click auto_envvar_prefix with setuptools

README.md

Trying auto_envvar_prefix with setuptools

pip install --editable .

Trying values-from-environment-variables

$ export GREETER_USERNAME=john
$ greet greet
Hello None!

greet.py

import click

CONTEXT_SETTINGS = dict(
    help_option_names=['-h', '--help'],
    auto_envvar_prefix='GREETER'
)

@click.group(context_settings=CONTEXT_SETTINGS)
def cli():
    pass

@cli.command()
@click.option('--username')
def greet(username):
    click.echo('Hello %s!' % username)

setup.py

from setuptools import setup

setup(
    name='greet',
    version='0.1',
    py_modules=['greet'],
    install_requires=[
        'Click',
    ],
    entry_points='''
        [console_scripts]
        greet=greet:cli
    ''',
)