Gruntfile.js

module.exports = function (grunt) {
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        concat: {
            css: {
                src: [
                    'css/*'
                ],
                dest: 'combined.css'
            },
            js: {
                src: [
                    'js/*'
                ],
                dest: 'combined.js'
            }
        },
        cssmin: {
            css: {
                src: 'combined.css',
                dest: 'combined.min.css'
            }
        },
        uglify: {
        	js: {
			    files: grunt.file.expandMapping(['js/src/*.js'], '', {
			        rename: function(destBase, destPath) {
			            return destPath.replace('src/', '').replace('.js', '.min.js');
			        }
			    })
			},
            jsadmin: {
                files: grunt.file.expandMapping(['admin/js/src/*.js', 'admin/js/src/plugins/**/*.js'], '', {
                    rename: function(destBase, destPath) {
                        return destPath.replace('src/', '').replace('.js', '.min.js');
                    }
                })
            },
        },
		cssmin: {
			css: {
				files: grunt.file.expandMapping(['css/src/*.css'], '', {
				    rename: function(destBase, destPath) {
				       return destPath.replace('src/', '').replace('.css', '.min.css');
				    }
				})
			},
            cssadmin: {
                files: grunt.file.expandMapping(['admin/css/src/*.css', 'admin/css/src/plugins/**/*.css'], '', {
                    rename: function(destBase, destPath) {
                       return destPath.replace('src/', '').replace('.css', '.min.css');
                    }
                })
            }
		}
    });

    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-cssmin');

    grunt.registerTask('default', [
        'uglify:jsadmin', 
        //'cssmin:cssadmin'
    ]);
};