🚀 fast-glob

Is a faster node-glob alternative.

💡 Highlights

• 🚀 Fast by using Streams and Promises. Used readdir-enhanced and micromatch.
• 🔰 User-friendly by supports multiple and negated patterns (['*', '!*.md']).
• 🚦 Rational, because it doesn't read excluded directories (!**/node_modules).
• ⚙️ Universal, because it supports Synchronous, Promise and Stream API.
• 💸 Economy, because it provides fs.Stats for matched path if you wanted.

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Install

$ npm install --save fast-glob

Usage

Asynchronous

const fg = require('fast-glob');

fg(['src/**/*.js', '!src/**/*.spec.js']).then((entries) => console.log(entries));
fg.async(['src/**/*.js', '!src/**/*.spec.js']).then((entries) => console.log(entries));

Synchronous

const fg = require('fast-glob');

const entries = fg.sync(['src/**/*.js', '!src/**/*.spec.js']);
console.log(entries);

Stream

const fg = require('fast-glob');

const stream = fg.stream(['src/**/*.js', '!src/**/*.spec.js']);

const entries = [];

stream.on('data', (entry) => entries.push(entry));
stream.once('error', console.log);
stream.once('end', () => console.log(entries));

API

fg(patterns, [options])

fg.async(patterns, [options])

Returns a Promise<Array> of matching entries.

patterns

• Type: string|string[]

options

• Type: Object

See options section for more detailed information.

fg.sync(patterns, [options])

Returns a Array of matching entries.

fg.stream(patterns, [options])

Returns a ReadableStream.

Options

cwd

• Type: string
• Default: process.cwd()

The current working directory in which to search.

deep

• Type: number|boolean
• Default: true

The deep option can be set to true to traverse the entire directory structure, or it can be set to a number to only traverse that many levels deep.

ignore

• Type: string[]
• Default: []

An array of glob patterns to exclude matches.

dot

• Type: boolean
• Default: false

Allow patterns to match filenames starting with a period (files & directories), even if the pattern does not explicitly have a period in that spot.

stats

• Type: number|boolean
• Default: false

Return fs.Stats with path property instead of file path.

onlyFiles

• Type: boolean
• Default: true

Return only files.

onlyDirectories

• Type: boolean
• Default: false

Return only directories.

transform

• Type: Function
• Default: null

Allows you to transform a path or fs.Stats object before sending to the array.

const fg = require('fast-glob');

const entries1 = fg.sync(['**/*.scss']);
const entries2 = fg.sync(['**/*.scss'], { transform: (entry) => '_' + entry });

console.log(entries1); // ['a.scss', 'b.scss']
console.log(entries2); // ['_a.scss', '_b.scss']

If you are using TypeScript, you probably want to specify your own type of the returned array.

import * as fg from 'fast-glob';

interface IEntry {
	path: string;
}

const entries: IEntry[] = fg.sync<IEntry>(['*.md'], {
	transform: (entry) => typeof entry === 'string' ? { path: entry } : { path: entry.path }
	// Will throw compilation error for non-IEntry types (boolean, for example)
});

How to exclude directory from reading?

You can use a negative pattern like this: !**/node_modules. Also you can use ignore option. Just look at the example below.

• first/
  • second/
    • file.md
  • file.md

If you don't want to read the second directory, you must write the following pattern: !**/second.

fg.sync(['**/*.md', '!**/second']); // ['first/file.txt']
fg.sync(['**/*.md'], { ignore: '**/second' }); // ['first/file.txt']

⚠️ When you write !**/second/** it means that the directory will be read, but all the entries will not be included in the results.

You have to understand that if you write the pattern to exclude directories, then the directory will not be read under any circumstances. But… you can specify a more meaningful pattern, which will be launched in parallel with the first.

fg.sync(['**/*.txt', '!**/second', 'first/second/**/*.txt']); // ['first/file.txt', 'first/second/file.txt']

However, be aware that it may not work as you expect in case where inside the second directory there is a directory matching to the pattern for exluding directory. Yes, sounds complicated. Simpler: the second directory inside the second directory.

Compatible with node-glob?

Not fully, because fast-glob not implements all options of node-glob. See table below.

Benchmarks

Tech specs:

• Processor: 2 ⅹ E5-2660 (32 core)
• RAM: 64GB
• Disk: RAMDisk

You can see results here for latest release.

Related

• readdir-enhanced – Fast functional replacement for fs.readdir().
• globby – User-friendly glob matching.
• node-glob – «Standard» glob functionality for Node.js
• bash-glob – Bash-powered globbing for node.js.
• glob-stream – A Readable Stream interface over node-glob that used in the gulpjs.

Changelog

See the Releases section of our GitHub project for changelogs for each release version.

License

This software is released under the terms of the MIT license.