@jil/args

> A convention based argument parsing and formatting library, with strict validation checks. It _is not_ a command line
> interface.

``ts
import {parse} from '@jil/args';

interface Options {
help: boolean;
logLevel: 'info' | 'error' | 'warn';
version: boolean;
}

const {command, errors, options, params, rest} = parse(process.argv.slice(2), {
commands: ['build', 'install', 'update'],
options: {
help: {
default: false,
description: 'Show a help menu',
type: 'boolean',
short: 'H',
},
logLevel: {
choices: ['info', 'error', 'warn'],
default: 'info',
description: 'Customize logging level',
},
version: {
default: false,
description: 'Show the version number',
type: 'boolean',
short: 'V',
},
},
});
`

Features

- Commands and sub-commands: cmd, cmd:sub
- Options (long and short) that set a value(s): --foo value, --foo=value, -f value, -f=value
- Camel (preferred) or kebab cased option names.
- Flags (boolean options) that take no value: --bar, -B
- With implicit negation support: --no-bar
- Parameters that act as standalone values: foo bar baz
- Can be marked as required.
- Rest arguments that are passed to subsequent scripts (aggregated after --): foo -- bar
- Supports string, number, boolean, and list based values, with the addition of:
- Single value based on a list of possible choices.
- Multiple values with optional arity count requirements.
- Group multiple short options under a single argument: -fBp
- Increment a counter each time a short option is found in a group.
- Strict parser and validation checks, allowing for informative interfaces.
- Custom option and param validation for increased accuracy.

Installation

`
npm i @jil/args
``

Documentation

- https://boostlib.dev/docs/args
- https://boostlib.dev/api/args