Python 单击多个命令名称

Python Click multiple command names

是否可以通过 Python Click 执行类似的操作?

@click.command(name=['my-command', 'my-cmd'])
def my_command():
    pass

我希望我的命令行是这样的:

mycli my-command

mycli my-cmd 

但引用相同的函数。

我需要像 AliasedGroup 这样的 class 吗?

AliasedGroup 不是您想要的,因为它允许最短的前缀匹配,而且您似乎需要实际的别名。但该示例确实提供了可行方向的提示。它继承自 click.Group 并覆盖了一些行为。

这是一种实现您所追求的目标的方法:

自定义Class

此 class 覆盖了用于修饰命令函数的 click.Group.command() 方法。它增加了传递命令别名列表的能力。此 class 还添加了一个简短的帮助,其中引用了别名命令。

class CustomMultiCommand(click.Group):

    def command(self, *args, **kwargs):
        """Behaves the same as `click.Group.command()` except if passed
        a list of names, all after the first will be aliases for the first.
        """
        def decorator(f):
            if isinstance(args[0], list):
                _args = [args[0][0]] + list(args[1:])
                for alias in args[0][1:]:
                    cmd = super(CustomMultiCommand, self).command(
                        alias, *args[1:], **kwargs)(f)
                    cmd.short_help = "Alias for '{}'".format(_args[0])
            else:
                _args = args
            cmd = super(CustomMultiCommand, self).command(
                *_args, **kwargs)(f)
            return cmd

        return decorator

使用自定义 Class

通过将 cls 参数传递给 click.group() 装饰器,任何通过 group.command() 添加到组中的命令都可以传递一个命令名称列表。

@click.group(cls=CustomMultiCommand)
def cli():
    """My Excellent CLI"""

@cli.command(['my-command', 'my-cmd'])
def my_command():
    ....

测试代码:

import click

@click.group(cls=CustomMultiCommand)
def cli():
    """My Excellent CLI"""


@cli.command(['my-command', 'my-cmd'])
def my_command():
    """This is my command"""
    print('Running the command')


if __name__ == '__main__':
    cli('--help'.split())

测试结果:

Usage: my_cli [OPTIONS] COMMAND [ARGS]...

  My Excellent CLI

Options:
  --help  Show this message and exit.

Commands:
  my-cmd      Alias for 'my-command'
  my-command  This is my command

这里有一个更简单的方法来解决同样的问题:

class AliasedGroup(click.Group):
    def get_command(self, ctx, cmd_name):
        try:
            cmd_name = ALIASES[cmd_name].name
        except KeyError:
            pass
        return super().get_command(ctx, cmd_name)


@click.command(cls=AliasedGroup)
def cli():
    ...

@click.command()
def install():
    ...

@click.command()
def remove():
    ....


cli.add_command(install)
cli.add_command(remove)


ALIASES = {
    "it": install,
    "rm": remove,
}

既然有人问了这个问题,就创建了一个click-aliases library

它的工作方式有点像其他答案,只是您不必自己声明命令 class:

import click
from click_aliases import ClickAliasedGroup

@click.group(cls=ClickAliasedGroup)
def cli():
    pass

@cli.command(aliases=['my-cmd'])
def my_command():
    pass