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import { readFileSync, writeFileSync } from 'node:fs';

import { join, resolve } from 'node:path';

import { exportVariable } from '@actions/core';

const supportedVersions = JSON.parse(readFileSync('versions.json'));

const nodeKeys = readFileSync(resolve(import.meta.dirname, 'keys', 'node.keys'))

.toString()

.trim()

.split('\n');

const updatedVersions = [];

try {

console.log(

`Found major versions in versions.json: ${Object.keys(supportedVersions).join(', ')}`,

);

console.log('Grabbing Index.json files');

const availableVersions = await fetch(

'https://nodejs.org/download/release/index.json',

);

const officialIndexJson = await availableVersions.json();

for (let supportedVersion in supportedVersions) {

console.log(`Checking for updates for ${supportedVersion}`);

let latestVersion = officialIndexJson.find((indexVersion) =>

indexVersion.version.startsWith(`v${supportedVersion}`),

);

console.log(`\tLatest version: ${latestVersion.version}

\tReleased: ${latestVersion.date}

\tSecurity release: ${latestVersion.security}`);

for (let variant in supportedVersions[supportedVersion].variants) {

const dockerfilePath = join('.', supportedVersion, variant, 'Dockerfile');

const currentDockerfile = readFileSync(dockerfilePath, 'utf-8');

const localVersion =

'v' +

currentDockerfile.match(/NODE_VERSION=(?<version>\d*\.\d*\.\d)/).groups[

'version'

];

const arches = supportedVersions[supportedVersion].variants[variant];

let baseImage;

let archString = '';

let dockerfileTemplate;

if (variant.startsWith('alpine')) {

dockerfileTemplate = readFileSync(

resolve(import.meta.dirname, 'Dockerfile-alpine.template'),

).toString();

baseImage = `alpine:${variant.replace(/alpine/, '')}`;

if (arches.includes('amd64'))

archString += `x86_64) ARCH='x64' OPENSSL_ARCH=linux-x86_64;; \\\n `;

if (arches.includes('arm64v8'))

archString += `aarch64) OPENSSL_ARCH=linux-aarch64;; \\\n `;

if (arches.includes('arm32v6') || arches.includes('arm32v7'))

archString += `arm*) OPENSSL_ARCH=linux-armv4;; \\\n `;

if (arches.includes('ppc64le'))

archString += `ppc64le) OPENSSL_ARCH=linux-ppc64le;; \\\n `;

if (arches.includes('s390x'))

archString += `s390x) OPENSSL_ARCH=linux-s390x;; \\\n `;

archString += '*) echo "unsupported architecture"; exit 1 ;; \\';

} else if (variant.endsWith('-slim')) {

dockerfileTemplate = readFileSync(

resolve(import.meta.dirname, 'Dockerfile-slim.template'),

).toString();

baseImage = `debian:${variant}`;

if (arches.includes('amd64'))

archString += `amd64) ARCH='x64' OPENSSL_ARCH='linux-x86_64';; \\\n `;

if (arches.includes('ppc64le'))

archString += `ppc64el) ARCH='ppc64le' OPENSSL_ARCH='linux-ppc64le';; \\\n `;

if (arches.includes('s390x'))

archString += `s390x) ARCH='s390x' OPENSSL_ARCH='linux*-s390x';; \\\n `;

if (arches.includes('arm64v8'))

archString += `arm64) ARCH='arm64' OPENSSL_ARCH='linux-aarch64';; \\\n `;

if (arches.includes('arm32v7'))

archString += `armhf) ARCH='armv7l' OPENSSL_ARCH='linux-armv4';; \\\n `;

archString += '*) echo "unsupported architecture"; exit 1 ;; \\';

} else {

dockerfileTemplate = readFileSync(

resolve(import.meta.dirname, 'Dockerfile-debian.template'),

).toString();

baseImage = `buildpack-deps:${variant}`;

if (arches.includes('amd64'))

archString += `amd64) ARCH='x64';; \\\n `;

if (arches.includes('ppc64le'))

archString += `ppc64el) ARCH='ppc64le';; \\\n `;

if (arches.includes('s390x'))

archString += `s390x) ARCH='s390x';; \\\n `;

if (arches.includes('arm64v8'))

archString += `arm64) ARCH='arm64';; \\\n `;

if (arches.includes('arm32v7'))

archString += `armhf) ARCH='armv7l';; \\\n `;

archString += '*) echo "unsupported architecture"; exit 1 ;; \\';

}

let dockerfileOutput = dockerfileTemplate

.replace(/^FROM.+$/m, `FROM ${baseImage}`)

.replace(

/^ENV NODE_VERSION=.+$/m,

`ENV NODE_VERSION=${latestVersion.version.substring(1)}`,

)

.replace(

/^(\s*)"\${NODE_KEYS\[@]}".*$/m,

((keys) => keys.map((key) => `$1${key} \\`).join('\n'))(nodeKeys),

)

.replace(/"\$\{SUPPORTED_ARCH\[@\]\}"/s, archString);

if (parseInt(supportedVersion, 10) >= 26) {

dockerfileOutput = dockerfileOutput.replace(

/ENV YARN_VERSION.*\*\n/s,

'',

);

} else {

// Strip out rust and cargo packages for Node.js < 26

dockerfileOutput = dockerfileOutput.replace(

/\s{4}rust \\.*cargo \\\s*/s,

'',

);

}

if (dockerfileOutput === currentDockerfile) {

console.log(`\t${variant}: everything up to date!`);

} else if (latestVersion.version !== localVersion) {

console.log(`\t${variant}: updating to ${latestVersion.version}`);

updatedVersions.push(latestVersion.version);

writeFileSync(dockerfilePath, dockerfileOutput);

} else {

console.warn(

`\t${variant}: non-version changes detected, but file not updated.`,

);

}

}

}

if (updatedVersions.length !== 0) {

// Let the GitHub Action library set the GITHUB_ENV file rather than manually handling it

exportVariable(

'NODE_PR_TITLE',

`feat: Node.js ${[...new Set(updatedVersions)].join(', ')}`,

);

} else {

console.log('No Pull Request will be created.');

}

} catch (error) {

console.error(error);

process.exit(1);

}