git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/builtin-config.c b/builtin-config.c
index 077d8ef2df4ae38d668293cc35810b39e0488f6b..2b9a4261d4e98281855ce856041eb730565a4869 100644 (file)
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -79,9 +79,10 @@ static int get_value(const char* key_, const char* regex_)
                local = getenv(CONFIG_LOCAL_ENVIRONMENT);
                if (!local)
                        local = repo_config = xstrdup(git_path("config"));
-               if (home)
+               if (git_config_global() && home)
                        global = xstrdup(mkpath("%s/.gitconfig", home));
-               system_wide = git_etc_gitconfig();
+               if (git_config_system())
+                       system_wide = git_etc_gitconfig();
        }
 
        key = xstrdup(key_);