My gulpfile

gistfile1.txt

var gulp = require('gulp'),
    sass = require('gulp-ruby-sass'),
    autoprefixer = require('gulp-autoprefixer'),
    minifycss = require('gulp-minify-css'),
    jshint = require('gulp-jshint'),
    uglify = require('gulp-uglify'),
    imagemin = require('gulp-imagemin'),
    rename = require('gulp-rename'),
    clean = require('gulp-clean'),
    concat = require('gulp-concat'),
    notify = require('gulp-notify'),
    cache = require('gulp-cache'),
    livereload = require('gulp-livereload'),
    lr = require('tiny-lr'),
    server = lr();

gulp.task('styles', function() {
  return gulp.src('app/webroot/sass/styles.scss')
    .pipe(sass({ style: 'expanded' }))
    .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
    .pipe(gulp.dest('app/webroot/css'))
    .pipe(rename({suffix: '.min'}))
    .pipe(minifycss())
    .pipe(gulp.dest('dist/assets/css'))
    .pipe(livereload(server))
    .pipe(notify({ message: 'Styles task complete' }));
});

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

gulp.task('watch', function() {

  // Watch .scss files
  gulp.watch('app/webroot/sass/*.scss', ['styles']);

  // Watch .js files
  // gulp.watch('src/scripts/**/*.js', ['scripts']);

  // Watch image files
  // gulp.watch('src/images/**/*', ['images']);

});

gulp.task('watch', function() {

  // Listen on port 35729
  server.listen(35729, function (err) {
    if (err) {
      return console.log(err)
    };

    // Watch tasks go inside inside server.listen()

  });

});