Move code for finding paths for which diff(commit,parent_i) is not-empty
for all parents to separate function - at present we have generic (and
slow) code for this job, which translates 1 n-parent problem to n
1-parent problems and then intersect results, and will be adding another
limited, but faster, paths scanning implementation in the next patch.
Signed-off-by: Kirill Smelkov <kirr@xxxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
( re-posting without change )
combine-diff.c | 80 ++++++++++++++++++++++++++++++++++++++--------------------
1 file changed, 53 insertions(+), 27 deletions(-)
diff --git a/combine-diff.c b/combine-diff.c
index 68d2e53..1732dfd 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -1301,6 +1301,51 @@ static const char *path_path(void *obj)
return path->path;
}
+
+/* find set of paths that every parent touches */
+static struct combine_diff_path *find_paths(const unsigned char *sha1,
+ const struct sha1_array *parents, struct diff_options *opt)
+{
+ struct combine_diff_path *paths = NULL;
+ int i, num_parent = parents->nr;
+
+ int output_format = opt->output_format;
+ const char *orderfile = opt->orderfile;
+
+ opt->output_format = DIFF_FORMAT_NO_OUTPUT;
+ /* tell diff_tree to emit paths in sorted (=tree) order */
+ opt->orderfile = NULL;
+
+ for (i = 0; i < num_parent; i++) {
+ /*
+ * show stat against the first parent even when doing
+ * combined diff.
+ */
+ int stat_opt = (output_format &
+ (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
+ if (i == 0 && stat_opt)
+ opt->output_format = stat_opt;
+ else
+ opt->output_format = DIFF_FORMAT_NO_OUTPUT;
+ diff_tree_sha1(parents->sha1[i], sha1, "", opt);
+ diffcore_std(opt);
+ paths = intersect_paths(paths, i, num_parent);
+
+ /* if showing diff, show it in requested order */
+ if (opt->output_format != DIFF_FORMAT_NO_OUTPUT &&
+ orderfile) {
+ diffcore_order(orderfile);
+ }
+
+ diff_flush(opt);
+ }
+
+ opt->output_format = output_format;
+ opt->orderfile = orderfile;
+ return paths;
+}
+
+
void diff_tree_combined(const unsigned char *sha1,
const struct sha1_array *parents,
int dense,
@@ -1308,7 +1353,7 @@ void diff_tree_combined(const unsigned char *sha1,
{
struct diff_options *opt = &rev->diffopt;
struct diff_options diffopts;
- struct combine_diff_path *p, *paths = NULL;
+ struct combine_diff_path *p, *paths;
int i, num_paths, needsep, show_log_first, num_parent = parents->nr;
/* nothing to do, if no parents */
@@ -1327,35 +1372,16 @@ void diff_tree_combined(const unsigned char *sha1,
diffopts = *opt;
copy_pathspec(&diffopts.pathspec, &opt->pathspec);
- diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
DIFF_OPT_SET(&diffopts, RECURSIVE);
DIFF_OPT_CLR(&diffopts, ALLOW_EXTERNAL);
- /* tell diff_tree to emit paths in sorted (=tree) order */
- diffopts.orderfile = NULL;
- /* find set of paths that everybody touches */
- for (i = 0; i < num_parent; i++) {
- /* show stat against the first parent even
- * when doing combined diff.
- */
- int stat_opt = (opt->output_format &
- (DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
- if (i == 0 && stat_opt)
- diffopts.output_format = stat_opt;
- else
- diffopts.output_format = DIFF_FORMAT_NO_OUTPUT;
- diff_tree_sha1(parents->sha1[i], sha1, "", &diffopts);
- diffcore_std(&diffopts);
- paths = intersect_paths(paths, i, num_parent);
-
- /* if showing diff, show it in requested order */
- if (diffopts.output_format != DIFF_FORMAT_NO_OUTPUT &&
- opt->orderfile) {
- diffcore_order(opt->orderfile);
- }
-
- diff_flush(&diffopts);
- }
+ /* find set of paths that everybody touches
+ *
+ * NOTE find_paths() also handles --stat, as it computes
+ * diff(sha1,parent_i) for all i to do the job, specifically
+ * for parent0.
+ */
+ paths = find_paths(sha1, parents, &diffopts);
/* find out number of surviving paths */
for (num_paths = 0, p = paths; p; p = p->next)
--
1.9.rc1.181.g641f458
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