Automatic Phone Backup (via udev and systemd)

99-phonebackup.rules

ACTION=="add", ENV{ID_SERIAL}=="*?", RUN+="/home/astraluma/udev-handler"

backup.sh

#!/bin/sh

set -ex

cd /home/astraluma/suraya
git annex unlock sdcard
adb pull -a /sdcard
git annex add sdcard
git annex sync --content

udev-handler.py

#!/usr/bin/python3
import logging
import logging.handlers
logging.basicConfig(
  handlers=[logging.handlers.SysLogHandler(address='/dev/log')],
  format="%(name)s %(message)s",
  level=0,
)

logger = logging.getLogger()

try:

  import os
  import sys
  import subprocess

  if os.environ['ACTION'] == 'add' and os.environ['ID_SERIAL'] == "Google_Pixel_2_XL_801KPXV1506706":
    logger.info("Starting backup")
    cmd = subprocess.run(
      ['systemd-run', '--uid=astraluma', '--no-ask-password', '/home/astraluma/backup'],
      stdin=subprocess.DEVNULL,
      stdout=subprocess.PIPE,
      stderr=subprocess.STDOUT,
    )
    logger.debug("systemd-run (%i):\n%s", cmd.returncode, cmd.stdout.decode('ascii'))
except Exception as e:
  logger.exception("Exception raised: %r", e)
  raise