click-completion-callback

#!/usr/bin/env python
# -*- coding:utf-8 -*-

from __future__ import print_function, absolute_import

import click_completion

import click

import click_completion.core

click_completion.init()


def install_callback(ctx, attr, value):
    if not value or ctx.resilient_parsing:
        return value
    shell, path = click_completion.core.install()
    click.echo('%s completion installed in %s' % (shell, path))
    exit(0)


@click.command()
@click.option('--install', is_flag=True, callback=install_callback, expose_value=False,
              help="Install completion for the current shell.")
@click.option('--upper/--lower', default=None, help="Change text to upper or lower case")
@click.argument('args', nargs=-1)
def echo(upper, args):
    """just print the command line arguments"""
    if upper:
        args = [arg.upper() for arg in args]
    elif upper is not None:
        args = [arg.lower() for arg in args]
    click.echo(' '.join(args))


if __name__ == "__main__":
    echo()