ft-webplatform/aurelia_project/tasks/build.js

import gulp from 'gulp';
import transpile from './transpile';
import processMarkup from './process-markup';
import processAssets from './process-assets';
import lintJS from './lint-js';
import {build, CLIOptions} from 'aurelia-cli';
import project from '../aurelia.json';
import processDocs from './process-docs';
import livesiteJS from './livesite-js';
import cleanAssets from './clean';
import copyJsFilesToPL from './copy-js';
import copyDataToPL from './copy-data';
import concatWpJs from './concat-wp';

export function buildJs(done) {
  // TODO : review if --dev still required, since au run --watch now works as expected
  if (CLIOptions.hasFlag('dev')) {
    return gulp.series(
      readProjectConfiguration,
      gulp.parallel(
        transpile,
        livesiteJS,
        processMarkup
      ),
      writeBundles,
      concatWpJs,
      copyJsFilesToPL
    )(done);
  }
  return gulp.series(
    readProjectConfiguration,
    gulp.parallel(
      lintJS,
      transpile,
      livesiteJS,
      processMarkup,
      processAssets
    ),
    writeBundles,
    concatWpJs,
    copyJsFilesToPL
  )(done);
}

export function buildDocs(done) {
  return gulp.series(
    readProjectConfiguration,
    processDocs
  )(done);
}

export function buildAll(done) {
  // TODO : review if --dev still required, since au run --watch now works as expected
  if (CLIOptions.hasFlag('js') || CLIOptions.hasFlag('dev')) {
    return buildJs(done);
  } else if (CLIOptions.hasFlag('docs')) {
    return gulp.series(
      readProjectConfiguration,
      gulp.parallel(
        processDocs,
        transpile,
        processMarkup,
        processAssets
      ),
      writeBundles
    )(done);
  } else if (CLIOptions.hasFlag('data')) {
    return gulp.series(
            readProjectConfiguration,
            copyDataToPL
    )(done);
  }
  return gulp.series(
    cleanAssets,
    readProjectConfiguration,
    gulp.parallel(
      processDocs,
      lintJS,
      transpile,
      livesiteJS,
      processMarkup,
      processAssets
    ),
    writeBundles,
    concatWpJs,
    copyJsFilesToPL,
    copyDataToPL
  )(done);
}

export default function buildDefault(done) {
  return buildAll(done);
}

function readProjectConfiguration() {
  return build.src(project);
}

function writeBundles() {
  return build.dest();
}