Re: [PATCH] diff.c: respect diff.renames config option

Eric Wong [off-list ref] writes:

Nevertheless, it's still opt -in via repo-config, and most people will
find renames useful unless they need to export to non-git
systems.

I am more worried about somebody who opts-in finds breakage of
commands that happen to internally use low-level diff machinery
and expect the diff machinery does not automagically do funny
rename detection without being told.

For example, revision walking with path pruning uses diff
machinery without renames.  I do not know what happens if I
override it with diff.renames to allow rename detection but I
fear something might horribly break.

That is why I said I do not want this at _that_ low level.  I do
not have objections to have the configuration at a layer closer
to the UI, e.g. things in builtin-log.c and builtin-diff.c.