[SOLVED] Unable to install cider to emacs

Unable to install cider to emacs - package not found

Fresh install of Ubuntu 20.04 Added openjdk-11 and lein 2.9.3

$ sudo apt-add-repository ppa:kelleyk/emacs

Installed GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.14) of 2020-03-26, modified by Debian

Tried the instructions on the cider Getting Started page

M-x package-refresh-contents
M-x package install <RET>
cider <RET>

The cider package isn't found. Tried to package-list-packages - list doesn't contain cider. What am I missing?

Finally did the steps from the following link to get it to work Brave Clojure book companion repo

Solution

Not sure why the cider instructions don't mention this.

You need to create a ~/.emacs.d/init.el file with the following contents

(require 'package)

(add-to-list 'package-archives
             '("melpa" . "https://melpa.org/packages/") t)

(package-initialize)

(when (not package-archive-contents)
  (package-refresh-contents))

Save and restart emacs.

M-x package-list-packages check the archive column shows packages from gnu as well as melpa archives.

Sometimes you would see an error Failed to download ‘gnu’ archive. - this one is a flaky one. A restart and/or M-x package-refresh-contents fixed it for me.

Now we have the sources configured correctly.

Install: M-x package-install <RET> cider <RET>
M-x package-list-packages - Move to the end of the listing to see Status=installed packages.
Test: M-x cider-jack-in. Answer no to the prompt indicating you are not in a clojure project. Soon you should be dropped to a user> prompt - ready to REPL and roll.