init: use setup.c's repo version verification

We check our templates to make sure they are from a
version of git we understand (otherwise we would init a
repository we cannot ourselves run in!). But our simple
integer check has fallen behind the times. Let's use the
helpers that setup.c provides to do it right.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/init-db.c b/builtin/init-db.c
index e9b22569ff00ce1bf85d7969c44667d644adc82f..d9934f3592a4364066ff070c219556883f29959e 100644 (file)
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -95,6 +95,8 @@ static void copy_templates(const char *template_dir)
        struct strbuf path = STRBUF_INIT;
        struct strbuf template_path = STRBUF_INIT;
        size_t template_len;
+       struct repository_format template_format;
+       struct strbuf err = STRBUF_INIT;
        DIR *dir;
        char *to_free = NULL;
 
@@ -121,17 +123,18 @@ static void copy_templates(const char *template_dir)
 
        /* Make sure that template is from the correct vintage */
        strbuf_addstr(&template_path, "config");
-       repository_format_version = 0;
-       git_config_from_file(check_repository_format_version,
-                            template_path.buf, NULL);
+       read_repository_format(&template_format, template_path.buf);
        strbuf_setlen(&template_path, template_len);
 
-       if (repository_format_version &&
-           repository_format_version != GIT_REPO_VERSION) {
-               warning(_("not copying templates of "
-                       "a wrong format version %d from '%s'"),
-                       repository_format_version,
-                       template_dir);
+       /*
+        * No mention of version at all is OK, but anything else should be
+        * verified.
+        */
+       if (template_format.version >= 0 &&
+           verify_repository_format(&template_format, &err) < 0) {
+               warning(_("not copying templates from '%s': %s"),
+                         template_dir, err.buf);
+               strbuf_release(&err);
                goto close_free_return;
        }