On Wed, Jul 27, 2016 at 11:14:28AM +0100, Luis Gutierrez wrote:
> Hi,
>
> Attached is a potential patch for reversing the order on which
> git-mergetool presents the files to merge.
>
> Currently, when running git-mergetool, it performs a sort of the files
> to merge by alphabetical ordering. When working on C, this has the
> annoying effect of presenting the merge for a .c* files before the
> header files; which is always a bit harder to do. Reading the header
> first to figure out what the other dude changed is usually preferred.
>
> The attach patch reverse the order (-r flag to sort) so *.h* are
> merged before *.c* files
>
> PS, given the simplicity of the patch, I have not tested it.
>
> Regards
>
> Luis
Thanks for the sug, this is an interesting idea and I definitely
see why we would want something like this...
> diff --git a/git-mergetool.sh b/git-mergetool.sh
> index bf86270..cce3b0d 100755
> --- a/git-mergetool.sh
> +++ b/git-mergetool.sh
> @@ -453,10 +453,10 @@ then
> then
> files=$(git rerere remaining)
> else
> - files=$(git ls-files -u | sed -e 's/^[^ ]* //' | sort -u)
> + files=$(git ls-files -u | sed -e 's/^[^ ]* //' | sort -u
> -r)
> fi
> else
> - files=$(git ls-files -u -- "$@" | sed -e 's/^[^ ]* //' | sort -u)
> + files=$(git ls-files -u -- "$@" | sed -e 's/^[^ ]* //' | sort -u
> -r)
> fi
>
> if test -z "$files"
While we won't take this patch as-is (please see
Documentation/SubmittingPatches for details about the patch
submission process), I am interested in the use case you've
described.
This use case makes me wonder whether the sorting we do here is
something that should be opened up a bit so that the it's not
quite so set in stone.
For example, an extension to the approach taken by this patch
would be to have `mergetool.reverseOrder` git config boolean
option that would tell us whether or not to use the "-r" flag
when calling sort.
But, IMO that is too rigid, and only addresses this narrow use
case. What if users want a case-insensitive sort, or some other
preferred ordering?
We can address these concerns, and your use case, by opening it
up. Something like,
sort=$(git config mergetool.sort || echo sort -u)
That preserves the existing behavior, and it opens it up so that
we can accomplish the same result as this patch by doing:
git config mergetool.sort "sort -u -r"
Then, if someone later writes a nicer C/C++-specific sort that
sorts in the natural order but also keeps .h files before .c,
.cpp, etc. files with the same basename, then they could do:
git config mergetool.sort crescent-fresh-sort
...and it'll be totally crescent.
Thoughts? Would you be interested in helping work up a patch
for this idea? At a minimum we should also write a test case in
t/t7610-mergetool.sh to verify that it works as advertised.
Let me know if you have any questions.
cheers,
--
David
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