***Fast**-Loadsinabout2ms(that'sseveraltimesfasterthana[singleframeofaHDmovie](http://www.endmemo.com/sconvert/framespersecondframespermillisecond.php) at 60fps)
***Accuratematching**-Usingwildcards(`*` and `?`), globstars (`**`) for nested directories, [advanced globbing](#advanced-globbing) with extglobs, braces, and POSIX brackets, and support for escaping special characters with `\`orquotes.
Compile a regular expression from the `state` object returned by the
[parse()](#parse) method.
**Params**
* `state` **{Object}**
* `options` **{Object}**
* `returnOutput` **{Boolean}**: Intended for implementors, this argument allows you to return the raw output from the parser.
* `returnState` **{Boolean}**: Adds the state to a `state` property on the returned regex. Useful for implementors and debugging.
* `returns` **{RegExp}**
### [.makeRe](lib/picomatch.js#L286)
Create a regular expression from a parsed glob pattern.
**Params**
* `state` **{String}**: The object returned from the `.parse` method.
* `options` **{Object}**
* `returnOutput` **{Boolean}**: Implementors may use this argument to return the compiled output, instead of a regular expression. This is not exposed on the options to prevent end-users from mutating the result.
* `returnState` **{Boolean}**: Implementors may use this argument to return the state from the parsed glob with the returned regular expression.
* `returns` **{RegExp}**: Returns a regex created from the given pattern.
**Example**
```js
const picomatch = require('picomatch');
const state = picomatch.parse('*.js');
// picomatch.compileRe(state[, options]);
console.log(picomatch.compileRe(state));
//=> /^(?:(?!\.)(?=.)[^/]*?\.js)$/
```
### [.toRegex](lib/picomatch.js#L321)
Create a regular expression from the given regex source string.
| `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 (`**`). |
| `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` | Enable dotfile matching. By default, dotfiles are ignored unless a `.` is explicitly defined in the pattern, or `options.dot` is true |
| `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. |
| `failglob` | `boolean` | `false` | Throws an error if 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` | `string` | `undefined` | Regex flags to use in the generated regex. If defined, the `nocase` option will be overridden. |
| [format](#optionsformat) | `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. |
| `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. |
| `nocase` | `boolean` | `false` | Make matching case-insensitive. Equivalent to the regex `i` flag. Note that this option is overridden by the `flags` option. |
| `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](#optionsonIgnore) | `function` | `undefined` | Function to be called on ignored items. |
| [onMatch](#optionsonMatch) | `function` | `undefined` | Function to be called on matched items. |
| [onResult](#optionsonResult) | `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 backslashes preceding escaped characters in the glob pattern. By default, backslashes are retained. |
| `unixify` | `boolean` | `undefined` | Alias for `posixSlashes`, for backwards compatibility. |
picomatch has automatic detection for regex positive and negative lookbehinds. If the pattern contains a negative lookbehind, you must be using Node.js >= 8.10 or else picomatch will throw an error.
### Scan Options
In addition to the main [picomatch options](#picomatch-options), the following options may also be used with the [.scan](#scan) method.
| `tokens` | `boolean` | `false` | When `true`, the returned object will include an array of tokens (objects), representing each path "segment" in the scanned glob pattern |
| `parts` | `boolean` | `false` | When `true`, the returned object will include an array of strings representing each path "segment" in the scanned glob pattern. This is automatically enabled when `options.tokens` is true |
**Example**
```js
const picomatch = require('picomatch');
const result = picomatch.scan('!./foo/*.js', { tokens: true });
Custom function for expanding ranges in brace patterns. The [fill-range](https://github.com/jonschlinkert/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 folder
```js
const fill = require('fill-range');
const regex = pm.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**
```js
// strip leading './' from strings
const format = str => str.replace(/^\.\//, '');
const isMatch = picomatch('foo/*.js', { format });
| `*` | Matches any character zero or more times, excluding path separators. Does _not match_ path separators or hidden files or directories ("dotfiles"), unless explicitly enabled by setting the `dot` option to `true`. |
| `**` | Matches any character zero or more times, including path separators. Note that `**` will only match path separators (`/`, and `\\` on Windows) when they are the only characters in a path segment. Thus, `foo**/bar` is equivalent to `foo*/bar`, and `foo/a**b/bar` is equivalent to `foo/a*b/bar`, and _more than two_ consecutive stars in a glob path segment are regarded as _a single star_. Thus, `foo/***/bar` is equivalent to `foo/*/bar`.|
*Bashwillmatch`foo/bar/baz` with `*`. Picomatch only matches nested directories with `**`.
*Bashgreedilymatcheswithnegatedextglobs.Forexample,Bash4.3saysthat`!(foo)*` should match `foo` and `foobar`, since the trailing `*` bracktracks to match the preceding pattern. This is very memory-inefficient, and IMHO, also incorrect. Picomatch would return `false` for both `foo` and `foobar`.
<br>
###Advancedglobbing
*[extglobs](#extglobs)
*[POSIXbrackets](#posix-brackets)
*[Braces](#brace-expansion)
####Extglobs
|**Pattern**|**Description**|
|---|---|
|`@(pattern)` | Match _only one_ consecutive occurrence of `pattern`|
|`*(pattern)` | Match _zero or more_ consecutive occurrences of `pattern`|
|`+(pattern)` | Match _one or more_ consecutive occurrences of `pattern`|
|`?(pattern)` | Match _zero or **one**_ consecutive occurrences of `pattern`|
*`[:alpha:]` - Alphabetical characters, equivalent to `[a-zA-Z]`.
*`[:ascii:]` - ASCII characters, equivalent to `[\\x00-\\x7F]`.
*`[:blank:]` - Space and tab characters, equivalent to `[ \\t]`.
*`[:cntrl:]` - Control characters, equivalent to `[\\x00-\\x1F\\x7F]`.
*`[:digit:]` - Numerical digits, equivalent to `[0-9]`.
*`[:graph:]` - Graph characters, equivalent to `[\\x21-\\x7E]`.
*`[:lower:]` - Lowercase letters, equivalent to `[a-z]`.
*`[:print:]` - Print characters, equivalent to `[\\x20-\\x7E ]`.
*`[:punct:]` - Punctuation and symbols, equivalent to `[\\-!"#$%&\'()\\*+,./:;<=>?@[\\]^_`{|}~]`.
*`[:space:]` - Extended space characters, equivalent to `[ \\t\\r\\n\\v\\f]`.
*`[:upper:]` - Uppercase letters, equivalent to `[A-Z]`.
*`[:word:]` - Word characters (letters, numbers and underscores), equivalent to `[A-Za-z0-9_]`.
*`[:xdigit:]` - Hexadecimal digits, equivalent to `[A-Fa-f0-9]`.
Seethe[BashReferenceManual](https://www.gnu.org/software/bash/manual/html_node/Pattern-Matching.html) for more information.
###Braces
Picomatchdoesnotdobraceexpansion.For[braceexpansion](https://www.gnu.org/software/bash/manual/html_node/Brace-Expansion.html) and advanced matching with braces, use [micromatch](https://github.com/micromatch/micromatch) instead. Picomatch has very basic support for braces.
_(Thisproject'sreadme.mdisgeneratedby[verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_