Jeff King <p...@peff.net> writes:
> So I dunno. A sensible rule to me is "iff -p would show a diff header,
> then --stat should mention it".
True but tricky (you need a better definition of "a diff header").
In addition to a new and deleted file, does a file whose executable
bit was flipped need mention? If so, then "diff --git" is the diff
header in the above. Otherwise "@@ ... @@", iow, "iff -p would show
any hunk".
I think the patch implements the latter, which I think is sensible.
> + /*
> + * Omit diffstats where nothing changed. Even if
> + * !same_contents, this might be the case due to ignoring
> + * whitespace changes, etc.
> + *
> + * But note that we special-case additions and deletions,
> + * as adding an empty file, for example, is still of interest.
> + */
> + if (DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two)) {
> + struct diffstat_file *file =
> + diffstat->files[diffstat->nr - 1];
> + if (!file->added && !file->deleted) {
> + free_diffstat_file(file);
> + diffstat->nr--;
> + }
> + }
> }
