CIDER is the Clojure(Script) Interactive Development Environment that Rocks!
CIDER extends Emacs with support for interactive
in Clojure. The features are centered around
cider-mode, an Emacs
minor-mode that complements clojure-mode. While
supports editing Clojure source files,
cider-mode adds support for
interacting with a running Clojure process for compilation, code
completion, debugging, definition and documentation lookup, running
tests and so on.
Bozhidar (a.k.a. Bug, CIDER's primary author/maintainer) has spent countless hours working on CIDER and the numerous related projects. That's a lot of work and not all of it is fun!
Please consider supporting financially CIDER's ongoing development.
The instructions that follow are meant to get you from zero to a running CIDER REPL in under 5 minutes. See the online documentation for (way) more details.
The recommended way to install CIDER is via
package.el - the built-in package
manager in Emacs.
CIDER is available on all major
maintained repos - NonGNU ELPA,
Provided you've enabled one of them in your Emacs setup, you can install CIDER with the following command:
Launch an nREPL server and client from Emacs
Simply open in Emacs a file belonging to your
boot project (like
foo.clj) and type M-x
cider-jack-in. This will start an nREPL
server with all the project dependencies loaded in and CIDER will automatically
connect to it.
Alternatively you can use C-u M-x
cider-jack-in to specify the path to
a Clojure project, without having to visit any file in it.
Tip: In Clojure(Script) buffers the command
cider-jack-in is bound to
C-c C-x (C-)j.
Connect to a running nREPL server
You can go to your project's directory in a terminal and type there (assuming you're using Leiningen that is):
$ lein repl
Or with Boot:
$ boot repl -s wait
Alternatively you can start nREPL either manually or by the facilities provided
by your project's build tool (
tools.deps, Gradle, Maven, etc).
After you get your nREPL server running go back to Emacs. Typing there M-x
cider-connect will allow you to connect to the running nREPL server.
Tip: In Clojure(Script) buffers the command
cider-connect is bound to
C-c C-x (C-)c (C-)j and the command
cider-connect-cljs is bound to
C-c C-x (C-)c (C-)s.
CIDER packs a ton of functionality and you really want to be familiar with it, so you can fully empower your workflow. The best way to get acquainted with all available features is to go over the entire CIDER manual.
If you're into video lessons, you might also check out this intro to CIDER demo as well.
Quick Reference Card
You'll find all of CIDER's essential commands and their keybindings in its one-page printable quick reference card.
New CIDER users might benefit from keeping a copy close to their keyboard.
Start with CIDER's discussions board. If it doesn't get the job done consider some of the other available support channels.
An extensive changelog is available here.
The Core Team
The direction of the project is being stewarded by the CIDER core team. This group of long-term contributors manage releases, evaluate pull-requests, and does a lot of the groundwork on major new features.
- Bozhidar Batsov (author & head maintainer)
- Vitalie Spinu
- Michael Griffiths
- Lars Andersen
In addition, we'd like to extend a special thanks the following retired CIDER core team members. Lovingly known as The Alumni:
- Tim King (original author)
- Phil Hagelberg
- Hugo Duncan
- Steve Purcell
- Artur Malabarba
- Jeff Valk
We’re following SemVer.
You can read more on the subject here.
CIDER's logo was created by @tapeinosyne. You can find the logo in various formats here.
The logo is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
CIDER's homepage https://cider.mx is in the
gh-pages branch of this repository and is deployed
automatically when changes are made to it.
It's just a single
index.html file and a bit of Bootstrap 4. Contributions to it are very welcome!
While CIDER is free software and will always be, the project would benefit immensely from some funding. Raising a monthly budget of a couple of thousand dollars would make it possible to pay people to work on certain complex features, fund other development related stuff (e.g. hardware, conference trips) and so on. Raising a monthly budget of over $5000 would open the possibility of someone working full-time on the project which would speed up the pace of development significantly.
We welcome both individual and corporate sponsors! We also offer a wide array of funding channels to account for your preferences (although currently Open Collective is our preferred funding platform).
If you're working in a company that's making significant use of CIDER we'd appreciate it if you suggest to your company to become a CIDER sponsor.
You can support the development of CIDER, clojure-mode and inf-clojure via Open Collective, GitHub Sponsors, Patreon and PayPal.
Open Collective Backers
Open Collective Sponsors
Become a sponsor and get your logo on our README on Github with a link to your site. [Become a sponsor]
CIDER is distributed under the GNU General Public License, version 3.
Copyright © 2012-2023 Bozhidar Batsov, Artur Malabarba, Tim King, Phil Hagelberg and contributors.