reset-backlight-on-unlock.nu

#!/usr/bin/nu

let dev = '/sys/class/backlight/acpi_video0/brightness'
let back = '/tmp/backlight'

gdbus monitor -y -d org.freedesktop.login1
| each { |line|
  ^echo ($line | parse -r ''LockedHint': <(?P<locked>\w+)>' | get 0.locked)
  | into bool
  | if $in {
    ^cp $dev $back
  } else {
    sudo nu -c $'open ($back) | save ($dev)'
  }
}