backend-setup-tool/index.js

A powerful CLI tool to instantly scaffold a clean and scalable Node.js/Express.js backend for SQL or NoSQL projects.

import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));

export function setupBackend(targetDir, databaseType) {
  try {
    const dbFolderMap = {
      SQL: "sql",
      "NoSQL (MongoDB)": "nosql",
    };
    const dbFolderName = dbFolderMap[databaseType];

    if (!dbFolderName) {
      throw new Error(`Unsupported database type: ${databaseType}`);
    }

    // Paths to templates
    const sharedTemplates = path.join(__dirname, "templates/shared");
    const dbSpecificTemplates = path.join(__dirname, "templates", dbFolderName);

    // Verify templates exist
    if (
      !fs.existsSync(sharedTemplates) ||
      !fs.existsSync(dbSpecificTemplates)
    ) {
      throw new Error("Template folders not found");
    }

    // Copy shared files first (excluding package.json)
    fs.cpSync(sharedTemplates, targetDir, {
      recursive: true,
      filter: (src) => !src.endsWith("package.json"),
    });

    // Then copy database-specific files (including the correct package.json)
    fs.cpSync(dbSpecificTemplates, targetDir, {
      recursive: true,
      overwrite: true,
    });

    console.log(
      `✅ Successfully created ${databaseType} project at ${targetDir}`
    );
    console.log('👉 Run "npm install" to install dependencies');
  } catch (error) {
    console.error("❌ Setup failed:", error.message);
    process.exit(1);
  }
}