Forked from https://github.com/deadtrickster/slime-repl-ansi-color

Originally stated:

I found this code here http://lists.common-lisp.net/pipermail/slime-devel/2012-March/018497.html.

Original author is Max Mikhanosha.

Copy slime-repl-ansi-color.el to your slime contribs directory. In my case ~/.emacs.d/site-lisp/slime/contrib/

Modify your (slime-setup) line in your .emacs file.

In my case, this line reads:

(slime-setup '(slime-fancy slime-banner slime-repl-ansi-color))

The ansi color terminal should no be enabled by default. You can check by running

(format t "~c[31mabc~c[0mqweqwe~%" #\ESC #\ESC)

If that doesn't work, try M-x and write

(slime-repl-ansi-on)

You can disable the ansi color terminal with:

(slime-repl-ansi-off)

https://github.com/pnathan/cl-ansi-text