Gruntfile.js

// Whole Gruntfile.js so far
module.exports = function(grunt) {

    // 1. All configuration goes here
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        banner: '/*\n' +
          ' * <%= pkg.name %> <%= pkg.version %>\n' +
          ' * <%= pkg.description %>\n' +
          ' *\n' +
          ' * <%= pkg.homepage %>\n' +
          ' *\n' +
          ' * Copyright 2013-<%= grunt.template.today("yyyy") %>, <%= pkg.author %>\n' +
          ' * Released on: <%= grunt.template.today("mmmm d, yyyy") %>\n' +
          '*/\n',
        jshint: {
            // define the files to lint
            files: ['gruntfile.js', 'js/*.js', '!js/jquery*.js'],
            // configure JSHint (documented at http://www.jshint.com/docs/)
            options: {
                // more options here if you want to override JSHint defaults
                globals: {
                    jQuery: true,
                    console: true,
                    module: true
                }
            }
        },
        clean: {
            src: ["dist"],
        },
        uglify: {
            options: {
               report: 'gzip',
               compress: true,
               banner: '<%= banner %>',
            },
            mangle: {toplevel: false},
            squeeze: {dead_code: false},
            codegen: {quote_keys: true},
            dist: {
                files: {
                    '<%= pkg.dirs.js.dist.min %>':'<%= pkg.dirs.js.dist.src %>'
                }
            }
        },
        compress: {
            main: {
              options: {
                mode: 'gzip',
                level: 9
              },
              files: [
                {expand: true, cwd: 'dist/', src: ['app.js', 'style.css'], dest: 'dist/zip/'}
              ]
            }
        },
        concat: {
            js: {
                options: {
                    banner: '<%= banner %>',
                    stripBanners: true,
                    separator: ';\n'
                },
                src:  '<%= pkg.dirs.js.dev %>',
                dest: '<%= pkg.dirs.js.dist.src %>'
            },
            css:{
                options: {
                    banner: '<%= banner %>',
                    stripBanners: true,
                    separator: ' \n'
                },
                src:  '<%= pkg.dirs.css.dev %>',
                dest: '<%= pkg.dirs.css.dist.src %>'
            }
        },
        cssmin: {
            options: {
                banner: '<%= banner %>',
                stripBanners: true,
                separator: ' \n',
                keepSpecialComments: 0
            },
            dist: {
                files: {
                    '<%= pkg.dirs.css.dist.min %>':'<%= pkg.dirs.css.dist.src %>'
                }
            }
        },
        shell: {
            echo: {
                command: 'echo 1',
                options: { stdout: true, failOnError: true }
            },
            clean: {
                command: 'rm dist -r',
                options: { stdout: true, failOnError: true }
            }, 
            pull: {
                command: function(pr) {
                    return [
                        'git checkout .', //in case of any change
                        'git pull'
                    ].join('&&');
                },
                options: {
                    stdout: true,
                    failOnError: true
                }
            }, amend: {
                command: 'git commit -a --amend --no-edit',
                options: { stdout: true, failOnError: true }
            }
        }

    });
    
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-cssmin');
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-clean');
    grunt.loadNpmTasks('grunt-contrib-compress'); //gzip
    grunt.loadNpmTasks('grunt-shell'); //git commands

    grunt.registerTask('default', ['shell:pull', 'clean', 'concat:js', 'uglify', 'concat:css', 'cssmin', 'compress'])
};

package.json

{
  "name": "product_name",
  "charset": "UTF-8",
  "author": "author",
  "http_host": {
    "dev": "/^localhost$/",
    "dist": "/^productsite$/"
  },
  "dirs": {
    "font": {
      "dev": "res/fonts/",
      "dist": "res/fonts/"
    },
    "css": {
      "dev": [
        "css/bs/bootstrap.css",
        "css/bs/navbar.css",
        "css/base.css",
        "css/style.css",
        "css/morph.css",
        "css/datepicker3.css",
        "css/jquery.timepicker.css",
        "css/jquery.fancybox.css"
      ],
      "dist": {
        "src": "dist/css/style.src.css",
        "min": "dist/style.css"
      }
    },
    "js": {
      "dev": [
        "js/jquery-latest.min.js",
        "js/bootstrap.js",
        "js/packery/packery.pkgd.js",
        "js/datepicker/bootstrap-datepicker.js",
        "js/jquery.timepicker/jquery.timepicker.js",
        "js/helper.js",
        "js/d3-custom.js",
        "js/colorbrewer.js",
        "js/prefixfree.min.js",
        "js/moment.dev.min.js",
        "js/jquery.balanced-gallery.js",
        "js/jquery.lazyload/jquery.lazyload.min.js",
        "js/jquery.fancybox/jquery.fancybox.js",
        "js/general.js"
      ],
      "dist": {
        "src": "dist/js/app.src.js",
        "min": "dist/app.js"
      }
    }
  },
  "title": "Product title",
  "homepage": "product website",
  "description": "Product description",
  "version": "1.0.3",
  "devDependencies": {
    "grunt": "^0.4.5",
    "grunt-contrib-concat": "~0.3.0",
    "grunt-contrib-jshint": "~0.7.2",
    "grunt-contrib-uglify": "~0.5.0",
    "grunt-contrib-cssmin": "~0.4.1",
    "grunt-contrib-clean": "~0.4.0",
    "grunt-contrib-compress": "~0.9.1",
    "grunt-shell": "~0.5.0",
    "time-grunt": "~0.2.8",
    "rebuild": "^0.1.2"
  }
}