Merge branch 'jk/alloc-commit-id'

Make sure all in-core commit objects are assigned a unique number
so that they can be annotated using the commit-slab API.

* jk/alloc-commit-id:
  diff-tree: avoid lookup_unknown_object
  object_as_type: set commit index
  alloc: factor out commit index
  add object_as_type helper for casting objects
  parse_object_buffer: do not set object type
  move setting of object->type to alloc_* functions
  alloc: write out allocator definitions
  alloc.c: remove the alloc_raw_commit_node() function

1 files changed, 2 insertions, 9 deletions

diff --git a/blob.c b/blob.c
index ae320bd8fa..1fcb8e44b0 100644
--- a/blob.c
+++ b/blob.c
@@ -7,15 +7,8 @@ struct blob *lookup_blob(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
 	if (!obj)
-		return create_object(sha1, OBJ_BLOB, alloc_blob_node());
-	if (!obj->type)
-		obj->type = OBJ_BLOB;
-	if (obj->type != OBJ_BLOB) {
-		error("Object %s is a %s, not a blob",
-		      sha1_to_hex(sha1), typename(obj->type));
-		return NULL;
-	}
-	return (struct blob *) obj;
+		return create_object(sha1, alloc_blob_node());
+	return object_as_type(obj, OBJ_BLOB, 0);
 }
 
 int parse_blob_buffer(struct blob *item, void *buffer, unsigned long size)