setup.js

# !/usr/bin/env node

// setup.js -- one-time dependency installation for local development
// Run once after cloning:  node setup.js

const { execSync } = require("child_process");
const fs = require("fs");
const path = require("path");

const REPO_ROOT = __dirname;

const GREEN  = "\x1b[32m";
const YELLOW = "\x1b[33m";
const RED    = "\x1b[31m";
const CYAN   = "\x1b[36m";
const RESET  = "\x1b[0m";

const ok   = (msg) => console.log(`${GREEN}[ok]   ${RESET}${msg}`);
const warn = (msg) => console.log(`${YELLOW}[warn] ${RESET}${msg}`);
const fail = (msg) => { console.error(`${RED}[error]${RESET} ${msg}`); process.exit(1); };
const run  = (cmd, cwd = REPO_ROOT) => execSync(cmd, { cwd, stdio: "inherit" });

console.log();
console.log(`${CYAN}JavaWorkshop -- setup${RESET}`);
console.log(`${CYAN}---------------------${RESET}`);
console.log();

// -- Prerequisites ------------------------------------------------------------

const check = (cmd) => { try { execSync(`${cmd} --version`, { stdio: "pipe" }); return true; } catch { return false; } };

if (!check("java"))   fail("Java 21+ not found. Install from <https://adoptium.net>");
if (!check("mvn"))    fail("Maven not found. Install from <https://maven.apache.org>");
if (!check("node"))   fail("Node.js 20+ not found. Install from <https://nodejs.org>");
if (!check("npm"))    fail("npm not found (should ship with Node).");
if (!check("docker")) warn("Docker not found -- you will need MySQL and ActiveMQ running locally.");

try {
    const raw = execSync("java -version 2>&1", { shell: true }).toString()
        || execSync("java -version", { stdio: ["pipe", "pipe", "pipe"] }).toString();
    const match = raw.match(/version "(\d+)/);
    if (match && parseInt(match[1]) < 21) warn(`Java 21 recommended (found version ${match[1]})`);
} catch { /*version check is best-effort*/ }

try {
    const raw = execSync("node --version", { stdio: "pipe" }).toString().trim();
    const match = raw.match(/^v(\d+)/);
    if (match && parseInt(match[1]) < 20) warn(`Node.js 20+ required (found ${raw}) — upgrade at https://nodejs.org`);
} catch { /*version check is best-effort*/ }

ok("Prerequisites look good");
console.log();

// -- .env ---------------------------------------------------------------------

const envFile    = path.join(REPO_ROOT, ".env");
const envExample = path.join(REPO_ROOT, ".env.example");

if (!fs.existsSync(envFile)) {
    fs.copyFileSync(envExample, envFile);
    ok("Created .env from .env.example -- review and set DB_PASSWORD before running");
} else {
    ok(".env already exists -- skipping");
}
console.log();

// -- Env validation -----------------------------------------------------------

const envVars = {};
fs.readFileSync(envFile, "utf8")
    .split("\n")
    .forEach((line) => {
        line = line.trim();
        if (!line || line.startsWith("#")) return;
        const idx = line.indexOf("=");
        if (idx > 0) {
            const key = line.slice(0, idx).trim();
            const val = line.slice(idx + 1).trim();
            envVars[key] = val;
        }
    });

const REQUIRED = ["DB_USERNAME", "DB_PASSWORD"];
const missing  = REQUIRED.filter((v) => !envVars[v]);

if (envVars["DB_PASSWORD"] === "changeme") {
    warn("DB_PASSWORD is still set to the default 'changeme' -- update it in .env before running");
}
if (missing.length > 0) {
    fail(`Missing required env variables in .env: ${missing.join(", ")}`);
}

ok("Environment variables look good");
console.log();

// -- Backend ------------------------------------------------------------------

console.log("Building backend (mvn clean install -DskipTests)...");
run("mvn clean install -DskipTests -q", path.join(REPO_ROOT, "backend"));
ok("Backend built");
console.log();

// -- Frontend -----------------------------------------------------------------

console.log("Installing frontend dependencies (npm install)...");
run("npm install --silent", path.join(REPO_ROOT, "frontend"));
ok("Frontend dependencies installed");
console.log();

// -- Done ---------------------------------------------------------------------

console.log(`${GREEN}Setup complete.${RESET}`);
console.log();
console.log("Next steps:");
console.log("  Full stack (Docker):  docker compose up --build");
console.log("  Local dev:            see README.md -> Local Development");
console.log();