cmds.posix.Tar: Add command

Add a "jw-pkg posix tar" command. Currently the only thing that can
be done with it is extracting.

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

src/python/jw/pkg/cmds/posix/CmdTar.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdPosix import CmdPosix
+
+class CmdTar(Cmd): # export
+
+    def __init__(self, parent: CmdPosix) -> None:
+        super().__init__(parent, 'tar', help='Handle tar archives')
+        self._add_subcommands()
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+
+    async def _run(self, args: Namespace) -> None:
+        return await super()._run(args)

src/python/jw/pkg/cmds/posix/tar/Cmd.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace, ArgumentParser
+from contextlib import asynccontextmanager
+
+from ..Cmd import Cmd as Base
+from ..CmdTar import CmdTar as Parent
+
+from ....lib.TarIo import TarIo
+from ....lib.ProcFilterGpg import ProcFilterGpg
+from ....lib.FileContext import FileContext
+
+class Cmd(Base): # export
+
+    def __init__(self, parent: Parent, name: str, help: str) -> None:
+        super().__init__(parent, name, help)
+        self.__tar_io: None = None
+
+    @asynccontextmanager
+    async def ctx(self, **kwargs) -> TarIo:
+        async with TarIo.create(src_uri=self.app.args.archive_path, **kwargs) as ret:
+            ret.src.add_proc_filter(FileContext.Direction.In, ProcFilterGpg(ec=self.app.exec_context))
+            yield ret
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument('-f', '--archive-path', required=True, help='Archive path')

src/python/jw/pkg/cmds/posix/tar/CmdExtract.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from argparse import Namespace, ArgumentParser
+
+from .Cmd import Cmd
+from ..CmdTar import CmdTar
+
+from ....lib.FileContext import FileContext
+
+class CmdExtract(Cmd): # export
+
+    def __init__(self, parent: CmdTar) -> None:
+        super().__init__(parent, 'x', help="Extract a tar archive")
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        super().add_arguments(parser)
+        parser.add_argument('dst', help='Destination root URI')
+
+    async def _run(self, args: Namespace) -> None:
+        async with self.ctx(
+                dst_uri = args.dst,
+            ) as ctx:
+            await ctx.extract(ctx.dst.root)

src/python/jw/pkg/cmds/posix/tar/Makefile

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