rewrite options with click

+ fix cpu count multiprocessing errors

main.py

@@ -0,0 +1,74 @@
+import multiprocessing
+import pathlib
+import click
+import sys
+from app.arg_handler import handle_build, handle_password_reset
+from app.utils.filesystem import get_home_res_path
+from app.utils.xdg_utils import get_xdg_config_dir
+from manage import run_app
+
+
+def version(*args, **kwargs):
+    if not args[2]:
+        return
+
+    path = get_home_res_path("version.txt")
+    if not path:
+        click.echo("Version file not found.")
+        sys.exit(1)
+
+    with open(path, "r") as f:
+        version = f.read()
+
+    click.echo(version)
+    sys.exit(0)
+
+
+@click.command(options_metavar="<options>", context_settings={"show_default": True})
+@click.option(
+    "--build",
+    default=False,
+    help="Build the project.",
+    is_eager=True,
+    callback=handle_build,
+    is_flag=True,
+)
+@click.option("--host", default="0.0.0.0", help="Host to run the app on.")
+@click.option("--port", default=1970, help="HTTP port to run the app on.")
+@click.option(
+    "--config",
+    default=lambda: get_xdg_config_dir(),
+    show_default="XDG_CONFIG_HOME",
+    help="Path to the config file.",
+    type=click.Path(
+        exists=True,
+        file_okay=False,
+        dir_okay=True,
+        writable=True,
+        resolve_path=True,
+        allow_dash=False,
+        path_type=pathlib.Path,
+    ),
+)
+@click.option(
+    "--password-reset",
+    is_flag=True,
+    help="Reset the password.",
+    is_eager=True,
+    callback=handle_password_reset,
+)
+@click.option(
+    "--version",
+    is_flag=True,
+    default=False,
+    callback=version,
+    help="Show the version and exit",
+    is_eager=True,
+)
+def run(*args, **kwargs):
+    run_app(kwargs["host"], kwargs["port"], kwargs["config"])
+
+
+if __name__ == "__main__":
+    multiprocessing.freeze_support()
+    run()