ANSI Escape sequences printed verbatim with realgud:ipdb

[rocky]

@stnbu commented on Thu Apr 20 2017

I'm quite new to emacs so please forgive any stupid...

I have the following in my ~/.emacs

(add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on)
(add-to-list 'comint-output-filter-functions 'ansi-color-process-output)

This does address a similar problem (re ANSI color sequences) with elpy+ipython.

But when I

M-x load-library [RET] realgud [RET]

M-x realgud:ipdb [RET]

from within a python buffer, I get a new ipdb interpreter in another window (that appears to be working as expected). But I get the above mentioned ANSI color escape sequence problem:

Current directory: /foo/
Command: ipdb /foo/__init__.py
> /foo/__init__.py(1)<module>()
----> 1 import paramiko
      2 
      3 

�[6n�[Jipdb> �[6D�[6C
�[6D�[Jipdb> �[6D
�[J�[6n�[Jipdb> �[6D�[6C�[6D�[J�[6n�[Jipdb> �[6D�[6C

From my package listing buffer:

 realgud       20170218.740  installed

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@eflanigan00 commented on Thu Jul 13 2017

Anyone know anything about this? I'm having the same problem.

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@xkal36 commented on Sun Aug 13 2017

I came across this problem also. I detailed my fix here: https://emacs.stackexchange.com/questions/34854/ipdb-displaying-ansi-color-escape-sequences

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@rocky commented on Sun Aug 13 2017

@xkal36 I'd be grateful if you documented the workaround in off of https://github.com/realgud/realgud/wiki

Although beggars can't be choosers, my suggestion would be to document the problem in general: ANSI escape codes in Emacs shells, and then under ipdb notes add a mention to that along with your sample shell script that disables ANSI control codes. Thanks in advance.

I've added entries to the wiki. I may also try more aggressive ANSI Escape code filtering in the future.

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@rocky commented on Tue Aug 15 2017

@stnbu @eflanigan00 @xkal36 I have just created a branch that may address this by filtering out all ANSI escape codes. Try this patch and let me know if this helps:

diff --git a/realgud/common/track.el b/realgud/common/track.el
index f26a0ed..3097de0 100644
--- a/realgud/common/track.el
+++ b/realgud/common/track.el
@@ -41,6 +41,11 @@
   :type 'symbolp
   :group 'realgud)
 
+(defcustom realgud-strip-ansi? nil
+"If non-nil, set strip ANSI control characters from output text we see"
+  :type 'symbolp
+  :group 'realgud)
+
 (declare-function fn-p-to-fn?-alias                   'realgud-helper)
 (declare-function realgud-bp-add-info                 'realgud-bp)
 (declare-function realgud-bp-del-info                 'realgud-bp)
@@ -182,7 +187,8 @@ evaluating (realgud-cmdbuf-info-loc-regexp realgud-cmdbuf-info)"
 
   (interactive "r")
   (if (> from to) (psetq to from from to))
-  (let* ((text (buffer-substring-no-properties from to))
+  (let* ((raw-text (buffer-substring-no-properties from to))
+	 (text (if realgud-strip-ansi? (ansi-color-filter-apply raw-text) raw-text))
 	 (loc (realgud-track-loc text cmd-mark))
 	 ;; If we see a selected frame number, it is stored
 	 ;; in frame-num. Otherwise, nil.

It is also in the strip-ansi-var branch on github.