commit - e5c03b5556a9c6effc6a983a9ff4a0a43709c91e
commit + a62a9cd59d45e9b2d65e691529c380a6fddff4c7
blob - 43420d51963fb8796ed7148130020e3b879a4c8a
blob + 8b52a98aa8b52fe2d3775b7f19516cb967ebdec3
--- include/got_error.h
+++ include/got_error.h
@@ -59,7 +59,7 @@
 #define GOT_ERR_PACK_OFFSET	42
 #define GOT_ERR_OBJ_EXISTS	43
 #define GOT_ERR_BAD_OBJ_ID	44
-/* 45 is currently unused */
+#define GOT_ERR_OBJECT_FORMAT	45
 #define GOT_ERR_ITER_COMPLETED	46
 #define GOT_ERR_RANGE		47
 #define GOT_ERR_EXPECTED	48 /* for use in regress tests only */
blob - 9bffc4e83ea4a9ea3c5f65dc26cdd5fd0d069712
blob + 2897f7222b41cd87986de117e09ca594c4bef16f
--- lib/error.c
+++ lib/error.c
@@ -83,6 +83,7 @@ static const struct got_error got_errors[] = {
 	{ GOT_ERR_PACK_OFFSET,	"bad offset in pack file" },
 	{ GOT_ERR_OBJ_EXISTS,	"object already exists" },
 	{ GOT_ERR_BAD_OBJ_ID,	"bad object id" },
+	{ GOT_ERR_OBJECT_FORMAT, "object format not supported" },
 	{ GOT_ERR_ITER_COMPLETED,"iteration completed" },
 	{ GOT_ERR_RANGE,	"value out of range" },
 	{ GOT_ERR_EXPECTED,	"expected an error but have no error" },
blob - c2bffe1a9e66be605e77b82a0240a6e4bf6ac481
blob + feddab7822ac272eff0ebf1280dd08ce8e64454f
--- lib/repository.c
+++ lib/repository.c
@@ -791,7 +791,7 @@ got_repo_open(struct got_repository **repop, const cha
 	err = read_gitconfig(repo, global_gitconfig_path);
 	if (err)
 		goto done;
-	if (repo->gitconfig_repository_format_version != 0) {
+	if (repo->gitconfig_repository_format_version > 1) {
 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
 		goto done;
 	}
@@ -799,6 +799,18 @@ got_repo_open(struct got_repository **repop, const cha
 		char *ext = repo->extnames[i];
 		char *val = repo->extvals[i];
 		int j, supported = 0;
+
+		if (repo->gitconfig_repository_format_version == 1 &&
+		    strcasecmp(ext, "objectformat") == 0) {
+			if (strcmp(val, "sha1") == 0)
+				continue;
+			if (strcmp(val, "sha256") == 0) {
+				repo->algo = GOT_HASH_SHA256;
+				continue;
+			}
+			err = got_error_path(val, GOT_ERR_OBJECT_FORMAT);
+			goto done;
+		}
 
 		if (!is_boolean_val(val)) {
 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);