Racket: Wiring it up to a REPL ala SLIME/Swank
One of the awesome things about working with clojure is that it’s possible to wire up clojure files in emacs to a REPL by making use of Slime/Swank.
I’ve started using Racket to work through the examples in The Little Schemer and wanted to achieve a similar thing there.
Racket is a modern programming language in the Lisp/Scheme family, suitable for a wide range of applications
I don’t know much about configuring emacs so I made use of Phil Halgelberg’s emacs-starter-kit which is available on github.
On my travels I came across this video describing how to do exactly what I wanted.
The first step was to download a library called ‘geiser‘:
Geiser is a generic Emacs/Scheme interaction mode, featuring an enhanced REPL and a set of minor modes improving Emacs' basic scheme major mode.
The easiest way seemed to be to clone the git repository:
git clone git://gitorious.org/geiser/mainline.git geiser
I then added the following line to my /Users/mneedham.emacs.d/init.el file:
From emacs you then need to run the following command:
It then asks you which scheme implementation you want to use, so in our case we need to make sure that racket is available on the path.
For some reason when I downloaded racket it seemed to prefer mounting itself as a volume rather than installing itself to /Applications so I ended up copy/pasting the folder to my home directory and adding it to the PATH in my .bashrc:
export PATH=$PATH:"/Users/mneedham/Documents/Racket v5.2.1/bin"
Now we can just type ‘racket’ when we’re asked which scheme implementation we want and then we’re done!