gruntfile.js

module.exports = function(grunt) {

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

	// Run Sass to compile all of our CSS
	sass: {
      dist: {
        options: {
          style: 'nested' // compact, compressed, nested or expanded
        },
        files: {
          'source/a/pre-css/screen-pre.css' : 'source/a/sass/screen.scss'
        }
      }
    },

    // Run Autoprefixer on our css after sass compile, then move it to css dir.
    postcss: {
      options: {
        map: true,
        processors: [
          require('autoprefixer')({browsers: 'last 2 versions'})
        ]
      },

      dist: {
        src: 'source/a/pre-css/screen-pre.css',
        dest: 'source/css/style.css'
      }
    },

    // Make sure any custom js is not stupid, then concatonate stuffs
    jshint: {
      beforeuglify: 'source/a/js/script.js'
    },

    uglify: {
      dist: {
        files: {
          'source/js/jquery-min.js' : 'source/a/js/jquery/jquery.js',
          'source/js/script-min.js' : ['source/a/js/plugins/*.js','source/a/js/script.js']
        }
      }
    },

    // Generate Pattern Lab
   shell: {
	  patternlab: {
	    command: "php core/console --generate"
	  }
	},

    // Watch options: what tasks to run when changes to files are saved
    watch: {
      options: {
        livereload: true,
      },

		html: {
			files: ['source/_patterns/**/*.mustache', 'source/_patterns/**/*.json', 'source/_data/*.json'],
			tasks: ['shell:patternlab']
		},

		sass: {
	        files: ['source/a/sass/**/*.scss'],
	        tasks: ['sass', 'postcss', 'shell:patternlab']
	    },

	   jstest: {
	        files: ['source/a/js/script.js'],
	        tasks: ['jshint']
	    },

	    jsmin: {
	        files: ['source/a/js/**/*.js'], 
	        tasks: ['uglify', 'shell:patternlab']
	    }
	},

  });

  grunt.loadNpmTasks('grunt-shell');
  grunt.loadNpmTasks('grunt-contrib-sass');
  grunt.loadNpmTasks('grunt-postcss');
  grunt.loadNpmTasks('grunt-contrib-uglify');
  grunt.loadNpmTasks('grunt-contrib-jshint');
  grunt.loadNpmTasks('grunt-contrib-watch');

  grunt.registerTask('default', ['sass', 'postcss', 'jshint', 'uglify', 'shell:patternlab', 'watch']);

  grunt.registerTask('css', ['sass', 'postcss']);
  grunt.registerTask('js', ['jshint', 'uglify']);

};