deploy.js

(async function() {
    try {
      const yargs = require('yargs');
      const {exec} = require('./utils');
      
      // Define required arguments, help section and get arguments
      const argv = yargs
        .usage(`Usage: $0 <environment> [options]`) // help "Usage" description
        .demandCommand(1) // requiring 1 argument to be passed
        .option('skip-build', {
          describe: 'To skip build process',
        })
        .help() // for --help and -h to work
        .argv;
      
      const ENVIRONMENT = argv._[0];
      let BUILD_OPTIONS = '';
      
      // Set options based on environment
      switch (ENVIRONMENT) {
        case 'integration':
          break;
          
        case 'staging':
          BUILD_OPTIONS = '--config config/webpack.staging.js';
          break;
          
        case 'production':
          BUILD_OPTIONS = '--config config/webpack.prod.js';
          break;
          
        default:
          throw new Error(`ERROR: wrong env as first argument: ${ENVIRONMENT}`);
      }
      
      if (!argv['skip-build']) {
        console.log('[CLEANUP]');
        await exec('rm -rf ./dist');
        
        console.log('[BUILDING]');
        await exec(`webpack --progress --profile --bail ${BUILD_OPTIONS}`);
      }
  
      console.log('[UPLOADING]');
      await exec('aws --region eu-west-1 s3 sync --acl public-read dist/ s3://my-bucket/');
    } catch (error) {
      console.error(error);
      process.exit(error && error.code || 1); // properly exit with error code (useful for CI or chaining)
    }
  })();