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Filename : index.js
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'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.default = createCacheKey;
function _crypto() {
  const data = require('crypto');
  _crypto = function () {
    return data;
  };
  return data;
}
function _fs() {
  const data = require('fs');
  _fs = function () {
    return data;
  };
  return data;
}
function _path() {
  const data = require('path');
  _path = function () {
    return data;
  };
  return data;
}
/**
 * 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.
 *
 */

// eslint-disable-next-line no-restricted-imports

// Should mirror `import('@jest/transform').TransformOptions`

// Should mirror `import('@jest/transform').Transformer['getCacheKey']`

const {NODE_ENV, BABEL_ENV} = process.env;
function getGlobalCacheKey(files, values, length) {
  return [
    NODE_ENV,
    BABEL_ENV,
    ...values,
    ...files.map(file => (0, _fs().readFileSync)(file))
  ]
    .reduce(
      (hash, chunk) => hash.update('\0', 'utf8').update(chunk || ''),
      (0, _crypto().createHash)('sha1')
    )
    .digest('hex')
    .substring(0, length);
}
function getCacheKeyFunction(globalCacheKey, length) {
  return (sourceText, sourcePath, configString, options) => {
    // Jest 27 passes a single options bag which contains `configString` rather than as a separate argument.
    // We can hide that API difference, though, so this module is usable for both jest@<27 and jest@>=27
    const inferredOptions = options || configString;
    const {config, instrument} = inferredOptions;
    return (0, _crypto().createHash)('sha1')
      .update(globalCacheKey)
      .update('\0', 'utf8')
      .update(sourceText)
      .update('\0', 'utf8')
      .update(
        config.rootDir ? (0, _path().relative)(config.rootDir, sourcePath) : ''
      )
      .update('\0', 'utf8')
      .update(instrument ? 'instrument' : '')
      .digest('hex')
      .substring(0, length);
  };
}

/**
 * Returns a function that can be used to generate cache keys based on source code of provided files and provided values.
 *
 * @param files - Array of absolute paths to files whose code should be accounted for when generating cache key
 * @param values - Array of string values that should be accounted for when generating cache key
 * @param length - Length of the resulting key. The default is `32`, or `16` on Windows.
 * @returns A function that can be used to generate cache keys.
 */
function createCacheKey(
  files = [],
  values = [],
  length = process.platform === 'win32' ? 16 : 32
) {
  return getCacheKeyFunction(getGlobalCacheKey(files, values, length), length);
}