gulpfile.js

// include gulp
var gulp = require('gulp');

// include plug-ins
var jshint          = require('gulp-jshint'),
    stripDebug      = require('gulp-strip-debug'),
    uglify          = require('gulp-uglify'),
    autoprefix      = require('gulp-autoprefixer'),
    minifyCSS       = require('gulp-minify-css'),
    rename          = require('gulp-rename'),
    includejs       = require('gulp-include'),
    importcss       = require('gulp-cssimport'),
    sass            = require('gulp-sass');
 
var sources = {
    sass:              './app/assets/scss/*.scss',
    javascript:        './app/assets/js/*.js'
};

var targets = {
    css:    './public/css',
    js:     './public/js'
};

// JS hint task
gulp.task('jshint', function() {
    gulp.src('./app/assets/js/*.js')
        .pipe(jshint())
        .pipe(jshint.reporter('default'));
});

// JS concat, strip debugging and minify
gulp.task('scripts', function() {
    gulp.src(sources.javascript)
        .pipe(includejs())
        .pipe(gulp.dest(targets.js))
        .pipe(stripDebug())
        .pipe(uglify('compress'))
        .pipe(rename(function (path) { path.basename += '.min'; }))
        .pipe(gulp.dest(targets.js));
});

gulp.task('fonts', function () {
    gulp.src('app/bower_components/bootstrap-sass/vendor/assets/fonts/bootstrap/*')
        .pipe(gulp.dest('dist/bower_components/bootstrap-sass/vendor/assets/fonts/bootstrap'));
});

// compile CSS
gulp.task('sass', function() {

    gulp.src([
            './app/assets/scss/app.scss', 
            './app/assets/scss/app-admin.scss'
        ])
        .pipe(importcss())
        .pipe(sass({
            includePaths: [
                './bower_components/bootstrap-sass-official/vendor/assets/stylesheets', 
                './bower_components'
            ],
            errLogToConsole: true
        }))

        .pipe(autoprefix('last 2 versions'))
        .pipe(gulp.dest(targets.css))
        .pipe(minifyCSS())
        .pipe(rename(function (path) { path.basename += '.min'; }))
        .pipe(gulp.dest(targets.css));
});

gulp.task('watch', function () {
    gulp.watch('./app/assets/scss/**/*.scss', ['sass']);
    gulp.watch('./app/assets/js/*.js', ['scripts', 'jshint']);
});

gulp.task('default', ['sass', 'scripts', 'jshint', 'watch']);

package.json

{
  "devDependencies": {
    "gulp": "~3.8.5",
    "gulp-rename": "~1.2.0",
    "gulp-strip-debug": "~0.3.0",
    "gulp-changed": "~0.4.0",
    "gulp-minify-css": "~0.3.6",
    "gulp-uglify": "~0.3.1",
    "gulp-jshint": "~1.6.4",
    "gulp-autoprefixer": "0.0.8",
    "gulp-concat": "~2.2.0",
    "gulp-imagemin": "~0.6.1",
    "gulp-include": "~0.2.3",
    "gulp-cssimport": "~1.2.2",
    "gulp-util": "~2.2.19",
    "gulp-sass": "~0.7.2"
  }
}