Am 16.03.21 um 19:07 schrieb Richard Eisenberg:
There is no "official" way to accommodate this reasonable request. The ideas up-thread are good ones.
Thanks everyone for the many suggestions. I am using cabal to build. Vim and emacs and IDEs are not in my toolbox for various reasons. Of course I can do shell hacking to filter the messages, just wanted to ask if there is a more convenient way.
I want to pipe in that we're currently going through an internal overhaul of error-message handling that will make such a request much easier to contemplate in the future. This is active work going on right now. So there is hope, possibly for 9.4. Of course, once the internal overhaul is done, we'll need to design any features that actually change the output -- the overhaul just makes it easy to implement such features (which would be very difficult at the moment).
Looking forward to that! It seems I am not the only one who would, occasionally, prefer to get error messages in a more condensed form. Cheers Ben