Copy downloaded microbit hex file using a folder action

Install Microbit Hex.workflow

import os
import sys
import shutil

# Watch for a .hex file to appear in the Downloads folder
# when we see it, copy it to the microbit and then eject the drive
# the microbit will reboot with the new code running

# To install:
# Open Automator, File->New, Folder Action, Add "Run shell script"
# choose /usr/bin/python for the shell, paste this entire script in
# Save as Install Microbit Hex
# then from finder, open your home folder
# right-click Downloads, Services->Folder Actions Setup
# click Enable Folder Actions
# hit + and add Downloads (or just make sure the checkbox is selected)
# on the right panel, hit + and choose the script you just made, make sure it's checked

for filename in sys.argv[1:]:
	if filename.endswith(".hex"):
		shutil.copy(filename, "/Volumes/MICROBIT/")
		os.system("diskutil unmount MICROBIT")