Teach git-repack to preserve objects referred to by reflog entries.

This adds a new option --reflog to pack-objects and revision
machinery; do not bother documenting it for now, since this is
only useful for local repacking.

When the option is passed, objects reachable from reflog entries
are marked as interesting while computing the set of objects to
pack.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 807be8c3f8a051d9171cf2ee3c9f973f77a2ff08..9e15beb3ba1e66987bd1fec51ed864414ffbf07c 100644 (file)
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -17,7 +17,7 @@ static const char pack_usage[] = "\
 git-pack-objects [{ -q | --progress | --all-progress }] \n\
        [--local] [--incremental] [--window=N] [--depth=N] \n\
        [--no-reuse-delta] [--delta-base-offset] [--non-empty] \n\
-       [--revs [--unpacked | --all]*] [--stdout | base-name] \n\
+       [--revs [--unpacked | --all]*] [--reflog] [--stdout | base-name] \n\
        [<ref-list | <object-list]";
 
 struct object_entry {
@@ -1575,6 +1575,7 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
                }
                if (!strcmp("--unpacked", arg) ||
                    !strncmp("--unpacked=", arg, 11) ||
+                   !strcmp("--reflog", arg) ||
                    !strcmp("--all", arg)) {
                        use_internal_rev_list = 1;
                        if (ARRAY_SIZE(rp_av) - 1 <= rp_ac)

diff --git a/git-repack.sh b/git-repack.sh
index 067898f1207736732c2c80eabbef5537f8dfef69..375434b1dcdd3183c85b1278c4415e9136508192 100755 (executable)
--- a/git-repack.sh
+++ b/git-repack.sh
@@ -62,7 +62,7 @@ case ",$all_into_one," in
 esac
 
 args="$args $local $quiet $no_reuse_delta$extra"
-name=$(git-pack-objects --non-empty --all $args </dev/null "$PACKTMP") ||
+name=$(git-pack-objects --non-empty --all --reflog $args </dev/null "$PACKTMP") ||
        exit 1
 if [ -z "$name" ]; then
        echo Nothing new to pack.

diff --git a/revision.c b/revision.c
index 4dae5342eb6e14758c93fa4b2942d7c053111d04..bda9d4dfa58a9b4af33e117314aa48ce74dcbdb9 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -464,21 +464,59 @@ static void limit_list(struct rev_info *revs)
        revs->commits = newlist;
 }
 
-static int all_flags;
-static struct rev_info *all_revs;
+struct all_refs_cb {
+       int all_flags;
+       struct rev_info *all_revs;
+       const char *name_for_errormsg;
+};
 
 static int handle_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
 {
-       struct object *object = get_reference(all_revs, path, sha1, all_flags);
-       add_pending_object(all_revs, object, "");
+       struct all_refs_cb *cb = cb_data;
+       struct object *object = get_reference(cb->all_revs, path, sha1,
+                                             cb->all_flags);
+       add_pending_object(cb->all_revs, object, "");
        return 0;
 }
 
 static void handle_all(struct rev_info *revs, unsigned flags)
 {
-       all_revs = revs;
-       all_flags = flags;
-       for_each_ref(handle_one_ref, NULL);
+       struct all_refs_cb cb;
+       cb.all_revs = revs;
+       cb.all_flags = flags;
+       for_each_ref(handle_one_ref, &cb);
+}
+
+static int handle_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1, char *detail, void *cb_data)
+{
+       struct all_refs_cb *cb = cb_data;
+       struct object *object;
+
+       if (!is_null_sha1(osha1)) {
+               object = get_reference(cb->all_revs, cb->name_for_errormsg,
+                                      osha1, cb->all_flags);
+               add_pending_object(cb->all_revs, object, "");
+       }
+       object = get_reference(cb->all_revs, cb->name_for_errormsg,
+                              nsha1, cb->all_flags);
+       add_pending_object(cb->all_revs, object, "");
+       return 0;
+}
+
+static int handle_one_reflog(const char *path, const unsigned char *sha1, int flag, void *cb_data)
+{
+       struct all_refs_cb *cb = cb_data;
+       cb->name_for_errormsg = path;
+       for_each_reflog_ent(path, handle_one_reflog_ent, cb_data);
+       return 0;
+}
+
+static void handle_reflog(struct rev_info *revs, unsigned flags)
+{
+       struct all_refs_cb cb;
+       cb.all_revs = revs;
+       cb.all_flags = flags;
+       for_each_ref(handle_one_reflog, &cb);
 }
 
 static int add_parents_only(struct rev_info *revs, const char *arg, int flags)
@@ -805,6 +843,10 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                                handle_all(revs, flags);
                                continue;
                        }
+                       if (!strcmp(arg, "--reflog")) {
+                               handle_reflog(revs, flags);
+                               continue;
+                       }
                        if (!strcmp(arg, "--not")) {
                                flags ^= UNINTERESTING;
                                continue;