CasperSecurity
# Copyright (C) 2009-2012, Benjamin Drung <bdrung@debian.org>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
"""provides information about Ubuntu's and Debian's distributions"""
import csv
import datetime
import os
def convert_date(string):
"""Convert a date string in ISO 8601 into a datetime object."""
if not string:
date = None
else:
parts = [int(x) for x in string.split("-")]
if len(parts) == 3:
(year, month, day) = parts
date = datetime.date(year, month, day)
elif len(parts) == 2:
(year, month) = parts
if month == 12:
date = datetime.date(year, month, 31)
else:
date = datetime.date(year, month + 1, 1) - datetime.timedelta(1)
else:
raise ValueError("Date not in ISO 8601 format.")
return date
def _get_data_dir():
"""Get the data directory based on the module location."""
return "/usr/share/distro-info"
class DistroDataOutdated(Exception):
"""Distribution data outdated."""
def __init__(self):
super().__init__(
"Distribution data outdated. Please check for an update for distro-info-data. "
"See /usr/share/doc/distro-info-data/README.Debian for details."
)
class DistroRelease:
"""Represents a distributions release"""
# pylint: disable=too-few-public-methods
# pylint: disable=too-many-instance-attributes
def __init__(
self,
version,
codename,
series,
created=None,
release=None,
eol=None,
eol_esm=None,
eol_lts=None,
eol_elts=None,
eol_server=None,
):
# pylint: disable=too-many-arguments
self.version = version
self.codename = codename
self.series = series
self.created = created
self.release = release
self.eol = eol
self.eol_lts = eol_lts
self.eol_elts = eol_elts
self.eol_esm = eol_esm
self.eol_server = eol_server
def is_supported(self, date):
"""Check whether this release is supported on the given date."""
return date >= self.created and (
self.eol is None
or date <= self.eol
or (self.eol_server is not None and date <= self.eol_server)
)
def _get_date(row, column):
return convert_date(row[column]) if column in row else None
class DistroInfo:
"""Base class for distribution information.
Use DebianDistroInfo or UbuntuDistroInfo instead of using this directly.
"""
def __init__(self, distro):
self._distro = distro
filename = os.path.join(_get_data_dir(), distro.lower() + ".csv")
with open(filename, encoding="utf-8") as csvfile:
csv_reader = csv.DictReader(csvfile)
self._releases = []
for row in csv_reader:
release = DistroRelease(
row["version"],
row["codename"],
row["series"],
_get_date(row, "created"),
_get_date(row, "release"),
_get_date(row, "eol"),
_get_date(row, "eol-esm"),
_get_date(row, "eol-lts"),
_get_date(row, "eol-elts"),
_get_date(row, "eol-server"),
)
self._releases.append(release)
self._date = datetime.date.today()
@property
def all(self):
"""List codenames of all known distributions."""
return [x.series for x in self._releases]
def get_all(self, result="codename"):
"""List all known distributions."""
return [self._format(result, x) for x in self._releases]
def _avail(self, date):
"""Return all distributions that were available on the given date."""
return [x for x in self._releases if date >= x.created]
def codename(self, release, date=None, default=None):
"""Map codename aliases to the codename they describe."""
# pylint: disable=no-self-use,unused-argument
return release
def version(self, name, default=None):
"""Map codename or series to version"""
for release in self._releases:
if name in (release.codename, release.series):
return release.version
return default
def devel(self, date=None, result="codename"):
"""Get latest development distribution based on the given date."""
if date is None:
date = self._date
distros = [
x
for x in self._avail(date)
if x.release is None or (date < x.release and (x.eol is None or date <= x.eol))
]
if not distros:
raise DistroDataOutdated()
return self._format(result, distros[-1])
def _format(self, format_string, release):
"""Format a given distribution entry."""
if format_string == "object":
return release
if format_string == "codename":
return release.series
if format_string == "fullname":
return self._distro + " " + release.version + ' "' + release.codename + '"'
if format_string == "release":
return release.version
raise ValueError(
"Only codename, fullname, object, and release are allowed "
"result values, but not '" + format_string + "'."
)
def stable(self, date=None, result="codename"):
"""Get latest stable distribution based on the given date."""
if date is None:
date = self._date
distros = [
x
for x in self._avail(date)
if x.release is not None and date >= x.release and (x.eol is None or date <= x.eol)
]
if not distros:
raise DistroDataOutdated()
return self._format(result, distros[-1])
def supported(self, date=None, result=None):
"""Get list of all supported distributions based on the given date."""
raise NotImplementedError()
def valid(self, codename):
"""Check if the given codename is known."""
return codename in self.all
def unsupported(self, date=None, result="codename"):
"""Get list of all unsupported distributions based on the given date."""
if date is None:
date = self._date
supported = self.supported(date)
distros = [self._format(result, x) for x in self._avail(date) if x.series not in supported]
return distros
class DebianDistroInfo(DistroInfo):
"""provides information about Debian's distributions"""
def __init__(self):
super().__init__("Debian")
def codename(self, release, date=None, default=None):
"""Map 'unstable', 'testing', etc. to their codenames."""
if release == "unstable":
codename = self.devel(date)
elif release == "testing":
codename = self.testing(date)
elif release == "stable":
codename = self.stable(date)
elif release == "oldstable":
codename = self.old(date)
else:
codename = default
return codename
def devel(self, date=None, result="codename"):
"""Get latest development distribution based on the given date."""
if date is None:
date = self._date
distros = [
x
for x in self._avail(date)
if x.release is None or (date < x.release and (x.eol is None or date <= x.eol))
]
if len(distros) < 2:
raise DistroDataOutdated()
return self._format(result, distros[-2])
def old(self, date=None, result="codename"):
"""Get old (stable) Debian distribution based on the given date."""
if date is None:
date = self._date
distros = [x for x in self._avail(date) if x.release is not None and date >= x.release]
if len(distros) < 2:
raise DistroDataOutdated()
return self._format(result, distros[-2])
def supported(self, date=None, result="codename"):
"""Get list of all supported Debian distributions based on the given
date."""
if date is None:
date = self._date
distros = [
self._format(result, x) for x in self._avail(date) if x.eol is None or date <= x.eol
]
return distros
def lts_supported(self, date=None, result="codename"):
"""Get list of all LTS supported Debian distributions based on the given
date."""
if date is None:
date = self._date
distros = [
self._format(result, x)
for x in self._avail(date)
if (x.eol is not None and date > x.eol)
and (x.eol_lts is not None and date <= x.eol_lts)
]
return distros
def elts_supported(self, date=None, result="codename"):
"""Get list of all Extended LTS supported Debian distributions based on
the given date."""
if date is None:
date = self._date
distros = [
self._format(result, x)
for x in self._avail(date)
if (x.eol_lts is not None and date > x.eol_lts)
and (x.eol_elts is not None and date <= x.eol_elts)
]
return distros
def testing(self, date=None, result="codename"):
"""Get latest testing Debian distribution based on the given date."""
if date is None:
date = self._date
distros = [
x
for x in self._avail(date)
if (x.release is None and x.version)
or (x.release is not None and date < x.release and (x.eol is None or date <= x.eol))
]
if not distros:
raise DistroDataOutdated()
return self._format(result, distros[-1])
def valid(self, codename):
"""Check if the given codename is known."""
return DistroInfo.valid(self, codename) or codename in [
"unstable",
"testing",
"stable",
"oldstable",
]
class UbuntuDistroInfo(DistroInfo):
"""provides information about Ubuntu's distributions"""
def __init__(self):
super().__init__("Ubuntu")
def lts(self, date=None, result="codename"):
"""Get latest long term support (LTS) Ubuntu distribution based on the
given date."""
if date is None:
date = self._date
distros = [
x for x in self._releases if x.version.find("LTS") >= 0 and x.release <= date <= x.eol
]
if not distros:
raise DistroDataOutdated()
return self._format(result, distros[-1])
def is_lts(self, codename):
"""Is codename an LTS release?"""
distros = [x for x in self._releases if x.series == codename]
if not distros:
return False
return "LTS" in distros[0].version
def supported(self, date=None, result="codename"):
"""Get list of all supported Ubuntu distributions based on the given
date."""
if date is None:
date = self._date
distros = [
self._format(result, x)
for x in self._avail(date)
if date <= x.eol or (x.eol_server is not None and date <= x.eol_server)
]
return distros
def supported_esm(self, date=None, result="codename"):
"""Get list of all ESM supported Ubuntu distributions based on the
given date."""
if date is None:
date = self._date
distros = [
self._format(result, x)
for x in self._avail(date)
if x.eol_esm is not None and date <= x.eol_esm
]
return distros