Titanium + Babel + Alloy

Gruntfile.js

var path = require('path');

module.exports = function(grunt) {
  require('load-grunt-tasks')(grunt);
  grunt.initConfig({
    pkg: grunt.file.readJSON("package.json"),
    babel: {
      options: {
        sourceMap: true,
        stage: 0
      },
      dist: {
        files: [{
          "expand": true,
          "cwd": "src",
          "src": ["**/*.js"],
          "dest": "app/",
          "ext": ".js"
       }]
     }
    },
    copy: {
      all: {
       files: [
          {expand: true, cwd: "src" , src: ['**/*', '!**/*.js'], dest: 'app/'},
        ]
      },
    },
    alloy: {
      compile: {
        options: {
          command: 'compile',
          platform: 'ios',
          outputPath: './'
        }
      } 
    },
    tishadow: {
      options: {
        projectDir: './',
        update: true,
        withAlloy: true,
      },
      run: {
        command: 'run',
        options: {
          alloy: {
            platform: [ 'ios' ]
          }
        }
      }
    },
    watch: {
      all: {
        files: ['src/**/*.js'],
        tasks: ['babel', 'tishadow:run']
      }
    }
  });
  grunt.registerTask('default', ['babel', 'copy', 'alloy']);
};