ssh: support using ssh-configured user

Let ssh use the user configured in its configuration files when the
target user is set to the empty string.

Closes https://github.com/krebs/krops/issues/2

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/default.nix b/lib/default.nix
index bed284d..9fdde0b 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -44,7 +44,7 @@ let {
 
     mkTarget = s: let
       default = defVal: val: if val != null then val else defVal;
-      parse = lib.match "(([^@]+)@)?(([^:/]+))?(:([^/]+))?(/.*)?" s;
+      parse = lib.match "(([^@]*)@)?(([^:/]+))?(:([^/]+))?(/.*)?" s;
       elemAt' = xs: i: if lib.length xs > i then lib.elemAt xs i else null;
     in if lib.isString s then {
       user = default (lib.getEnv "LOGNAME") (elemAt' parse 1);