Jan Lindemann
3e897f4df8
The code below lib.distro, as left behind by the previous commit, is geared towards being directly used as a command-line API. This commit introduces the abstract base class Distro, a proxy for distribution-specific interactions. The proxy abstracts distro specifics into an API with proper method prototypes, not argparse.Namespace contents, and can thus be more easily driven by arbitrary code.
The Distro class is initialized with a member variable of type ExecContext, another new class introduced by this commit. It is designed to abstract the communication channel to the distribution instance. Currently only one specialization exists, Local, which interacts with the distribution and root file system it is running in, but is planned to be subclassed to support interaction via SSH, serial, chroot, or chains thereof.
Signed-off-by: Jan Lindemann <jan@janware.com>
45 lines
1.3 KiB
Python
# -*- coding: utf-8 -*-
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import re, sys
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from argparse import ArgumentParser
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from ..lib.Distro import Distro
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from ..App import App
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from .Cmd import Cmd as Base
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class DistroBase(Base): # export
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def __init__(self, parent: App|Base, name: str, help: str) -> None:
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self.__id = None
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super().__init__(parent, name, help)
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self._add_subcommands()
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self.__distro: Distro|None = None
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@property
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def distro(self) -> Distro:
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if self.__distro is None:
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ret = Distro.instantiate(self.distro_id, ec=self.app.exec_context)
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self.__distro = ret
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return self.__distro
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# --------------- legacy methods
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@property
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def distro_id(self):
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if self.__id is None:
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if self.app.args.id is not None:
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# The distribution ID requested by the command line
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self.__id = self.app.args.id
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else:
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# The ID of the distribution we run on
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self.__id = self.app.distro_id
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return self.__id
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def add_arguments(self, p: ArgumentParser) -> None:
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super().add_arguments(p)
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p.add_argument('--id', default=None, help='Distribution ID (default is taken from /etc/os-release)')
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async def _run(self, args):
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# Missing subcommand
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self.parser.print_help()
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sys.exit(1)
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