Base Gulp

gulpfile.js

var gulp = require('gulp');
var autoprefixer = require('gulp-autoprefixer'),
	concat = require('gulp-concat'),
	filter = require('gulp-filter'),
  gulpif = require('gulp-if'),
	minify = require('gulp-minify-css'),
	plumber = require('gulp-plumber'),
	rename = require('gulp-rename'),
	sass = require('gulp-sass')
  uglify = require('gulp-uglify');

var paths = {
    sass: ['scss/**/*.scss'],
    scripts: [
        'scripts/lib/**/*.js',
        'scripts/src/**/!(main)*.js',
        'scripts/src/main.js' // order matters, use main.js to boot the system
    ]
};

gulp.task('styles', function() {
    return gulp.src(paths.sass)
        .pipe(plumber())
        .pipe(sass({errLogToConsole: true}))
        .pipe(autoprefixer())
        .pipe(gulp.dest('css'))
        .pipe(rename('styles.min.css'))
        .pipe(minify())
        .pipe(gulp.dest('css'));
});

gulp.task('scripts', function() {
    return gulp.src(paths.scripts)
        .pipe(concat('scripts.js'))
        .pipe(gulp.dest('scripts'))
        .pipe(uglify())
        .pipe(rename('scripts.min.js'))
        .pipe(gulp.dest('scripts'));
});

gulp.task('watch', function() {
    gulp.watch(paths.sass, function() {
        gulp.start('styles');
    });
    gulp.watch(paths.scripts, function() {
        gulp.start('scripts');
    });
});

gulp.task('build', function() {
   gulp.start('styles');
   gulp.start('scripts');
});

pakcage.json

{
  "devDependencies": {
    "gulp": "~3.5.6",
    "gulp-sass": "~0.7.1",
    "gulp-autoprefixer": "0.0.6",
    "gulp-filter": "~0.3.1",
    "gulp-minify-css": "~0.3.0",
    "gulp-plumber": "~0.5.6",
    "gulp-concat": "~2.2.0",
    "gulp-rename": "~1.2.0",
    "gulp-uglify": "~0.2.1",
    "gulp-if": "0.0.5"
  }
}