setup-node/src/cache-restore.ts

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import * as cache from '@actions/cache';
import * as core from '@actions/core';
import * as glob from '@actions/glob';
import path from 'path';
import fs from 'fs';
import {State, Outputs} from './constants';
import {
getCacheDirectoryPath,
getPackageManagerInfo,
PackageManagerInfo
} from './cache-utils';
export const restoreCache = async (packageManager: string) => {
const packageManagerInfo = await getPackageManagerInfo(packageManager);
if (!packageManagerInfo) {
throw new Error(`Caching for '${packageManager}' is not supported`);
}
const platform = process.env.RUNNER_OS;
const cachePath = await getCacheDirectoryPath(
packageManagerInfo,
packageManager
);
const lockFilePath = findLockFile(packageManagerInfo);
const fileHash = await glob.hashFiles(lockFilePath);
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const primaryKey = `node-cache-${platform}-${packageManager}-${fileHash}`;
core.debug(`primary key is ${primaryKey}`);
core.saveState(State.CachePrimaryKey, primaryKey);
const cacheKey = await cache.restoreCache([cachePath], primaryKey);
if (!cacheKey) {
core.info(`${packageManager} cache is not found`);
return;
}
core.saveState(State.CacheMatchedKey, cacheKey);
core.info(`Cache restored from key: ${cacheKey}`);
};
const findLockFile = (packageManager: PackageManagerInfo) => {
let lockFiles = packageManager.lockFilePatterns;
const workspace = process.env.GITHUB_WORKSPACE!;
const rootContent = fs.readdirSync(workspace);
const lockFile = lockFiles.find(item => rootContent.includes(item));
if (!lockFile) {
throw new Error(
`Dependencies lock file is not found in ${workspace}. Supported file patterns: ${lockFiles.toString()}`
);
}
return path.join(workspace, lockFile);
};