gulpfile.js

var gulp = require('gulp');
var babel = require('gulp-babel');
var sass = require('gulp-sass');
var gulpSequence = require('gulp-sequence');
var concat = require('gulp-concat');
var util = require('gulp-util');
var filter = require('gulp-filter');
var env = require('gulp-env');

var webpack = require('webpack');
var webpackConfig = require('./webpack.config.js');

var child = require('child_process');

var path = {
  SRV_SRC: ['src/server/**/*', '!*~'],
  CNF_SRC: ['src/config/**/*', '!*~'],

  OUT_DIR: 'dist/'
};

var server = null;

gulp.task('default', gulpSequence(['server:build', 'config:copy', 'client:copy', 'server:spawn'], 'watch'));

gulp.task('watch', function() {
  gulp.watch(path.SRV_SRC, ['server:rebuild']);
});

gulp.task('client:copy', function() {
  gulp.src('./src/client/index.html')
    .pipe(gulp.dest(path.OUT_DIR + 'public'));

  gulp.src('./src/client/robots.txt')
    .pipe(gulp.dest(path.OUT_DIR + 'public'));

  gulp.src('./src/client/favicon.ico')
    .pipe(gulp.dest(path.OUT_DIR + 'public'));

  gulp.src('./src/client/assets/**/*')
    .pipe(gulp.dest(path.OUT_DIR + 'public/assets'));
});

gulp.task('config:copy', function() {
  gulp.src(path.CNF_SRC)
    .pipe(gulp.dest(path.OUT_DIR + '/config'));
});

gulp.task('server:rebuild', function(next) {
  gulpSequence('server:build', 'server:spawn')(next);
});

gulp.task('client:build', function(callback) {
    webpackConfig.mode = 'production';
    webpack(webpackConfig, function(err, stats) {
        if (err) throw new util.PluginError("client:build", err);
        util.log("[client:build]", stats.toString({ colors: true }));
        callback();
    });
});

gulp.task('server:build', function() {
  gulp.src(path.SRV_SRC)
    .pipe(babel({
      presets: ['es2015']
    }))
    .pipe(gulp.dest(path.OUT_DIR));
});

gulp.task('server:env-release', function() {
  env({
    vars: {
      NODE_ENV: "production"
    }
  });
});

gulp.task('server:release', ['server:env-release', 'server:build']);

gulp.task('server:spawn', function() {
  if (server) {
    server.kill();
  }

  server = child.spawn('node', ['dist/server.js']);
  server.on('close', function(code) {
    if (code === 8) {
      util.log('Error detected, waiting for changes ...');
    }
  });

  server.stdout.on('data', function(data) {
      util.log(util.colors.green(String(data).trim()));
  });

  server.stderr.on('data', function(data) {
      util.log(util.colors.red(String(data).trim()));
  });
});

process.on('exit', function() {
  if (server) {
    server.kill();
  }
});