From 8ab4b1ecb6c4ebafad8f5a7dcaa161894452fb7a Mon Sep 17 00:00:00 2001
From: aszlig <aszlig@redmoonstudios.org>
Date: Fri, 17 Oct 2014 09:18:55 +0200
Subject: common-workstation: Fix eval on empty head config.

Broke evaluation for tishtushi and arilou, because xrandrHeads is set to
an empty list over there (aka "unconfigured").

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
---
 common-workstation.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common-workstation.nix b/common-workstation.nix
index 3fcff9d6..ff170399 100644
--- a/common-workstation.nix
+++ b/common-workstation.nix
@@ -115,7 +115,8 @@ in {
         src = pkgs.slimThemes.nixosSlim;
         phases = [ "unpackPhase" "patchPhase" "installPhase" ];
         patchPhase = let
-          centerLeft = 100 / (lib.length randrHeads * 2);
+          headFactor = if randrHeads == [] then 1 else lib.length randrHeads;
+          centerLeft = 100 / (headFactor * 2);
         in ''
           ${pkgs.imagemagick}/bin/mogrify \
             -fill '#080010' -draw 'color 0,0 reset' \
-- 
cgit 1.4.1