urlTransform() — supabase Function Reference

Source Code

apps/docs/app/guides/deployment/ci/[slug]/page.tsx lines 99–130

const urlTransform: UrlTransformFunction = (url) => {
  try {
    const externalSiteUrl = new URL(externalSite)

    const placeholderHostname = 'placeholder'
    const { hostname, pathname, hash } = new URL(url, `http://${placeholderHostname}`)

    // Don't modify a url with a FQDN or a url that's only a hash
    if (hostname !== placeholderHostname || pathname === '/') {
      return url
    }

    const relativePage = (
      pathname.endsWith('.md')
        ? pathname.replace(/\.md$/, '')
        : relative(externalSiteUrl.pathname, pathname)
    ).replace(/^\//, '')

    const page = pageMap.find(({ remoteFile }) => `${relativePage}.md` === remoteFile)

    // If we have a mapping for this page, use the mapped path
    if (page) {
      return page.slug + hash
    }

    // If we don't have this page in our docs, link to original docs
    return `${externalSite}/${relativePage}${hash}`
  } catch (err) {
    console.error('Error transforming markdown URL', err)
    return url
  }
}