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#!/usr/bin/env python
# Copyright 2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

import itertools
import optparse
import os
import re
import subprocess
import sys

import bugz.bugzilla
import portage.versions

BUG_REGEX = re.compile("[Bb]ug #?(\d+)")

def print_and_log(message, log):
	try:
		print message
		log.write(message + '\n')
	finally:
		log.flush()

def run_command(args, cwd, log):
	try:
		log.write("Running %r in %s...\n" % (args, cwd))
		cmd  = subprocess.Popen(args, cwd=cwd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
		output = cmd.communicate()[0]
		log.write("Finished with exit code %d\n" % cmd.returncode)
		log.write(output)
		return (cmd.returncode, output)
	finally:
		log.flush()

class MyBugz(bugz.bugzilla.Bugz):
	def get_input(self, prompt):
		return raw_input(prompt)

if __name__ == "__main__":
	parser = optparse.OptionParser()
	parser.add_option("--arch", dest="arch", help="Gentoo arch to use, e.g. x86, amd64, ...")
	parser.add_option("-i", "--input", dest="input_filename", default="package.keywords", help="Input filename for generated package.keywords file [default=%default]")
	parser.add_option("--repo", dest="repo", help="Path to portage CVS repository")
	parser.add_option("-v", "--verbose", dest="verbose", action="store_true", default=False)

	(options, args) = parser.parse_args()
	if not options.arch:
		parser.error("--arch option is required")
	if not options.input_filename:
		parser.error("--input option is required")
	if not options.repo:
		parser.error("--repo option is required")
	if args:
		parser.error("unrecognized command-line args")

	url = 'https://bugs.gentoo.org'
	print 'You may be prompted for your Gentoo Bugzilla username and password (%s).' % url
	bugzilla = MyBugz(url)
	bugzilla.auth()
	
	with open(options.input_filename, "r") as input_file:
		stabilization_dict = {}
		bug_id = -1
		for line in input_file:
			if line == "\n":
				continue

			if line.startswith("#"):
				match = BUG_REGEX.search(line, re.IGNORECASE)
				if not match:
					print 'Ignoring comment line [%s]...' % line
					continue
				else:
					bug_id = int(match.group(1))
				continue

			if bug_id == -1:
				print 'Could not recognize bug id'
				sys.exit(1)

			if not line.endswith("\n"):
				line += "\n"
			cpv = line[1:-1]
			p = portage.versions.catsplit(cpv)[1]
			pn = portage.versions.pkgsplit(cpv)[0]
			ebuild_name = p + ".ebuild"
			if bug_id not in stabilization_dict:
				stabilization_dict[bug_id] = []
			stabilization_dict[bug_id].append((pn, ebuild_name))

		# Sanity check.
		success = True
		for bug_id in stabilization_dict:
			for (pn, ebuild_name) in stabilization_dict[bug_id]:
				ebuild_path = os.path.join(options.repo, pn, ebuild_name)
				if not os.path.exists(ebuild_path):
					print '%s: file does not exist' % ebuild_path
					success = False
		if not success:
			print 'Sanity check failed. Please make sure your CVS repo is up to date (cvs up).'
			sys.exit(1)

		with open('batch-stabilize.log', 'w') as log_file:
			for bug_id in stabilization_dict:
				print_and_log('Working on bug %d...' % bug_id, log_file)
				commit_message = "%s stable wrt bug #%d" % (options.arch, bug_id)
				for (pn, ebuild_name) in stabilization_dict[bug_id]:
					cvs_path = os.path.join(options.repo, pn)
					print_and_log('Working in %s...' % cvs_path, log_file)
					if run_command(["cvs", "up"], cvs_path, log_file)[0] != 0:
						print '!!! cvs up failed'
						sys.exit(1)
					if run_command(["ekeyword", options.arch, ebuild_name], cvs_path, log_file)[0] != 0:
						print '!!! ekeyword failed'
						sys.exit(1)
				for (pn, ebuild_name) in stabilization_dict[bug_id]:
					cvs_path = os.path.join(options.repo, pn)
					print_and_log('Working in %s...' % cvs_path, log_file)
					return_code, output = run_command(["cvs", "diff"], cvs_path, log_file)
					# It seems that cvs diff returns 1 if there are differences.
					if return_code == 0 and not output:
						print_and_log('Seems already keyworded, skipping.', log_file)
						continue
					if run_command(["echangelog", commit_message], cvs_path, log_file)[0] != 0:
						print '!!! echangelog failed'
						sys.exit(1)
					if run_command(["repoman", "manifest"], cvs_path, log_file)[0] != 0:
						print '!!! repoman manifest failed'
						sys.exit(1)
					if run_command(["repoman", "commit", "-m", commit_message], cvs_path, log_file)[0] != 0:
						print '!!! repoman commit failed'
						sys.exit(1)
				bug_xml = bugzilla.get(bug_id).find('bug')
				has_my_arch = False
				has_other_arches = False
				for cc in bug_xml.findall('cc'):
					body, domain = cc.text.split('@', 1)
					if domain == 'gentoo.org' and body == options.arch:
						has_my_arch = True
					if domain == 'gentoo.org' and body in portage.archlist and body != options.arch:
						has_other_arches=True

				if not has_my_arch:
					print_and_log('Seems that bugzilla has already been updated.', log_file)
					continue

				print_and_log('Posting automated reply in bugzilla...', log_file)
				# We don't close bugs which still have other arches for obvious reasons,
				# and security bugs because stabilization is not the last step for them.
				if has_other_arches or 'Security' in bug_xml.find('product').text:
					bugzilla.modify(
						bug_id,
						comment='%s stable' % options.arch,
						remove_cc='%s@gentoo.org' % options.arch)
					print_and_log('Successfully updated bug %d.' % bug_id, log_file)
				else:
					bugzilla.modify(
						bug_id,
						comment='%s stable, closing' % options.arch,
						remove_cc='%s@gentoo.org' % options.arch,
						status='RESOLVED',
						resolution='FIXED')
					print_and_log('Succesfully updated bug %d and closed it.' % bug_id, log_file)