@goreleaser/example/lib.js

Example NPM publish pipeline

const { archives } = require("./package.json");
const fs = require("fs");
const crypto = require("crypto");
const path = require("path");
const JSZip = require("jszip");
const tar = require("tar");
const axios = require("axios");
const { spawnSync } = require("child_process");

const getArchive = () => {
	let target = `${process.platform}-${process.arch}`;
	const archive = archives[target];
	if (!archive) {
		throw new Error(`No archive available for ${target}`);
	}
	return archive;
};

const binDir = path.join(__dirname, "bin");

async function extractTar(tarPath, binaries, dir) {
	try {
		await tar.x({
			file: tarPath,
			cwd: dir,
			filter: (path) => binaries.includes(path),
		});
		console.log(`Successfully extracted binaries to "${dir}"`);
	} catch (err) {
		throw new Error(`Extraction failed: ${err.message}`);
	}
}

async function extractZip(zipPath, binaries, dir) {
	try {
		const zipData = fs.readFileSync(zipPath);
		const zip = await JSZip.loadAsync(zipData);
		for (const binary of binaries) {
			if (!zip.files[binary]) {
				throw new Error(
					`Error: ${binary} does not exist in ${zipPath}`,
				);
			}

			const content = await zip.files[binary].async("nodebuffer");
			if (!fs.existsSync(dir)) {
				fs.mkdirSync(dir, { recursive: true });
			}
			const file = path.join(dir, binary);
			fs.writeFileSync(file, content);
			fs.chmodSync(file, "755");
			console.log(`Successfully extracted "${binary}" to "${dir}"`);
		}
	} catch (err) {
		throw new Error(`Extraction failed: ${err.message}`);
	}
}

const run = async (bin) => {
	await install();
	if (process.platform === "win32") {
		bin += ".exe";
	}
	const [, , ...args] = process.argv;
	let result = spawnSync(path.join(binDir, bin), args, {
		cwd: process.cwd(),
		stdio: "inherit",
	});
	if (result.error) {
		console.error(result.error);
	}
	return result.status;
};

const install = async () => {
	try {
		let archive = getArchive();
		if (await exists(archive)) {
			return;
		}
		let tmp = fs.mkdtempSync("archive-");
		let archivePath = path.join(tmp, archive.name);
		await download(archive.url, archivePath);
		verify(archivePath, archive.checksum);

		if (!fs.existsSync(binDir)) {
			fs.mkdirSync(binDir);
		}
		switch (archive.format) {
			case "binary":
				const bin = path.join(binDir, archive.bins[0]);
				fs.copyFileSync(archivePath, bin);
				fs.chmodSync(bin, 0o755);
				return;
			case "zip":
				return extractZip(archivePath, archive.bins, binDir);
			case "tar":
			case "tar.gz":
			case "tgz":
				return extractTar(archivePath, archive.bins, binDir);
			case "tar.zst":
			case "tzst":
			case "tar.xz":
			case "txz":
			default:
				throw new Error(`unsupported format: ${archive.format}`);
		}
	} catch (err) {
		throw new Error(`Installation failed: ${err.message}`);
	}
};

const verify = (filename, checksum) => {
	if (checksum.algorithm == "" || checksum.digest == "") {
		console.warn("Warning: No checksum provided for verification");
		return;
	}
	let digest = crypto
		.createHash(checksum.algorithm)
		.update(fs.readFileSync(filename))
		.digest("hex");
	if (digest != checksum.digest) {
		throw new Error(
			`${filename}: ${checksum.algorithm} does not match, expected ${checksum.digest}, got ${digest}`,
		);
	}
};

const download = async (url, filename) => {
	try {
		console.log(`Downloading ${url} to ${filename}...`);
		const dir = path.dirname(filename);
		if (!fs.existsSync(dir)) {
			fs.mkdirSync(dir, { recursive: true });
		}

		const response = await axios({
			method: "GET",
			url: url,
			responseType: "stream",
			timeout: 300000, // 5min
		});

		const writer = fs.createWriteStream(filename);
		response.data.pipe(writer);

		return new Promise((resolve, reject) => {
			writer.on("finish", () => {
				console.log(`Download complete: ${filename}`);
				resolve(dir);
			});

			writer.on("error", (err) => {
				console.error(`Error writing file: ${err.message}`);
				reject(err);
			});
		});
	} catch (err) {
		throw new Error(`Download failed: ${err.message}`);
	}
};

function exists(archive) {
	if (!fs.existsSync(binDir)) {
		return false;
	}
	return archive.bins.every((bin) => fs.existsSync(path.join(binDir, bin)));
}

module.exports = {
	install,
	run,
	getArchive,
};