Basic attempt at a grunt file that concatenates and minifies CSS (from LESS) and JavaScript into a folder based upon the given version label.

grunt.js

var path = require("path");

module.exports = function(grunt) {
  grunt.initConfig({    
    less: {
      options: {
        yuicompress : true
      },
      desktop : {
        files: {
          '<%= grunt.option(\"feature\") %>/styles/desktop/global.min.css' : 'styles/desktop/less/global.less'
        }
      },
      mobile : {
        files: {
          '<%= grunt.option(\"feature\") %>/styles/mobile/global.min.css' : 'styles/mobile/less/global.less'
        }
      }
    },
    uglify : {
      desktop: {
        options : {
          compress : true
        },  
        files: {
          '<%= grunt.option(\"feature\") %>/scripts/desktop/common.min.js' : [
            'scripts/desktop/main.js', 
            'scripts/desktop/util.js', 
            'scripts/desktop/zero.js', 
          ]
        }
      },
      mobile : {
        files: {
          '<%= grunt.option(\"feature\") %>/scripts/mobile/common.min.js' : 'scripts/mobile/main.js',
        }
      }
    },
    watch : {
      scripts : {
        files : ['**/*.js'],
        tasks : ['uglify']
      },
      styles : {
        files : ['**/*.less'],
        tasks : ['less']
      }
    }
  });

  // There's probably a better way of doing this. 
  // I needed my assets to be published to versioned folders.
  var feature = grunt.option('feature');
  if(typeof feature  === 'undefined') {
    grunt.fail.fatal('Please supply a version number.');
  } else {
    grunt.option('feature', path.join('../', grunt.option('feature')));
  }

  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-less');

  // Register a default task.
  grunt.registerTask('default', ['uglify', 'less']);
};