nixos-config/profiles/workspace/i3blocks/scripts/bluetooth.nix

{ iconfont, bash, bluez, pulseaudio, utillinux, python3, ... }:
''
  #!${bash}/bin/bash
  if ${utillinux}/bin/rfkill | grep bluetooth > /dev/null; then
    if ${utillinux}/bin/rfkill | grep bluetooth | grep blocked > /dev/null; then
      if ${bluez}/bin/bluetoothctl info > /dev/null; then
        if ${pulseaudio}/bin/pactl list sinks | grep bluez > /dev/null; then
          echo -n ""
        else
          echo -n ""
        fi
      else
        echo -n ""
      fi
    else
      echo -n ""
    fi
  fi
''