install_and_run.js

import { exec } from 'child_process';
import { promisify } from 'util';
import { unlink } from 'fs/promises';
import path from 'path';
import { fileURLToPath } from 'url';

const execAsync = promisify(exec);

const zipUrl = process.env.ZIP_URL;
const downloadPath = '/tmp/app.zip';
const extractPath = '/app';

async function runCommand(command) {
  try {
    const { stdout, stderr } = await execAsync(command);
    console.log(`Command executed successfully: ${command}`);
    if (stdout) console.log(stdout);
    if (stderr) console.error(stderr);
    return stdout;
  } catch (error) {
    console.error(`Error executing command: ${command}`);
    console.error(error.stderr || error.message);
    throw error;
  }
}

async function main() {
  if (!zipUrl) {
    console.error("Error: ZIP_URL environment variable not set.");
    process.exit(1);
  }

  try {
    console.log(`Downloading ZIP file from: ${zipUrl} to ${downloadPath}`);
    await runCommand(`wget "${zipUrl}" -O ${downloadPath}`);

    console.log(`Extracting ZIP file to: ${extractPath}`);
    await runCommand(`unzip -o ${downloadPath} -d ${extractPath}`);

    console.log("Removing downloaded ZIP file...");
    await unlink(downloadPath);

    console.log("Starting the application...");
    await runCommand('npm start');

  } catch (error) {
    console.error("An error occurred:", error);
    process.exit(1);
  }
}

main();