Basic gulpfile.

gulpfile.js

var gulp = require("gulp");
var gutil = require("gulp-util");
var compass = require("gulp-compass");
var coffee = require("gulp-coffee");
var imagemin = require("gulp-imagemin");
var concat = require("gulp-concat");
var minifyCSS = require('gulp-minify-css');
var path = require('path');

gulp.task("compass", function(){
  gulp.src("public/assets/site/stylesheets/scss/*.scss")
    .pipe(compass({
      css: "public/assets/site/stylesheets/css",
      sass: "public/assets/site/stylesheets/scss",
      style: "compressed"
    }))
  .pipe(gulp.dest("public/assets/site/temp"));
});

gulp.task("images", function() {
  gulp.src("public/assets/site/images/src/*.png")
  .pipe(imagemin())
  .pipe(gulp.dest("public/assets/site/images"))
});

gulp.task("coffee", function() {
  gulp.src("public/assets/site/javascripts/coffee/*.coffee")
  .pipe(coffee().on("error", gutil.log))
  .pipe(concat("all.js"))
  .pipe(gulp.dest("public/assets/site/javascripts/js"))
});

gulp.task("watch", function(){
  gulp.watch("public/assets/site/stylesheets/scss/**/*.scss", ["compass"]);
  gulp.watch("public/assets/site/javascripts/coffee/*.coffee", ["coffee"]);
});


gulp.task("default", ["coffee", "compass", "watch"]);