jw.pkg.cmds.distro.CmdInstall: Add module

Add CmdRefresh, the class providing the "jw-pkg.py distro install"
subcommand.

Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/cmds/distro/CmdInstall.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdDistro import CmdDistro
+
+class CmdInstall(Cmd): # export
+
+    def __init__(self, parent: CmdDistro) -> None:
+        super().__init__(parent, 'install', help="Install the distribution's notion of available packages")
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument("packages", nargs="*", help="Packages to be installed")
+
+    async def _run(self, args: Namespace) -> None:
+        return await self._backend.run(args)