Prepare lambda installation package with Gulp

gulpfile.js

const { src, dest, series, parallel } = require('gulp');
const install = require('gulp-install');
const del = require('del');
const zip = require('gulp-zip');

const BUILD_DIR = 'build';

const packageInfo = require('./package.json');

function clean() {
  return del([
    BUILD_DIR,
  ]);
}

function js() {
  return src('src/**/*.js')
    .pipe(dest(BUILD_DIR));
}

function dependencies() {
  return src(['package.json', 'package-lock.json'])
    .pipe(dest(BUILD_DIR))
    .pipe(install({
      production:true
    }));
}

function package() {
  return src(`${BUILD_DIR}/**/*`)
    .pipe(zip(`${packageInfo.name}-${packageInfo.version}.zip`))
    .pipe(dest('dist'));
}

exports.default = series(
  clean,
  parallel(js, dependencies),
  package,
);