Copy my DualShock PlayStation 4 controller Bluetooth key from Linux to Windows, so it keeps paired when i dual boot :)

copyBlueToothKeysToWindows.sh

#!/bin/bash

set -e

input_pattern="/var/lib/bluetooth/*/*/info"
output_folder="/mnt/data/ubuntu/"

for file in ${input_pattern}; do
    content=$(cat "${file}")

    name=$(grep -oP '(?<=Name=).*' <<< "${content}")
    name="${name// /_}"

    key=$(grep -oP '(?<=Key=).*' <<< "${content}")
    key=$(echo -n "${key}" | sed 's/\([0-9A-F]\{2\}\)/\L\1,/g' | sed 's/,$//' || true)

    device=$(basename "$(dirname "${file}")")
    device=$(tr -d ':' <<< "${device,,}")

    controller=$(basename "$(dirname "$(dirname "${file}")")")
    controller=$(tr -d ':' <<< "${controller,,}")

    filename="${output_folder}${name}_${controller}_${device}.reg"

    cat > "${filename}" <<EOL
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\BTHPORT\\Parameters\\Keys\\${controller}]
"${device}"=hex:${key}

EOL
   echo "---"
   echo "--- File: ${filename}"
   echo "---"
   cat "${filename}"

done