ansible/hacking/build_library/build_ansible/commands.py
Toshio Kuratomi 957ad8e769 Fix the command plugin to use the ABCMeta metaclass
The abstract* decorators don't have any effect unless the class has an
ABCMeta metaclass.
2020-05-14 09:14:37 -07:00

50 lines
1.5 KiB
Python

# coding: utf-8
# Copyright: (c) 2019, Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from abc import ABCMeta, abstractmethod, abstractproperty
class Command(metaclass=ABCMeta):
"""
Subcommands of :program:`build-ansible.py`.
This defines an interface that all subcommands must conform to. :program:`build-ansible.py`
will require that these things are present in order to proceed.
"""
@staticmethod
@abstractproperty
def name():
"""Name of the subcommand. It's the string to invoked it via on the command line"""
@staticmethod
@abstractmethod
def init_parser(add_parser):
"""
Initialize and register an argparse ArgumentParser
:arg add_parser: function which creates an ArgumentParser for the main program.
Implementations should first create an ArgumentParser using `add_parser` and then populate
it with the command line arguments that are needed.
.. seealso:
`add_parser` information in the :py:meth:`ArgumentParser.add_subparsers` documentation.
"""
@staticmethod
@abstractmethod
def main(arguments):
"""
Run the command
:arg arguments: The **parsed** command line args
This is the Command's entrypoint. The command line args are already parsed but from here
on, the command can do its work.
"""