GruntJS for development and production.

config.production.rb

css_dir = "public/css"
sass_dir = "sass"
images_dir = "public/img"
javascripts_dir = "public/js"
fonts_dir = "public/fonts"

http_path = "/"
http_images_path = "http://konorogames.konorogames.netdna-cdn.com"
http_fonts_path = "../fonts"
http_generated_images_path = http_images_path

output_style = :compressed

config.rb

css_dir = "public/css"
sass_dir = "sass"
images_dir = "public/img"
javascripts_dir = "public/js"
fonts_dir = "public/fonts"

http_path = "/"
http_images_path = "../img"
http_fonts_path = "../fonts"
http_generated_images_path = http_images_path

sass_options = { :sourcemap => true }
output_style = :expanded

Gruntfile.js

module.exports = function(grunt) {

    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        compass: {
            files: [
                'sass/**/*.scss'
            ]
            clean: {
                options: {
                    clean: true
                }
            },
            dev: {
                options: {
                    config: 'config.rb'
                }
            },
            prod: {
                options: {
                    config: 'config.production.rb'
                }
            }
        },
        },
        handlebars: {
            compile: {
                files: {
                    "public/js/templates/templates.js": "public/js/templates/*.hbs"
                },
                options: {
                    namespace: 'Handlebars.templates',
                    processName: function(filePath) {
                        var pieces = filePath.split("/");
                        return pieces[pieces.length - 1].replace('.hbs', ''); 
                    }
                }
            }
        },
        qunit: {
            files: ['test/unit/**/*.html']
        },
        qunit_junit: {
            options: {
                // Task-specific options go here.
                dest: '_build/test-reports',
                namer: function (url) {
                    var match = url.match(/test\/unit\/(.*)$/);
                    return match[1].replace(/\//g, '.').replace('.index.html', '');
                }
            }
        },
        jshint: {
            files: [
                'gruntfile.js', 
                'public/js/core/*.js'
            ],
            options: {
                // options here to override JSHint defaults
                globals: {
                    jQuery: true,
                    console: true,
                    module: true,
                    document: true
                }
            }
        },
        watch: {
            handlebars: {
                files: ["public/js/templates/*.hbs"],
                tasks: ['handlebars']
            },
            compass: {
                files: ['<%= compass.files %>'],
                tasks: ['compass:dev'],
                options: {
                    livereload: true,
                },
            },
            test: {
                files: ['<%= jshint.files %>'],
                tasks: ['jshint']
            }
        },
        uglify: {
            options: {
                banner: '/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy HH:MM") %> */\n'
            },
            dist: {
                files: {
                    'public/js/<%= pkg.name %>.min.js': [
                        'public/js/library/jquery.js',
                        'public/js/library/handlebars.runtime.js',
                        'public/js/library/bootstrap.js',
                        'public/js/core/application.js',
                        'public/js/templates/templates.js'
                    ]
                }
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-compass');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-qunit');
    grunt.loadNpmTasks('grunt-contrib-handlebars')
    grunt.loadNpmTasks('grunt-qunit-junit');

    grunt.registerTask('test', ['jshint', 'qunit_junit', 'qunit']);
    grunt.registerTask('default', ['compass:dev', 'jshint', 'qunit', 'handlebars']);
    grunt.registerTask('compass-dev', ['compass:clean', 'compass:dev']);
    grunt.registerTask('compass-prod', ['compass:clean', 'compass:prod']);
    grunt.registerTask('production', ['compass:clean', 'compass:prod', 'handlebars', 'uglify']);

};

package.json

{
  "name": "my project name",
  "description": "My project description",
  "version": "0.0.1"
}