bug#36832: Supply option to suppress scrolling in compilation mode buffers.

[Alan Mackenzie <acm@muc.de>]

Hello, Eli.

On Tue, Jul 30, 2019 at 18:14:28 +0300, Eli Zaretskii wrote:
> > Date: Sun, 28 Jul 2019 20:32:21 +0000
> > From: Alan Mackenzie <acm@muc.de>

> > I propose enhancing the customisation variable compilation-context-lines
> > with the extra value t meaning "never scroll the compilation mode buffer".

> With this setting, how would the user know which error line is the
> "current" one, whose source is displayed above?

Either by remembering it (she's just hit <CR> on it, after all), or by
doing C-x o to move to that line, then C-x o to move back again.

The new option is intended for users who find being reminded of the
current error line less important than being able to see the error lines
above the current one "in context".

A possible modification would be to highlight the current line in the
compilation mode buffer, but that's beginning to feel like a lot of work
for a feature which might not really be wanted by anybody.

This is an option, a non-default option, one which nobody is forced to
use.  Having hacked it up a couple of days ago, I find it less stressful
to use than the setting where the buffer jumps when I hit <CR> on it.

-- 
Alan Mackenzie (Nuremberg, Germany).