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Unable to install cider to emacs – package not found – Debian

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

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4

Answers


  1. Chosen as BEST ANSWER
    0

    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.

    1. Install: M-x package-install <RET> cider <RET>

    2. M-x package-list-packages - Move to the end of the listing to see Status=installed packages.

    3. 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.


  2. 0

    You may also consider trying out popular existing “bundle setups’ like Spacemacs and Prelude Both of which have all the tooling necessary for Clojure development built-in.

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  3. 0

    Instead of modifying .emacs or init file manually, you can just change the package-archives variable by typing the following:

    M-x customize-variable package-archives

    By default, you should only have a GNU source set. Go ahead and add Melpa’s name and URL (https://melpa.org/packages/) too by clicking INS. Then apply the changes. Next, type the following commands into the terminal:

    M-x package-refresh-contents  [RET]
M-x package-install [RET] cider [RET]

    You should be all set.

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  4. 0

    CIDER is available on the two major package.el community maintained repos – MELPA Stable and MELPA.

    After adding the following in my ./emacs, i could install CIDER.

    (setq package-archives
    '(("Elpa"     . "https://elpa.gnu.org/packages/")
      ("Melpa Stable" . "https://stable.melpa.org/packages/")
      ("Melpa"        . "https://melpa.org/packages/")
      ("marmalade" . "http://marmalade-repo.org/packages/"))
    package-archive-priorities
    '(("MELPA Stable" . 10)
      ("GNU ELPA"     . 5)
      ("MELPA"        . 0)))
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