["-c", self.config_file])
+            homeserver_config = synapse.app.homeserver.load_or_generate_config(
+                ["-c", self.config_file]
+            )
+            synapse.app.homeserver.setup(homeserver_config)

tests/config/test_registration_config.py

@@ -112,4 +112,7 @@ class RegistrationConfigTestCase(ConfigFileTestCase):
 
         # Test that allowing open registration without verification raises an error
         with self.assertRaises(ConfigError):
-            synapse.app.homeserver.setup(["-c", self.config_file])
+            homeserver_config = synapse.app.homeserver.load_or_generate_config(
+                ["-c", self.config_file]
+            )
+            synapse.app.homeserver.setup(homeserver_config)