Android adb Backup bash script with notifications/checks on Mac

backupAndroid.sh

#!/usr/bin/env bash
# Backup Android via ADB
set -euf -o pipefail

# configuration
ADB_DEVICE_ID="beefdead" # your device id from `adb devices`
OUT_DIR="/Volumes/SOMEDRIVE/Android Backups"
FILENAME="android-$(date +%Y-%m-%d-%H%M).ab"

# change to script directory
cd "$(dirname "$0")"

# check for adb
if [[ ! -x $(which adb) ]] ; then
    echo "[-] ERROR: Required dependencies unmet. Please verify that the following are installed, executable, and in the PATH:  adb" >&2
    exit 1
fi

# Check device is connected first
ADB_DEVICES=$(adb devices)
if [[ $ADB_DEVICES != *"$ADB_DEVICE_ID"* ]]
then
  echo "$ADB_DEVICE_ID is not connected - Aborting backup"
  osascript -e 'display notification "Android Device is not connected" with title "Android Backup Failed"'
  exit
fi

# Check base directory
if [[ ! -d "$OUT_DIR" ]]; then
    echo "[-] ERROR: '$OUT_DIR' doesn't exist or isn't a directory" >&2
    exit 1
fi
echo "[+] Verifying that destination directory is writable..." >&2
if [[ ! -w "$OUT_DIR" ]]; then
    echo "[-] ERROR: '$OUT_DIR' isn't writable by current user" >&2
    exit 1
fi
echo "[*] Using destination directory = $OUT_DIR" >&2

# Do the backup:
adb backup -apk -obb -shared -system -all -f "$OUT_DIR/$FILENAME"

# retval=$?
# echo $retval
# if [ $? -eq 0 ]; then

#     echo "$(tail -1)"

#     osascript -e 'display notification "Android Backup completed" with title "Android ADB Backup"'
# else
#     echo FAIL
#     osascript -e 'display notification "Android Backup FAILED" with title "Android ADB Backup FAIL"'
# fi