Gruntfile.js

module.exports = function( grunt ) {
  'use strict';
  //
  // Grunt configuration:
  //
  // https://github.com/cowboy/grunt/blob/master/docs/getting_started.md
  //
  grunt.loadNpmTasks('grunt-recess');

  grunt.initConfig({

    // Project configuration
    // ---------------------

    // LESS compilation
    recess: {
      dist: {
        src: 'app/styles/main.less',
        dest: 'temp/styles/main.css',
        options: {
          compile: true
        }
      }
    },

    // generate application cache manifest
    manifest:{
      dest: ''
    },

    // headless testing through PhantomJS
    mocha: {
      all: ['test/**/*.html']
    },

    // default watch configuration
    watch: {
      recess: {
        files: 'app/styles/**/*.less',
        tasks: 'recess reload'
      },
      reload: {
        files: [
          'app/*.html',
          'app/styles/**/*.css',
          'app/scripts/**/*.js',
          'app/images/**/*'
        ],
        tasks: 'reload'
      }
    },

    // default lint configuration, change this to match your setup:
    // https://github.com/cowboy/grunt/blob/master/docs/task_lint.md#lint-built-in-task
    lint: {
      options: {
        // specifying JSHint options and globals
        options: {
          curly: true,
          eqeqeq: true,
          immed: true,
          latedef: true,
          newcap: true,
          noarg: true,
          sub: true,
          undef: true,
          boss: true,
          eqnull: true,
          browser: true,
          node: true
        },
        globals: {
          jQuery: true,
          require: true,
          define: true
        }
      },
      files: [
        'Gruntfile.js',
        'app/scripts/**/*.js',
        'spec/**/*.js'
      ]
    },

    // Build configuration
    // -------------------

    // the staging directory used during the process
    staging: 'temp',
    // final build output
    output: 'dist',

    mkdirs: {
      staging: 'app/'
    },

    server: {
      app: 'clean recess watch'
    },

    // Below, all paths are relative to the staging directory, which is a copy
    // of the app/ directory. Any .gitignore, .ignore and .buildignore file
    // that might appear in the app/ tree are used to ignore these values
    // during the copy process.

    // concat css/**/*.css files, inline @import, output a single minified css
    css: {
      'styles/main.css': ['styles/**/*.css']
    },

    // renames JS/CSS to prepend a hash of their contents for easier
    // versioning
    rev: {
      js: 'scripts/**/*.js',
      css: 'styles/**/*.css',
      img: ''
    },

    // usemin handler should point to the file containing
    // the usemin blocks to be parsed
    'usemin-handler': {
      html: 'index.html'
    },

    // update references in HTML/CSS to revved files
    usemin: {
      html: ['index.html'],
      css: ['styles/**/*.css']
    },

    // HTML minification
    html: {
      files: ['**/*.html']
    },

    // Optimizes JPGs and PNGs (with jpegtran & optipng)
    img: {
      dist: 'images/**'
    },

    // rjs configuration. You don't necessarily need to specify the typical
    // `path` configuration, the rjs task will parse these values from your
    // main module, using http://requirejs.org/docs/optimization.html#mainConfigFile
    //
    // name / out / mainConfig file should be used. You can let it blank if
    // you're using usemin-handler to parse rjs config from markup (default
    // setup)
    rjs: {
      // no minification, is done by the min task
      optimize: 'none',
      baseUrl: 'app/scripts',
      wrap: true,
      name: 'main'
    },

    // While Yeoman handles concat/min when using
    // usemin blocks, you can still use them manually
    concat: {
      dist: ''
    },

    min: {
      dist: ''
    }
  });

  // usemin:post:* are the global replace handlers, they delegate the regexp
  // replace to the replace helper.
  grunt.registerHelper('usemin:post:html', function(content) {
    grunt.log.verbose.writeln('Update the HTML to reference our concat/min/revved script files');
    content = grunt.helper('replace', content, /<script.+src=['"](.+)["'][\/>]?><[\\]?\/script>/gm);

    grunt.log.verbose.writeln('Update the HTML with the new css filenames');
    content = grunt.helper('replace', content, /<link[^\>]+href=['"]([^"']+)["']/gm);

    grunt.log.verbose.writeln('Update the HTML with anchors images');
    content = grunt.helper('replace', content, /<a[^\>]+href=['"]([^"']+)["']/gm);

    return content;
  });

  grunt.registerHelper('usemin:post:css', function(content) {
    return content;
  });

  // Alias the `test` task to run the `mocha` task instead
  grunt.registerTask('test', 'lint mocha');
  grunt.registerTask('test-server', 'grunt-server');
  grunt.registerTask('build', 'intro clean recess mkdirs usemin-handler concat css min img rev usemin copy time');
  grunt.registerTask('build:minify', 'intro clean recess mkdirs usemin-handler concat css min img rev usemin html:compress copy time');
};