Re: 1.6 vs. 1.8: strange behavior of 'svn diff -cN WC-FILE' if the file was created in rev N by copying

On Wed, Jun 26, 2013 at 3:01 PM, Stefan Sperling <stsp_at_elego.de> wrote:
> On Wed, Jun 26, 2013 at 01:39:59PM +0200, Johan Corveleyn wrote:
>> As Tobias pointed out, 'svn diff' does indeed do the diff against the
>> copy source, but *only if you're lucky*. I would consider this erratic
>> behavior definitely a bug, because it makes the output unpredictable,
>> and thus unusable in general.
>
> OK, you've both convinced me now. I agree that diff -c could trace
> copyfrom even if the copfrom rev is outside the operative revision
> range, and display an 'added' file only with --show-copies-as-adds.
>
> Now, the problem is that the repos->repos diff case doesn't support
> --show-copies-as-adds yet (see do_diff() in libsvn_client/diff.c).
> So it's not a trivial fix and might require some work to get done.

Perhaps we should regard that as a separate problem. Isn't the fact
that --show-copies-as-adds doesn't work for repos->repos diff,
orthogonal to fixing the default behavior (non-show-copies-as-adds)
regarding moved files?

Or do you feel that the change in behavior ("fix") of diff -c is
dependent on a good working --show-copies-as-adds?

--
Johan