54 lines
1.3 KiB
JavaScript
54 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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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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'use strict';
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const crypto = require('crypto');
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const fs = require('fs');
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const path = require('path');
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function getGlobalCacheKey(files, values) {
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const presetVersion = require('../package').dependencies['babel-preset-fbjs'];
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const chunks = [
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process.env.NODE_ENV,
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process.env.BABEL_ENV,
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presetVersion,
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...values,
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...files.map(file => fs.readFileSync(file)),
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];
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return chunks
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.reduce(
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(hash, chunk) => hash.update('\0', 'utf-8').update(chunk || ''),
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crypto.createHash('md5')
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)
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.digest('hex');
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}
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function getCacheKeyFunction(globalCacheKey) {
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return (src, file, configString, options) => {
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const {instrument, config} = options;
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const rootDir = config && config.rootDir;
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return crypto
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.createHash('md5')
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.update(globalCacheKey)
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.update('\0', 'utf8')
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.update(src)
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.update('\0', 'utf8')
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.update(rootDir ? path.relative(config.rootDir, file) : '')
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.update('\0', 'utf8')
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.update(instrument ? 'instrument' : '')
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.digest('hex');
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};
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}
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module.exports = (files = [], values = []) => {
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return getCacheKeyFunction(getGlobalCacheKey(files, values));
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};
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