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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: every release of emacs, i have to fix comint
Date: Sat, 04 May 2019 13:14:42 +0300
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	(message from Samuel Wales on Wed, 1 May 2019 15:03:22 -0700)
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> From: Samuel Wales <samologist@gmail.com>
> Date: Wed, 1 May 2019 15:03:22 -0700
> 
> a few releases ago, like 23 or 24, shell mode prompts stopped showing
> the beautiful colors set up in .bashrc or .profile or wherever they
> are set.
> 
> instead, the prompt was set to a new face, in a single color.
> 
> to fix it, i have to copy comint.el and quote out a couple of lines,
> which i do haphazardly but works.
> 
> for example:
> 
>               ;; alpha
> 	      '(add-text-properties prompt-start (point) '(rear-nonsticky t)))
> 
> is there a variable someplace that says "please don't chnge my bash prompt"?

It seems the prompt highlighting was originally controlled by a user
option, but then was made unconditional 17 years ago.

I suggest to file a feature request bug report to make the
highlighting conditional again.