def test_policy(self):
apt_pkg.config["dir"] = "data/test_debs"
cache = apt_pkg.Cache(None)
policy = apt_pkg.Policy(cache)
file_unicode = os.path.join(self.dir_unicode, u"test.prefs")
file_bytes = os.path.join(self.dir_bytes, b"test.prefs")
self.assertTrue(policy.read_pinfile(file_unicode))
self.assertTrue(policy.read_pinfile(file_bytes))
self.assertTrue(policy.read_pindir(self.dir_unicode))
self.assertTrue(policy.read_pindir(self.dir_bytes))
def get_deb_versions_info(apt_pkg=None) -> Optional[DebVersionsInfo]:
"""Return versions information for Debian-based MAAS."""
if apt_pkg is None:
import apt_pkg
apt_pkg.init()
try:
cache = apt_pkg.Cache(None)
except SystemError:
maaslog.error(
"Installed version could not be determined. Ensure "
"/var/lib/dpkg/status is valid."
)
return None
depcache = apt_pkg.DepCache(cache)
sources = apt_pkg.SourceList()
sources.read_main_list()
policy = apt_pkg.Policy(cache)
policy.init_defaults()
current, update, = (
None,
None,
)
for package in MAAS_PACKAGES:
current, update = _get_deb_current_and_update(
cache, depcache, sources, policy, package
)
if current:
break
else:
return None
return DebVersionsInfo(current=current, update=update)