#!/usr/bin/python

import subprocess, re, sys

lpbugs_re = re.compile(r'lp: #([0-9, ]+)', re.I)

bzr = subprocess.Popen(['bzr', 'diff', 'NEWS'], stdout=subprocess.PIPE)
raw_msg = bzr.communicate()[0].strip()
if bzr.returncode != 1:
    print >> sys.stderr, 'bzr diff NEWS failed'
    sys.exit(1)

# parse/format message
msg = ''
for l in raw_msg.splitlines():
    if not l.startswith('+ '):
	continue
    if msg:
	msg += ' '
    msg += l[2:].strip()

if msg.startswith('-'):
    msg = msg[1:].strip()

print '-- commit message: --'
print msg
print '---'

if not msg:
    print >> sys.stderr, 'No message in NEWS, aborting'
    sys.exit(1)

# parse Launchpad bugs
lpbugs = []
for b_grp in lpbugs_re.finditer(msg):
    for b in b_grp.group(1).split(','):
	lpbugs.append(b.strip())
print 'Fixed LP bugs:', ' '.join(lpbugs)

# commit
argv = ['bzr', 'commit', '-m', msg]
for b in lpbugs:
    argv += ['--fixes', 'lp:' + b]
argv += sys.argv[1:]

sys.exit(subprocess.call(argv))