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createCacheKeyFunction.js
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createCacheKeyFunction.js
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/**
* Copyright (c) 2013-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
const crypto = require('crypto');
const fs = require('fs');
const path = require('path');
function getGlobalCacheKey(files, values) {
const presetVersion = require('../package').dependencies['babel-preset-fbjs'];
const chunks = [
process.env.NODE_ENV,
process.env.BABEL_ENV,
presetVersion,
...values,
...files.map(file => fs.readFileSync(file)),
];
return chunks
.reduce(
(hash, chunk) => hash.update('\0', 'utf-8').update(chunk || ''),
crypto.createHash('md5')
)
.digest('hex');
}
function getCacheKeyFunction(globalCacheKey) {
return (src, file, configString, options) => {
// Jest 27 passes a single options bag which contains `configString` rather than as a separate argument
options = options || configString;
const {instrument, config} = options;
const rootDir = config && config.rootDir;
return crypto
.createHash('md5')
.update(globalCacheKey)
.update('\0', 'utf8')
.update(src)
.update('\0', 'utf8')
.update(rootDir ? path.relative(config.rootDir, file) : '')
.update('\0', 'utf8')
.update(instrument ? 'instrument' : '')
.digest('hex');
};
}
module.exports = (files = [], values = []) => {
return getCacheKeyFunction(getGlobalCacheKey(files, values));
};