jw/pkg/cmds/distro/CmdPkg: Add distro pkg ls

Add the distro subcommand class CmdPkg, together with a first
subcommand ls, which prints a list of files contained in a package.

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

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

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdDistro import CmdDistro
+
+class CmdPkg(Cmd): # export
+
+    def __init__(self, parent: CmdDistro) -> None:
+        super().__init__(parent, 'pkg', help="Show package information")
+        self._add_subcommands()
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument('--name', help='Package name')
+
+    async def _run(self, args: Namespace) -> None:
+        return await self._backend.run(args)

src/python/jw/pkg/cmds/distro/backend/BePkg.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import annotations
+from typing import TYPE_CHECKING
+
+import abc
+from typing import Iterable
+
+from .Backend import Backend as Base
+
+if TYPE_CHECKING:
+    from ..CmdPkg import CmdPkg as Parent
+
+class BePkg(Base):
+
+    def __init__(self, parent: Parent):
+        super().__init__(parent)
+
+    async def list_files(self, name: str) -> Iterable[str]:
+        return await self._list_files(name)
+
+    @abc.abstractmethod
+    async def _list_files(self, name: str) -> Iterable[str]:
+        pass

src/python/jw/pkg/cmds/distro/backend/suse/Pkg.py

@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+
+from typing import Iterable
+from argparse import Namespace
+
+from ...lib.Package import Package
+from ...lib.rpm import list_files
+from ...Cmd import Cmd
+from ..BePkg import BePkg as Base
+
+class Pkg(Base):
+
+    def __init__(self, parent: Cmd):
+        super().__init__(parent)
+
+    async def _list_files(self, name: str) -> Iterable[Package]:
+        return await list_files(name)

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

@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+from ..Cmd import Cmd as Base
+from ..CmdPkg import CmdPkg as Parent
+
+class Cmd(Base): # export
+
+    from ..backend.Backend import Backend
+
+    def __init__(self, parent: Parent, name: str, help: str) -> None:
+        super().__init__(parent, name, help)
+
+    @property
+    def _backend(self) -> Backend:
+        return self.parent._backend

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

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdPkg import CmdPkg
+
+class CmdLs(Cmd): # export
+
+    def __init__(self, parent: CmdPkg) -> None:
+        super().__init__(parent, 'ls', help="List package contents")
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+
+    async def _run(self, args: Namespace) -> None:
+        files = await self._backend.list_files(args.name)
+        print('\n'.join(files))

src/python/jw/pkg/cmds/distro/pkg/Makefile

@@ -0,0 +1,5 @@
+TOPDIR = ../../../../../../..
+#PY_UPDATE_INIT_PY = false
+
+include $(TOPDIR)/make/proj.mk
+include $(JWBDIR)/make/py-mod.mk