sha1-file: split OBJECT_INFO_FOR_PREFETCH

The OBJECT_INFO_FOR_PREFETCH bitflag was added to sha1-file.c in 0f4a4fb1
(sha1-file: support OBJECT_INFO_FOR_PREFETCH, 2019-03-29) and is used to
prevent the fetch_objects() method when enabled.

However, there is a problem with the current use. The definition of
OBJECT_INFO_FOR_PREFETCH is given by adding 32 to OBJECT_INFO_QUICK. This is
clearly stated above the definition (in a comment) that this is so
OBJECT_INFO_FOR_PREFETCH implies OBJECT_INFO_QUICK. The problem is that using
"flag & OBJECT_INFO_FOR_PREFETCH" means that OBJECT_INFO_QUICK also implies
OBJECT_INFO_FOR_PREFETCH.

Split out the single bit from OBJECT_INFO_FOR_PREFETCH into a new
OBJECT_INFO_SKIP_FETCH_OBJECT as the single bit and keep
OBJECT_INFO_FOR_PREFETCH as the union of two flags. This allows a clearer use
of flag checking while also keeping the implication of OBJECT_INFO_QUICK.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/object-store.h b/object-store.h
index dd3f9b75f04e6a23b235d415d15824aca8a43d20..c90628d839512696ac4a339c28b21ec18b46daca 100644 (file)
--- a/object-store.h
+++ b/object-store.h
@@ -282,10 +282,14 @@ struct object_info {
 #define OBJECT_INFO_IGNORE_LOOSE 16
 /*
  * Do not attempt to fetch the object if missing (even if fetch_is_missing is
- * nonzero). This is meant for bulk prefetching of missing blobs in a partial
- * clone. Implies OBJECT_INFO_QUICK.
+ * nonzero).
  */
-#define OBJECT_INFO_FOR_PREFETCH (32 + OBJECT_INFO_QUICK)
+#define OBJECT_INFO_SKIP_FETCH_OBJECT 32
+/*
+ * This is meant for bulk prefetching of missing blobs in a partial
+ * clone. Implies OBJECT_INFO_SKIP_FETCH_OBJECT and OBJECT_INFO_QUICK
+ */
+#define OBJECT_INFO_FOR_PREFETCH (OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK)
 
 int oid_object_info_extended(struct repository *r,
                             const struct object_id *,

diff --git a/sha1-file.c b/sha1-file.c
index ad02649124bb817360d6cd1ab9b354fd3243cdd7..0299fdd5161a59bf88d9f2c41a83c7e6ecd4cc2b 100644 (file)
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -1371,7 +1371,7 @@ int oid_object_info_extended(struct repository *r, const struct object_id *oid,
                /* Check if it is a missing object */
                if (fetch_if_missing && repository_format_partial_clone &&
                    !already_retried && r == the_repository &&
-                   !(flags & OBJECT_INFO_FOR_PREFETCH)) {
+                   !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) {
                        /*
                         * TODO Investigate having fetch_object() return
                         * TODO error/success and stopping the music here.