JarCastingdargs 
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
const dargs = require('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.
const dargs = require('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.
const dargs = require('dargs');
console.log(dargs({a: true}));
//=> ['-a']
console.log(dargs({a: true}, {shortFlag: false}));
//=> ['--a']
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.
const dargs = require('dargs');
console.log(dargs({fooBar: 'baz'}));
//=> ['--foo-bar', 'baz']
console.log(dargs({fooBar: 'baz'}, {allowCamelCase: true}));
//=> ['--fooBar', 'baz']
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