Configuring redshift

config/redshift.conf

@@ -0,0 +1,6 @@
+[redshift]
+temp-day=6500
+temp-night=3000
+transition=1
+brightness-day=1.0
+brightness-night=0.8

config/redshift/hooks/brightness.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+main() {
+  : "${BRIGHTNESS_DAY:=100}"
+  : "${BRIGHTNESS_TRANSITION:=50}"
+  : "${BRIGHTNESS_NIGHT:=20}"
+  : "${FADE_TIME:=60000}"
+
+  if [[ "${1}" != period-changed ]]; then
+    return
+  fi
+
+  case "${3}" in
+  night)
+    xbacklight -set "${BRIGHTNESS_NIGHT}" -time "${FADE_TIME}"
+    ;;
+  transition)
+    xbacklight -set "${BRIGHTNESS_TRANSITION}" -time "${FADE_TIME}"
+    ;;
+  daytime)
+    xbacklight -set "${BRIGHTNESS_DAY}" -time "${FADE_TIME}"
+    ;;
+  esac
+}
+
+main "$@"