micromatch

What is micromatch?

The micromatch npm package is a fast, minimal glob utility for node.js and JavaScript. It is used to parse, match, and expand glob patterns against strings to filter, validate, or manipulate file paths, names, and other string lists.

What are micromatch's main functionalities?

Matching glob patterns

Match an array of strings to a glob pattern. In this example, it filters the list to include only files ending with '.js'.

const micromatch = require('micromatch');
const result = micromatch(['foo.js', 'bar.js'], '*.js');
console.log(result); // ['foo.js', 'bar.js']

Negating glob patterns

Use negation patterns to exclude matches. This example matches all '.js' files but excludes 'foo.js'.

const micromatch = require('micromatch');
const result = micromatch(['foo.js', 'bar.js', 'baz.txt'], ['*.js', '!foo.js']);
console.log(result); // ['bar.js']

Testing a filepath

Test a single filepath against a glob pattern to see if it matches. In this case, 'foobar.js' is a match for '*.js'.

const micromatch = require('micromatch');
const isMatch = micromatch.isMatch('foobar.js', '*.js');
console.log(isMatch); // true

Expanding braces

Expand braces in glob patterns to match multiple patterns. This example matches 'foo.js' and 'foo1.js' with a single pattern.

const micromatch = require('micromatch');
const result = micromatch(['foo.js', 'foo1.js'], 'foo{,1}.js');
console.log(result); // ['foo.js', 'foo1.js']

Other packages similar to micromatch

minimatch

Minimatch is a minimal matching utility that works with glob patterns. It is the matcher used internally by npm (at least at the time of writing), but it is slower and less feature-rich compared to micromatch.

globby

Globby is a wrapper for fast-glob and supports multiple patterns. It provides a higher-level API for matching against file paths and is built on top of micromatch, offering additional features like file system operations.

fast-glob

Fast-glob is a fast implementation of glob functionality with a focus on performance. It provides a similar API to micromatch but includes additional features like returning file stats along with matched paths.

node-glob

Node-glob is an older glob implementation for Node.js. It is callback-based and not as performant or modern as micromatch, but it has been widely used in the Node.js ecosystem.

README

micromatch

Glob matching for javascript/node.js. A replacement and faster alternative to minimatch and multimatch.

Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your :heart: and support.

Table of Contents

Details

• Install
• Quickstart
• Why use micromatch?
  • Matching features
• Switching to micromatch
  • From minimatch
  • From multimatch
• API
• Options
• Options Examples
  • options.basename
  • options.bash
  • options.expandRange
  • options.format
  • options.ignore
  • options.matchBase
  • options.noextglob
  • options.nonegate
  • options.noglobstar
  • options.nonull
  • options.nullglob
  • options.onIgnore
  • options.onMatch
  • options.onResult
  • options.posixSlashes
  • options.unescape
• Extended globbing
  • Extglobs
  • Braces
  • Regex character classes
  • Regex groups
  • POSIX bracket expressions
• Notes
  • Bash 4.3 parity
  • Backslashes
• Benchmarks
  • Running benchmarks
  • Latest results
• Contributing
• About

Install

Install with npm:

$ npm install --save micromatch

Quickstart

const micromatch = require('micromatch');
// micromatch(list, patterns[, options]);

The main export takes a list of strings and one or more glob patterns:

console.log(micromatch(['foo', 'bar', 'baz', 'qux'], ['f*', 'b*'])) //=> ['foo', 'bar', 'baz']
console.log(micromatch(['foo', 'bar', 'baz', 'qux'], ['*', '!b*'])) //=> ['foo', 'qux']

Use .isMatch() to for boolean matching:

console.log(micromatch.isMatch('foo', 'f*')) //=> true
console.log(micromatch.isMatch('foo', ['b*', 'f*'])) //=> true

Switching from minimatch and multimatch is easy!

Why use micromatch?

micromatch is a replacement for minimatch and multimatch

• Supports all of the same matching features as minimatch and multimatch
• More complete support for the Bash 4.3 specification than minimatch and multimatch. Micromatch passes all of the spec tests from bash, including some that bash still fails.
• Fast & Performant - Loads in about 5ms and performs fast matches.
• Glob matching - Using wildcards (* and ?), globstars (**) for nested directories
• Advanced globbing - Supports extglobs, braces, and POSIX brackets, and support for escaping special characters with \ or quotes.
• Accurate - Covers more scenarios than minimatch
• Well tested - More than 5,000 test assertions
• Windows support - More reliable windows support than minimatch and multimatch.
• Safe - Micromatch is not subject to DoS with brace patterns like minimatch and multimatch.

Matching features

• Support for multiple glob patterns (no need for wrappers like multimatch)
• Wildcards (**, *.js)
• Negation ('!a/*.js', '*!(b).js'])
• extglobs (+(x|y), !(a|b))
• POSIX character classes ([[:alpha:][:digit:]])
• brace expansion (foo/{1..5}.md, bar/{a,b,c}.js)
• regex character classes (foo-[1-5].js)
• regex logical "or" (foo/(abc|xyz).js)

You can mix and match these features to create whatever patterns you need!

Switching to micromatch

(There is one notable difference between micromatch and minimatch in regards to how backslashes are handled. See the notes about backslashes for more information.)

From minimatch

Use micromatch.isMatch() instead of minimatch():

console.log(micromatch.isMatch('foo', 'b*')); //=> false

Use micromatch.match() instead of minimatch.match():

console.log(micromatch.match(['foo', 'bar'], 'b*')); //=> 'bar'

From multimatch

Same signature:

console.log(micromatch(['foo', 'bar', 'baz'], ['f*', '*z'])); //=> ['foo', 'baz']

API

Params

• {String|Array}: list List of strings to match.
• {String|Array}: patterns One or more glob patterns to use for matching.
• {Object}: options See available options
• returns {Array}: Returns an array of matches

Example

const mm = require('micromatch');
// mm(list, patterns[, options]);

console.log(mm(['a.js', 'a.txt'], ['*.js']));
//=> [ 'a.js' ]

.matcher

Returns a matcher function from the given glob pattern and options. The returned function takes a string to match as its only argument and returns true if the string is a match.

Params

• pattern {String}: Glob pattern
• options {Object}
• returns {Function}: Returns a matcher function.

Example

const mm = require('micromatch');
// mm.matcher(pattern[, options]);

const isMatch = mm.matcher('*.!(*a)');
console.log(isMatch('a.a')); //=> false
console.log(isMatch('a.b')); //=> true

.isMatch

Returns true if any of the given glob patterns match the specified string.

Params

• {String}: str The string to test.
• {String|Array}: patterns One or more glob patterns to use for matching.
• {Object}: See available options.
• returns {Boolean}: Returns true if any patterns match str

Example

const mm = require('micromatch');
// mm.isMatch(string, patterns[, options]);

console.log(mm.isMatch('a.a', ['b.*', '*.a'])); //=> true
console.log(mm.isMatch('a.a', 'b.*')); //=> false

.not

Returns a list of strings that do not match any of the given patterns.

Params

• list {Array}: Array of strings to match.
• patterns {String|Array}: One or more glob pattern to use for matching.
• options {Object}: See available options for changing how matches are performed
• returns {Array}: Returns an array of strings that do not match the given patterns.

Example

const mm = require('micromatch');
// mm.not(list, patterns[, options]);

console.log(mm.not(['a.a', 'b.b', 'c.c'], '*.a'));
//=> ['b.b', 'c.c']

.contains

Returns true if the given string contains the given pattern. Similar to .isMatch but the pattern can match any part of the string.

Params

• str {String}: The string to match.
• patterns {String|Array}: Glob pattern to use for matching.
• options {Object}: See available options for changing how matches are performed
• returns {Boolean}: Returns true if the patter matches any part of str.

Example

var mm = require('micromatch');
// mm.contains(string, pattern[, options]);

console.log(mm.contains('aa/bb/cc', '*b'));
//=> true
console.log(mm.contains('aa/bb/cc', '*d'));
//=> false

.matchKeys

Filter the keys of the given object with the given glob pattern and options. Does not attempt to match nested keys. If you need this feature, use glob-object instead.

Params

• object {Object}: The object with keys to filter.
• patterns {String|Array}: One or more glob patterns to use for matching.
• options {Object}: See available options for changing how matches are performed
• returns {Object}: Returns an object with only keys that match the given patterns.

Example

const mm = require('micromatch');
// mm.matchKeys(object, patterns[, options]);

const obj = { aa: 'a', ab: 'b', ac: 'c' };
console.log(mm.matchKeys(obj, '*b'));
//=> { ab: 'b' }

.some

Returns true if some of the strings in the given list match any of the given glob patterns.

Params

• list {String|Array}: The string or array of strings to test. Returns as soon as the first match is found.
• patterns {String|Array}: One or more glob patterns to use for matching.
• options {Object}: See available options for changing how matches are performed
• returns {Boolean}: Returns true if any patterns match str

Example

const mm = require('micromatch');
// mm.some(list, patterns[, options]);

console.log(mm.some(['foo.js', 'bar.js'], ['*.js', '!foo.js']));
// true
console.log(mm.some(['foo.js'], ['*.js', '!foo.js']));
// false

.every

Returns true if every string in the given list matches any of the given glob patterns.

Params

• list {String|Array}: The string or array of strings to test.
• patterns {String|Array}: One or more glob patterns to use for matching.
• options {Object}: See available options for changing how matches are performed
• returns {Boolean}: Returns true if any patterns match str

Example

const mm = require('micromatch');
// mm.every(list, patterns[, options]);

console.log(mm.every('foo.js', ['foo.js']));
// true
console.log(mm.every(['foo.js', 'bar.js'], ['*.js']));
// true
console.log(mm.every(['foo.js', 'bar.js'], ['*.js', '!foo.js']));
// false
console.log(mm.every(['foo.js'], ['*.js', '!foo.js']));
// false

.all

Returns true if all of the given patterns match the specified string.

Params

• str {String|Array}: The string to test.
• patterns {String|Array}: One or more glob patterns to use for matching.
• options {Object}: See available options for changing how matches are performed
• returns {Boolean}: Returns true if any patterns match str

Example

const mm = require('micromatch');
// mm.all(string, patterns[, options]);

console.log(mm.all('foo.js', ['foo.js']));
// true

console.log(mm.all('foo.js', ['*.js', '!foo.js']));
// false

console.log(mm.all('foo.js', ['*.js', 'foo.js']));
// true

console.log(mm.all('foo.js', ['*.js', 'f*', '*o*', '*o.js']));
// true

.capture

Returns an array of matches captured by pattern in string, ornull` if the pattern did not match.

Params

• glob {String}: Glob pattern to use for matching.
• input {String}: String to match
• options {Object}: See available options for changing how matches are performed
• returns {Boolean}: Returns an array of captures if the input matches the glob pattern, otherwise null.

Example

const mm = require('micromatch');
// mm.capture(pattern, string[, options]);

console.log(mm.capture('test/*.js', 'test/foo.js'));
//=> ['foo']
console.log(mm.capture('test/*.js', 'foo/bar.css'));
//=> null

.makeRe

Create a regular expression from the given glob pattern.

Params

• pattern {String}: A glob pattern to convert to regex.
• options {Object}
• returns {RegExp}: Returns a regex created from the given pattern.

Example

const mm = require('micromatch');
// mm.makeRe(pattern[, options]);

console.log(mm.makeRe('*.js'));
//=> /^(?:(\.[\\\/])?(?!\.)(?=.)[^\/]*?\.js)$/

.scan

Scan a glob pattern to separate the pattern into segments. Used by the split method.

Params

• pattern {String}
• options {Object}
• returns {Object}: Returns an object with

Example

const mm = require('micromatch');
const state = mm.scan(pattern[, options]);

.parse

Parse a glob pattern to create the source string for a regular expression.

Params

• glob {String}
• options {Object}
• returns {Object}: Returns an object with useful properties and output to be used as regex source string.

Example

const mm = require('micromatch');
const state = mm(pattern[, options]);

.braces

Process the given brace pattern.

Params

• pattern {String}: String with brace pattern to process.
• options {Object}: Any options to change how expansion is performed. See the braces library for all available options.
• returns {Array}

Example

const { braces } = require('micromatch');
console.log(braces('foo/{a,b,c}/bar'));
//=> [ 'foo/(a|b|c)/bar' ]

console.log(braces('foo/{a,b,c}/bar', { expand: true }));
//=> [ 'foo/a/bar', 'foo/b/bar', 'foo/c/bar' ]

Options

Option	Type	Default value	Description
basename	boolean	false	If set, then patterns without slashes will be matched against the basename of the path if it contains slashes. For example, a?b would match the path /xyz/123/acb, but not /xyz/acb/123.
bash	boolean	false	Follow bash matching rules more strictly - disallows backslashes as escape characters, and treats single stars as globstars (**).
capture	boolean	undefined	Return regex matches in supporting methods.
contains	boolean	undefined	Allows glob to match any part of the given string(s).
cwd	string	process.cwd()	Current working directory. Used by picomatch.split()
debug	boolean	undefined	Debug regular expressions when an error is thrown.
dot	boolean	false	Match dotfiles. Otherwise dotfiles are ignored unless a . is explicitly defined in the pattern.
expandRange	function	undefined	Custom function for expanding ranges in brace patterns, such as {a..z}. The function receives the range values as two arguments, and it must return a string to be used in the generated regex. It's recommended that returned strings be wrapped in parentheses. This option is overridden by the expandBrace option.
failglob	boolean	false	Similar to the failglob behavior in Bash, throws an error when no matches are found. Based on the bash option of the same name.
fastpaths	boolean	true	To speed up processing, full parsing is skipped for a handful common glob patterns. Disable this behavior by setting this option to false.
flags	boolean	undefined	Regex flags to use in the generated regex. If defined, the nocase option will be overridden.
format	function	undefined	Custom function for formatting the returned string. This is useful for removing leading slashes, converting Windows paths to Posix paths, etc.
ignore	array|string	undefined	One or more glob patterns for excluding strings that should not be matched from the result.
keepQuotes	boolean	false	Retain quotes in the generated regex, since quotes may also be used as an alternative to backslashes.
literalBrackets	boolean	undefined	When true, brackets in the glob pattern will be escaped so that only literal brackets will be matched.
lookbehinds	boolean	true	Support regex positive and negative lookbehinds. Note that you must be using Node 8.1.10 or higher to enable regex lookbehinds.
matchBase	boolean	false	Alias for basename
maxLength	boolean	65536	Limit the max length of the input string. An error is thrown if the input string is longer than this value.
nobrace	boolean	false	Disable brace matching, so that {a,b} and {1..3} would be treated as literal characters.
nobracket	boolean	undefined	Disable matching with regex brackets.
nocase	boolean	false	Perform case-insensitive matching. Equivalent to the regex i flag. Note that this option is ignored when the flags option is defined.
nodupes	boolean	true	Deprecated, use nounique instead. This option will be removed in a future major release. By default duplicates are removed. Disable uniquification by setting this option to false.
noext	boolean	false	Alias for noextglob
noextglob	boolean	false	Disable support for matching with extglobs (like +(a|b))
noglobstar	boolean	false	Disable support for matching nested directories with globstars (**)
nonegate	boolean	false	Disable support for negating with leading !
noquantifiers	boolean	false	Disable support for regex quantifiers (like a{1,2}) and treat them as brace patterns to be expanded.
onIgnore	function	undefined	Function to be called on ignored items.
onMatch	function	undefined	Function to be called on matched items.
onResult	function	undefined	Function to be called on all items, regardless of whether or not they are matched or ignored.
posix	boolean	false	Support POSIX character classes ("posix brackets").
posixSlashes	boolean	undefined	Convert all slashes in file paths to forward slashes. This does not convert slashes in the glob pattern itself
prepend	boolean	undefined	String to prepend to the generated regex used for matching.
regex	boolean	false	Use regular expression rules for + (instead of matching literal +), and for stars that follow closing parentheses or brackets (as in )* and ]*).
strictBrackets	boolean	undefined	Throw an error if brackets, braces, or parens are imbalanced.
strictSlashes	boolean	undefined	When true, picomatch won't match trailing slashes with single stars.
unescape	boolean	undefined	Remove preceding backslashes from escaped glob characters before creating the regular expression to perform matches.
unixify	boolean	undefined	Alias for posixSlashes, for backwards compatitibility.

Options Examples

options.basename

Allow glob patterns without slashes to match a file path based on its basename. Same behavior as minimatch option matchBase.

Type: Boolean

Default: false

Example

micromatch(['a/b.js', 'a/c.md'], '*.js');
//=> []

micromatch(['a/b.js', 'a/c.md'], '*.js', { basename: true });
//=> ['a/b.js']

options.bash

Enabled by default, this option enforces bash-like behavior with stars immediately following a bracket expression. Bash bracket expressions are similar to regex character classes, but unlike regex, a star following a bracket expression does not repeat the bracketed characters. Instead, the star is treated the same as any other star.

Type: Boolean

Default: true

Example

const files = ['abc', 'ajz'];
console.log(micromatch(files, '[a-c]*'));
//=> ['abc', 'ajz']

console.log(micromatch(files, '[a-c]*', { bash: false }));

options.expandRange

Type: function

Default: undefined

Custom function for expanding ranges in brace patterns. The fill-range library is ideal for this purpose, or you can use custom code to do whatever you need.

Example

The following example shows how to create a glob that matches a numeric folder name between 01 and 25, with leading zeros.

const fill = require('fill-range');
const regex = micromatch.makeRe('foo/{01..25}/bar', {
  expandRange(a, b) {
    return `(${fill(a, b, { toRegex: true })})`;
  }
});

console.log(regex)
//=> /^(?:foo\/((?:0[1-9]|1[0-9]|2[0-5]))\/bar)$/

console.log(regex.test('foo/00/bar')) // false
console.log(regex.test('foo/01/bar')) // true
console.log(regex.test('foo/10/bar')) // true
console.log(regex.test('foo/22/bar')) // true
console.log(regex.test('foo/25/bar')) // true
console.log(regex.test('foo/26/bar')) // false

options.format

Type: function

Default: undefined

Custom function for formatting strings before they're matched.

Example

// strip leading './' from strings
const format = str => str.replace(/^\.\//, '');
const isMatch = picomatch('foo/*.js', { format });
console.log(isMatch('./foo/bar.js')) //=> true

options.ignore

String or array of glob patterns to match files to ignore.

Type: String|Array

Default: undefined

const isMatch = micromatch.matcher('*', { ignore: 'f*' });
console.log(isMatch('foo')) //=> false
console.log(isMatch('bar')) //=> true
console.log(isMatch('baz')) //=> true

options.matchBase

Alias for options.basename.

options.noextglob

Disable extglob support, so that extglobs are regarded as literal characters.

Type: Boolean

Default: undefined

Examples

console.log(micromatch(['a/z', 'a/b', 'a/!(z)'], 'a/!(z)'));
//=> ['a/b', 'a/!(z)']

console.log(micromatch(['a/z', 'a/b', 'a/!(z)'], 'a/!(z)', { noextglob: true }));
//=> ['a/!(z)'] (matches only as literal characters)

options.nonegate

Disallow negation (!) patterns, and treat leading ! as a literal character to match.

Type: Boolean

Default: undefined

options.noglobstar

Disable matching with globstars (**).

Type: Boolean

Default: undefined

micromatch(['a/b', 'a/b/c', 'a/b/c/d'], 'a/**');
//=> ['a/b', 'a/b/c', 'a/b/c/d']

micromatch(['a/b', 'a/b/c', 'a/b/c/d'], 'a/**', {noglobstar: true});
//=> ['a/b']

options.nonull

Alias for options.nullglob.

options.nullglob

If true, when no matches are found the actual (arrayified) glob pattern is returned instead of an empty array. Same behavior as minimatch option nonull.

Type: Boolean

Default: undefined

options.onIgnore

const onIgnore = ({ glob, regex, input, output }) => {
  console.log({ glob, regex, input, output });
  // { glob: '*', regex: /^(?:(?!\.)(?=.)[^\/]*?\/?)$/, input: 'foo', output: 'foo' }
};

const isMatch = micromatch.matcher('*', { onIgnore, ignore: 'f*' });
isMatch('foo');
isMatch('bar');
isMatch('baz');

options.onMatch

const onMatch = ({ glob, regex, input, output }) => {
  console.log({ input, output });
  // { input: 'some\\path', output: 'some/path' }
  // { input: 'some\\path', output: 'some/path' }
  // { input: 'some\\path', output: 'some/path' }
};

const isMatch = micromatch.matcher('**', { onMatch, posixSlashes: true });
isMatch('some\\path');
isMatch('some\\path');
isMatch('some\\path');

options.onResult

const onResult = ({ glob, regex, input, output }) => {
  console.log({ glob, regex, input, output });
};

const isMatch = micromatch('*', { onResult, ignore: 'f*' });
isMatch('foo');
isMatch('bar');
isMatch('baz');

options.posixSlashes

Convert path separators on returned files to posix/unix-style forward slashes. Aliased as unixify for backwards compatibility.

Type: Boolean

Default: true on windows, false everywhere else.

Example

console.log(micromatch.match(['a\\b\\c'], 'a/**'));
//=> ['a/b/c']

console.log(micromatch.match(['a\\b\\c'], { posixSlashes: false }));
//=> ['a\\b\\c']

options.unescape

Remove backslashes from escaped glob characters before creating the regular expression to perform matches.

Type: Boolean

Default: undefined

Example

In this example we want to match a literal *:

console.log(micromatch.match(['abc', 'a\\*c'], 'a\\*c'));
//=> ['a\\*c']

console.log(micromatch.match(['abc', 'a\\*c'], 'a\\*c', { unescape: true }));
//=> ['a*c']

Extended globbing

Micromatch supports the following extended globbing features.

Extglobs

Extended globbing, as described by the bash man page:

pattern	regex equivalent	description
?(pattern)	(pattern)?	Matches zero or one occurrence of the given patterns
*(pattern)	(pattern)*	Matches zero or more occurrences of the given patterns
+(pattern)	(pattern)+	Matches one or more occurrences of the given patterns
@(pattern)	(pattern) *	Matches one of the given patterns
!(pattern)	N/A (equivalent regex is much more complicated)	Matches anything except one of the given patterns

^* Note that @ isn't a regex character.

Braces

Brace patterns can be used to match specific ranges or sets of characters.

Example

The pattern {f,b}*/{1..3}/{b,q}* would match any of following strings:

foo/1/bar
foo/2/bar
foo/3/bar
baz/1/qux
baz/2/qux
baz/3/qux

Visit braces to see the full range of features and options related to brace expansion, or to create brace matching or expansion related issues.

Regex character classes

Given the list: ['a.js', 'b.js', 'c.js', 'd.js', 'E.js']:

• [ac].js: matches both a and c, returning ['a.js', 'c.js']
• [b-d].js: matches from b to d, returning ['b.js', 'c.js', 'd.js']
• [b-d].js: matches from b to d, returning ['b.js', 'c.js', 'd.js']
• a/[A-Z].js: matches and uppercase letter, returning ['a/E.md']

Learn about regex character classes.

Regex groups

Given ['a.js', 'b.js', 'c.js', 'd.js', 'E.js']:

• (a|c).js: would match either a or c, returning ['a.js', 'c.js']
• (b|d).js: would match either b or d, returning ['b.js', 'd.js']
• (b|[A-Z]).js: would match either b or an uppercase letter, returning ['b.js', 'E.js']

As with regex, parens can be nested, so patterns like ((a|b)|c)/b will work. Although brace expansion might be friendlier to use, depending on preference.

POSIX bracket expressions

POSIX brackets are intended to be more user-friendly than regex character classes. This of course is in the eye of the beholder.

Example

console.log(micromatch.isMatch('a1', '[[:alpha:][:digit:]]')) //=> true
console.log(micromatch.isMatch('a1', '[[:alpha:][:alpha:]]')) //=> false

---

Notes

Bash 4.3 parity

Whenever possible matching behavior is based on behavior Bash 4.3, which is mostly consistent with minimatch.

However, it's suprising how many edge cases and rabbit holes there are with glob matching, and since there is no real glob specification, and micromatch is more accurate than both Bash and minimatch, there are cases where best-guesses were made for behavior. In a few cases where Bash had no answers, we used wildmatch (used by git) as a fallback.

Backslashes

There is an important, notable difference between minimatch and micromatch in regards to how backslashes are handled in glob patterns.

• Micromatch exclusively and explicitly reserves backslashes for escaping characters in a glob pattern, even on windows, which is consistent with bash behavior. More importantly, unescaping globs can result in unsafe regular expressions.
• Minimatch converts all backslashes to forward slashes, which means you can't use backslashes to escape any characters in your glob patterns.

We made this decision for micromatch for a couple of reasons:

• Consistency with bash conventions.
• Glob patterns are not filepaths. They are a type of regular language that is converted to a JavaScript regular expression. Thus, when forward slashes are defined in a glob pattern, the resulting regular expression will match windows or POSIX path separators just fine.

A note about joining paths to globs

Note that when you pass something like path.join('foo', '*') to micromatch, you are creating a filepath and expecting it to still work as a glob pattern. This causes problems on windows, since the path.sep is \\.

In other words, since \\ is reserved as an escape character in globs, on windows path.join('foo', '*') would result in foo\\*, which tells micromatch to match * as a literal character. This is the same behavior as bash.

To solve this, you might be inspired to do something like 'foo\\*'.replace(/\\/g, '/'), but this causes another, potentially much more serious, problem.

Benchmarks

Running benchmarks

Install dependencies for running benchmarks:

$ cd bench && npm install 

Run the benchmarks:

$ npm run bench

Latest results

As of April 10, 2019 (longer bars are better):

# .makeRe star
  micromatch x 1,724,735 ops/sec ±1.69% (87 runs sampled))
  minimatch x 649,565 ops/sec ±1.93% (91 runs sampled)

# .makeRe star; dot=true
  micromatch x 1,302,127 ops/sec ±1.43% (92 runs sampled)
  minimatch x 556,242 ops/sec ±0.71% (86 runs sampled)

# .makeRe globstar
  micromatch x 1,393,992 ops/sec ±0.71% (89 runs sampled)
  minimatch x 1,112,801 ops/sec ±2.02% (91 runs sampled)

# .makeRe globstars
  micromatch x 1,419,097 ops/sec ±0.34% (94 runs sampled)
  minimatch x 541,207 ops/sec ±1.66% (93 runs sampled)

# .makeRe with leading star
  micromatch x 1,247,825 ops/sec ±0.97% (94 runs sampled)
  minimatch x 489,660 ops/sec ±0.63% (94 runs sampled)

# .makeRe - braces
  micromatch x 206,301 ops/sec ±1.62% (81 runs sampled))
  minimatch x 115,986 ops/sec ±0.59% (94 runs sampled)

# .makeRe braces - range (expanded)
  micromatch x 27,782 ops/sec ±0.79% (88 runs sampled)
  minimatch x 4,683 ops/sec ±1.20% (92 runs sampled)

# .makeRe braces - range (compiled)
  micromatch x 134,056 ops/sec ±2.73% (77 runs sampled))
  minimatch x 977 ops/sec ±0.85% (91 runs sampled)d)

# .makeRe braces - nested ranges (expanded)
  micromatch x 18,353 ops/sec ±0.95% (91 runs sampled)
  minimatch x 4,514 ops/sec ±1.04% (93 runs sampled)

# .makeRe braces - nested ranges (compiled)
  micromatch x 38,916 ops/sec ±1.85% (82 runs sampled)
  minimatch x 980 ops/sec ±0.54% (93 runs sampled)d)

# .makeRe braces - set (compiled)
  micromatch x 141,088 ops/sec ±1.70% (70 runs sampled))
  minimatch x 43,385 ops/sec ±0.87% (93 runs sampled)

# .makeRe braces - nested sets (compiled)
  micromatch x 87,272 ops/sec ±2.85% (71 runs sampled))
  minimatch x 25,327 ops/sec ±1.59% (86 runs sampled)

Contributing

All contributions are welcome! Please read the contributing guide to get started.

Bug reports

Please create an issue if you encounter a bug or matching behavior that doesn't seem correct. If you find a matching-related issue, please:

• research existing issues first (open and closed)
• visit the GNU Bash documentation to see how Bash deals with the pattern
• visit the minimatch documentation to cross-check expected behavior in node.js
• if all else fails, since there is no real specification for globs we will probably need to discuss expected behavior and decide how to resolve it. which means any detail you can provide to help with this discussion would be greatly appreciated.

Platform issues

It's important to us that micromatch work consistently on all platforms. If you encounter any platform-specific matching or path related issues, please let us know (pull requests are also greatly appreciated).

About

Contributing

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

Please read the contributing guide for advice on opening issues, pull requests, and coding standards.

Running Tests

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

Building docs

(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

Related projects

You might also be interested in these projects:

• braces: Bash-like brace expansion, implemented in JavaScript. Safer than other brace expansion libs, with complete support… more | homepage
• expand-brackets: Expand POSIX bracket expressions (character classes) in glob patterns. | homepage
• extglob: Extended glob support for JavaScript. Adds (almost) the expressive power of regular expressions to glob… more | homepage
• fill-range: Fill in a range of numbers or letters, optionally passing an increment or step to… more | homepage
• nanomatch: Fast, minimal glob matcher for node.js. Similar to micromatch, minimatch and multimatch, but complete Bash… more | homepage

Contributors

Commits	Contributor
475	jonschlinkert
12	es128
8	doowb
3	paulmillr
2	TrySound
2	MartinKolarik
2	Tvrqvoise
2	tunnckoCore
1	amilajack
1	mrmlnc
1	devongovett
1	DianeLooney
1	UltCombo
1	tomByrer
1	fidian
1	simlu
1	wtgtybhertgeghgtwtg

Author

Jon Schlinkert

• GitHub Profile
• Twitter Profile
• LinkedIn Profile

License

Copyright © 2019, Jon Schlinkert. Released under the MIT License.

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This file was generated by verb-generate-readme, v0.8.0, on April 10, 2019.