Re: Allow "git shortlog" to group by committer information

On Tue, Oct 11, 2016 at 12:01 PM, Jeff King [off-list ref] wrote:

My implementation is a little more complicated because it's also setting
things up for grouping by trailers (so you can group by "signed-off-by",
for example). I don't know if that's useful to your or not.

Hmm. Maybe in theory. But probably not in reality - it's just not
unique enough (ie there are generally multiple, and if you choose the
first/last, it should be the same as author/committer, so it doesn't
actually add anything).

There are possibly other things that *could* be grouped by and might be useful:

 - main subdirectory it touches (I've often wanted that)

 - rough size of diff or number of files it touches

but realistically both are painful enough that it probably doesn't
make sense to do in some low-level helper.

I'm fine with this less invasive version, but a few suggestions:

 - do you want to call it --group-by=committer (with --group-by=author
   as the default), which could later extend naturally to other forms of
   grouping?

Honestly, it's probably the more generic one, but especially for
one-off commands that aren't that common, it's a pain to write. When
testing it, I literally just used "-c" for that reason.

I wrote the patch because I've wanted this before, but it's a "once or
twice a merge window" thing for me, so ..

 - you might want to steal the tests and documentation from my patch
   (though obviously they would need tweaked to match your interface)

Heh. Yes.

          Linus