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micromatch/expand-brackets: Expand POSIX bracket expressions (character classes) in glob patterns.

Expand POSIX bracket expressions (character classes) in glob patterns.

Install with npm:

$ npm install --save expand-brackets

Install with yarn:

$ yarn add expand-brackets

var brackets = require('expand-brackets');
brackets(string[, options]);

Params

The main export is a function that takes the following parameters:

pattern {String}: the pattern to convert
options {Object}: optionally supply an options object
returns {String}: returns a string that can be used to create a regex

Example

console.log(brackets('[![:lower:]]'));
//=> '[^a-z]'

Parses the given POSIX character class pattern and returns a string that can be used for creating regular expressions for matching.

Params

pattern {String}
options {Object}
returns {Object}

Takes an array of strings and a POSIX character class pattern, and returns a new array with only the strings that matched the pattern.

Params

arr {Array}: Array of strings to match
pattern {String}: POSIX character class pattern(s)
options {Object}
returns {Array}

Example

const brackets = require('expand-brackets');
console.log(brackets.match(['1', 'a', 'ab'], '[[:alpha:]]'));
//=> ['a']

console.log(brackets.match(['1', 'a', 'ab'], '[[:alpha:]]+'));
//=> ['a', 'ab']

Returns true if the specified string matches the given brackets pattern.

Params

string {String}: String to match
pattern {String}: Poxis pattern
options {String}
returns {Boolean}

Example

const brackets = require('expand-brackets');

console.log(brackets.isMatch('a.a', '[[:alpha:]].[[:alpha:]]'));
//=> true
console.log(brackets.isMatch('1.2', '[[:alpha:]].[[:alpha:]]'));
//=> false

Takes a POSIX character class pattern and returns a matcher function. The returned function takes the string to match as its only argument.

Params

pattern {String}: Poxis pattern
options {String}
returns {Boolean}

Example

const brackets = require('expand-brackets');
const isMatch = brackets.matcher('[[:lower:]].[[:upper:]]');

console.log(isMatch('a.a'));
//=> false
console.log(isMatch('a.A'));
//=> true

Create a regular expression from the given pattern.

Params

pattern {String}: The pattern to convert to regex.
options {Object}
returns {RegExp}

Example

const brackets = require('expand-brackets');
const re = brackets.makeRe('[[:alpha:]]');
console.log(re);
//=> /^(?:[a-zA-Z])$/

Parses the given POSIX character class pattern and returns an object with the compiled output and optional source map.

Params

pattern {String}
options {Object}
returns {Object}

Example

const brackets = require('expand-brackets');
console.log(brackets('[[:alpha:]]'));
// { options: { source: 'string' },
//   input: '[[:alpha:]]',
//   state: {},
//   compilers:
//    { eos: [Function],
//      noop: [Function],
//      bos: [Function],
//      not: [Function],
//      escape: [Function],
//      text: [Function],
//      posix: [Function],
//      bracket: [Function],
//      'bracket.open': [Function],
//      'bracket.inner': [Function],
//      'bracket.literal': [Function],
//      'bracket.close': [Function] },
//   output: '[a-zA-Z]',
//   ast:
//    { type: 'root',
//      errors: [],
//      nodes: [ [Object], [Object], [Object] ] },
//   parsingErrors: [] }

Generate a source map for the given pattern.

Example

var res = brackets('[:alpha:]', {sourcemap: true});

console.log(res.map);
// { version: 3,
//   sources: [ 'brackets' ],
//   names: [],
//   mappings: 'AAAA,MAAS',
//   sourcesContent: [ '[:alpha:]' ] }

The following named POSIX bracket expressions are supported:

[:alnum:]: Alphanumeric characters (a-zA-Z0-9])
[:alpha:]: Alphabetic characters (a-zA-Z])
[:blank:]: Space and tab ([ t])
[:digit:]: Digits ([0-9])
[:lower:]: Lowercase letters ([a-z])
[:punct:]: Punctuation and symbols. ([!"#$%&'()*+, -./:;<=>?@ [\]^_``{|}~])
[:upper:]: Uppercase letters ([A-Z])
[:word:]: Word characters (letters, numbers and underscores) ([A-Za-z0-9_])
[:xdigit:]: Hexadecimal digits ([A-Fa-f0-9])

See posix-character-classes for more details.

Not supported

equivalence classes are not supported
POSIX.2 collating symbols are not supported

Breaking changes

Snapdragon was updated to 0.12. Other packages that integrate expand-brackets need to also use snapdragon 0.12.
Minimum Node.JS version is now version 4.

Breaking changes

Snapdragon was updated to 0.11. Other packages that integrate expand-brackets need to also use snapdragon 0.11.

Breaking changes

The main export now returns the compiled string, instead of the object returned from the compiler

Added features

Adds a .create method to do what the main function did before v2.0.0

In addition to performance and matching improvements, the v0.2.0 refactor adds complete POSIX character class support, with the exception of equivalence classes and POSIX.2 collating symbols which are not relevant to node.js usage.

Added features

parser is exposed, so that expand-brackets parsers can be used by upstream parsers (like micromatch)
compiler is exposed, so that expand-brackets compilers can be used by upstream compilers
source maps

source map example

var brackets = require('expand-brackets');
var res = brackets('[:alpha:]');
console.log(res.map);

{ version: 3,
     sources: [ 'brackets' ],
     names: [],
     mappings: 'AAAA,MAAS',
     sourcesContent: [ '[:alpha:]' ] }

braces: Bash-like brace expansion, implemented in JavaScript. Safer than other brace expansion libs, with complete support… more | homepage
extglob: Extended glob support for JavaScript. Adds (almost) the expressive power of regular expressions to glob… more | homepage
micromatch: Glob matching for javascript/node.js. A drop-in replacement and faster alternative to minimatch and multimatch. | homepage
nanomatch: Fast, minimal glob matcher for node.js. Similar to micromatch, minimatch and multimatch, but complete Bash… more | homepage

Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.

(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)

To generate the readme, run the following command:

$ npm install -g verbose/verb#dev verb-generate-readme && verb

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

$ npm install && npm test

Jon Schlinkert

This file was generated by verb-generate-readme, v0.6.0, on April 30, 2018.

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