Gruntfile.js

module.exports = function(grunt) {
  var config = {
    bower_path: 'bower_components',
    build_path: '.build',
    css: 'css',
    js: 'js',
    images: 'img',
    fonts: 'fonts',
  };
  grunt.registerTask('default', [ 'concat', 'copy', 'uglify', 'less', 'cssmin', 'clean' ]);
  grunt.initConfig({
    config: config,
    pkg: grunt.file.readJSON('package.json'),
    concat: {
      options: {
        separator: ';'
      },
      bootstrap: {
        src: [
          '<%= config.bower_path %>/bootstrap/js/*.js'
        ],
        dest: '<%= config.build_path %>/bootstrap.js'
      },
    },
    uglify: {
      options: {
        compress: true,
        mangle: false,
        warnings: false,
        preserveComments: 'some',
        banner: '/*! <%= pkg.name %> <%= grunt.template.today("mm-dd-yyyy") %> */\n'
      },
      build: {
        files: [{
            expand: true,
            src: '**/*.js',
            dest: '<%= config.js %>',
            cwd: '<%= config.build_path %>',
            ext: '.min.js'
        }]
      }
    },
    less: {
      bootstrap: {
        files: {
          "<%= config.build_path %>/bootstrap.css": "<%= config.bower_path %>/bootstrap/less/bootstrap.less"
        }
      },
    },
    copy: {
      bower: {
       files: [{
         src: '<%= config.bower_path %>/jquery/dist/jquery.min.js',
         dest: '<%= config.js %>/jquery.min.js'
       }]
      }
    },
    cssmin: {
      minify: {
        expand: true,
        cwd: '<%= config.build_path %>/',
        src: ['*.css', '!*.min.css'],
        dest: '<%= config.css %>/',
        ext: '.min.css'
      }
    },
    clean: {
      build: {
        src: [ '<%= config.build_path %>' ]
      },
    },
  });
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-copy');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-less');
  grunt.loadNpmTasks('grunt-contrib-cssmin');
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-contrib-watch');
};