From ce4d2b09c4d7418aa095a418ff643a74bf37b78d Mon Sep 17 00:00:00 2001
From: Sebastian Sellmeier <mail@sebastian-sellmeier.de>
Date: Wed, 15 Dec 2021 20:03:34 +0100
Subject: [PATCH] lib/lists: Introduce new lib-function for lists to filter out
 empty elements e.g. for string building

---
 modules/lib/default.nix | 1 +
 modules/lib/lists.nix   | 8 ++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 modules/lib/lists.nix

diff --git a/modules/lib/default.nix b/modules/lib/default.nix
index c087c81097a7..a4d290fa21c8 100644
--- a/modules/lib/default.nix
+++ b/modules/lib/default.nix
@@ -19,6 +19,7 @@ rec {
   assertions = import ./assertions.nix { inherit lib; };
 
   gvariant = import ./gvariant.nix { inherit lib; };
+  lists = import ./lists.nix { inherit lib; };
   maintainers = import ./maintainers.nix;
   strings = import ./strings.nix { inherit lib; };
   types = import ./types.nix { inherit dag gvariant lib; };
diff --git a/modules/lib/lists.nix b/modules/lib/lists.nix
new file mode 100644
index 000000000000..d4a921ba4836
--- /dev/null
+++ b/modules/lib/lists.nix
@@ -0,0 +1,8 @@
+{ lib }:
+
+with lib;
+
+rec {
+  # Removes empty elements from list
+  notEmpty = list: filter (x: x != "" && x != null) (flatten list);
+}