repository: implement extensions.compatObjectFormat

[thirdparty/git.git] / setup.c

diff --git a/setup.c b/setup.c
index aa8bf5da5226b7394771e6cc953dc96b7da637ac..85259a259be33e289d8c6ab464d0e1930431f448 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -590,6 +590,25 @@ static enum extension_result handle_extension(const char *var,
                                     "extensions.objectformat", value);
                data->hash_algo = format;
                return EXTENSION_OK;
+       } else if (!strcmp(ext, "compatobjectformat")) {
+               struct string_list_item *item;
+               int format;
+
+               if (!value)
+                       return config_error_nonbool(var);
+               format = hash_algo_by_name(value);
+               if (format == GIT_HASH_UNKNOWN)
+                       return error(_("invalid value for '%s': '%s'"),
+                                    "extensions.compatobjectformat", value);
+               /* For now only support compatObjectFormat being specified once. */
+               for_each_string_list_item(item, &data->v1_only_extensions) {
+                       if (!strcmp(item->string, "compatobjectformat"))
+                               return error(_("'%s' already specified as '%s'"),
+                                       "extensions.compatobjectformat",
+                                       hash_algos[data->compat_hash_algo].name);
+               }
+               data->compat_hash_algo = format;
+               return EXTENSION_OK;
        }
        return EXTENSION_UNKNOWN;
 }
@@ -1565,7 +1584,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
                if (startup_info->have_repository) {
                        repo_set_hash_algo(the_repository, repo_fmt.hash_algo);
                        repo_set_compat_hash_algo(the_repository,
-                                                 GIT_HASH_UNKNOWN);
+                                                 repo_fmt.compat_hash_algo);
                        the_repository->repository_format_worktree_config =
                                repo_fmt.worktree_config;
                        /* take ownership of repo_fmt.partial_clone */
@@ -1659,7 +1678,7 @@ void check_repository_format(struct repository_format *fmt)
        check_repository_format_gently(get_git_dir(), fmt, NULL);
        startup_info->have_repository = 1;
        repo_set_hash_algo(the_repository, fmt->hash_algo);
-       repo_set_compat_hash_algo(the_repository, GIT_HASH_UNKNOWN);
+       repo_set_compat_hash_algo(the_repository, fmt->compat_hash_algo);
        the_repository->repository_format_worktree_config =
                fmt->worktree_config;
        the_repository->repository_format_partial_clone =