34 lines
930 B
JavaScript
34 lines
930 B
JavaScript
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/**
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* Copyright 2013-2015, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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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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function buildCacheKey(files, base) {
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return files.reduce(
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(src, fileName) => src + fs.readFileSync(fileName),
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base
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);
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}
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module.exports = files => {
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const presetVersion = require('../package').dependencies['babel-preset-fbjs'];
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const cacheKey = buildCacheKey(files, presetVersion);
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return (src, file, configString, options) => {
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return crypto
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.createHash('md5')
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.update(cacheKey)
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.update(src + file + configString)
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.update(options && options.instrument ? 'instrument' : '')
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.digest('hex');
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};
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};
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