From 575a664ee93433b6c3c0d64ea241bf9f6afbeed3 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Mon, 27 Mar 2017 18:14:49 +0200
Subject: Don't suspend hel when on power supply

---
 hel.nix | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/hel.nix b/hel.nix
index f0c95ebf..829f3cc7 100644
--- a/hel.nix
+++ b/hel.nix
@@ -474,5 +474,28 @@
   systemd.user.services."pulseaudio".enable = lib.mkForce false;
   systemd.user.services."ssh-agent".enable = lib.mkForce false;
   systemd.user.sockets."pulseaudio".enable = lib.mkForce false;
+
+  systemd.services."prevent-suspend" = {
+    description = "Inhibit handling of lid-switch and sleep";
+
+    path = with pkgs;
+             [ systemd coreutils ];
+
+    script = ''
+      #!{pkgs.stdenv.shell}
+
+      exec systemd-inhibit --what=handle-lid-switch:sleep --why="prevent-suspend.service" --mode=block sleep infinity
+    '';
+  
+    serviceConfig = {
+      Type = "simple";
+    };
+  };
+
+  services.udev.path = with pkgs; [ systemd ];
+  services.udev.extraRules = ''
+    SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_ONLINE}=="0", RUN+="systemctl --no-block start prevent-suspend.service"
+    SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_ONLINE}=="1", RUN+="systemctl --no-block stop prevent-suspend.service"
+  '';
 }
 
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