gulpfile.js

const download = require('gulp-download2');
const gulp = require('gulp');
const hashFiles = require('hash-files');
const zip = require('gulp-zip');
const rename = require("gulp-rename");
const uglify = require('gulp-uglify-es').default;
const replace = require('gulp-token-replace');
const fs = require('fs');

function copyLayers(cb) {
  if (!fs.existsSync("build/layer-hugo-0.76.3.zip")) {
    return download(
      ["https://github.com/formkiq/lambda-layer-git/raw/master/dist/layer-git-2.29.0.zip",
      "https://github.com/formkiq/lambda-layer-hugo/raw/master/dist/layer-hugo-0.76.3.zip"])
      .pipe(gulp.dest('build'));
  }
  cb();
}

function buildUglify(cb) {
	return gulp.src('src/js/*.js')
	  .pipe(uglify({toplevel:true}))
	  .pipe(gulp.dest('build'));
  cb();
}

function buildDeploymentZip(cb) {
  return gulp.src('./build/deployment.js')
   	.pipe(rename("index.js"))
      .pipe(zip('deployment.zip'))
      .pipe(gulp.dest('build'));
  cb();
}

function buildCfCertificateZip(cb) {
  return gulp.src('./build/cf_certificate.js')
   	.pipe(rename("index.js"))
      .pipe(zip('cf_certificate.zip'))
      .pipe(gulp.dest('build'));
  cb();
}

function buildRedirectsZip(cb) {
  return gulp.src('./build/redirects.js')
    .pipe(rename("index.js"))
      .pipe(zip('redirects.zip'))
      .pipe(gulp.dest('build'));
  cb();
}

function buildCloudFormation(cb) {

  var deployment = fs.readFileSync("src/js/deployment.js", "utf8");
	var verifyEmailIdentity = fs.readFileSync("build/verifyEmailIdentity.js", "utf8");
  var redirects = fs.readFileSync("build/redirects.zip").toString('base64');
  var cf_lambda = fs.readFileSync("build/cf_lambda.js", "utf8");
  
	var config = {
  	"version":"v1.4",
    "deployment_hash":hashFiles.sync({files:['./src/js/deployment.js']}),
    "certificate_hash":hashFiles.sync({files:['./src/js/certificate.js']}),
  	"verifyEmailIdentity":verifyEmailIdentity,
    "cf_lambda":cf_lambda,
    "redirects":redirects,
    "awsregion":"{{awsregion}}"
  }

	return gulp.src(['src/yml/*.yml'])
    .pipe(rename("template.yml"))
  	.pipe(replace({global:config}))
  	.pipe(gulp.dest('build'))

	cb();
}

function buildSamZip(cb) {
  return gulp.src(['./build/template.yml', './build/cf_certificate.zip', './build/layer-hugo-0.76.3.zip', './build/layer-git-2.29.0.zip', './build/deployment.zip', './Install.md'])
    .pipe(zip('parima-v1.4.zip'))
    .pipe(gulp.dest('build'));
  cb();
}

exports.default = gulp.series(buildUglify, buildDeploymentZip, buildCfCertificateZip, buildRedirectsZip, copyLayers, buildCloudFormation, buildSamZip)