My Gruntfile.js

Gruntfile.js

module.exports = function(grunt) {
  // store a var to the process cwd (current working directory)
  var cwd = process.cwd();

  // use the time plugin for build completion time
  require('time-grunt')(grunt);

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

    dirs: {
      src:  'www/addons/shared_addons/themes/stikoo/src',
      dist: 'www/addons/shared_addons/themes/stikoo/build',
      ops:  'front-end-ops'
    },

    // watch uses the cwd var to initiate the watch tasks
    watch: {
      options: {
        cliArgs: ['--gruntfile', require('path').join(cwd, 'Gruntfile.js')],
      },
      css: {
        files: [
          '<%= dirs.src %>/sass/**/*.scss',
        ],
        tasks: ['compass']
      },
      js: {
        files: [
          '<%= dirs.src %>/js/polyfill/*.js',
          '<%= dirs.src %>/js/libs/*.js',
          '<%= dirs.src %>/js/script.js',
          '<%= dirs.ops %>/Gruntfile.js',
          '!**/node_modules/**'
        ],
        tasks: ['jshint', 'concat:dev']
      },
      img: {
        files: [
          '<%= dirs.src %>/img/*',
        ],
        tasks: ['copy:img']
      }
    },

    clean: ['<%= dirs.dist %>'],

    copy: {
      img: {
        cwd: '<%= dirs.src %>/img/',
        expand: true,
        src: '*',
        dest: '<%= dirs.dist %>/img/',
        filter: 'isFile'
      },
    },

    compass: {
      dev: {
        options: {
          httpPath: "www/",
          cssPath: "<%= dirs.dist %>/css",
          sassPath: "<%= dirs.src %>/sass",
          imagesPath: "<%= dirs.src %>/img",
          javascriptsPath: "<%= dirs.src %>/js",
          cacheDir: '<%= dirs.ops %>/.sass-cache'
        }
      }
    },

    cssmin: {
      add_banner: {
        options: {
          banner: '/*! <%= pkg.name %> - ' + '<%= grunt.template.today("yyyy-mm-dd") %> */'
        },
        files: {
          '<%= dirs.dist %>/css/style.css': ['<%= dirs.dist %>/css/style.css']
        }
      }
    },

    jshint: {
      files: ['<%= dirs.ops %>/Gruntfile.js', '<%= dirs.src %>/js/script.js'],
      options: {
        "strict": false,

        "globals": {
          "jQuery": true,
          "console": true
        }

      },
    },

    // concat without minification on dev
    concat: {
      options: {
        stripBanners: true,
        banner: '/*! <%= pkg.name %> - ' + '<%= grunt.template.today("yyyy-mm-dd") %> */'
      },

      dev: {
        files: {
          '<%= dirs.dist %>/js/polyfill.js': ['<%= dirs.src %>/js/polyfill/respond.js', '<%= dirs.src %>/js/polyfill/html5shiv.js'],
          '<%= dirs.dist %>/js/script.js': ['<%= dirs.src %>/js/libs/modernizr.js', '<%= dirs.src %>/js/libs/jquery.js', '<%= dirs.src %>/js/script.js'],
        }
      }
    },

    // concat with minification on dist
    uglify: {
      options: {
        banner: '/*! <%= pkg.name %> - ' + '<%= grunt.template.today("dd-mm-yyyy") %> */',
        mangle: false
      },
      dist: {
        files: {
          '<%= dirs.dist %>/js/polyfill.js': ['<%= dirs.src %>/js/polyfill/respond.js', '<%= dirs.src %>/js/polyfill/html5shiv.js'],
          '<%= dirs.dist %>/js/script.js': ['<%= dirs.src %>/js/libs/modernizr.js', '<%= dirs.src %>/js/libs/jquery.js', '<%= dirs.src %>/js/script.js'],
        }
      }
    },

    imagemin: {                          // Task
      dynamic: {                         // Another target
        files: [{
          expand: true,                  // Enable dynamic expansion
          cwd: '<%= dirs.src %>/img/',   // Src matches are relative to this path
          src: ['**/*.{png,jpg,gif}'],   // Actual patterns to match
          dest: '<%= dirs.dist %>/img/'  // Destination path prefix
        }]
      }
    }

  });

  // Register the tasks.
  grunt.loadNpmTasks('grunt-contrib-compass');
  grunt.loadNpmTasks('grunt-contrib-copy');
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-contrib-concat');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-contrib-cssmin');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-imagemin');

  // I have grunt in a sub-directory, so to avoid problems with some
  // grunt tasks, we instruct grunt to run from the root directory
  // this is why we also have to pass the watch task a path to the grunt file
  grunt.file.setBase('../');

  // default tasks
  grunt.registerTask('default', ['clean', 'compass', 'concat', 'copy:img', 'watch']);

  // build development version
  grunt.registerTask('build:dev', ['clean', 'compass', 'concat', 'jshint', 'copy:img']);

  // build distribution version
  grunt.registerTask('build:dist', ['clean', 'compass', 'cssmin', 'jshint', 'uglify', 'imagemin']);

};