This package provides basic interaction with a Clojure subprocess (REPL). It's based on ideas from the popular inferior-lisp package.

inf-clojure has two components - a nice Clojure REPL with auto-completion and a minor mode (inf-clojure-minor-mode), which extends clojure-mode with commands to evaluate forms directly in the REPL.

For a more powerful/full-featured solution see CIDER.

Available on all major package.el community maintained repos - MELPA Stable and MELPA repos.

MELPA Stable is recommended as it has the latest stable version. MELPA has a development snapshot for users who don't mind breakage but don't want to run from a git checkout.

You can install inf-clojure using the following command:

M-x package-install [RET] inf-clojure [RET]

or if you'd rather keep it in your dotfiles:

(unless (package-installed-p 'inf-clojure)
  (package-refresh-contents)
  (package-install 'inf-clojure))

If the installation doesn't work try refreshing the package list:

M-x package-refresh-contents

Add the following to your Emacs config to enable inf-clojure-minor-mode for Clojure source buffers:

(add-hook 'clojure-mode-hook #'inf-clojure-minor-mode)

Don't enable inf-clojure-minor-mode and cider-mode at the same time. They have overlapping functionality and keybindings and the result will be nothing short of havoc.

M-x inf-clojure or C-c C-z within a Clojure source file.

inf-clojure has several custom variables which control the command used to start a REPL for particular project type - inf-clojure-lein-cmd, inf-clojure-boot-cmd and inf-clojure-generic-cmd.

By default all those variables are set to strings (e.g. lein repl). However, it is possible to use a cons pair like ("localhost" . 5555) to connect to a socket REPL like the one provided with planck, which can be started from the command line with planck -n 5555.

Use C-u C-c C-z to start a REPL with a different command/cons pair than the default specified in inf-clojure-program.

You can set custom values to inf-clojure variables on a per-project basis using directory variables.

An inf-clojure REPL can be of different types: Clojure, ClojureScript, Lumo and Planck are all potentially valid options. At the moment, the default Clojure REPL and the Lumo REPL (though partially, see #44) are supported.

To hook up a custom REPL type, just use the right launch command (or connect through socket). For example, for Lumo just add the following in your .dir-locals.el:

((nil . ((inf-clojure-boot-cmd . "lumo")))) ;; inf-clojure-lein-cmd if you are using Leiningen

eldoc-mode is supported in Clojure source buffers and *inferior-clojure* buffers which are running a Clojure REPL.

When ElDoc is enabled and there is an active REPL, it will show the argument list of the function call you are currently editing in the echo area.

You can activate ElDoc with M-x eldoc-mode or by adding the following to you Emacs config:

(add-hook 'clojure-mode-hook #'eldoc-mode)
(add-hook 'inf-clojure-mode-hook #'eldoc-mode)

ElDoc currently doesn't work with ClojureScript buffers and REPL's. You can leave it enabled, it just won't show anything in the echo area.

In Windows, the REPL is not returning anything. For example, type (+ 1 1) and press ENTER, the cursor just drops to a new line and nothing is shown.

The explanation of this problem and solution can be found here.

The solution is to create a file named .jline.rc in your $HOME directory and add this line to that file:

jline.terminal=unsupported

Copyright © 2014-2017 Bozhidar Batsov and contributors.

Distributed under the GNU General Public License; type C-h C-c to view it.