Gruntfile com algumas tarefas: Compass, Ugrify, Connect, Livereload, Bower Install.

Gruntfile.js

/**
 * Created by Mota on 10/08/2014.
 */

module.exports = function(grunt) {

    var mountFolder = function (connect, dir) {
        return connect.static(require('path').resolve(dir));
    };

    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        compass: {
            dist: {
                options: {
                    config: 'config.rb'
                }
            }
        },
        concat: {
            options: {
                separator: ';'
            },
            dist: {
                src: ['app/js/**/*.js'],
                dest: 'dist/<%= pkg.name %>.js'
            }
        },
        uglify: {
            options: {
                banner: '/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy") %> */\n'
            },
            dist: {
                files: {
                    'dist/<%= pkg.name %>.min.js': ['<%= concat.dist.dest %>']
                }
            }
        },
        jshint: {
            files: ['Gruntfile.js', 'app/js/**/*.js', 'test/**/*.js'],
            options: {
                // options here to override JSHint defaults
                globals: {
                    jQuery: true,
                    console: true,
                    module: true,
                    document: true
                }
            }
        },
        bower: {
            install: {
                options: {
                    targetDir: "./app/components",
                    layout: "byComponent"
                }
            }
        },
        connect: {
            server: {
                options: {
                    port: 8000,
                    base: 'app',
                    hostname: 'localhost',
                    livereload: true,
                    open: true,
                    middleware: function (connect) {
                        return [
                            require('connect-livereload')(),
                            mountFolder(connect, '.tmp'),
                            mountFolder(connect, 'app')
                        ];
                    }
                }
            }
        },
        open: {
            all: {
                path: 'http://localhost:<%= connect.server.options.port %>'
            }
        },
        watch: {
            dev: {
                files: ['./app/**/*'],
                tasks:[],
                options: {
                    livereload: true
                }
            },
            style: {
                files: ['./app/sass/**/*.scss'],
                tasks: ['compass']
            }
        }
    });

    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-compass');
    grunt.loadNpmTasks('grunt-contrib-connect');
    grunt.loadNpmTasks('grunt-open');
    grunt.loadNpmTasks('grunt-bower-task');

    grunt.registerTask('default', ['jshint', 'concat', 'uglify', 'compass']);
    grunt.registerTask('server', ['connect:server', 'watch:dev']);
};