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# 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"""Distribution data outdated."""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(DistroDataOutdated, self).__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"Distribution data outdated.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 DistroInfo(object):
"""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")
csvfile = open(filename)
csv_reader = csv.DictReader(csvfile)
self._rows = []
for row in csv_reader:
for column in ("created", "release", "eol", "eol-server",
"eol-esm"):
if column in row:
row[column] = convert_date(row[column])
self._rows.append(row)
csvfile.close()
self._date = datetime.date.today()
@property
def all(self, result="codename"):
"""List all known distributions."""
return [self._format(result, x) for x in self._rows]
def _avail(self, date):
"""Return all distributions that were available on the given date."""
return [x for x in self._rows if date >= x["created"]]
def codename(self, release, date=None, default=None):
"""Map codename aliases to the codename they describe."""
return release
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, row):
"""Format a given distribution entry."""
if format_string == "codename":
return row["series"]
elif format_string == "fullname":
return self._distro + " " + row["version"] + ' "' + \
row["codename"] + '"'
elif format_string == "release":
return row["version"]
else:
raise ValueError("Only codename, fullname, 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(DebianDistroInfo, self).__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 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(UbuntuDistroInfo, self).__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._rows if x["version"].find("LTS") >= 0 and
date >= x["release"] and
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._rows 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
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