Kirill Smelkov <kirr@xxxxxxxxxx> writes:
> Judging from sample outputs and tests nothing changes in diff -c output,
Yuck.
I do not think the processing done inside the loop for the first
path (i.e. i==0) before we call show_log(rev) affects what that
called show_log(rev) does, so it probably is a good readability
change.
Thanks.
> and this change will help later patches, when we'll be refactoring paths
> scanning into its own function with several variants - the
> show_log_first logic / code will stay common to all of them.
>
> NOTE: only now we have to take care to explicitly not show anything if
> parents array is empty, as in fact there are some clients in Git code,
> which calls diff_tree_combined() in such a way.
>
> Signed-off-by: Kirill Smelkov <kirr@xxxxxxxxxx>
> ---
> combine-diff.c | 24 ++++++++++++++----------
> 1 file changed, 14 insertions(+), 10 deletions(-)
>
> diff --git a/combine-diff.c b/combine-diff.c
> index a03147c..272931f 100644
> --- a/combine-diff.c
> +++ b/combine-diff.c
> @@ -1313,6 +1313,20 @@ void diff_tree_combined(const unsigned char *sha1,
> struct combine_diff_path *p, *paths = NULL;
> int i, num_paths, needsep, show_log_first, num_parent = parents->nr;
>
> + /* nothing to do, if no parents */
> + if (!num_parent)
> + return;
> +
> + show_log_first = !!rev->loginfo && !rev->no_commit_id;
> + needsep = 0;
> + if (show_log_first) {
> + show_log(rev);
> +
> + if (rev->verbose_header && opt->output_format)
> + printf("%s%c", diff_line_prefix(opt),
> + opt->line_termination);
> + }
> +
> diffopts = *opt;
> copy_pathspec(&diffopts.pathspec, &opt->pathspec);
> diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
> @@ -1321,8 +1335,6 @@ void diff_tree_combined(const unsigned char *sha1,
> /* tell diff_tree to emit paths in sorted (=tree) order */
> diffopts.orderfile = NULL;
>
> - show_log_first = !!rev->loginfo && !rev->no_commit_id;
> - needsep = 0;
> /* find set of paths that everybody touches */
> for (i = 0; i < num_parent; i++) {
> /* show stat against the first parent even
> @@ -1338,14 +1350,6 @@ void diff_tree_combined(const unsigned char *sha1,
> diffcore_std(&diffopts);
> paths = intersect_paths(paths, i, num_parent);
>
> - if (show_log_first && i == 0) {
> - show_log(rev);
> -
> - if (rev->verbose_header && opt->output_format)
> - printf("%s%c", diff_line_prefix(opt),
> - opt->line_termination);
> - }
> -
> /* if showing diff, show it in requested order */
> if (diffopts.output_format != DIFF_FORMAT_NO_OUTPUT &&
> opt->orderfile) {
--
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