[PATCH 02/16] list-objects: limit traversing within the given subtree if core.subtree is set

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 list-objects.c |   23 +++++++++++++++++------
 1 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/list-objects.c b/list-objects.c
index 8953548..1b25b54 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -61,12 +61,15 @@ static void process_tree(struct rev_info *revs,
 			 struct tree *tree,
 			 show_object_fn show,
 			 struct name_path *path,
-			 const char *name)
+			 const char *name,
+			 const char *subtree)
 {
 	struct object *obj = &tree->object;
 	struct tree_desc desc;
 	struct name_entry entry;
 	struct name_path me;
+	const char *slash;
+	int subtree_len;
 
 	if (!revs->tree_objects)
 		return;
@@ -82,13 +85,21 @@ static void process_tree(struct rev_info *revs,
 	me.elem = name;
 	me.elem_len = strlen(name);
 
+	if (subtree) {
+		slash = strchr(subtree, '/');
+		subtree_len = slash ? slash - subtree : strlen(subtree);
+	}
+
 	init_tree_desc(&desc, tree->buffer, tree->size);
 
 	while (tree_entry(&desc, &entry)) {
-		if (S_ISDIR(entry.mode))
-			process_tree(revs,
-				     lookup_tree(entry.sha1),
-				     show, &me, entry.path);
+		if (S_ISDIR(entry.mode)) {
+			if (!subtree || !strncmp(entry.path, subtree, subtree_len))
+				process_tree(revs,
+					     lookup_tree(entry.sha1),
+					     show, &me, entry.path,
+					     slash && slash[1] ? slash+1 : NULL);
+		}
 		else if (S_ISGITLINK(entry.mode))
 			process_gitlink(revs, entry.sha1,
 					show, &me, entry.path);
@@ -164,7 +175,7 @@ void traverse_commit_list(struct rev_info *revs,
 		}
 		if (obj->type == OBJ_TREE) {
 			process_tree(revs, (struct tree *)obj, show_object,
-				     NULL, name);
+				     NULL, name, core_subtree);
 			continue;
 		}
 		if (obj->type == OBJ_BLOB) {
-- 
1.7.1.rc1.69.g24c2f7