main.py

#!/usr/bin/env python

# REPRO: ./main.py subcmd --customer=customer1 cmd
# PROBLEM: dummy still get's prompted
# DESIRED: dummy get's read from the "config file" and not prompted

from functools import update_wrapper
from copy import deepcopy

import click


def update_context(initial, kwargs):
    ctx = initial
    for k, v in kwargs.iteritems():
        ctx[k] = v
    return ctx


def read_config(customer):
    if customer == 'customer1':
        return {'dummy': 'config value for customer1'}
    else:
        return {'dummy': 'something else'}


def customer_option(f):
    # This should merge in all the stuff from the config file
    def callback(ctx, param, value):
        c = read_config(value)
        for k, v in c.iteritems():
            if k not in ctx.obj:
                ctx.obj[k] = v
        return value
    return click.option('--customer', "-c",
        callback=callback,
        prompt=True,
        is_eager=True,
        help='Customer name.')(f)


@click.group()
@click.pass_context
def main(ctx, **kwargs):
    ctx.obj = update_context({}, kwargs)
    print "running main"


@click.group()
@click.option('--dummy', prompt=True, help="Dummy value that's different for each customer")
@customer_option
@click.pass_context
def subcmd(ctx, **kwargs):
    ctx.obj = update_context(deepcopy(ctx.obj), kwargs)
    print "runnning group"


@click.command('cmd')
@click.pass_context
def cmd(ctx):
    print "running command"

main.add_command(subcmd)

subcmd.add_command(cmd)

if __name__ == '__main__':
    a = main()