in antora-ui-hop/gulp.d/tasks/build-preview-pages.js [94:102]
function registerTemplatedHelpers (src) {
return vfs.src('helpers/*.js.template', { base: src, cwd: src })
.pipe(data(() => ({ manifest: fs.readFileSync('./public/_/data/rev-manifest.json').toString() })))
.pipe(template())
.pipe(map((file, enc, next) => {
handlebars.registerHelper(file.stem.replace('.js', ''), requireFromString(file.contents.toString()))
next()
}))
}