Redirect PostgreSQL.org docs to current version

Very useful when coming from elsewhere and ending up with docs some random ancient version.

Du musst eine Erweiterung wie Tampermonkey, Greasemonkey oder Violentmonkey installieren, um dieses Skript zu installieren.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

Sie müssten eine Skript Manager Erweiterung installieren damit sie dieses Skript installieren können

(Ich habe schon ein Skript Manager, Lass mich es installieren!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @namespace https://kludge.guru/
// @name Redirect PostgreSQL.org docs to current version
// @description Very useful when coming from elsewhere and ending up with docs some random ancient version.
// @match https://www.postgresql.org/docs/*
// @version          1.0
// ==/UserScript==

function maybeRedirect() {

  if (!document.referrer || document.referrer.indexOf('https://www.postgresql.org') === 0) { return; }

  const { pathname } = document.location;
  const match = pathname.match(/^\/docs\/[0-9\.]+\/(.*)$/);
  if (!match) { return; }

  const url = `/docs/current/${match[1]}`;
  const a = document.querySelector(`a[href="${url}"]`);
  if (!a) { return; }

  location.replace(url);

}

maybeRedirect();