lib.distros.redhat.Distro: Add missing file

Add the (untested) module lib.distros.redhat.Distro. It had been
lingering in the source tree, but I've apparently forgotten to add it
to Git. It has never seen any real use because CI still doesn't run
a RedHat distro, so it is to be regarded as a stub. Which is better
than nothing.

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

src/python/jw/pkg/lib/distros/redhat/Distro.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, override
+
+from ...Distro import Distro as Base
+from ...pm.rpm import list_files, query_packages, run_rpm
+
+if TYPE_CHECKING:
+    from typing import Any, Collection, Iterable
+
+    from ...base import Result
+    from ...ExecContext import ExecContext
+    from ...Package import Package
+
+class Distro(Base):
+
+    async def yum(
+        self, args: list[str], verbose: bool = True, sudo: bool = True
+    ) -> Result:
+        cmd = ['/usr/bin/yum']
+        cmd.extend(args)
+        if sudo:
+            return await self.sudo(cmd, verbose = verbose)
+        return await self.run(cmd, verbose = verbose)
+
+    async def rpm(
+        self,
+        *args: Any,
+        ec: ExecContext | None = None,
+        **kwargs: Any,
+    ) -> str:
+        if ec is None:
+            ec = self.ctx
+            kwargs['ec'] = ec
+        return await run_rpm(*args, **kwargs)
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        super().__init__(*args, **kwargs)
+
+    @override
+    async def _ref(self) -> None:
+        await self.yum(['clean', 'expire-cache'])
+        await self.yum(['makecache'])
+
+    @override
+    async def _dup(self, download_only: bool) -> None:
+        args: list[str] = ['update']
+        if download_only:
+            args.append('--downloadonly')
+        await self.yum(args)
+
+    @override
+    async def _reboot_required(self, verbose: bool) -> bool:
+        raise NotImplementedError()
+
+    @override
+    async def _select_by_name(self, names: Collection[str]) -> Iterable[Package]:
+        return await query_packages(names, ec = self.ctx)
+
+    @override
+    async def _install(self, names: Iterable[str], only_update: bool) -> None:
+        args = ['update' if only_update else 'install']
+        if not self.interactive:
+            args.append('-y')
+        args.extend(names)
+        await self.yum(args)
+
+    @override
+    async def _delete(self, names: Iterable[str]) -> None:
+        await self.rpm(['-e', *names], sudo = True)
+
+    @override
+    async def _pkg_files(self, name: str) -> Iterable[str]:
+        return await list_files(name, ec = self.ctx)
+
+    async def _download(self, name: str, tmp_dir: str) -> str:
+        raise NotImplementedError(
+            'distro pkg download is not yet implemented for RedHat distributions'
+        )