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import os
import click
from click.shell_completion import CompletionItem
@click.group()
def cli():
pass
@cli.command()
@click.option("--dir", type=click.Path(file_okay=False))
def ls(dir):
click.echo("\n".join(os.listdir(dir)))
def get_env_vars(ctx, param, args, incomplete):
# Returning a list of values is a shortcut to returning a list of
# CompletionItem(value).
return [k for k in os.environ if incomplete in k]
@cli.command(help="A command to print environment variables")
@click.argument("envvar", shell_complete=get_env_vars)
def show_env(envvar):
click.echo(f"Environment variable: {envvar}")
click.echo(f"Value: {os.environ[envvar]}")
@cli.group(help="A group that holds a subcommand")
def group():
pass
def list_users(ctx, args, incomplete):
# You can generate completions with help strings by returning a list
# of CompletionItem. You can match on whatever you want, including
# the help.
items = [("bob", "butcher"), ("alice", "baker"), ("jerry", "candlestick maker")]
for value, help in items:
if incomplete in value or incomplete in help:
yield CompletionItem(value, help=help)
@group.command(help="Choose a user")
@click.argument("user", type=click.STRING, autocompletion=list_users)
def select_user(user):
click.echo(f"Chosen user is {user}")
cli.add_command(group)
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