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# brace-expansion | |
[Brace expansion](https://www.gnu.org/software/bash/manual/html_node/Brace-Expansion.html), | |
as known from sh/bash, in JavaScript. | |
[![build status](https://secure.travis-ci.org/juliangruber/brace-expansion.svg)](http://travis-ci.org/juliangruber/brace-expansion) | |
[![downloads](https://img.shields.io/npm/dm/brace-expansion.svg)](https://www.npmjs.org/package/brace-expansion) | |
[![Greenkeeper badge](https://badges.greenkeeper.io/juliangruber/brace-expansion.svg)](https://greenkeeper.io/) | |
[![testling badge](https://ci.testling.com/juliangruber/brace-expansion.png)](https://ci.testling.com/juliangruber/brace-expansion) | |
## Example | |
```js | |
var expand = require('brace-expansion'); | |
expand('file-{a,b,c}.jpg') | |
// => ['file-a.jpg', 'file-b.jpg', 'file-c.jpg'] | |
expand('-v{,,}') | |
// => ['-v', '-v', '-v'] | |
expand('file{0..2}.jpg') | |
// => ['file0.jpg', 'file1.jpg', 'file2.jpg'] | |
expand('file-{a..c}.jpg') | |
// => ['file-a.jpg', 'file-b.jpg', 'file-c.jpg'] | |
expand('file{2..0}.jpg') | |
// => ['file2.jpg', 'file1.jpg', 'file0.jpg'] | |
expand('file{0..4..2}.jpg') | |
// => ['file0.jpg', 'file2.jpg', 'file4.jpg'] | |
expand('file-{a..e..2}.jpg') | |
// => ['file-a.jpg', 'file-c.jpg', 'file-e.jpg'] | |
expand('file{00..10..5}.jpg') | |
// => ['file00.jpg', 'file05.jpg', 'file10.jpg'] | |
expand('{{A..C},{a..c}}') | |
// => ['A', 'B', 'C', 'a', 'b', 'c'] | |
expand('ppp{,config,oe{,conf}}') | |
// => ['ppp', 'pppconfig', 'pppoe', 'pppoeconf'] | |
``` | |
## API | |
```js | |
var expand = require('brace-expansion'); | |
``` | |
### var expanded = expand(str) | |
Return an array of all possible and valid expansions of `str`. If none are | |
found, `[str]` is returned. | |
Valid expansions are: | |
```js | |
/^(.*,)+(.+)?$/ | |
// {a,b,...} | |
``` | |
A comma separated list of options, like `{a,b}` or `{a,{b,c}}` or `{,a,}`. | |
```js | |
/^-?\d+\.\.-?\d+(\.\.-?\d+)?$/ | |
// {x..y[..incr]} | |
``` | |
A numeric sequence from `x` to `y` inclusive, with optional increment. | |
If `x` or `y` start with a leading `0`, all the numbers will be padded | |
to have equal length. Negative numbers and backwards iteration work too. | |
```js | |
/^-?\d+\.\.-?\d+(\.\.-?\d+)?$/ | |
// {x..y[..incr]} | |
``` | |
An alphabetic sequence from `x` to `y` inclusive, with optional increment. | |
`x` and `y` must be exactly one character, and if given, `incr` must be a | |
number. | |
For compatibility reasons, the string `${` is not eligible for brace expansion. | |
## Installation | |
With [npm](https://npmjs.org) do: | |
```bash | |
npm install brace-expansion | |
``` | |
## Contributors | |
- [Julian Gruber](https://github.com/juliangruber) | |
- [Isaac Z. Schlueter](https://github.com/isaacs) | |
## Sponsors | |
This module is proudly supported by my [Sponsors](https://github.com/juliangruber/sponsors)! | |
Do you want to support modules like this to improve their quality, stability and weigh in on new features? Then please consider donating to my [Patreon](https://www.patreon.com/juliangruber). Not sure how much of my modules you're using? Try [feross/thanks](https://github.com/feross/thanks)! | |
## License | |
(MIT) | |
Copyright (c) 2013 Julian Gruber <[email protected]> | |
Permission is hereby granted, free of charge, to any person obtaining a copy of | |
this software and associated documentation files (the "Software"), to deal in | |
the Software without restriction, including without limitation the rights to | |
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
of the Software, and to permit persons to whom the Software is furnished to do | |
so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in all | |
copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
SOFTWARE. | |