flag_value is not taken into account with envvar #2746
Description
When using the --debug option DEBUG environment variable in the sample command, the debug value is not correctly set (flag_value). It is expected to be either logging.DEBUG or None, but it seems to be getting the integer value directly from the environment variable.
Sample:
import logging
import os
import sys
import click
# Works as expected
# sys.argv = ['', '--debug']
# Does not work as expected
# os.environ['DEBUG'] = '1'
@click.command()
@click.option('--debug', is_flag=True, flag_value=logging.DEBUG, envvar='DEBUG')
def sample(debug):
click.echo(f"DEBUG: {debug}")
assert debug in [logging.DEBUG, None], f"Invalid debug value: {debug} - expected >{logging.DEBUG}< or None"
if __name__ == '__main__':
sample()There is no different in using os.environ or DEBUG=1 python cli.py.
DEBUG=8 python cli.py prints out: 8
Environment:
- Python version: 3.12.4
- Click version: 8.1.7