blueprint.py

import functools
import click

class Command:
    def __init__(self, f, args, kwargs):
        self.f = f
        self.args = args
        self.kwargs = kwargs
        self.cmd = click.command(*args, **kwargs)(f)

        functools.update_wrapper(self, f)

    def register_to(self, grp):
        grp.add_command(self.cmd)


class Blueprint:
    def __init__(self):
        self._commands = []

    def register_to(self, group):
        for cmd in self._commands:
            cmd.register_to(group)

    def command(self, *args, **kwargs):
        def _decorator(f):
            cmd = Command(f, args, kwargs)
            self._commands.append(cmd)
            return cmd
        return _decorator