diff: teach "--stat -w --exit-code" to notice differences
When options like "-w" is used while "--exit-code" option is in
effect, instead of the usual "do we have any filepair whose preimage
and postimage have different <mode,object>?" check, we need to compare
the contents of the blobs, taking into account that certain changes
are considered no-op.
With the previous step, we taught "--patch" codepath to set the
.found_changes bit correctly, even for a change that only affects
the mode and not object. The "--stat" codepath, however, did not
set the .found_changes bit at all. This lead to
$ git diff --stat -w --exit-code
for a change that does have an output to exit with status 0.
Set the bit by inspecting the list of paths the diffstat output is
given for (a mode-only change will still appear as a "0-line added
0-line deleted" change) to fix it.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff.c b/diff.c
index 998d7ae..da965ff 100644
--- a/diff.c
+++ b/diff.c
@@ -6901,6 +6901,7 @@ void compute_diffstat(struct diff_options *options,
if (check_pair_status(p))
diff_flush_stat(p, options, diffstat);
}
+ options->found_changes = !!diffstat->nr;
}
void diff_addremove(struct diff_options *options,
