modrewrite_parser.py

#!/usr/bin/env python
import re
import sys


REGEX = re.compile(r"^RewriteRule ([^ ]+) (.+?) \[([^\]]+)]")

def process_line(line):
	if not line:
		return
	sre = REGEX.match(line)
	assert sre, line
	source, target, flags = sre.groups()
	flags = flags.split(",")

	return source, target, flags


def main():
	with open(sys.argv[1], "r") as f:
		for line in f.readlines():
			if line.startswith("RewriteRule "):
				source, target, flags = process_line(line.strip())
				print(source, target, flags)
				is_regex = ".+" in source
				if not is_regex:
					if source.startswith("^"):
						source = source[1:]
					if source.endswith("$"):
						source = source[:-1]
					source = source.replace("\\", "")
					if source.startswith("(?i)"):
						# case insensitive
						source = source[4:]
						if source.endswith("(?-i)"):
							source = source[:-5]
					print("Source is now %r" % (source))
					if target.startswith("{{ url }}"):
						...
				else:
					... # good luck


if __name__ == "__main__":
	main()