Add initial support for many promisor remotes

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index ccf4eb7e9b3361ee7eb209180d98ce8df757d92d..0d55f73b0b443b60dccc31096675d40691b3eb56 100644 (file)
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -14,6 +14,7 @@
 #include "thread-utils.h"
 #include "packfile.h"
 #include "object-store.h"
+#include "fetch-object.h"
 
 static const char index_pack_usage[] =
 "git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
@@ -1351,6 +1352,25 @@ static void fix_unresolved_deltas(struct hashfile *f)
                sorted_by_pos[i] = &ref_deltas[i];
        QSORT(sorted_by_pos, nr_ref_deltas, delta_pos_compare);
 
+       if (repository_format_partial_clone) {
+               /*
+                * Prefetch the delta bases.
+                */
+               struct oid_array to_fetch = OID_ARRAY_INIT;
+               for (i = 0; i < nr_ref_deltas; i++) {
+                       struct ref_delta_entry *d = sorted_by_pos[i];
+                       if (!oid_object_info_extended(the_repository, &d->oid,
+                                                     NULL,
+                                                     OBJECT_INFO_FOR_PREFETCH))
+                               continue;
+                       oid_array_append(&to_fetch, &d->oid);
+               }
+               if (to_fetch.nr)
+                       fetch_objects(repository_format_partial_clone,
+                                     to_fetch.oid, to_fetch.nr);
+               oid_array_clear(&to_fetch);
+       }
+
        for (i = 0; i < nr_ref_deltas; i++) {
                struct ref_delta_entry *d = sorted_by_pos[i];
                enum object_type type;
@@ -1650,8 +1670,10 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
        int report_end_of_input = 0;
 
        /*
-        * index-pack never needs to fetch missing objects, since it only
-        * accesses the repo to do hash collision checks
+        * index-pack never needs to fetch missing objects except when
+        * REF_DELTA bases are missing (which are explicitly handled). It only
+        * accesses the repo to do hash collision checks and to check which
+        * REF_DELTA bases need to be fetched.
         */
        fetch_if_missing = 0;