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#! /usr/bin/python
#
# Copyright 2009 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
import os
import grp
import pwd
import sys
import errno
import socket
import tempfile
import subprocess
from canonical.config import config
from lp.services.mailman.config import (
configure_prefix, configure_siteowner)
from lp.services.mailman.monkeypatches import monkey_patch
from lazr.config import as_username_groupname
basepath = [part for part in sys.path if part]
def build_mailman():
# Build and install Mailman if it is enabled and not yet built.
if not config.mailman.build:
# There's nothing to do.
return 0
mailman_path = configure_prefix(config.mailman.build_prefix)
mailman_bin = os.path.join(mailman_path, 'bin')
var_dir = os.path.abspath(config.mailman.build_var_dir)
# If we can import the package, we assume Mailman is properly built and
# installed. This does not catch re-installs that might be necessary
# should our copy in sourcecode be updated. Do that manually.
sys.path.append(mailman_path)
try:
import Mailman
except ImportError:
pass
else:
return 0
# sys.path_importer_cache is a mapping of elements of sys.path to importer
# objects used to handle them. In Python2.5+ when an element of sys.path
# is found to not exist on disk, a NullImporter is created and cached -
# this causes Python to never bother re-inspecting the disk for that path
# element. We must clear that cache element so that our second attempt to
# import MailMan after building it will actually check the disk.
del sys.path_importer_cache[mailman_path]
# Make sure the target directories exist and have the correct
# permissions, otherwise configure will complain.
user, group = as_username_groupname(config.mailman.build_user_group)
# Now work backwards to get the uid and gid
try:
uid = pwd.getpwnam(user).pw_uid
except KeyError:
print >> sys.stderr, 'No user found:', user
sys.exit(1)
try:
gid = grp.getgrnam(group).gr_gid
except KeyError:
print >> sys.stderr, 'No group found:', group
sys.exit(1)
# Ensure that the var_dir exists, is owned by the user:group, and has
# the necessary permissions. Set the mode separately after the
# makedirs() call because some platforms ignore mkdir()'s mode (though
# I think Linux does not ignore it -- better safe than sorry).
try:
os.makedirs(var_dir)
except OSError, e:
if e.errno != errno.EEXIST:
raise
os.chown(var_dir, uid, gid)
os.chmod(var_dir, 02775)
mailman_source = os.path.join('sourcecode', 'mailman')
if config.mailman.build_host_name:
build_host_name = config.mailman.build_host_name
else:
build_host_name = socket.getfqdn()
# Build and install the Mailman software. Note that we don't care about
# --with-cgi-gid because we're not going to use that Mailman subsystem.
executable = os.path.abspath('bin/py')
configure_args = (
'./configure',
'--prefix', mailman_path,
'--with-var-prefix=' + var_dir,
'--with-python=' + executable,
'--with-username=' + user,
'--with-groupname=' + group,
'--with-mail-gid=' + group,
'--with-mailhost=' + build_host_name,
'--with-urlhost=' + build_host_name,
)
# Configure.
retcode = subprocess.call(configure_args, cwd=mailman_source)
if retcode:
print >> sys.stderr, 'Could not configure Mailman:'
sys.exit(retcode)
# Make.
retcode = subprocess.call(('make', ), cwd=mailman_source)
if retcode:
print >> sys.stderr, 'Could not make Mailman.'
sys.exit(retcode)
# We have a brief interlude before we install. Hardy will not
# accept a script as the executable for the shebang line--it will
# treat the file as a shell script instead. The ``bin/by``
# executable that we specified in '--with-python' above is a script
# so this behavior causes problems for us. Our work around is to
# prefix the ``bin/py`` script with ``/usr/bin/env``, which makes
# Hardy happy. We need to do this before we install because the
# installation will call Mailman's ``bin/update``, which is a script
# that needs this fix.
build_dir = os.path.join(mailman_source, 'build')
original = '#! %s\n' % (executable, )
modified = '#! /usr/bin/env %s\n' % (executable, )
for (dirpath, dirnames, filenames) in os.walk(build_dir):
for filename in filenames:
filename = os.path.join(dirpath, filename)
f = open(filename, 'r')
if f.readline() == original:
rest = f.read()
f.close()
f = open(filename, 'w')
f.write(modified)
f.write(rest)
f.close()
# Now we actually install.
retcode = subprocess.call(('make', 'install'), cwd=mailman_source)
if retcode:
print >> sys.stderr, 'Could not install Mailman.'
sys.exit(retcode)
# Try again to import the package.
try:
# pylint: disable-msg=W0404
import Mailman
except ImportError:
print >> sys.stderr, 'Could not import the Mailman package'
return 1
# Check to see if the site list exists. The output can go to /dev/null
# because we don't really care about it. The site list exists if
# config_list returns a zero exit status, otherwise it doesn't
# (probably). Before we can do this however, we must monkey patch
# Mailman, otherwise mm_cfg.py won't be set up correctly.
monkey_patch(mailman_path, config)
import Mailman.mm_cfg
retcode = subprocess.call(
('./config_list', '-o', '/dev/null',
Mailman.mm_cfg.MAILMAN_SITE_LIST),
cwd=mailman_bin,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if retcode:
addr, password = configure_siteowner(
config.mailman.build_site_list_owner)
# The site list does not yet exist, so create it now.
retcode = subprocess.call(
('./newlist', '--quiet',
'--emailhost=' + build_host_name,
Mailman.mm_cfg.MAILMAN_SITE_LIST,
addr, password),
cwd=mailman_bin)
if retcode:
print >> sys.stderr, 'Could not create site list'
return retcode
retcode = configure_site_list(
mailman_bin, Mailman.mm_cfg.MAILMAN_SITE_LIST)
if retcode:
print >> sys.stderr, 'Could not configure site list'
return retcode
# Create a directory to hold the gzip'd tarballs for the directories of
# deactivated lists.
try:
os.mkdir(os.path.join(Mailman.mm_cfg.VAR_PREFIX, 'backups'))
except OSError, e:
if e.errno != errno.EEXIST:
raise
return 0
def configure_site_list(mailman_bin, site_list_name):
"""Configure the site list.
Currently, the only thing we want to set is to not advertise the
site list.
"""
fd, config_file_name = tempfile.mkstemp()
try:
os.close(fd)
config_file = open(config_file_name, 'w')
try:
print >> config_file, 'advertised = False'
finally:
config_file.close()
return subprocess.call(
('./config_list', '-i', config_file_name, site_list_name),
cwd=mailman_bin)
finally:
os.remove(config_file_name)
def main():
# setting python paths
program = sys.argv[0]
src = 'lib'
here = os.path.dirname(os.path.abspath(program))
srcdir = os.path.join(here, src)
sys.path = [srcdir, here] + basepath
return build_mailman()
if __name__ == '__main__':
return_code = main()
sys.exit(return_code)
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