#!/usr/bin/python

import os, sys, subprocess, smtplib, re

#
# entry point
#

if len(sys.argv) > 2 or len(sys.argv) == 1 and sys.stdin.isatty():
    print '''Usage: requestsponsor [<debdiff>]

File a sponsoring request bug with the given debdiff. If a debdiff is not
specified as command line argument, it reads stdin.'''
    sys.exit (1)

if len(sys.argv) == 1:
    # read stdin
    diff = sys.stdin.read()
else:
    diff = open(sys.argv[1]).read()

# parse diff for source package name
changelog_header_re = re.compile('^\+([\w.-]+) \([\w.:+-]+\) ([\w-]+); urgency')
in_changelog = False
package = None
release = None
for l in diff.splitlines():
    if l.startswith('+++ '):
	in_changelog = l.endswith('/debian/changelog')
    if in_changelog:
	m = changelog_header_re.match(l)
	if m:
	    package = m.group(1)
	    release = m.group(2)
	    break

assert package
assert release

# strip pocket from  release
release = release.split('-')[0]

# determine team (main/universe)
if subprocess.call('apt-cache madison %s | \
    egrep -q "%s/(main|restricted).*Sources"' % (package, release), shell=True) == 0:
    team = 'ubuntu-main-sponsors'
else:
    team = 'ubuntu-universe-sponsors'

print 'Filing bug against package', package, 'to team', team

# generate bug report
mailbody = ''' affects ubuntu/%s
 subscribe %s

%s
''' % (package, team, diff)

# sign it
sign_command = 'gpg'
if os.access('/usr/bin/gnome-gpg', os.X_OK):
    sign_command = 'gnome-gpg'

gpg = subprocess.Popen([sign_command, '--clearsign'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
signed_mailbody = gpg.communicate(mailbody)[0]
assert gpg.returncode == 0

# generate email
myemailaddr = os.getenv('DEBEMAIL')
assert myemailaddr
to = 'new@bugs.launchpad.net'

mail = '''From: %s
To: %s
Subject: Please sponsor %s upload

%s''' % (myemailaddr, to, package, signed_mailbody)

s = smtplib.SMTP()
s.connect()
s.sendmail(myemailaddr, to, mail)
s.close()