[Docs] Mention that CIDER's now available on NonGNU ELPA

Author: bbatsov

README.md

@@ -4,8 +4,6 @@
 
 -----------
 [![License GPL 3][badge-license]](http://www.gnu.org/licenses/gpl-3.0.txt)
-[![MELPA](http://melpa.org/packages/cider-badge.svg)](http://melpa.org/#/cider)
-[![MELPA Stable](http://stable.melpa.org/packages/cider-badge.svg)](http://stable.melpa.org/#/cider)
 [![CircleCI](https://circleci.com/gh/clojure-emacs/cider.svg?style=svg)](https://circleci.com/gh/clojure-emacs/cider)
 [![Spell-check Status](https://github.com/clojure-emacs/cider/actions/workflows/spell_checking.yml/badge.svg)](https://github.com/clojure-emacs/cider/actions/workflows/spell_checking.yml)
 [![Discord](https://img.shields.io/badge/chat-on%20discord-7289da.svg?sanitize=true)](https://discord.com/invite/nFPpynQPME)
@@ -43,11 +41,15 @@ details.
 
 ### Installation
 
+[![MELPA](http://melpa.org/packages/cider-badge.svg)](http://melpa.org/#/cider)
+[![MELPA Stable](http://stable.melpa.org/packages/cider-badge.svg)](http://stable.melpa.org/#/cider)
+[![NonGNU ELPA](https://elpa.nongnu.org/nongnu/projectile.svg)](https://elpa.nongnu.org/nongnu/cider.html)
+
 The recommended way to install CIDER is via `package.el` - the built-in package
 manager in Emacs.
 
-CIDER is available on the two major `package.el` community
-maintained repos -
+CIDER is available on all major `package.el` community
+maintained repos - [NonGNU ELPA](https://elpa.nongnu.org),
 [MELPA Stable](http://stable.melpa.org)
 and [MELPA](http://melpa.org).
 

doc/modules/ROOT/pages/basics/installation.adoc

@@ -24,11 +24,14 @@ WARNING: CIDER does not support ClojureCLR.
 
 == Installation via package.el
 
-CIDER is available on the two major `package.el` community
+CIDER is available on all major `package.el` community
 maintained repos -
+https://elpa.nongnu.org[NonGNU ELPA],
 http://stable.melpa.org[MELPA Stable]
 and http://melpa.org[MELPA].
 
+NOTE: NonGNU ELPA is one of Emacs's standard repositories and is enabled by default on Emacs 28+. You'll have to setup MELPA and MELPA Stable yourselves if you want to use them.
+
 You can install CIDER with the following command:
 
 kbd:[M-x package-install <RET> cider <RET>]
@@ -54,27 +57,31 @@ time to time. Nevertheless, installing from MELPA is a reasonable way
 to obtain CIDER. The `master` branch is normally quite stable
 and serious regressions there are usually fixed quickly.
 
+TIP: If you don't want to (or can't) wait for MELPA to rebuild CIDER,
+you can easily build and install an up-to-date MELPA package locally yourself. Check out
+http://emacsredux.com/blog/2015/05/10/building-melpa-packages-locally/[this article]
+for details on the subject.
+
 If you have concerns about living on the leading edge of CIDER
-deveopment, you can always pin CIDER to use MELPA Stable like this:
+development, you can always pin CIDER to use NonGNU ELPA or MELPA Stable like this:
 
 [source,lisp]
 ----
+;; pin to NonGNU ELPA
+(add-to-list 'package-pinned-packages '(cider . "nongnu") t)
+
+;; pin to MELPA Stable
 (add-to-list 'package-pinned-packages '(cider . "melpa-stable") t)
 ----
 
-TIP: If you don't want to (or can't) wait for MELPA to rebuild CIDER,
-you can easily build and install an up-to-date MELPA package locally yourself. Check out
-http://emacsredux.com/blog/2015/05/10/building-melpa-packages-locally/[this article]
-for details on the subject.
-
 NOTE: CIDER has dependencies (e.g. `queue` & `seq`) that are only available in the
 https://elpa.gnu.org/[GNU ELPA repository]. It's the only package repository
 enabled by default in Emacs and you should not disable it!
 
 == Installation via use-package
 
 `use-package` can be used to install CIDER via the ``package.el``'s repositories
-http://stable.melpa.org[MELPA Stable] and http://melpa.org[MELPA].
+https://elpa.nongnu.org[NonGNU ELPA], http://stable.melpa.org[MELPA Stable] and http://melpa.org[MELPA].
 
 If you wanted to install the version of CIDER which is what is to be found in
 the `master` branch, declare the following in your Emacs initialization file