upload-pack: optionally allow fetching reachable sha1

diff --git a/diff-lib.c b/diff-lib.c
index 875aff864391ed037627462ac39c314f248b5ae6..a85c4971ac8ece6397c05d0674bbac8c75cf219f 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -101,6 +101,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                struct cache_entry *ce = active_cache[i];
                int changed;
                unsigned dirty_submodule = 0;
+               const unsigned char *old_sha1, *new_sha1;
 
                if (diff_can_quit_early(&revs->diffopt))
                        break;
@@ -224,9 +225,12 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                continue;
                }
                oldmode = ce->ce_mode;
+               old_sha1 = ce->sha1;
+               new_sha1 = changed ? null_sha1 : ce->sha1;
                diff_change(&revs->diffopt, oldmode, newmode,
-                           ce->sha1, (changed ? null_sha1 : ce->sha1),
-                           !is_null_sha1(ce->sha1), (changed ? 0 : !is_null_sha1(ce->sha1)),
+                           old_sha1, new_sha1,
+                           !is_null_sha1(old_sha1),
+                           !is_null_sha1(new_sha1),
                            ce->name, 0, dirty_submodule);
 
        }