exclusionList.js

/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @oncall react_native
 */

'use strict';

var path = require('path');

var list = [/\/__tests__\/.*/];

function escapeRegExp(pattern) {
  if (Object.prototype.toString.call(pattern) === '[object RegExp]') {
    // the forward slash may or may not be escaped in regular expression depends
    // on if it's in brackets. See this post for details
    // https://github.com/nodejs/help/issues/3039. The or condition in string
    // replace regexp is to cover both use cases.
    // We should replace all forward slashes to proper OS specific separators.
    // The separator needs to be escaped in the regular expression source string,
    // hence the '\\' prefix.
    return pattern.source.replace(/\/|\\\//g, '\\' + path.sep);
  } else if (typeof pattern === 'string') {
    // Make sure all the special characters used by regular expression are properly
    // escaped. The string inputs are supposed to match as is.
    var escaped = pattern.replace(/[\-\[\]\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&');
    // convert the '/' into an escaped local file separator. The separator needs
    // to be escaped in the regular expression source string, hence the '\\' prefix.
    return escaped.replaceAll('/', '\\' + path.sep);
  } else {
    throw new Error('Unexpected exclusion pattern: ' + pattern);
  }
}

function exclusionList(additionalExclusions) {
  return new RegExp(
    '(' +
      (additionalExclusions || []).concat(list).map(escapeRegExp).join('|') +
      ')$',
  );
}

module.exports = exclusionList;