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picomatch.js
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Sun, Jul 20, 16:33

picomatch.js
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'use strict';
const path = require('path');
const scan = require('./scan');
const parse = require('./parse');
const utils = require('./utils');
const constants = require('./constants');
const isObject = val => val && typeof val === 'object' && !Array.isArray(val);
/**
* Creates a matcher function from one or more glob patterns. The
* returned function takes a string to match as its first argument,
* and returns true if the string is a match. The returned matcher
* function also takes a boolean as the second argument that, when true,
* returns an object with additional information.
*
* ```js
* const picomatch = require('picomatch');
* // picomatch(glob[, options]);
*
* const isMatch = picomatch('*.!(*a)');
* console.log(isMatch('a.a')); //=> false
* console.log(isMatch('a.b')); //=> true
* ```
* @name picomatch
* @param {String|Array} `globs` One or more glob patterns.
* @param {Object=} `options`
* @return {Function=} Returns a matcher function.
* @api public
*/
const picomatch = (glob, options, returnState = false) => {
if (Array.isArray(glob)) {
const fns = glob.map(input => picomatch(input, options, returnState));
const arrayMatcher = str => {
for (const isMatch of fns) {
const state = isMatch(str);
if (state) return state;
}
return false;
};
return arrayMatcher;
}
const isState = isObject(glob) && glob.tokens && glob.input;
if (glob === '' || (typeof glob !== 'string' && !isState)) {
throw new TypeError('Expected pattern to be a non-empty string');
}
const opts = options || {};
const posix = utils.isWindows(options);
const regex = isState
? picomatch.compileRe(glob, options)
: picomatch.makeRe(glob, options, false, true);
const state = regex.state;
delete regex.state;
let isIgnored = () => false;
if (opts.ignore) {
const ignoreOpts = { ...options, ignore: null, onMatch: null, onResult: null };
isIgnored = picomatch(opts.ignore, ignoreOpts, returnState);
}
const matcher = (input, returnObject = false) => {
const { isMatch, match, output } = picomatch.test(input, regex, options, { glob, posix });
const result = { glob, state, regex, posix, input, output, match, isMatch };
if (typeof opts.onResult === 'function') {
opts.onResult(result);
}
if (isMatch === false) {
result.isMatch = false;
return returnObject ? result : false;
}
if (isIgnored(input)) {
if (typeof opts.onIgnore === 'function') {
opts.onIgnore(result);
}
result.isMatch = false;
return returnObject ? result : false;
}
if (typeof opts.onMatch === 'function') {
opts.onMatch(result);
}
return returnObject ? result : true;
};
if (returnState) {
matcher.state = state;
}
return matcher;
};
/**
* Test `input` with the given `regex`. This is used by the main
* `picomatch()` function to test the input string.
*
* ```js
* const picomatch = require('picomatch');
* // picomatch.test(input, regex[, options]);
*
* console.log(picomatch.test('foo/bar', /^(?:([^/]*?)\/([^/]*?))$/));
* // { isMatch: true, match: [ 'foo/', 'foo', 'bar' ], output: 'foo/bar' }
* ```
* @param {String} `input` String to test.
* @param {RegExp} `regex`
* @return {Object} Returns an object with matching info.
* @api public
*/
picomatch.test = (input, regex, options, { glob, posix } = {}) => {
if (typeof input !== 'string') {
throw new TypeError('Expected input to be a string');
}
if (input === '') {
return { isMatch: false, output: '' };
}
const opts = options || {};
const format = opts.format || (posix ? utils.toPosixSlashes : null);
let match = input === glob;
let output = (match && format) ? format(input) : input;
if (match === false) {
output = format ? format(input) : input;
match = output === glob;
}
if (match === false || opts.capture === true) {
if (opts.matchBase === true || opts.basename === true) {
match = picomatch.matchBase(input, regex, options, posix);
} else {
match = regex.exec(output);
}
}
return { isMatch: Boolean(match), match, output };
};
/**
* Match the basename of a filepath.
*
* ```js
* const picomatch = require('picomatch');
* // picomatch.matchBase(input, glob[, options]);
* console.log(picomatch.matchBase('foo/bar.js', '*.js'); // true
* ```
* @param {String} `input` String to test.
* @param {RegExp|String} `glob` Glob pattern or regex created by [.makeRe](#makeRe).
* @return {Boolean}
* @api public
*/
picomatch.matchBase = (input, glob, options, posix = utils.isWindows(options)) => {
const regex = glob instanceof RegExp ? glob : picomatch.makeRe(glob, options);
return regex.test(path.basename(input));
};
/**
* Returns true if **any** of the given glob `patterns` match the specified `string`.
*
* ```js
* const picomatch = require('picomatch');
* // picomatch.isMatch(string, patterns[, options]);
*
* console.log(picomatch.isMatch('a.a', ['b.*', '*.a'])); //=> true
* console.log(picomatch.isMatch('a.a', 'b.*')); //=> false
* ```
* @param {String|Array} str The string to test.
* @param {String|Array} patterns One or more glob patterns to use for matching.
* @param {Object} [options] See available [options](#options).
* @return {Boolean} Returns true if any patterns match `str`
* @api public
*/
picomatch.isMatch = (str, patterns, options) => picomatch(patterns, options)(str);
/**
* Parse a glob pattern to create the source string for a regular
* expression.
*
* ```js
* const picomatch = require('picomatch');
* const result = picomatch.parse(pattern[, options]);
* ```
* @param {String} `pattern`
* @param {Object} `options`
* @return {Object} Returns an object with useful properties and output to be used as a regex source string.
* @api public
*/
picomatch.parse = (pattern, options) => {
if (Array.isArray(pattern)) return pattern.map(p => picomatch.parse(p, options));
return parse(pattern, { ...options, fastpaths: false });
};
/**
* Scan a glob pattern to separate the pattern into segments.
*
* ```js
* const picomatch = require('picomatch');
* // picomatch.scan(input[, options]);
*
* const result = picomatch.scan('!./foo/*.js');
* console.log(result);
* { prefix: '!./',
* input: '!./foo/*.js',
* start: 3,
* base: 'foo',
* glob: '*.js',
* isBrace: false,
* isBracket: false,
* isGlob: true,
* isExtglob: false,
* isGlobstar: false,
* negated: true }
* ```
* @param {String} `input` Glob pattern to scan.
* @param {Object} `options`
* @return {Object} Returns an object with
* @api public
*/
picomatch.scan = (input, options) => scan(input, options);
/**
* Compile a regular expression from the `state` object returned by the
* [parse()](#parse) method.
*
* @param {Object} `state`
* @param {Object} `options`
* @param {Boolean} `returnOutput` Intended for implementors, this argument allows you to return the raw output from the parser.
* @param {Boolean} `returnState` Adds the state to a `state` property on the returned regex. Useful for implementors and debugging.
* @return {RegExp}
* @api public
*/
picomatch.compileRe = (state, options, returnOutput = false, returnState = false) => {
if (returnOutput === true) {
return state.output;
}
const opts = options || {};
const prepend = opts.contains ? '' : '^';
const append = opts.contains ? '' : '$';
let source = `${prepend}(?:${state.output})${append}`;
if (state && state.negated === true) {
source = `^(?!${source}).*$`;
}
const regex = picomatch.toRegex(source, options);
if (returnState === true) {
regex.state = state;
}
return regex;
};
/**
* Create a regular expression from a parsed glob pattern.
*
* ```js
* const picomatch = require('picomatch');
* const state = picomatch.parse('*.js');
* // picomatch.compileRe(state[, options]);
*
* console.log(picomatch.compileRe(state));
* //=> /^(?:(?!\.)(?=.)[^/]*?\.js)$/
* ```
* @param {String} `state` The object returned from the `.parse` method.
* @param {Object} `options`
* @param {Boolean} `returnOutput` 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.
* @param {Boolean} `returnState` Implementors may use this argument to return the state from the parsed glob with the returned regular expression.
* @return {RegExp} Returns a regex created from the given pattern.
* @api public
*/
picomatch.makeRe = (input, options = {}, returnOutput = false, returnState = false) => {
if (!input || typeof input !== 'string') {
throw new TypeError('Expected a non-empty string');
}
let parsed = { negated: false, fastpaths: true };
if (options.fastpaths !== false && (input[0] === '.' || input[0] === '*')) {
parsed.output = parse.fastpaths(input, options);
}
if (!parsed.output) {
parsed = parse(input, options);
}
return picomatch.compileRe(parsed, options, returnOutput, returnState);
};
/**
* Create a regular expression from the given regex source string.
*
* ```js
* const picomatch = require('picomatch');
* // picomatch.toRegex(source[, options]);
*
* const { output } = picomatch.parse('*.js');
* console.log(picomatch.toRegex(output));
* //=> /^(?:(?!\.)(?=.)[^/]*?\.js)$/
* ```
* @param {String} `source` Regular expression source string.
* @param {Object} `options`
* @return {RegExp}
* @api public
*/
picomatch.toRegex = (source, options) => {
try {
const opts = options || {};
return new RegExp(source, opts.flags || (opts.nocase ? 'i' : ''));
} catch (err) {
if (options && options.debug === true) throw err;
return /$^/;
}
};
/**
* Picomatch constants.
* @return {Object}
*/
picomatch.constants = constants;
/**
* Expose "picomatch"
*/
module.exports = picomatch;

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