clean-gen/src/utils/nest-setup.js

A cross-platform CLI tool to generate NestJS clean architecture modules

const path = require("path");
const { execSync } = require("child_process");
const { promisify } = require("util");
const exec = promisify(require("child_process").exec);

const scriptDir = path.join(__dirname);
const setupCleanScript = path.join(scriptDir, "setup.js");

// Colors for output (ANSI escape codes)
const COLORS = {
  GREEN: "\x1b[32m",
  YELLOW: "\x1b[33m",
  RED: "\x1b[31m",
  CYAN: "\x1b[36m",
  NC: "\x1b[0m",
};

module.exports = async function createModule(projectName) {
  if (!projectName) {
    console.error(`${COLORS.RED}❌ Project name is required${COLORS.NC}`);
    process.exit(1);
  }

  try {
    console.log(
      `${COLORS.CYAN}🚀 Setting up new NestJS project with clean architecture...${COLORS.NC}`
    );

    // Check for NestJS CLI
    await checkNestCli();

    // Create new NestJS project
    await createNestProject(projectName);

    // Change to project directory
    process.chdir(projectName);

    // Install additional dependencies
    await installDependencies();

    // Run setup script
    await runSetupScript();

    displaySuccessMessage(projectName);
  } catch (error) {
    handleError(error);
  }
};

async function checkNestCli() {
  console.log(`${COLORS.YELLOW}🔍 Checking for NestJS CLI...${COLORS.NC}`);
  try {
    await exec("nest --version");
    console.log(`${COLORS.GREEN}✓ NestJS CLI already installed${COLORS.NC}`);
  } catch (error) {
    console.log(`${COLORS.YELLOW}📦 Installing NestJS CLI...${COLORS.NC}`);
    await exec("npm install -g @nestjs/cli", { stdio: "inherit" });
    console.log(
      `${COLORS.GREEN}✓ NestJS CLI installed successfully${COLORS.NC}`
    );
  }
}

async function createNestProject(projectName) {
  console.log(`${COLORS.YELLOW}🏗️ Creating NestJS project...${COLORS.NC}`);
  await exec(`nest new ${projectName} -p npm --skip-git`, {
    stdio: "inherit",
  });
}

async function installDependencies() {
  console.log(
    `${COLORS.YELLOW}📦 Installing additional dependencies...${COLORS.NC}`
  );
  const dependencies =
    "@nestjs/config class-validator class-transformer dotenv";
  await exec(`npm install ${dependencies}`, { stdio: "inherit" });
}

async function runSetupScript() {
  try {
    require(setupCleanScript)();
  } catch (error) {
    throw new Error(`Setup script failed: ${error.message}`);
  }
}

function displaySuccessMessage(projectName) {
  console.log(
    `${COLORS.GREEN}✅ Project setup completed successfully! 🎉${COLORS.NC}`
  );
  console.log(`\nTo get started:`);
  console.log(`  cd ${projectName}`);
  console.log(`  npm run start:dev`);
}

function handleError(error) {
  console.error(
    `${COLORS.RED}❌ Error creating NestJS project:${COLORS.NC} ${error.message}`
  );
  if (error.message.includes("nest")) {
    console.error(
      `${COLORS.YELLOW}Try installing @nestjs/cli manually: npm install -g @nestjs/cli${COLORS.NC}`
    );
  }
  process.exit(1);
}