[PATCH 3/6] revision: factor out add_parent()

[René Scharfe <l.s.r@xxxxxx>]

Split out the addition of a single parent into a helper.  We'll use it
in the next commit.

Signed-off-by: René Scharfe <l.s.r@xxxxxx>
---
 revision.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/revision.c b/revision.c
index 4f896b4992..14cb73e508 100644
--- a/revision.c
+++ b/revision.c
@@ -1847,19 +1847,27 @@ static struct commit *get_commit(struct rev_info *revs, const char *arg_)
 	return (struct commit *)it;
 }

-static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
-			    int exclude_parent)
+static void add_parent(struct rev_info *revs, struct object *parent,
+		       const char *arg_, int flags)
 {
-	struct object *it;
-	struct commit *commit = get_commit(revs, arg_);
-	struct commit_list *parents;
-	int parent_number;
 	const char *arg = arg_;

 	if (*arg == '^') {
 		flags ^= UNINTERESTING | BOTTOM;
 		arg++;
 	}
+	parent->flags |= flags;
+	add_rev_cmdline(revs, parent, arg_, REV_CMD_PARENTS_ONLY, flags);
+	add_pending_object(revs, parent, arg);
+}
+
+static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
+			    int exclude_parent)
+{
+	struct commit *commit = get_commit(revs, arg_);
+	struct commit_list *parents;
+	int parent_number;
+
 	if (!commit)
 		return 0;
 	if (exclude_parent &&
@@ -1871,10 +1879,7 @@ static int add_parents_only(struct rev_info *revs, const char *arg_, int flags,
 		if (exclude_parent && parent_number != exclude_parent)
 			continue;

-		it = &parents->item->object;
-		it->flags |= flags;
-		add_rev_cmdline(revs, it, arg_, REV_CMD_PARENTS_ONLY, flags);
-		add_pending_object(revs, it, arg);
+		add_parent(revs, &parents->item->object, arg_, flags);
 	}
 	return 1;
 }
--
2.37.3