replace light with brightnessctl

Closes #107

roles/laptop/tasks/main.yml

@@ -26,8 +26,8 @@
 - name: Enable and start lowbatt timer
   service: name=lowbatt.timer enabled=yes state=started
 
-- name: Install light
-  pacman: name=light state=present
+- name: Install brightnessctl
+  pacman: name=brightnessctl state=present
 
 - name: Install powertop
   pacman: name=powertop state=present

roles/screensaver/files/lock.sh

@@ -1,17 +1,17 @@
 #!/bin/sh
 
-hash light 2> /dev/null
+hash brightnessctl 2> /dev/null
 if [ $? -eq 0 ]; then
     BRIGHTNESS=true
 fi
 
 if ! pidof i3lock > /dev/null; then
     if [ "$BRIGHTNESS" = true ]; then
-        light -O
-        light -S 10
+        brightnessctl --quiet --save
+        brightnessctl --quiet set 10%
     fi
     /usr/bin/i3lock --color=1d2021 --ignore-empty-password
     if [ "$BRIGHTNESS" = true ]; then
-        light -I
+        brightnessctl --quiet --restore
     fi
 fi