jw.pkg.cmds.distro.backend.redhat: Add Module

Add backend for YAM-based package management, as used by RHEL,
Fedora, CentOS.

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

src/python/jw/pkg/cmds/distro/backend/redhat/Base.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+
+from ...Cmd import Cmd
+from ..BackendCmd import BackendCmd
+
+class Base(BackendCmd):
+
+    def __init__(self, parent: Cmd):
+        super().__init__(parent)
+
+    async def yum(self, *args):
+        cmd = ['/usr/bin/yum']
+        cmd.extend(args)
+        return await self._sudo(cmd)

src/python/jw/pkg/cmds/distro/backend/redhat/Dup.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace
+
+from ...Cmd import Cmd
+from .Base import Base
+
+class Dup(Base):
+
+    def __init__(self, parent: Cmd):
+        super().__init__(parent)
+
+    async def run(self, args: Namespace):
+        raise NotImplementedError('distro dup is not yet implemented for Red Hat-like distributions')

src/python/jw/pkg/cmds/distro/backend/redhat/Install.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace
+
+from ...Cmd import Cmd
+from .Base import Base
+
+class Install(Base):
+
+    def __init__(self, parent: Cmd):
+        super().__init__(parent)
+
+    async def run(self, args: Namespace):
+        yum_args = ['install']
+        if not self.interactive:
+            yum_args.append['-y']
+        yum_args.extend(args.packages)
+        return await self.yum(*yum_args)

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

@@ -0,0 +1,4 @@
+TOPDIR = ../../../../../../../..
+
+include $(TOPDIR)/make/proj.mk
+include $(JWBDIR)/make/py-mod.mk

src/python/jw/pkg/cmds/distro/backend/redhat/Refresh.py

@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+
+from argparse import Namespace
+
+from ...Cmd import Cmd
+from .Base import Base
+
+class Refresh(Base):
+
+    def __init__(self, parent: Cmd):
+        super().__init__(parent)
+
+    async def run(self, args: Namespace):
+        await self.yum('clean', 'expire-cache')
+        await self.yum('makecache')