apps: init only required sections

kvmd/apps/__init__.py

@@ -74,6 +74,7 @@ def init(
     prog: Optional[str]=None,
     description: Optional[str]=None,
     add_help: bool=True,
+    sections: Optional[List[str]]=None,
     argv: Optional[List[str]]=None,
 ) -> Tuple[argparse.ArgumentParser, List[str], Section]:
 
@@ -89,7 +90,7 @@ def init(
                              help="View current configuration (include all overrides)")
     (options, remaining) = args_parser.parse_known_args(argv)
 
-    config = _init_config(options.config_path, options.set_options)
+    config = _init_config(options.config_path, (sections or []), options.set_options)
     if options.dump_config:
         _dump_config(config)
         raise SystemExit()
@@ -100,13 +101,13 @@ def init(
 
 
 # =====
-def _init_config(config_path: str, options: List[str]) -> Section:
+def _init_config(config_path: str, sections: List[str], override_options: List[str]) -> Section:
     config_path = os.path.expanduser(config_path)
     raw_config: Dict = load_yaml_file(config_path)
 
-    scheme = _get_config_scheme()
+    scheme = _get_config_scheme(sections)
     try:
-        _merge_dicts(raw_config, build_raw_from_options(options))
+        _merge_dicts(raw_config, build_raw_from_options(override_options))
         config = make_config(raw_config, scheme)
 
         scheme["kvmd"]["auth"]["internal"] = get_auth_service_class(config.kvmd.auth.internal_type).get_options()
@@ -138,8 +139,10 @@ def _merge_dicts(dest: Dict, src: Dict) -> None:
         dest[key] = src[key]
 
 
-def _get_config_scheme() -> Dict:
-    return {
+def _get_config_scheme(sections: List[str]) -> Dict:
+    scheme = {
+        "logging": Option({}),
+
         "kvmd": {
             "server": {
                 "host":              Option("localhost", type=valid_ip_or_host),
@@ -230,6 +233,13 @@ def _get_config_scheme() -> Dict:
                 "cmd": Option(["/bin/true"], type=valid_command),
             },
         },
-
-        "logging": Option({}),
     }
+
+    if sections:
+        return {
+            section: sub
+            for (section, sub) in scheme.items()
+            if section in sections
+        }
+    else:
+        return scheme

kvmd/apps/cleanup/__init__.py

@@ -36,7 +36,13 @@ from .. import init
 
 # =====
 def main(argv: Optional[List[str]]=None) -> None:
-    config = init("kvmd-cleanup", description="Kill KVMD and clear resources", argv=argv)[2].kvmd
+    config = init(
+        prog="kvmd-cleanup",
+        description="Kill KVMD and clear resources",
+        sections=["logging", "kvmd"],
+        argv=argv,
+    )[2].kvmd
+
     logger = get_logger(0)
 
     logger.info("Cleaning up ...")

kvmd/apps/htpasswd/__init__.py

@@ -98,7 +98,11 @@ def _cmd_delete(config: Section, options: argparse.Namespace) -> None:
 
 # =====
 def main(argv: Optional[List[str]]=None) -> None:
-    (parent_parser, argv, config) = init(add_help=False, argv=argv)
+    (parent_parser, argv, config) = init(
+        add_help=False,
+        sections=["logging", "kvmd"],
+        argv=argv,
+    )
     parser = argparse.ArgumentParser(
         prog="kvmd-htpasswd",
         description="Manage KVMD users (htpasswd auth only)",

kvmd/apps/kvmd/__init__.py

@@ -41,7 +41,13 @@ from .server import Server
 
 # =====
 def main(argv: Optional[List[str]]=None) -> None:
-    config = init("kvmd", description="The main Pi-KVM daemon", argv=argv)[2].kvmd
+    config = init(
+        prog="kvmd",
+        description="The main Pi-KVM daemon",
+        sections=["logging", "kvmd"],
+        argv=argv,
+    )[2].kvmd
+
     with gpio.bcm():
         # pylint: disable=protected-access
         Server(
@@ -60,4 +66,5 @@ def main(argv: Optional[List[str]]=None) -> None:
             msd=MassStorageDevice(**config.msd._unpack()),
             streamer=Streamer(**config.streamer._unpack()),
         ).run(**config.server._unpack())
+
     get_logger().info("Bye-bye")