Re: -s theirs use-case(s) Was: BUG: merge -s theirs is not in effect
Yaroslav Halchenko
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2017-09-27 20:21:32 UTC

On Wed, 27 Sep 2017, Yaroslav Halchenko wrote:
> > And at that point, use of "-s ours" is no longer a workaround for
> > lack of "-s theirs".  It is a proper part of the desired semantics,
> > i.e. from the point of view of the surviving canonical history line,
> > you want to preserve what it did, nullifying what the other line of
> > history did.

> > So I still do not think the above scenario justifies "-s theirs".

> ok, when you describe it like this (in my case I rarely cared about the
> side of the merge), then indeed I might better do the entire dance with
> git reset --hard theirstate; git merge -s ours HEAD@{1}
> and live happily with the left side being the one always correct and
> hide "my" mistakes ;)  will keep it in mind

ha -- was about to use it, which reminded me about this use case!

NB pardon me for not so wonderful ascii-diagrams as yours but hopefully
still helps

              x-o-o-o-x-o-o    debian
             /        /
             x-------x-----    releases -- should just linearly sweep through releases I care about
            /       /
           R1      R2          various release branches/tags
           A       B           which have differing commits
          /       /
      ---o---o----o----o        masteg

For packaging some packages for Debian, with my git-rotten-soul, I am trying to
keep my debian packaging  (in a branch "debian") on top of upstream
releases.  But the problem comes whenever upstream releases from "release
branches", which are never merged into master and might have different and
conflicting changes.  

So, it becomes impossible to maintain a linearly progressing "debian"
branch without adding a middle-man between upstream releases (in release
branches), and debian branch (should progress linearly forward) -- "releases"
branch.  See e.g. and its releases

so I use -s theirs for "linearizing" the branched up development history

Yaroslav O. Halchenko
Center for Open Neuroscience
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419