Gruntfile to process Angular/Ionic sass, coffee, haml files into css, js, html

Gruntfile.js

/* Gruntfile.js
 * Grunt workflow for building AngularJS/Ionic applications.
 */

module.exports = function(grunt) {
  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
 
    coffee: {
      compile: {
        files: {
          'www/js/app.js': ['coffee/**/*.coffee']
        }
      }
    },
 
    sass: {
      dist: {
        expand: true,
        cwd: 'scss/',
        src: '**/*.scss',
        dest: 'www/css',
        ext: '.css'
      }
    },
 
    haml: {
      dist: {
        expand: true,
        cwd: 'haml/',
        src: '**/*.haml',
        dest: 'www/',
        ext: '.html'
      }
    },
 
    ngAnnotate: {
      application: {
        files: {
          'www/js/app.js': ['www/js/app.js']
        }
      }
    },
 
    watch: {
      scripts: {
        files: [
          'coffee/**/*.coffee'
        ],
        tasks: ['newer:coffee']
      },
      styles: {
        files: [
          'scss/**/*.scss'
        ],
        tasks: ['newer:sass']
      },
      views: {
        files: ['haml/**/*.haml'],
        tasks: ['newer:haml']
      }
    },
 
  });
 
  grunt.loadNpmTasks('grunt-contrib-sass');
  grunt.loadNpmTasks('grunt-contrib-coffee');
  grunt.loadNpmTasks('grunt-contrib-haml');
  grunt.loadNpmTasks('grunt-ng-annotate');
  grunt.loadNpmTasks('grunt-contrib-watch');
  grunt.loadNpmTasks('grunt-newer');
 
  grunt.registerTask(
    'build',
    'Builds scripts and styles and watches for changes',
    ['haml', 'sass', 'coffee', 'ngAnnotate', 'watch']
  );
};