unpack-trees: batch fetching of missing blobs

diff --git a/unpack-trees.c b/unpack-trees.c
index 71b70ccb12756cde1f1c5aeda952be6e2b91f5b8..73a1cdb43e351a12c1f081344ff0d8a6e78f0793 100644 (file)
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -14,6 +14,7 @@
 #include "dir.h"
 #include "submodule.h"
 #include "submodule-config.h"
+#include "fetch-object.h"
 
 /*
  * Error messages expected by scripts out of plumbing commands such as
@@ -369,6 +370,27 @@ static int check_updates(struct unpack_trees_options *o)
                load_gitmodules_file(index, &state);
 
        enable_delayed_checkout(&state);
+       if (repository_format_partial_clone && o->update && !o->dry_run) {
+               /*
+                * Prefetch the objects that are to be checked out in the loop
+                * below.
+                */
+               struct oid_array to_fetch = OID_ARRAY_INIT;
+               int fetch_if_missing_store = fetch_if_missing;
+               fetch_if_missing = 0;
+               for (i = 0; i < index->cache_nr; i++) {
+                       struct cache_entry *ce = index->cache[i];
+                       if ((ce->ce_flags & CE_UPDATE) &&
+                           !S_ISGITLINK(ce->ce_mode)) {
+                               if (!has_object_file(&ce->oid))
+                                       oid_array_append(&to_fetch, &ce->oid);
+                       }
+               }
+               if (to_fetch.nr)
+                       fetch_objects(repository_format_partial_clone,
+                                     &to_fetch);
+               fetch_if_missing = fetch_if_missing_store;
+       }
        for (i = 0; i < index->cache_nr; i++) {
                struct cache_entry *ce = index->cache[i];