How to use?

[jcguu95]

I'm not sure how to use it effectively. I think I set everything up, but the following still didn't work:

CL-USER> (format t "\\033[31;1;4mHello\\033[0m")
\033[31;1;4mHello\033[0m

It emits the escape code to the standard output (repl).

[PuercoPop]

@jcguu95 To verify things are working you can use cl-ansi-text, which is what prove used to colorize its output if prove:*enable-colors* is bound to t.

(ql:quickload "cl-ansi-text") 
(cl-ansi-text:with-color (:green) (format t "hello world"))

However I haven't used this package since I discovered that xterm-color covers the sly-mrepl (which is based in comint-mode) and more! I recommend you use that instead. This should be enough to get sly-mrepl to understand terminal colors:

(require 'xterm-color)
(add-hook 'comint-preoutput-filter-functions 'xterm-color-filter t)
(setq comint-output-filter-functions
          (remove 'ansi-color-process-output comint-output-filter-functions))

[jcguu95]

Thank you! (cl-ansi-text:with-color (:green) (format t "hello world")) does give me a text in green. However, I still can't find a way for the coloring to work for outputs from external programs. E.g.

(with-input-from-string (s "Highlighted text.") 
  (uiop:run-program "grep text" :input s :output t :error-output t))

I will take a look at 'xterm-color when I have time. It would still be nice to know how to work that around for your module, since it is the default supported lang contrib in doom emacs. Thanks again :)