python-click/examples/bashcompletion/bashcompletion.py

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import click
import os
@click.group()
def cli():
pass
def get_env_vars(ctx, args, incomplete):
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# Completions returned as strings do not have a description displayed.
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for key in os.environ.keys():
if incomplete in key:
yield key
@cli.command(help='A command to print environment variables')
@click.argument("envvar", type=click.STRING, autocompletion=get_env_vars)
def cmd1(envvar):
click.echo('Environment variable: %s' % envvar)
click.echo('Value: %s' % os.environ[envvar])
@click.group(help='A group that holds a subcommand')
def group():
pass
def list_users(ctx, args, incomplete):
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# You can generate completions with descriptions by returning
# tuples in the form (completion, description).
users = [('bob', 'butcher'),
('alice', 'baker'),
('jerry', 'candlestick maker')]
# Ths will allow completion matches based on matches within the description string too!
return [user for user in users if incomplete in user[0] or incomplete in user[1]]
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@group.command(help='Choose a user')
@click.argument("user", type=click.STRING, autocompletion=list_users)
def subcmd(user):
click.echo('Chosen user is %s' % user)
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cli.add_command(group)