lib/shell: add optional print functions

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/shell.nix b/lib/shell.nix
index 3f6defc..d7d15fa 100644
--- a/lib/shell.nix
+++ b/lib/shell.nix
@@ -16,6 +16,9 @@ let
   };
 
 in rec {
+  ifSomeAttrs = attrs: f: pkgs.lib.optionalString (attrs != {}) (f attrs);
+  ifSomeList = list: f: pkgs.lib.optionalString (list != []) (f list);
+
   exportEnvVar = k: v: ''
     export ${escapeShellArg k}="${v}"
   '';