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const crypto = require('node:crypto');

const fs = require('node:fs');

const path = require('node:path');

// Per platform hash versions to bust the cache on different platforms

const HASH_VERSIONS = {

darwin: 4,

win32: 4,

linux: 4

};

// Base files to hash

const filesToHash = [

path.resolve(__dirname, '../DEPS'),

path.resolve(__dirname, '../yarn.lock'),

path.resolve(__dirname, '../script/sysroots.json'),

path.resolve(__dirname, '../.github/actions/checkout/action.yml'),

path.resolve(__dirname, '../script/v8-patch-fingerprint.py')

];

const addAllFiles = (dir) => {

for (const child of fs.readdirSync(dir).sort()) {

const childPath = path.resolve(dir, child);

if (fs.statSync(childPath).isDirectory()) {

addAllFiles(childPath);

} else {

filesToHash.push(childPath);

}

}

};

// Add all patch files to the hash

addAllFiles(path.resolve(__dirname, '../patches'));

// Create Hash

const hasher = crypto.createHash('SHA256');

const addToHashAndLog = (s) => {

return hasher.update(s);

};

addToHashAndLog(`HASH_VERSION:${HASH_VERSIONS[process.platform]}`);

for (const file of filesToHash) {

hasher.update(fs.readFileSync(file));

}

// Add the GCLIENT_EXTRA_ARGS variable to the hash

const extraArgs = process.env.GCLIENT_EXTRA_ARGS || 'no_extra_args';

addToHashAndLog(extraArgs);

// Write the hash to disk

fs.writeFileSync(path.resolve(__dirname, '../.depshash'), hasher.digest('hex'));