grunt-betterCompiler

module.exports = function(grunt) {

    // Project configuration.
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        // CONFIG ===================================/

        watch: {
            compass: {
                files: ['assets/**/*.{scss,sass}'],
                tasks: ['compass:dist']
            },
            js: {
                files: ['assets/**/*.js'],
                tasks: ['uglify']
            },
            img: {
                files: ['assets/**/*.{png,jpg,jpeg,gif}'],
                tasks: ['imagemin']
            }
        },

        compass: {
            dist: {
                options: {
                    config: 'config/config.rb'
                }
            }
        },

        uglify: {
            all: {
                files: {
                    'assets/js/min/main.min.js': [
                        'assets/js/libs/jquery.js',
                        'assets/js/main.js'
                    ]
                }
            }
        },

        imagemin: {
            dist: {
                options: {
                    optimizationLevel: 3
                },
                files: {
                    'assets/img/img.png': 'assets/img/opt/img.png', // 'destination': 'source'
                    'assets/img/img.jpg': 'assets/img/opt/img.jpg',
                    'assets/img/img.gif': 'assets/img/opt/img.gif'
                }
            }
        }


});

    // DEPENDENT PLUGINS =========================/

    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-compass');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-imagemin');

    // TASKS =====================================/

    grunt.registerTask('default', [
        'compass:dist',
        'uglify',
        'imagemin',
        'watch'
    ]);

};