forked from jestjs/jest
/
index.ts
60 lines (54 loc) 路 1.65 KB
/
index.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
import {createHash} from 'crypto';
// eslint-disable-next-line no-restricted-imports
import {readFileSync} from 'fs';
import {relative} from 'path';
import type {Config} from '@jest/types';
// Should mirror `import('@jest/transform').TransformOptions`
type CacheKeyOptions = {
config: Config.ProjectConfig;
configString: string;
instrument: boolean;
};
type GetCacheKeyFunction = (
sourceText: string,
sourcePath: Config.Path,
options: CacheKeyOptions,
) => string;
function getGlobalCacheKey(files: Array<string>, values: Array<string>) {
return [
process.env.NODE_ENV,
process.env.BABEL_ENV,
...values,
...files.map((file: string) => readFileSync(file)),
]
.reduce(
(hash, chunk) => hash.update('\0', 'utf8').update(chunk || ''),
createHash('md5'),
)
.digest('hex');
}
function getCacheKeyFunction(globalCacheKey: string): GetCacheKeyFunction {
return (sourceText, sourcePath, options) => {
const {config, instrument} = options;
return createHash('md5')
.update(globalCacheKey)
.update('\0', 'utf8')
.update(sourceText)
.update('\0', 'utf8')
.update(config.rootDir ? relative(config.rootDir, sourcePath) : '')
.update('\0', 'utf8')
.update(instrument ? 'instrument' : '')
.digest('hex');
};
}
export default (
files: Array<string> = [],
values: Array<string> = [],
): GetCacheKeyFunction => getCacheKeyFunction(getGlobalCacheKey(files, values));