wt-status: convert struct wt_status to object_id

Change struct wt_status to use struct object_id instead of an array of
unsigned char.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/commit.c

@@ -510,7 +510,7 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
 	s->nowarn = nowarn;
 	s->is_initial = get_oid(s->reference, &oid) ? 1 : 0;
 	if (!s->is_initial)
-		hashcpy(s->sha1_commit, oid.hash);
+		oidcpy(&s->oid_commit, &oid);
 	s->status_format = status_format;
 	s->ignore_submodule_arg = ignore_submodule_arg;
 
@@ -1406,7 +1406,7 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 
 	s.is_initial = get_oid(s.reference, &oid) ? 1 : 0;
 	if (!s.is_initial)
-		hashcpy(s.sha1_commit, oid.hash);
+		oidcpy(&s.oid_commit, &oid);
 
 	s.ignore_submodule_arg = ignore_submodule_arg;
 	s.status_format = status_format;

wt-status.c

@@ -2025,7 +2025,7 @@ static void wt_porcelain_v2_print_tracking(struct wt_status *s)
 	char eol = s->null_termination ? '\0' : '\n';
 
 	fprintf(s->fp, "# branch.oid %s%c",
-			(s->is_initial ? "(initial)" : sha1_to_hex(s->sha1_commit)),
+			(s->is_initial ? "(initial)" : oid_to_hex(&s->oid_commit)),
 			eol);
 
 	if (!s->branch)

wt-status.h

@@ -116,7 +116,7 @@ struct wt_status {
 	int rename_limit;
 	enum wt_status_format status_format;
 	struct wt_status_state state;
-	unsigned char sha1_commit[GIT_MAX_RAWSZ]; /* when not Initial */
+	struct object_id oid_commit; /* when not Initial */
 
 	/* These are computed during processing of the individual sections */
 	int committable;