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Support defaults

See original GitHub issue

It’d be sweet if this library also supported default arguments. The API could look like this:

arg({
  '--help': Boolean,
  '-h': '--help',

  '--branch': String,
  '-b': '--branch',

  '--config': './config',
  '-c': '--config'
})

You could distinguish between String and a String argument with a default by doing:

if (value === String) {
  // it's a string argument
}

if (typeof value === 'string') {
  // it's a string argument with a default
}

Issue Analytics

State:
Created 4 years ago
Comments:8 (4 by maintainers)

Top GitHub Comments

1reaction

rauschmacommented, Jul 4, 2019

@Qix- Suggestion: add this example to the project’s readme.

1reaction

Qix-commented, Apr 26, 2019

@matthewmueller Here’s an example for a utility I am writing at the moment:

const args = arg({
	'--help': Boolean,
	'-h': '--help',

	'--out-dir': String,
	'-o': '--out-dir',

	'--numeric-bold': Boolean,
	'-B': '--numeric-bold',

	'--bold': Number,
	'-b': '--bold',

	'--normal': Number,
	'-N': '--normal',

	'--path': String,
	'-p': '--path',

	'--out-name': String,
	'-O': '--out-name'
});

const {
	'--bold': boldWeight = 700,
	'--normal': normalWeight = 400,
	'--out-name': outputName = 'fonts'
} = args;