Format click help output nicely with rich
Project description
rich-click
Format click help output nicely with Rich.
- Click is a "Python package for creating beautiful command line interfaces".
- Rich is a "Python library for rich text and beautiful formatting in the terminal".
The intention of rich-click is to provide attractive help output from
click, formatted with rich, with minimal customisation required.
Screenshots
| Native click help | With rich-click |
|---|---|
 |
 |
Installation
You can install rich-click from the Python Package Index (PyPI) with pip or equivalent.
python -m pip install rich-click
Usage
There are two main ways to set up rich-click formatting for your tool.
Which you choose will depend on your use-case and your personal disposition:
The path of least typing
Monkey patching is probably bad and you should only use this method if you are a Responsible Developer. It's also good if you're lazy, as it requires very little typing. In fact, the whole thing can be done in just four lines:
import click
import rich_click
click.Group.format_help = rich_click.rich_format_help
click.Command.format_help = rich_click.rich_format_help
This overwrites the default click methods with those from the rich-click package.
As such, no other changes are needed - just continue to use click as you would
normally and it will use these custom methods to print your help output.
The good and proper way
If using monkey-patching in your project makes your palms sweaty and your pulse race,
then you'll be pleased to know that you can also use rich-click in a nicely
declarative and verbose manner:
import click
import rich_click
class RichClickGroup(click.Group):
def format_help(self, ctx, formatter):
rich_click.rich_format_help(self, ctx, formatter)
class RichClickCommand(click.Command):
def format_help(self, ctx, formatter):
rich_click.rich_format_help(self, ctx, formatter)
@click.group(cls=RichClickGroup)
@click.option('--debug/--no-debug', default=False)
def cli(debug):
click.echo(f"Debug mode is {'on' if debug else 'off'}")
@cli.command(cls=RichClickCommand)
def sync():
click.echo('Syncing')
(example based on the click docs)
Here we are making new Group and Command child classes that are based on click.
We define our custom format_help() functions and then tell click to to use these classes with the cls argument.
Customisation
There isn't really much you can customise yet, but this is planned. I'm thinking:
- Colours
- Whether to print positional arguments or not
- Could maybe provide custom args to give help text to these
- The ability to break up commands and options into multiple named panels
Contributing
Contributions and suggestions for new features are welcome, as are bug reports! Please create a new issue or better still, dive right in with a pull-request.
Credits
This package was put together hastily by Phil Ewels (@ewels), but the hard work was really done by Will McGugan (@willmcgugan) who not only is the author of Rich but also wrote the original code that this package is based on.
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