nest/tools/gulp/tasks/packages.ts

import { source, packagePaths } from '../config';
import { task, watch, series, dest } from 'gulp';
import { createProject } from 'gulp-typescript';
import * as sourcemaps from 'gulp-sourcemaps';
import * as log from 'fancy-log';

// Has to be a hardcoded object due to build order
const packages = {
  'common': createProject('packages/common/tsconfig.json'),
  'core': createProject('packages/core/tsconfig.json'),
  'microservices': createProject('packages/microservices/tsconfig.json'),
  'websockets': createProject('packages/websockets/tsconfig.json'),
  'testing': createProject('packages/testing/tsconfig.json'),
  'platform-express': createProject('packages/platform-express/tsconfig.json'),
  'platform-fastify': createProject('packages/platform-fastify/tsconfig.json'),
  'platform-socket.io': createProject(
    'packages/platform-socket.io/tsconfig.json',
  ),
  'platform-ws': createProject('packages/platform-ws/tsconfig.json'),
};

const modules = Object.keys(packages);

const distId = process.argv.indexOf('--dist');
const dist = distId < 0 ? source : process.argv[distId + 1];

/**
 * Watches the packages/* folder and
 * builds the package on file change
 */
function defaultTask() {
  log.info('Watching files..');
  modules.forEach(packageName => {
    watch(
      [`${source}/${packageName}/**/*.ts`, `${source}/${packageName}/*.ts`],
      series(packageName),
    );
  });
}

/**
 * Builds the given package
 * @param packageName The name of the package
 */
function buildPackage(packageName: string) {
  return packages[packageName]
    .src()
    .pipe(packages[packageName]())
    .pipe(dest(`${dist}/${packageName}`));
}

/**
 * Builds the given package and adds sourcemaps
 * @param packageName The name of the package
 */
function buildPackageDev(packageName: string) {
  return packages[packageName]
    .src()
    .pipe(sourcemaps.init())
    .pipe(packages[packageName]())
    .pipe(
      sourcemaps.mapSources(
        (sourcePath: string) => './' + sourcePath.split('/').pop(),
      ),
    )
    .pipe(sourcemaps.write('.', {}))
    .pipe(dest(`${dist}/${packageName}`));
}

modules.forEach(packageName => {
  task(packageName, () => buildPackage(packageName));
  task(`${packageName}:dev`, () => buildPackageDev(packageName));
});

task('common:dev', series(modules.map(packageName => `${packageName}:dev`)));
task('build', series(modules));
task('build:dev', series('common:dev'));
task('default', defaultTask);