Allow to override options

[pallets]

Allow to override options

[douglarek]

@untitaker IMO, maybe Click does not have alias idea. But If we can use -l why we use --list ?

And if you have used argparse, you know --help in @click.option('-h', '--help', is_flag=True, ...) is equal to dest in argparse;

As the issue you mentioned above, you can handle ctx.format_help() with str operation very easily:

def print_help(ctx, value):
    if not value:
        return
    lines = ctx.format_help().replace('-h', '--help/-h')
    print '\n'.join(lines.split('\n')[:-1])
    ctx.exit()

Hope this will help!

[mitsuhiko]

You can remove the default help option through a parameter already. I don't think this feature is necessary.

[zspencer]

the parameter @mitsuhiko is referencing is the add_help_option which is passed to @click.group (and similar decorators) like so: @click.group(add_help_option=False)

[untitaker]

I don't want to remove the help option, i want to create an alias for it. I currently don't think writing around 20 lines of code to remove the help option and add it again (this time with an alias) is very convenient.

[zspencer]

untitaker, the following is a snippet that aliases --help to --wtf:

@click.group(add_help_option=False)
@click.help_option('-w', '--wtf')
def command_a():
  pass

Unfortunately, it doesn't seem sub-commands inherit this behavior; so if you have a subcommand you have to do:

@command_a.command(add_help_option=False)
@click.help_option('-w', '--wtf')
def subcommand():
  pass

So if you have 10 commands you do have to add 20 lines of code :(. I'm sure there's a better way, perhaps by creating a custom command class that inherits from the base command and have it do this automatically; but I haven't dug into the code enough to figure that out.

[mitsuhiko]

I can see this being annoying. Contemplating special casing help here.

[untitaker]

Maybe we could fix this particular "stage" of the problem:

However, click then doesn't recognize -h as an alias for --help and shows
this ugly help output for those options:

-h      Show this message and exit.
--help  Show this message and exit.

And make click recognize two options to be the same when the function names are the same.

[mitsuhiko]

I implemented this through a completely different system now. You can do this now:

DEFAULTS = dict(help_option_names=['-h', '--help'])

@click.command(context_defaults=DEFAULTS)
def cli():
    pass

All commands below that command will then have -h and --help as help options. In case of a conflict the conflicting value is removed.