sha1_file: support lazily fetching missing objects

[thirdparty/git.git] / sha1_file.c

diff --git a/sha1_file.c b/sha1_file.c
index 10c3a0083dedee98dc3d48267ad349589adef3f0..dd956e2bb6a23909554e4ec01d8b683b43a83f1f 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -29,6 +29,7 @@
 #include "mergesort.h"
 #include "quote.h"
 #include "packfile.h"
+#include "fetch-object.h"
 
 const unsigned char null_sha1[GIT_MAX_RAWSZ];
 const struct object_id null_oid;
@@ -1144,6 +1145,8 @@ static int sha1_loose_object_info(const unsigned char *sha1,
        return (status < 0) ? status : 0;
 }
 
+int fetch_if_missing = 1;
+
 int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi, unsigned flags)
 {
        static struct object_info blank_oi = OBJECT_INFO_INIT;
@@ -1152,6 +1155,7 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
        const unsigned char *real = (flags & OBJECT_INFO_LOOKUP_REPLACE) ?
                                    lookup_replace_object(sha1) :
                                    sha1;
+       int already_retried = 0;
 
        if (!oi)
                oi = &blank_oi;
@@ -1176,19 +1180,32 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
                }
        }
 
-       if (!find_pack_entry(real, &e)) {
+       while (1) {
+               if (find_pack_entry(real, &e))
+                       break;
+
                /* Most likely it's a loose object. */
                if (!sha1_loose_object_info(real, oi, flags))
                        return 0;
 
                /* Not a loose object; someone else may have just packed it. */
-               if (flags & OBJECT_INFO_QUICK) {
-                       return -1;
-               } else {
-                       reprepare_packed_git();
-                       if (!find_pack_entry(real, &e))
-                               return -1;
+               reprepare_packed_git();
+               if (find_pack_entry(real, &e))
+                       break;
+
+               /* Check if it is a missing object */
+               if (fetch_if_missing && repository_format_partial_clone &&
+                   !already_retried) {
+                       /*
+                        * TODO Investigate haveing fetch_object() return
+                        * TODO error/success and stopping the music here.
+                        */
+                       fetch_object(repository_format_partial_clone, real);
+                       already_retried = 1;
+                       continue;
                }
+
+               return -1;
        }
 
        if (oi == &blank_oi)
@@ -1197,7 +1214,6 @@ int sha1_object_info_extended(const unsigned char *sha1, struct object_info *oi,
                 * information below, so return early.
                 */
                return 0;
-
        rtype = packed_object_info(e.p, e.offset, oi);
        if (rtype < 0) {
                mark_bad_packed_object(e.p, real);