Delegating Commands in Click

click_command_delegation.py

import click

@click.group()
def main():
	"""Do things."""

def delegate_command(group, command_name, function, args=None, kwargs=None):
    """
    Takes a function that has been decorated with ``click.group`` and delegates a command to it
    """
    args = args or ()
    kwargs = kwargs or {}
    
	return group.command(command_name)(lambda: function(*args, **kwargs))

def foo(*args, **kwargs):
    print("args = {}".format(args))
    print("kwargs = {}".format(kwargs))

delegate_command(main, "config", foo, args=(2,3,4), kwargs={"a": 7, "b": "cdefg"})

if __name__ == "__main__":
	main()

### Our command has been added:
# $ python click_command_delegation.py --help
# Usage: click_command_delegation.py [OPTIONS] COMMAND [ARGS]...

#   Do things.

# Options:
#   --help  Show this message and exit.

# Commands:
#   config

### Everything seems to be in order. It's an actual command with --help built in.
# $ python click_command_delegation.py config --help
# Usage: click_command_delegation.py config [OPTIONS]

# Options:
#   --help  Show this message and exit.

### And the actual function and arguments (positional and keyword) that we 
### passed in seem to actually do their thing!
# $ python click_command_delegation.py config
# args = (2, 3, 4)
# kwargs = {'a': 7, 'b': 'cdefg'}