jw.pkg.cmds.distro: Add directory

Add the subdirectory structure for the distro subcommand.

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

src/python/jw/pkg/cmds/CmdDistro.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+
+import re, sys
+from argparse import ArgumentParser
+
+from ..App import App
+from .Cmd import Cmd as CmdBase
+
+class CmdDistro(CmdBase): # export
+
+    def __init__(self, parent: App) -> None:
+        self.__id = None
+        super().__init__(parent, 'distro', help="System package manager wrapper")
+        self._add_subcommands()
+        self.__interactive: bool|None = None
+
+    @property
+    def distro_id(self):
+        if self.__id is None:
+            if self.app.args.id is not None:
+                self.__id = self.app.args.id
+            else:
+                os_release = '/etc/os-release'
+                with open(os_release, 'r') as file:
+                    matches = re.findall(r'^ID="?([^"]+)"?$', file.read(), re.MULTILINE)
+                    if len(matches) != 1:
+                        raise Exception(f'Could not read "ID=" from "{os_release}"')
+                    self.__id = matches[0]
+        return self.__id
+
+    def add_arguments(self, p: ArgumentParser) -> None:
+        super().add_arguments(p)
+        p.add_argument('--id', default=None, help='Distribution ID (default is taken from /etc/os-release)')
+        p.add_argument('--interactive', choices=['true', 'false', 'auto'], default='false', help="Wait for user input or try to proceed unattended")
+
+    @property
+    def interactive(self) -> bool:
+        if self.__interactive is None:
+            match self.app.args.interactive:
+                case 'true':
+                    self.__interactive = True
+                case 'false':
+                    self.__interactive = False
+                case 'auto':
+                    self.__interactive = sys.stdin.isatty()
+        return self.__interactive
+
+    async def _run(self, args):
+        raise Exception("Running with args", args)

src/python/jw/pkg/cmds/__init__.py

@@ -1 +1,2 @@
 from .CmdProjects import CmdProjects
+from .CmdDistro import CmdDistro

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

@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+
+import os, importlib
+
+from ..Cmd import Cmd as Base
+from ..CmdDistro import CmdDistro
+
+class Cmd(Base): # export
+
+    def __init__(self, parent: CmdDistro, name: str, help: str) -> None:
+        super().__init__(parent, name, help)
+        self.__backend = None
+
+    @property
+    def distro_id(self) -> str:
+        return self.parent.distro_id
+
+    @property
+    def interactive(self) -> bool:
+        return self.parent.interactive
+
+    @property
+    def _backend(self):
+        if self.__backend is None:
+            class_name = self.__class__.__name__[3:] # Get rid of "Cmd"
+            backend_id = self.parent.distro_id.lower().replace('-', '_')
+            match backend_id:
+                case 'ubuntu' | 'raspbian':
+                    backend_id = 'debian'
+                case 'centos':
+                    backend_id = 'redhat'
+                case 'opensuse_tumbleweed':
+                    backend_id = 'suse'
+            module_name = (
+                os.path.splitext(__name__)[0]
+                + '.backend.'
+                + backend_id
+                + '.'
+                + class_name
+            )
+            module = importlib.import_module(module_name)
+            cls = getattr(module, class_name)
+            self.__backend = cls(self)
+        return self.__backend

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

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