99 lines
3.3 KiB
JavaScript
99 lines
3.3 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true
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});
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exports.default = globsToMatcher;
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function _picomatch() {
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const data = _interopRequireDefault(require('picomatch'));
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_picomatch = function () {
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return data;
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};
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return data;
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}
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var _replacePathSepForGlob = _interopRequireDefault(
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require('./replacePathSepForGlob')
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);
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function _interopRequireDefault(obj) {
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return obj && obj.__esModule ? obj : {default: obj};
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}
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/**
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* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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const globsToMatchersMap = new Map();
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const picomatchOptions = {
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dot: true
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};
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/**
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* Converts a list of globs into a function that matches a path against the
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* globs.
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*
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* Every time picomatch is called, it will parse the glob strings and turn
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* them into regexp instances. Instead of calling picomatch repeatedly with
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* the same globs, we can use this function which will build the picomatch
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* matchers ahead of time and then have an optimized path for determining
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* whether an individual path matches.
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*
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* This function is intended to match the behavior of `micromatch()`.
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*
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* @example
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* const isMatch = globsToMatcher(['*.js', '!*.test.js']);
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* isMatch('pizza.js'); // true
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* isMatch('pizza.test.js'); // false
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*/
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function globsToMatcher(globs) {
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if (globs.length === 0) {
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// Since there were no globs given, we can simply have a fast path here and
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// return with a very simple function.
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return () => false;
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}
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const matchers = globs.map(glob => {
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if (!globsToMatchersMap.has(glob)) {
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const isMatch = (0, _picomatch().default)(glob, picomatchOptions, true);
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const matcher = {
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isMatch,
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// Matchers that are negated have different behavior than matchers that
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// are not negated, so we need to store this information ahead of time.
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negated: isMatch.state.negated || !!isMatch.state.negatedExtglob
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};
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globsToMatchersMap.set(glob, matcher);
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}
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return globsToMatchersMap.get(glob);
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});
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return path => {
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const replacedPath = (0, _replacePathSepForGlob.default)(path);
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let kept = undefined;
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let negatives = 0;
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for (let i = 0; i < matchers.length; i++) {
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const {isMatch, negated} = matchers[i];
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if (negated) {
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negatives++;
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}
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const matched = isMatch(replacedPath);
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if (!matched && negated) {
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// The path was not matched, and the matcher is a negated matcher, so we
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// want to omit the path. This means that the negative matcher is
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// filtering the path out.
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kept = false;
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} else if (matched && !negated) {
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// The path was matched, and the matcher is not a negated matcher, so we
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// want to keep the path.
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kept = true;
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}
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}
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// If all of the globs were negative globs, then we want to include the path
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// as long as it was not explicitly not kept. Otherwise only include
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// the path if it was kept. This allows sets of globs that are all negated
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// to allow some paths to be matched, while sets of globs that are mixed
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// negated and non-negated to cause the negated matchers to only omit paths
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// and not keep them.
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return negatives === matchers.length ? kept !== false : !!kept;
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};
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}
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