Gulpfile.js

var gulp = require('gulp'),
    sass = require('gulp-sass'),
    concat = require('gulp-concat'),
    puli = require('gulp-puli');

gulp.task('default', ['js', 'css', 'fonts']);

gulp.task('css', function () {
    gulp.src(['node_modules/bootstrap-sass/assets/stylesheets/_bootstrap.scss', 'res/scss/style.scss'])
        .pipe(concat('style.scss'))
        .pipe(sass())
        .pipe(gulp.dest('res/public/css/'));
    
});

gulp.task('puli', puli.publish());

/*
=

gulp.src('res/public')
    .pipe(gulp.dest('web'));

gulp.src('vendor/batman/blog/res/public')
    .pipe(gulp.dest('web/blog'));
*/

gulp.task('js', function () {
    gulp.src([
            'res/js/script.js',
            'node_modules/jquery/dist/jquery.min.js',
            'node_modules/bootstrap-sass/assets/javascripts/bootstrap.min.js'
        ])
        .pipe(gulp.dest('res/public/js/'));
});

gulp.task('fonts', function () {
    gulp.src('node_modules/bootstrap-sass/assets/fonts/bootstrap/*')
        .pipe(gulp.dest('res/public/fonts/'));
});

gulp.task('watch', function () {
    gulp.watch('res/scss/*.scss', ['css']);
    gulp.watch('res/js/*.js', ['js']);
    
    puli.watch(gulp, ['puli']);
    
    /*
    =
    gulp.watch('res/public', ['puli']);
    gulp.watch('vendor/batman/blog/res/public', ['puli']);
    */
});

GulpPlugin.php

<?php

/*
 * This file is part of the puli/gulp-plugin package.
 *
 * (c) Bernhard Schussek <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Puli\GulpPlugin;

use Puli\Manager\Api\Event\PuliEvents;
use Puli\Manager\Api\Puli;
use Puli\Manager\Api\PuliPlugin;
use Puli\Repository\Api\Resource\FilesystemResource;
use Webmozart\PathUtil\Path;

/**
 * Integrates Puli with the Gulp frontend workflow tool.
 *
 * @since  1.0
 *
 * @author Bernhard Schussek <[email protected]>
 */
class GulpPlugin implements PuliPlugin
{
    /**
     * {@inheritdoc}
     */
    public function activate(Puli $puli)
    {
        $dispatcher = $puli->getEventDispatcher();

        $repo = $puli->getRepository();
        $assetManager = $puli->getAssetManager();
        $serverManager = $puli->getServerManager();

        foreach ($assetManager->getAssetMappings() as $mapping) {
            $resource = $repo->get($mapping->getGlob());

            if (!$resource instanceof FilesystemResource) {
                // exception
            }

            $relPath = Path::makeRelative($resource->getFilesystemPath(), $puli->getRootDirectory());

            $server = $serverManager->getServer($mapping->getServerName());

            $serverPath = $server->getDocumentRoot().'/'.$mapping->getServerPath();
        }

        // Add event listeners that generate the JSON file here
        $dispatcher->addListener(PuliEvents::XXX, array($this, 'handleXxx'));
    }
}