gulpfile.js

'use strict'

// DEPENDENCIES
const gulp = require('gulp'),
  tslint = require('gulp-tslint'),
  ts = require('gulp-typescript'),
  nodemon = require('gulp-nodemon')

// TSLINT
gulp.task('ts-lint', () => {
  const config = { formatter: 'verbose' }
  return gulp.src(['src/**/*.ts'])
    .pipe(tslint(config))
    .pipe(tslint.report({
      reportLimit: 5
    }))
})

// COPY FILES
gulp.task('copy-files', () => {
  const COPY_FILES = ['package.json']
  return gulp.src(COPY_FILES)
    .pipe(gulp.dest('dist'))
})

// WATCH
gulp.task('watch', (done) => {
  gulp.watch('./**/*.ts')
  nodemon({
    script: 'dist/server.js',
    tasks: ['build'],
    ext: 'ts json',
    ignore: ['node_modules/', 'package.json', 'tsconfig.json']
  }).on('restart', () => {
    console.log('##################################### // ######################################')
    console.log('########################### (0/ Server restarted... ###########################')
  }).on('crash', function () {
    console.error('Application has crashed!')
  })
  done()
})

// BUILD DEFAULT
gulp.task('build', gulp.series(['ts-lint', 'copy-files'], function compiler() {
  const tsProject = ts.createProject(
    'tsconfig.json',
    { typescript: require('typescript') }
  )
  return tsProject.src()
    .pipe(tsProject())
    .js.pipe(gulp.dest('dist'))
    .on('error', (err) => {
      console.error('Build error:', err.message)
      // process.exit(1)
    })
}
))

// BUILD DEV
gulp.task('dev', gulp.series(['build', 'watch']))