WIP: Gruntfile with Sass and Server to use with Patternlab

Gruntfile.js

'use strict';

module.exports = function (grunt) {
    // show elapsed time at the end
    require('time-grunt')(grunt);
    // load all grunt tasks
    require('jit-grunt')(grunt);

    grunt.initConfig({
        watch: {
            // Runs Sass and calls Autoprefixer afterwards
            sass: {
                files: ['source/scss/**/*.scss'],
                tasks: ['sass:dev','autoprefixer']
            },
            // taken from http://bradfrostweb.com/blog/post/using-grunt-with-pattern-lab/
            html: {
                files: ['source/_patterns/**/*.mustache', 'source/**/*.json'],
                tasks: ['shell:patternlabDev'],
                options: {
                    spawn: false
                }
            }
        },
        // call PHP from the shell
        shell: {
            patternlab: {
                command: "php core/builder.php -g"
            },
            patternlabDev: {
                command: "php core/builder.php -gp"
            }
        },
        // connect points to 'public', where all your Patternlab files are generated
        connect: {
            dev: {
                options: {
                    port: 9000,
                    hostname: '0.0.0.0',
                    base: 'public/',
                    open: true
                }
            }
        },
        sass: {
            dev: {
                files: {
                    'public/css/style.css' : ['source/scss/style.scss']
                }
            },
            test: {
                files: {
                    'public/css/style.css' : ['source/scss/style.scss']
                }
            },
            build: {
                options: {
                    style: 'compressed'
                },
                files: {
                    'public/css/style.css' : ['source/scss/style.scss']
                }
            }
        },
        autoprefixer: {
            options: {
                browsers: ['last 2 versions']
            },
            dist: {
                files: [{
                    expand: true,
                    cwd: 'public/css/',
                    src: '{,*/}*.css',
                    dest: 'public/css/'
                }]
            }
        },
        // in some cases, the styleguide does not get deployed, copy it manually
        copy: {
            styleguide: {
                files: [
                    {expand: true, cwd: 'core/styleguide', src: ['**/*.*'], dest: 'public/styleguide/'},
                ]
            }
        }
    });

    // run the dev task
    grunt.registerTask('dev',[
        'shell:patternlabDev',
        'copy:styleguide',
        'sass:dev',
        'autoprefixer',
        'connect',
        'watch'
    ]);

};