| 1 | /**
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| 2 | * Copyright (c) 2015-present, Facebook, Inc.
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| 3 | *
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| 4 | * This source code is licensed under the MIT license found in the
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| 5 | * LICENSE file in the root directory of this source tree.
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| 6 | */
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| 7 | ;
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| 8 |
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| 9 | const crypto = require('crypto');
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| 10 |
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| 11 | const macroCheck = new RegExp('[./]macro');
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| 12 |
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| 13 | module.exports = function() {
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| 14 | return {
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| 15 | // This function transforms the Babel configuration on a per-file basis
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| 16 | config(config, { source }) {
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| 17 | // Babel Macros are notoriously hard to cache, so they shouldn't be
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| 18 | // https://github.com/babel/babel/issues/8497
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| 19 | // We naively detect macros using their package suffix and add a random token
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| 20 | // to the caller, a valid option accepted by Babel, to compose a one-time
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| 21 | // cacheIdentifier for the file. We cannot tune the loader options on a per
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| 22 | // file basis.
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| 23 | if (macroCheck.test(source)) {
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| 24 | return Object.assign({}, config.options, {
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| 25 | caller: Object.assign({}, config.options.caller, {
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| 26 | craInvalidationToken: crypto.randomBytes(32).toString('hex'),
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| 27 | }),
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| 28 | });
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| 29 | }
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| 30 | return config.options;
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| 31 | },
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| 32 | };
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| 33 | };
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