Create better launch script

cheuph/euphoria/__init__.py

@@ -3,6 +3,7 @@ from typing import List
 from .edit_widgets import *
 from .euph_config import *
 from .euph_renderer import *
+from .launch_application import *
 from .room_widget import *
 from .single_room_application import *
 from .user_list_widget import *
@@ -12,6 +13,7 @@ __all__: List[str] = []
 __all__ += edit_widgets.__all__
 __all__ += euph_config.__all__
 __all__ += euph_renderer.__all__
+__all__ += launch_application.__all__
 __all__ += room_widget.__all__
 __all__ += single_room_application.__all__
 __all__ += user_list_widget.__all__

cheuph/euphoria/launch_application.py

@@ -0,0 +1,96 @@
+import argparse
+import asyncio
+import logging
+import pathlib
+from typing import Any, Callable, Optional
+
+import urwid
+import yaml
+
+from .euph_config import EuphConfig, EuphLoader
+
+__all__ = ["DEFAULT_CONFIG_PATHS", "launch"]
+
+DEFAULT_CONFIG_PATHS = [
+        "~/.config/cheuph/cheuph.yaml",
+        "~/.cheuph/cheuph.yaml",
+        "~/.cheuph.yaml",
+]
+
+GITHUB_URL = "https://github.com/Garmelon/cheuph"
+
+def parse_arguments() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+            description="A terminal-based client for euphoria.io",
+            epilog=f"For more information, see {GITHUB_URL}",
+            )
+    parser.add_argument("-e", "--export-defaults", type=str)
+    parser.add_argument("-c", "--config-file", type=str)
+    return parser.parse_args()
+
+def load_config_yaml(args: argparse.Namespace) -> Optional[str]:
+    path = None # TODO get from args
+    if path is None:
+        paths = DEFAULT_CONFIG_PATHS
+    else:
+        paths = [path]
+
+    for raw_path in paths:
+        path = pathlib.Path(raw_path).expanduser()
+        try:
+            with open(path) as f:
+                return yaml.load(f.read(), Loader=yaml.SafeLoader)
+        except FileNotFoundError:
+            print(f"Could not load config from {path}")
+
+    print("Could not find a config file. Using default settings.")
+    input("Press enter to continue") # TODO use better prompt?
+    return None
+
+def load_config(args: Any) -> EuphConfig:
+    loader = EuphLoader()
+    defaults = loader.defaults()
+    config = EuphConfig(defaults)
+
+    config_yaml = load_config_yaml(args) or {}
+    loader.load_to(config, config_yaml)
+
+    return config
+
+def export_defaults(path: str) -> None:
+    path = pathlib.Path(path).expanduser()
+    print(f"Exporting default config to {path}")
+
+    loader = EuphLoader()
+    defaults = loader.export(loader.defaults())
+    dumped = yaml.dump(
+            defaults,
+            Dumper=yaml.SafeDumper,
+            allow_unicode=True,
+    )
+
+    with open(path, "w") as f:
+        f.write(dumped)
+
+def launch(
+        application: Callable[[EuphConfig], urwid.Widget],
+        ) -> None:
+
+    logging.disable(logging.CRITICAL)
+
+    args = parse_arguments()
+
+    if args.export_defaults is not None:
+        export_defaults(args.export_defaults)
+        return
+
+    config = load_config(args)
+    loop = asyncio.get_event_loop()
+
+    main_loop = urwid.MainLoop(
+            application(config),
+            event_loop=urwid.AsyncioEventLoop(loop=loop),
+            palette=config.palette,
+    )
+
+    main_loop.run()

cheuph/euphoria/single_room_application.py

@@ -9,6 +9,7 @@ import yaml
 from ..attributed_text_widget import ATWidget
 from ..markup import AT, Attributes
 from .edit_widgets import EditWidget
+from .launch_application import launch
 from .euph_config import EuphConfig, EuphLoader
 from .room_widget import RoomWidget
 
@@ -129,31 +130,5 @@ class SingleRoomApplication(urwid.WidgetWrap):
 
         return key
 
-def run_single_room_application(config_file: Path) -> None:
-    logging.disable()
-
-    config_yaml: Any
-    try:
-        with open(config_file) as f:
-            config_yaml = yaml.load(f.read(), Loader=yaml.SafeLoader)
-    except FileNotFoundError:
-        config_yaml = {}
-
-    loader = EuphLoader()
-    defaults = loader.defaults()
-    config = EuphConfig(defaults)
-    loader.load_to(config, config_yaml)
-
-    loop = asyncio.get_event_loop()
-
-    main_loop = urwid.MainLoop(
-        SingleRoomApplication(config),
-        event_loop=urwid.AsyncioEventLoop(loop=loop),
-        palette=config.palette,
-    )
-
-    main_loop.run()
-
 if __name__ == "__main__":
-    config_path = Path("~/.cheuph.conf").expanduser()
+    launch(SingleRoomApplication)
-    run_single_room_application(config_path)