read-config.py

#!/usr/bin/env python3
# Yes, this is a Bad YAML Parser, but at this stage we are not in the
# venv and do not know what modules the user has available, so for
# maximum compatibility, we are just assuming a plain Python distribution.
import argparse
import re
import sys
import os
import glob

parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument('--sources',action='store_true')
group.add_argument('--family',action='store_true')
args = parser.parse_args()
sources = []

for config_file in glob.glob("sources/config*yaml"):
	with open(config_file) as config:
		data = config.read()

	if args.family:
		m = re.search(r"(?m)^familyName: (.*)", data)
		if m:
			print(m[1])
			sys.exit(0)
		else:
			print("Could not determine family name from config file!")
			sys.exit(1)

	toggle = False
	for line in data.splitlines():
		if re.match("^sources:", line):
			toggle = True
			continue
		if toggle:
			m = re.match(r"^\s*-\s*(.*)", line)
			if m:
				sources.append("sources/"+m[1])
			else:
				toggle = False

if sources:
	print(" ".join(sources))
	sys.exit(0)
else:
	print("Could not determine sources from config file!")
	sys.exit(1)