config: add `git_die_config()` to the config-set API

diff --git a/config.c b/config.c
index cd59c4a0f2aa033288496757ec03e0f1a01f9338..8449a8ac450550372b0b17d3e0d5f63d3d159a70 100644 (file)
--- a/config.c
+++ b/config.c
@@ -1471,8 +1471,12 @@ const struct string_list *git_config_get_value_multi(const char *key)
 
 int git_config_get_string_const(const char *key, const char **dest)
 {
+       int ret;
        git_config_check_init();
-       return git_configset_get_string_const(&the_config_set, key, dest);
+       ret = git_configset_get_string_const(&the_config_set, key, dest);
+       if (ret < 0)
+               git_die_config(key, NULL);
+       return ret;
 }
 
 int git_config_get_string(const char *key, char **dest)
@@ -1513,8 +1517,39 @@ int git_config_get_maybe_bool(const char *key, int *dest)
 
 int git_config_get_pathname(const char *key, const char **dest)
 {
+       int ret;
        git_config_check_init();
-       return git_configset_get_pathname(&the_config_set, key, dest);
+       ret = git_configset_get_pathname(&the_config_set, key, dest);
+       if (ret < 0)
+               git_die_config(key, NULL);
+       return ret;
+}
+
+NORETURN
+void git_die_config_linenr(const char *key, const char *filename, int linenr)
+{
+       if (!filename)
+               die(_("unable to parse '%s' from command-line config"), key);
+       else
+               die(_("bad config variable '%s' in file '%s' at line %d"),
+                   key, filename, linenr);
+}
+
+NORETURN __attribute__((format(printf, 2, 3)))
+void git_die_config(const char *key, const char *err, ...)
+{
+       const struct string_list *values;
+       struct key_value_info *kv_info;
+
+       if (err) {
+               va_list params;
+               va_start(params, err);
+               vreportf("error: ", err, params);
+               va_end(params);
+       }
+       values = git_config_get_value_multi(key);
+       kv_info = values->items[values->nr - 1].util;
+       git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
 }
 
 /*