howdy/debian/postinst

#!/usr/bin/python3
# Installation script to install howdy
# Executed after primary apt install

def col(id):
	"""Add color escape sequences"""
	if id == 1: return "\033[32m"
	if id == 2: return "\033[33m"
	if id == 3: return "\033[31m"
	return "\033[0m"

# Import required modules
import subprocess
import time
import sys
import os
import re
import signal
import fileinput
import urllib.parse

# Don't run unless we need to configure the install
# Will also happen on upgrade but we will catch that later on
if "configure" not in sys.argv:
	sys.exit(0)


def log(text):
	"""Print a nicely formatted line to stdout"""
	print("\n>>> " + col(1) + text + col(0) + "\n")

def handleStatus(status):
	"""Abort if a command fails"""
	if (status != 0):
		print(col(3) + "Error while running last command" + col(0))
		sys.exit(1)


# We're not in fresh configuration mode so don't continue the setup
if not os.path.exists("/tmp/howdy_picked_device"):
	# Check if we have an older config we can restore
	if len(sys.argv) > 2:
		if os.path.exists("/tmp/howdy_config_backup_v" + sys.argv[2] + ".ini"):
			# Get the config parser
			import configparser

			# Load th old and new config files
			oldConf = configparser.ConfigParser()
			oldConf.read("/tmp/howdy_config_backup_v" + sys.argv[2] + ".ini")
			newConf = configparser.ConfigParser()
			newConf.read("/lib/security/howdy/config.ini")

			# Go through every setting in the old config and apply it to the new file
			for section in oldConf.sections():
				for (key, value) in oldConf.items(section):

					# MIGRATION 2.3.1 -> 2.4.0
					# If config is still using the old device_id parameter, convert it to a path
					if key == "device_id":
						key = "device_path"
						value = "/dev/video" + value

					# MIGRATION 2.4.0 -> 2.5.0
					# Finally correct typo in "timout" config value
					if key == "timout":
						key = "timeout"

					try:
						newConf.set(section, key, value)
					# Add a new section where needed
					except configparser.NoSectionError as e:
						newConf.add_section(section)
						newConf.set(section, key, value)

			# Write it all to file
			with open("/lib/security/howdy/config.ini", "w") as configfile:
				newConf.write(configfile)

	sys.exit(0)

# Open the temporary file containing the device ID
in_file = open("/tmp/howdy_picked_device", "r")
# Load it in, it should be a string
picked = in_file.read()
in_file.close()

# Remove the temporary file
subprocess.call(["rm /tmp/howdy_picked_device"], shell=True)

log("Upgrading pip to the latest version")

# Update pip
handleStatus(subprocess.call(["pip3 install --upgrade pip"], shell=True))

log("Cloning dlib")

# Clone the dlib git to /tmp, but only the last commit
handleStatus(subprocess.call(["git", "clone", "--depth", "1", "https://github.com/davisking/dlib.git", "/tmp/dlib_clone"]))

log("Building dlib")

# Start the build without GPU
handleStatus(subprocess.call(["cd /tmp/dlib_clone/; python3 setup.py install --yes USE_AVX_INSTRUCTIONS --no DLIB_USE_CUDA"], shell=True))

log("Cleaning up dlib")

# Remove the no longer needed git clone
handleStatus(subprocess.call(["rm", "-rf", "/tmp/dlib_clone"]))
print("Temporary dlib files removed")

log("Installing python dependencies")

# Install direct dependencies so pip does not freak out with the manual dlib install
handleStatus(subprocess.call(["pip3", "install", "--cache-dir", "/tmp/pip_howdy", "face_recognition_models==0.3.0", "Click>=6.0", "numpy", "Pillow"]))

log("Installing face_recognition")

# Install face_recognition though pip
handleStatus(subprocess.call(["pip3", "install", "--cache-dir", "/tmp/pip_howdy", "--no-deps", "face_recognition==1.2.2"]))

try:
	import cv2
except Exception as e:
	log("Reinstalling opencv2")
	handleStatus(subprocess.call(["pip3", "install", "opencv-python"]))

log("Configuring howdy")

# Manually change the camera id to the one picked
for line in fileinput.input(["/lib/security/howdy/config.ini"], inplace = 1):
	print(line.replace("device_path = none", "device_path = " + picked), end="")
print("Camera ID saved")

# Secure the howdy folder
handleStatus(subprocess.call(["chmod 744 -R /lib/security/howdy/"], shell=True))

# Allow anyone to execute the python CLI
handleStatus(subprocess.call(["chmod 755 /lib/security/howdy"], shell=True))
handleStatus(subprocess.call(["chmod 755 /lib/security/howdy/cli.py"], shell=True))
handleStatus(subprocess.call(["chmod 755 -R /lib/security/howdy/cli"], shell=True))
print("Permissions set")

# Make the CLI executable as howdy
handleStatus(subprocess.call(["ln -s /lib/security/howdy/cli.py /usr/local/bin/howdy"], shell=True))
handleStatus(subprocess.call(["chmod +x /usr/local/bin/howdy"], shell=True))
print("Howdy command installed")

log("Adding howdy as PAM module")

# Activate the pam-config file
handleStatus(subprocess.call(["pam-auth-update --package"], shell=True))

# Sign off
print("Installation complete.")