Next.js: Deploy your app from local to server

deploy.js

const { spawn } = require('child_process')

// eg: /Users/your-user-name/.ssh/id_rsa
const SSH_KEY_PATH = ''
// server user name eg: root
const SSH_USER = ''
// server ip address
const SSH_HOST = ''
// app path on server eg: /var/www/site.com
const SERVER_PATH = ''
// use `pm2 list` command to learn
const PM2_APP_NAME = ''

const runCommand = (command, args, cwd) => {
  return new Promise((resolve, reject) => {
    const process = spawn(command, args, { cwd, stdio: 'inherit' })
    process.on('close', code => {
      if (code !== 0) {
        reject(new Error(`Command failed with exit code ${code}`))
      } else {
        resolve()
      }
    })
  })
}

;(async () => {
  try {
    console.log('Building Next.js project...')
    await runCommand('npm', ['run', 'build'], '.')

    console.log('Creating tarball of .next directory...')
    await runCommand(
      'sh',
      ['-c', 'tar -cf - .next | xz -T0 -9 -c > .next-build.tar.xz'],
      '.'
    )

    console.log('Uploading tarball to server...')
    await runCommand('rsync', [
      '-avz',
      '-e',
      `ssh -i ${SSH_KEY_PATH}`,
      '.next-build.tar.xz',
      `${SSH_USER}@${SSH_HOST}:${SERVER_PATH}`
    ])

    console.log('Performing server-side operations...')
    await runCommand('ssh', [
      '-i',
      SSH_KEY_PATH,
      `${SSH_USER}@${SSH_HOST}`,
      `
        cd ${SERVER_PATH} &&
        mkdir -p .next.new &&
        tar -xJf .next-build.tar.xz -C .next.new --strip-components=1 &&
        rm -rf .next.old &&
        mv .next .next.old &&
        mv .next.new .next &&
        rm .next-build.tar.xz &&
        pm2 restart ${PM2_APP_NAME}
      `
    ])

    console.log('Removing local tarball...')
    await runCommand('rm', ['.next-build.tar.xz'], '.')

    console.log('Deployment completed successfully!')
  } catch (error) {
    console.log('Deployment failed:', error)
    process.exit(1)
  }
})()