nixos-config/scripts/auto_connect_gamepad

#!/bin/sh

list_paired_controllers() {
    bluetoothctl devices Paired | grep -i 'controller' | cut -d' ' -f2
}

count_connected_controllers() {
    bluetoothctl devices Connected | grep -i 'controller' | wc -l
}

try_to_connect_to_all_controllers() {
    list_paired_controllers | while read paired_controller; do
        echo "Trying to connect to controller $paired_controller"
        bluetoothctl connect "$paired_controller"
    done
}

while true; do
    echo "looping"
    if test "$(count_connected_controllers)" -ne 0 ; then
        echo "there is a controller connected, not attempting to connect to any other"
        sleep 10s
        continue
    fi
    sleep 1s
    try_to_connect_to_all_controllers
done