jw.pkg.cmds.distro.CmdRebootRequired: Add class

Add the command distro.CmdRebootRequired, adding support for "distro
reboot-required". The command exits with status code 1 if a reboot is
required and 0 otherwise.

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

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

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdDistro import CmdDistro
+
+class CmdRebootRequired(Cmd): # export
+
+    def __init__(self, parent: CmdDistro) -> None:
+        super().__init__(parent, 'reboot-required', help="Check whether the machine needs rebooting")
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument('--verbose', default=False, action='store_true', help='Be chatty about the check')
+
+    async def _run(self, args: Namespace) -> None:
+        return await self._backend.run(args)