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217 lines
6.4 KiB
Markdown
217 lines
6.4 KiB
Markdown
# minimatch
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A minimal matching utility.
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[](http://travis-ci.org/isaacs/minimatch)
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This is the matching library used internally by npm.
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It works by converting glob expressions into JavaScript `RegExp`
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objects.
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## Usage
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```javascript
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var minimatch = require("minimatch")
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minimatch("bar.foo", "*.foo") // true!
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minimatch("bar.foo", "*.bar") // false!
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minimatch("bar.foo", "*.+(bar|foo)", { debug: true }) // true, and noisy!
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```
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## Features
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Supports these glob features:
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* Brace Expansion
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* Extended glob matching
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* "Globstar" `**` matching
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See:
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* `man sh`
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* `man bash`
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* `man 3 fnmatch`
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* `man 5 gitignore`
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## Minimatch Class
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Create a minimatch object by instanting the `minimatch.Minimatch` class.
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```javascript
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var Minimatch = require("minimatch").Minimatch
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var mm = new Minimatch(pattern, options)
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```
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### Properties
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* `pattern` The original pattern the minimatch object represents.
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* `options` The options supplied to the constructor.
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* `set` A 2-dimensional array of regexp or string expressions.
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Each row in the
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array corresponds to a brace-expanded pattern. Each item in the row
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corresponds to a single path-part. For example, the pattern
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`{a,b/c}/d` would expand to a set of patterns like:
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[ [ a, d ]
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, [ b, c, d ] ]
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If a portion of the pattern doesn't have any "magic" in it
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(that is, it's something like `"foo"` rather than `fo*o?`), then it
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will be left as a string rather than converted to a regular
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expression.
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* `regexp` Created by the `makeRe` method. A single regular expression
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expressing the entire pattern. This is useful in cases where you wish
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to use the pattern somewhat like `fnmatch(3)` with `FNM_PATH` enabled.
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* `negate` True if the pattern is negated.
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* `comment` True if the pattern is a comment.
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* `empty` True if the pattern is `""`.
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### Methods
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* `makeRe` Generate the `regexp` member if necessary, and return it.
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Will return `false` if the pattern is invalid.
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* `match(fname)` Return true if the filename matches the pattern, or
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false otherwise.
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* `matchOne(fileArray, patternArray, partial)` Take a `/`-split
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filename, and match it against a single row in the `regExpSet`. This
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method is mainly for internal use, but is exposed so that it can be
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used by a glob-walker that needs to avoid excessive filesystem calls.
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All other methods are internal, and will be called as necessary.
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## Functions
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The top-level exported function has a `cache` property, which is an LRU
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cache set to store 100 items. So, calling these methods repeatedly
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with the same pattern and options will use the same Minimatch object,
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saving the cost of parsing it multiple times.
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### minimatch(path, pattern, options)
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Main export. Tests a path against the pattern using the options.
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```javascript
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var isJS = minimatch(file, "*.js", { matchBase: true })
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```
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### minimatch.filter(pattern, options)
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Returns a function that tests its
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supplied argument, suitable for use with `Array.filter`. Example:
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```javascript
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var javascripts = fileList.filter(minimatch.filter("*.js", {matchBase: true}))
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```
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### minimatch.match(list, pattern, options)
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Match against the list of
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files, in the style of fnmatch or glob. If nothing is matched, and
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options.nonull is set, then return a list containing the pattern itself.
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```javascript
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var javascripts = minimatch.match(fileList, "*.js", {matchBase: true}))
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```
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### minimatch.makeRe(pattern, options)
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Make a regular expression object from the pattern.
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## Options
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All options are `false` by default.
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### debug
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Dump a ton of stuff to stderr.
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### nobrace
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Do not expand `{a,b}` and `{1..3}` brace sets.
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### noglobstar
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Disable `**` matching against multiple folder names.
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### dot
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Allow patterns to match filenames starting with a period, even if
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the pattern does not explicitly have a period in that spot.
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Note that by default, `a/**/b` will **not** match `a/.d/b`, unless `dot`
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is set.
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### noext
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Disable "extglob" style patterns like `+(a|b)`.
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### nocase
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Perform a case-insensitive match.
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### nonull
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When a match is not found by `minimatch.match`, return a list containing
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the pattern itself if this option is set. When not set, an empty list
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is returned if there are no matches.
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### matchBase
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If set, then patterns without slashes will be matched
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against the basename of the path if it contains slashes. For example,
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`a?b` would match the path `/xyz/123/acb`, but not `/xyz/acb/123`.
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### nocomment
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Suppress the behavior of treating `#` at the start of a pattern as a
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comment.
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### nonegate
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Suppress the behavior of treating a leading `!` character as negation.
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### flipNegate
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Returns from negate expressions the same as if they were not negated.
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(Ie, true on a hit, false on a miss.)
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## Comparisons to other fnmatch/glob implementations
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While strict compliance with the existing standards is a worthwhile
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goal, some discrepancies exist between minimatch and other
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implementations, and are intentional.
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If the pattern starts with a `!` character, then it is negated. Set the
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`nonegate` flag to suppress this behavior, and treat leading `!`
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characters normally. This is perhaps relevant if you wish to start the
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pattern with a negative extglob pattern like `!(a|B)`. Multiple `!`
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characters at the start of a pattern will negate the pattern multiple
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times.
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If a pattern starts with `#`, then it is treated as a comment, and
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will not match anything. Use `\#` to match a literal `#` at the
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start of a line, or set the `nocomment` flag to suppress this behavior.
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The double-star character `**` is supported by default, unless the
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`noglobstar` flag is set. This is supported in the manner of bsdglob
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and bash 4.1, where `**` only has special significance if it is the only
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thing in a path part. That is, `a/**/b` will match `a/x/y/b`, but
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`a/**b` will not.
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If an escaped pattern has no matches, and the `nonull` flag is set,
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then minimatch.match returns the pattern as-provided, rather than
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interpreting the character escapes. For example,
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`minimatch.match([], "\\*a\\?")` will return `"\\*a\\?"` rather than
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`"*a?"`. This is akin to setting the `nullglob` option in bash, except
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that it does not resolve escaped pattern characters.
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If brace expansion is not disabled, then it is performed before any
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other interpretation of the glob pattern. Thus, a pattern like
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`+(a|{b),c)}`, which would not be valid in bash or zsh, is expanded
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**first** into the set of `+(a|b)` and `+(a|c)`, and those patterns are
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checked for validity. Since those two are valid, matching proceeds.
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