My gulp file

gulpfile.js

var gulp = require('gulp'),
    plug = require("gulp-load-plugins")({lazy:false})
    wiredep = require('wiredep').stream;

    gulp.task('bower', function () {
      gulp.src('app/index.html')
        .pipe(wiredep())
        .pipe(gulp.dest('app/'));
    });

 
    gulp.task('build', function() {
      gulp.src('app/index.html')
        .pipe(plug.usemin({
          css: [ plug.minifyCss(),'concat'],
          css1: [ plug.autoprefixer(),plug.minifyCss(),'concat'],
          js: [plug.uglify()],
          js1: [plug.uglify()] // will add rev() if needed
        }))
        .pipe(gulp.dest('dist/'));
    });


  gulp.task('watch', function() {
    gulp.watch('app/bower_components/**/*', ['bower']);  
    gulp.watch(['app/index.html','app/js/**/*.js','app/css/**/*.css'], ['build']);  
  });


  gulp.task('default', ['watch', 'bower', 'build']);

package.json

{
  "devDependencies": {
    "gulp": "^3.8.7",
    "gulp-angular-templatecache": "^1.3.0",
    "gulp-autoprefixer": "0.0.10",  
    "gulp-load-plugins": "^0.6.0",
    "gulp-minify-css": "^0.3.7",
    "gulp-rev": "^1.1.0",
    "gulp-uglify": "^1.0.0",
    "gulp-usemin": "^0.3.8",
    "gulp-util": "^3.0.1",
    "gulp-watch": "^0.7.0",    
    "wiredep": "^1.8.5"
  },
  "dependencies": {}
}