mirror/trigger.py

#!/usr/bin/python
import os, re

# Given a file full of rsync output, scan through it for things that look like
# legitimate releases. Return the simplified triggers for each of those files.

matches = (
       	# The major tarballs
	r'linux-(2\.6\.\d+)\.tar\.bz2',
       	# Stable releases
	r'patch-(2\.6\.\d+\.\d+)\.bz2',
        # -rc releases
	r'patch-(2\.6\.\d+-rc\d+)\.bz2',
        # -git releases
        r'patch-(2\.6\.\d+(-rc\d+)?-git\d+).bz2',
	# -mm tree
	r'(2\.6\.\d+(-rc\d+)?-mm\d+)\.bz2',
	  )

compiled_matches = [re.compile(r) for r in matches]

def re_scan(pattern, line):
	"""
	First check to see whether the pattern matches.
			(eg. Does it match "linux-2.6.\d.tar.bz2" ?)
	Then we strip out the actual trigger itself from that, and return it.
			(eg. return "2.6.\d")
	Note that the pattern uses match, so you need the whole filename
	"""
	match = pattern.match(line)
	if match:
		return match.group(1)
	else:
		return None


def scan(input_file):
	triggers = []
	for line in open(input_file, 'r').readlines():
		for pattern in compiled_matches:
			file = os.path.basename(line)
			t = re_scan(pattern, file)
			if t:
				triggers.append(t)
	return triggers