844728d9dc
Summary: group files rename Reviewed By: passy Differential Revision: D33889860 fbshipit-source-id: 888e173fc72b5e126c1e41324b6cae6be29274c5
40 lines
1.2 KiB
TypeScript
40 lines
1.2 KiB
TypeScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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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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* @format
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*/
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/**
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* There are some env vars which affect transformations, so the Metro/Babel cache should be invalidated when at least one of them changed.
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*
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* If any issues found with such approach, we can fallback to the implementation which always invalidates caches, but also makes bundling significantly slower:
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* export default function getCacheKey() { return Math.random().toString(36); }
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*/
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import {default as flipperEnv} from './flipper-env';
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import fs from 'fs-extra';
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import path from 'path';
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let selfChecksum: string | undefined;
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function getSelfChecksum() {
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if (!selfChecksum) {
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selfChecksum = fs
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.readFileSync(path.resolve(__dirname, '..', 'lib', 'checksum.txt'))
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.toString();
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}
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return selfChecksum;
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}
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export default function getCacheKey() {
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const key = [
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getSelfChecksum(),
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...Object.entries(flipperEnv)
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.sort(([name1, _value1], [name2, _value2]) => name1.localeCompare(name2))
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.map(([name, value]) => `${name}=${value}`),
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].join('|');
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return key;
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}
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