argsclopts

cliclopts but for Node.js parseArgs. A library that formats standard usage strings using the node:util parseArgs options object shape with an additional help field added to it.

npm install argsclopts

Usage

import { printHelpText } from 'argsclopts'
import { join } from 'node:path'
import { parseArgs } from 'node:util'

/**
 * @typedef {import('argsclopts').ArgscloptsParseArgsOptionsConfig} ArgscloptsParseArgsOptionsConfig
 */

const pkgPath = join(import.meta.dirname, 'package.json')

/** @type {ArgscloptsParseArgsOptionsConfig} */
const options = {
  foo: {
    type: 'boolean',
    short: 'f',
    help: 'A foo flag thats a boolean'
  },
  bar: {
    type: 'string',
    help: 'A bar flag thats a string'
  }
}

await printHelpText({
  options,
  pkgPath
})
/*

Usage: argsclopts [options]

    Example: argsclopts

    --foo, -f             A foo flag thats a boolean
    --bar                 A bar flag thats a string

argsclopts (v1.0.0)

 */

const args = ['-f', '--bar', 'b']
const { values } = parseArgs({ args, options })
console.log(values)
// { foo: true, bar: 'b' }

API

import { formatHelpText, printHelpText, usage, header, footer } from 'argsclopts'

You can import formatHelpText, printHelpText, usage, header, footer from argsclopts. s

helpText = formatHelpText({ options, [pkgPath], [name], [version], [footerFn], [headerFn], [exampleFn]})

Generate the helptText string. Requires passing in an options object that you provide to parseArgs, with one additional field per flag: help. You should also provide pkgPath (a resolved path the package.json) so that a bin name and version can be resolved. Otherwise, pass in a name and version to override any resolved data from pkgPath. If both name and version are provided, a pkgPath is required. The headerFn, and exampleFn can be used to override the header text and the footerFn can be used to override the footer text.

An example options object might look like this:

const options = {
  foo: {
    type: 'boolean',
    short: 'f',
    help: 'A foo flag thats a boolean'
  },
  bar: {
    type: 'string',
    help: 'A bar flag thats a string'
  }
}

void printHelpText({ options, [pkgPath], [name], [version], [footerFn], [headerFn], [exampleFn]})

Exactly the same as formatHelpText except it uses console.log to print the text for you. Returns nothing.

usageText = usage(options)

Generate just the usage string with a given options object.

`headerText = header({ [pkgPath], [name], [headerFn], [exampleFn] })

Generate the headerText only. Pass in either a pkgPath string path to the package.json of the bin you are printing for, or a name. The headerFn and exampleFn allow you to override the header text that is generated. Each function receilves an object with a name key.

footerText = footer({ [pkgPath], [name], [version], [footerFn] })

Generate the footerText only. Pass in either a pkgPath string path to the package.json of the bin you are printing for, or a name and/or version. The footerFn lets you override the footer text template and receives an object with a name and version key.

License

MIT