gulpfile.js

require("dotenv").load({ silent: true });

var gulp = require("gulp");
var sass = require("gulp-sass");
var minifyCss = require("gulp-minify-css");
var concat = require("gulp-concat");
var sourcemaps = require("gulp-sourcemaps");
var uglify = require("gulp-uglify");
var ngAnnotate = require("gulp-ng-annotate");

var environment = process.env.NODE_ENV;

var nodemon = require("gulp-nodemon");

function swallowError(error) {
  //If you want details of the error in the console
  console.log(error.toString());
  this.emit("end");
}

gulp.task("default", function() {
  console.log("yo. use gulp watch or something");
});

gulp.task("js", function() {
  if (environment !== "dev") {
    // Minify for non-development
    gulp
      .src(["app/legacy/src/**/*.js", "app/legacy/views/**/*.js"])
      .pipe(sourcemaps.init())
      .pipe(concat("app.js"))
      .pipe(ngAnnotate())
      .on("error", swallowError)
      .pipe(uglify())
      .pipe(gulp.dest("app/legacy/build"));
  } else {
    gulp
      .src(["app/legacy/src/**/*.js", "app/legacy/views/**/*.js"])
      .pipe(sourcemaps.init())
      .pipe(concat("app.js"))
      .pipe(ngAnnotate())
      .on("error", swallowError)
      .pipe(sourcemaps.write())
      .pipe(gulp.dest("app/legacy/build"));
  }
});

gulp.task("sass", function() {
  gulp
    .src("app/legacy/stylesheets/site.scss")
    .pipe(sass())
    .on("error", sass.logError)
    .pipe(minifyCss())
    .pipe(gulp.dest("app/legacy/build"));
});

gulp.task("build", ["js", "sass"], function() {
  // Yup, build the js and sass.
});

gulp.task("watch", ["js", "sass"], function() {
  gulp.watch("app/legacy/src/**/*.js", ["js"]);
  gulp.watch("app/legacy/views/**/*.js", ["js"]);
  gulp.watch("app/legacy/stylesheets/**/*.scss", ["sass"]);
});

gulp.task("server", ["watch"], function() {
  nodemon({
    script: "app.js",
    env: { NODE_ENV: process.env.NODE_ENV || "DEV" },
    watch: ["app/server"]
  });
});