Skip to content

Reverse minimist. Convert an object of options into an array of command-line arguments

License

Notifications You must be signed in to change notification settings

sindresorhus/dargs

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

69 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

dargs

Reverse minimist. Convert an object of options into an array of command-line arguments.

Useful when spawning command-line tools.

Install

$ npm install dargs

Usage

import dargs from 'dargs';

const object = {
	_: ['some', 'option'],          // Values in '_' will be appended to the end of the generated argument list
	'--': ['separated', 'option'],  // Values in '--' will be put at the very end of the argument list after the escape option (`--`)
	foo: 'bar',
	hello: true,                    // Results in only the key being used
	cake: false,                    // Prepends `no-` before the key
	camelCase: 5,                   // CamelCase is slugged to `camel-case`
	multiple: ['value', 'value2'],  // Converted to multiple arguments
	pieKind: 'cherry',
	sad: ':('
};

const excludes = ['sad', /.*Kind$/];  // Excludes and includes accept regular expressions
const includes = ['camelCase', 'multiple', 'sad', /^pie.*/];
const aliases = {file: 'f'};

console.log(dargs(object, {excludes}));
/*
[
	'--foo=bar',
	'--hello',
	'--no-cake',
	'--camel-case=5',
	'--multiple=value',
	'--multiple=value2',
	'some',
	'option',
	'--',
	'separated',
	'option'
]
*/

console.log(dargs(object, {excludes, includes}));
/*
[
	'--camel-case=5',
	'--multiple=value',
	'--multiple=value2'
]
*/


console.log(dargs(object, {includes}));
/*
[
	'--camel-case=5',
	'--multiple=value',
	'--multiple=value2',
	'--pie-kind=cherry',
	'--sad=:('
]
*/


console.log(dargs({
	foo: 'bar',
	hello: true,
	file: 'baz'
}, {aliases}));
/*
[
	'--foo=bar',
	'--hello',
	'-f', 'baz'
]
*/

API

dargs(object, options?)

object

Type: object

Object to convert to command-line arguments.

options

Type: object

excludes

Type: Array<string | RegExp>

Keys or regex of keys to exclude. Takes precedence over includes.

includes

Type: Array<string | RegExp>

Keys or regex of keys to include.

aliases

Type: object

Maps keys in object to an aliased name. Matching keys are converted to arguments with a single dash (-) in front of the aliased key and the value in a separate array item. Keys are still affected by includes and excludes.

useEquals

Type: boolean
Default: true

Setting this to false makes it return the key and value as separate array items instead of using a = separator in one item. This can be useful for tools that doesn't support --foo=bar style flags.

import dargs from 'dargs';

console.log(dargs({foo: 'bar'}, {useEquals: false}));
/*
[
	'--foo', 'bar'
]
*/
shortFlag

Type: boolean
Default: true

Make a single character option key {a: true} become a short flag -a instead of --a.

import dargs from 'dargs';

console.log(dargs({a: true}));
//=> ['-a']

console.log(dargs({a: true}, {shortFlag: false}));
//=> ['--a']
ignoreTrue

Type: boolean
Default: false

Exclude true values. Can be useful when dealing with argument parsers that only expect negated arguments like --no-foo.

ignoreFalse

Type: boolean
Default: false

Exclude false values. Can be useful when dealing with strict argument parsers that throw on unknown arguments like --no-foo.

allowCamelCase

Type: boolean
Default: false

By default, camel-cased keys will be hyphenated. Enabling this will bypass the conversion process.

import dargs from 'dargs';

console.log(dargs({fooBar: 'baz'}));
//=> ['--foo-bar', 'baz']

console.log(dargs({fooBar: 'baz'}, {allowCamelCase: true}));
//=> ['--fooBar', 'baz']

Get professional support for this package with a Tidelift subscription
Tidelift helps make open source sustainable for maintainers while giving companies
assurances about security, maintenance, and licensing for their dependencies.