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• Clojure Koans

• https://www.maria.cloud/

  • https://www.maria.cloud/intro

Installing Emacs on macOS

- <https://github.com/railwaycat/homebrew-emacsmacport>

$ sudo rm /usr/bin/emacs
$ sudo rm -rf /usr/share/emacs
$ brew tap railwaycat/emacsmacport
$ brew install emacs-mac

Bootstrapping with Emacs and Lein

Cider

• https://github.com/clojure-emacs/cider
• Needs MELPA-Stable – Install like this:

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

• Docs: https://docs.cider.mx/cider/basics/up_and_running.html

Leiningen

• brew install leiningen

Extra packages

• https://docs.cider.mx/cider/additional_packages.html#paredit

(add-hook 'clojure-mode-hook #'paredit-mode)
(add-hook 'clojure-mode-hook #'rainbow-delimiters-mode)

(add-hook 'cider-repl-mode-hook #'paredit-mode)
(add-hook 'cider-repl-mode-hook #'rainbow-delimiters-mode)

Issues

• Start with lein new test-project
• Open project.clj in Emacs
• M-x cider-jack-in → “The lein executable isn’t on your ‘exec-path’”
• Solution: Customize Group cider https://stackoverflow.com/a/64281978
• Clojure Setup for TDD