1101 lines
38 KiB
Python
1101 lines
38 KiB
Python
# Copyright 2015,2016 Nir Cohen
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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The ``distro`` package (``distro`` stands for Linux Distribution) provides
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information about the Linux distribution it runs on, such as a reliable
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machine-readable distro ID, or version information.
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It is a renewed alternative implementation for Python's original
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:py:func:`platform.linux_distribution` function, but it provides much more
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functionality. An alternative implementation became necessary because Python
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3.5 deprecated this function, and Python 3.7 is expected to remove it
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altogether. Its predecessor function :py:func:`platform.dist` was already
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deprecated since Python 2.6 and is also expected to be removed in Python 3.7.
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Still, there are many cases in which access to Linux distribution information
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is needed. See `Python issue 1322 <https://bugs.python.org/issue1322>`_ for
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more information.
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"""
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import os
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import re
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import sys
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import json
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import shlex
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import logging
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import argparse
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import subprocess
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if not sys.platform.startswith('linux'):
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raise ImportError('Unsupported platform: {0}'.format(sys.platform))
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_UNIXCONFDIR = os.environ.get('UNIXCONFDIR', '/etc')
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_OS_RELEASE_BASENAME = 'os-release'
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#: Translation table for normalizing the "ID" attribute defined in os-release
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#: files, for use by the :func:`distro.id` method.
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#:
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#: * Key: Value as defined in the os-release file, translated to lower case,
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#: with blanks translated to underscores.
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#:
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#: * Value: Normalized value.
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NORMALIZED_OS_ID = {}
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#: Translation table for normalizing the "Distributor ID" attribute returned by
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#: the lsb_release command, for use by the :func:`distro.id` method.
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#:
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#: * Key: Value as returned by the lsb_release command, translated to lower
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#: case, with blanks translated to underscores.
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#:
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#: * Value: Normalized value.
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NORMALIZED_LSB_ID = {
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'enterpriseenterprise': 'oracle', # Oracle Enterprise Linux
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'redhatenterpriseworkstation': 'rhel', # RHEL 6, 7 Workstation
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'redhatenterpriseserver': 'rhel', # RHEL 6, 7 Server
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}
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#: Translation table for normalizing the distro ID derived from the file name
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#: of distro release files, for use by the :func:`distro.id` method.
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#:
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#: * Key: Value as derived from the file name of a distro release file,
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#: translated to lower case, with blanks translated to underscores.
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#:
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#: * Value: Normalized value.
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NORMALIZED_DISTRO_ID = {
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'redhat': 'rhel', # RHEL 6.x, 7.x
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}
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# Pattern for content of distro release file (reversed)
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_DISTRO_RELEASE_CONTENT_REVERSED_PATTERN = re.compile(
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r'(?:[^)]*\)(.*)\()? *(?:STL )?([\d.+\-a-z]*\d) *(?:esaeler *)?(.+)')
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# Pattern for base file name of distro release file
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_DISTRO_RELEASE_BASENAME_PATTERN = re.compile(
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r'(\w+)[-_](release|version)$')
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# Base file names to be ignored when searching for distro release file
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_DISTRO_RELEASE_IGNORE_BASENAMES = (
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'debian_version',
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'lsb-release',
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'oem-release',
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_OS_RELEASE_BASENAME,
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'system-release'
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)
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def linux_distribution(full_distribution_name=True):
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"""
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Return information about the current Linux distribution as a tuple
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``(id_name, version, codename)`` with items as follows:
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* ``id_name``: If *full_distribution_name* is false, the result of
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:func:`distro.id`. Otherwise, the result of :func:`distro.name`.
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* ``version``: The result of :func:`distro.version`.
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* ``codename``: The result of :func:`distro.codename`.
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The interface of this function is compatible with the original
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:py:func:`platform.linux_distribution` function, supporting a subset of
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its parameters.
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The data it returns may not exactly be the same, because it uses more data
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sources than the original function, and that may lead to different data if
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the Linux distribution is not consistent across multiple data sources it
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provides (there are indeed such distributions ...).
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Another reason for differences is the fact that the :func:`distro.id`
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method normalizes the distro ID string to a reliable machine-readable value
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for a number of popular Linux distributions.
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"""
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return _distro.linux_distribution(full_distribution_name)
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def id():
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"""
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Return the distro ID of the current Linux distribution, as a
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machine-readable string.
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For a number of Linux distributions, the returned distro ID value is
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*reliable*, in the sense that it is documented and that it does not change
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across releases of the distribution.
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This package maintains the following reliable distro ID values:
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============== =========================================
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Distro ID Distribution
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============== =========================================
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"ubuntu" Ubuntu
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"debian" Debian
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"rhel" RedHat Enterprise Linux
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"centos" CentOS
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"fedora" Fedora
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"sles" SUSE Linux Enterprise Server
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"opensuse" openSUSE
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"amazon" Amazon Linux
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"arch" Arch Linux
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"cloudlinux" CloudLinux OS
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"exherbo" Exherbo Linux
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"gentoo" GenToo Linux
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"ibm_powerkvm" IBM PowerKVM
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"kvmibm" KVM for IBM z Systems
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"linuxmint" Linux Mint
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"mageia" Mageia
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"mandriva" Mandriva Linux
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"parallels" Parallels
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"pidora" Pidora
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"raspbian" Raspbian
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"oracle" Oracle Linux (and Oracle Enterprise Linux)
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"scientific" Scientific Linux
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"slackware" Slackware
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"xenserver" XenServer
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============== =========================================
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If you have a need to get distros for reliable IDs added into this set,
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or if you find that the :func:`distro.id` function returns a different
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distro ID for one of the listed distros, please create an issue in the
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`distro issue tracker`_.
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**Lookup hierarchy and transformations:**
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First, the ID is obtained from the following sources, in the specified
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order. The first available and non-empty value is used:
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* the value of the "ID" attribute of the os-release file,
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* the value of the "Distributor ID" attribute returned by the lsb_release
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command,
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* the first part of the file name of the distro release file,
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The so determined ID value then passes the following transformations,
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before it is returned by this method:
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* it is translated to lower case,
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* blanks (which should not be there anyway) are translated to underscores,
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* a normalization of the ID is performed, based upon
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`normalization tables`_. The purpose of this normalization is to ensure
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that the ID is as reliable as possible, even across incompatible changes
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in the Linux distributions. A common reason for an incompatible change is
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the addition of an os-release file, or the addition of the lsb_release
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command, with ID values that differ from what was previously determined
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from the distro release file name.
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"""
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return _distro.id()
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def name(pretty=False):
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"""
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Return the name of the current Linux distribution, as a human-readable
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string.
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If *pretty* is false, the name is returned without version or codename.
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(e.g. "CentOS Linux")
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If *pretty* is true, the version and codename are appended.
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(e.g. "CentOS Linux 7.1.1503 (Core)")
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**Lookup hierarchy:**
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The name is obtained from the following sources, in the specified order.
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The first available and non-empty value is used:
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* If *pretty* is false:
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- the value of the "NAME" attribute of the os-release file,
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- the value of the "Distributor ID" attribute returned by the lsb_release
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command,
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- the value of the "<name>" field of the distro release file.
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* If *pretty* is true:
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- the value of the "PRETTY_NAME" attribute of the os-release file,
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- the value of the "Description" attribute returned by the lsb_release
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command,
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- the value of the "<name>" field of the distro release file, appended
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with the value of the pretty version ("<version_id>" and "<codename>"
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fields) of the distro release file, if available.
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"""
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return _distro.name(pretty)
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def version(pretty=False, best=False):
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"""
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Return the version of the current Linux distribution, as a human-readable
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string.
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If *pretty* is false, the version is returned without codename (e.g.
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"7.0").
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If *pretty* is true, the codename in parenthesis is appended, if the
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codename is non-empty (e.g. "7.0 (Maipo)").
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Some distributions provide version numbers with different precisions in
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the different sources of distribution information. Examining the different
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sources in a fixed priority order does not always yield the most precise
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version (e.g. for Debian 8.2, or CentOS 7.1).
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The *best* parameter can be used to control the approach for the returned
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version:
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If *best* is false, the first non-empty version number in priority order of
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the examined sources is returned.
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If *best* is true, the most precise version number out of all examined
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sources is returned.
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**Lookup hierarchy:**
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In all cases, the version number is obtained from the following sources.
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If *best* is false, this order represents the priority order:
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* the value of the "VERSION_ID" attribute of the os-release file,
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* the value of the "Release" attribute returned by the lsb_release
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command,
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* the version number parsed from the "<version_id>" field of the first line
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of the distro release file,
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* the version number parsed from the "PRETTY_NAME" attribute of the
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os-release file, if it follows the format of the distro release files.
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* the version number parsed from the "Description" attribute returned by
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the lsb_release command, if it follows the format of the distro release
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files.
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"""
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return _distro.version(pretty, best)
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def version_parts(best=False):
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"""
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Return the version of the current Linux distribution as a tuple
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``(major, minor, build_number)`` with items as follows:
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* ``major``: The result of :func:`distro.major_version`.
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* ``minor``: The result of :func:`distro.minor_version`.
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* ``build_number``: The result of :func:`distro.build_number`.
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For a description of the *best* parameter, see the :func:`distro.version`
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method.
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"""
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return _distro.version_parts(best)
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def major_version(best=False):
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"""
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Return the major version of the current Linux distribution, as a string,
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if provided.
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Otherwise, the empty string is returned. The major version is the first
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part of the dot-separated version string.
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For a description of the *best* parameter, see the :func:`distro.version`
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method.
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"""
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return _distro.major_version(best)
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def minor_version(best=False):
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"""
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Return the minor version of the current Linux distribution, as a string,
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if provided.
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Otherwise, the empty string is returned. The minor version is the second
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part of the dot-separated version string.
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For a description of the *best* parameter, see the :func:`distro.version`
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method.
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"""
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return _distro.minor_version(best)
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def build_number(best=False):
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"""
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Return the build number of the current Linux distribution, as a string,
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if provided.
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Otherwise, the empty string is returned. The build number is the third part
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of the dot-separated version string.
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For a description of the *best* parameter, see the :func:`distro.version`
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method.
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"""
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return _distro.build_number(best)
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def like():
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"""
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Return a space-separated list of distro IDs of distributions that are
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closely related to the current Linux distribution in regards to packaging
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and programming interfaces, for example distributions the current
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distribution is a derivative from.
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**Lookup hierarchy:**
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This information item is only provided by the os-release file.
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For details, see the description of the "ID_LIKE" attribute in the
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`os-release man page
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<http://www.freedesktop.org/software/systemd/man/os-release.html>`_.
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"""
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return _distro.like()
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def codename():
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"""
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Return the codename for the release of the current Linux distribution,
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as a string.
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If the distribution does not have a codename, an empty string is returned.
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Note that the returned codename is not always really a codename. For
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example, openSUSE returns "x86_64". This function does not handle such
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cases in any special way and just returns the string it finds, if any.
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**Lookup hierarchy:**
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* the codename within the "VERSION" attribute of the os-release file, if
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provided,
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* the value of the "Codename" attribute returned by the lsb_release
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command,
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* the value of the "<codename>" field of the distro release file.
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"""
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return _distro.codename()
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def info(pretty=False, best=False):
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"""
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Return certain machine-readable information items about the current Linux
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distribution in a dictionary, as shown in the following example:
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.. sourcecode:: python
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{
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'id': 'rhel',
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'version': '7.0',
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'version_parts': {
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'major': '7',
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'minor': '0',
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'build_number': ''
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},
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'like': 'fedora',
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'codename': 'Maipo'
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}
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The dictionary structure and keys are always the same, regardless of which
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information items are available in the underlying data sources. The values
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for the various keys are as follows:
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* ``id``: The result of :func:`distro.id`.
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* ``version``: The result of :func:`distro.version`.
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* ``version_parts -> major``: The result of :func:`distro.major_version`.
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* ``version_parts -> minor``: The result of :func:`distro.minor_version`.
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* ``version_parts -> build_number``: The result of
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:func:`distro.build_number`.
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* ``like``: The result of :func:`distro.like`.
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* ``codename``: The result of :func:`distro.codename`.
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For a description of the *pretty* and *best* parameters, see the
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:func:`distro.version` method.
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"""
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return _distro.info(pretty, best)
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def os_release_info():
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"""
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Return a dictionary containing key-value pairs for the information items
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from the os-release file data source of the current Linux distribution.
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See `os-release file`_ for details about these information items.
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"""
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return _distro.os_release_info()
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def lsb_release_info():
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"""
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Return a dictionary containing key-value pairs for the information items
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from the lsb_release command data source of the current Linux distribution.
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See `lsb_release command output`_ for details about these information
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items.
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"""
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return _distro.lsb_release_info()
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def distro_release_info():
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"""
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Return a dictionary containing key-value pairs for the information items
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from the distro release file data source of the current Linux distribution.
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See `distro release file`_ for details about these information items.
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"""
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return _distro.distro_release_info()
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def os_release_attr(attribute):
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"""
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Return a single named information item from the os-release file data source
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of the current Linux distribution.
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Parameters:
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* ``attribute`` (string): Key of the information item.
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Returns:
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* (string): Value of the information item, if the item exists.
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The empty string, if the item does not exist.
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See `os-release file`_ for details about these information items.
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"""
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return _distro.os_release_attr(attribute)
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def lsb_release_attr(attribute):
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"""
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Return a single named information item from the lsb_release command output
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data source of the current Linux distribution.
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Parameters:
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* ``attribute`` (string): Key of the information item.
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Returns:
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* (string): Value of the information item, if the item exists.
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The empty string, if the item does not exist.
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See `lsb_release command output`_ for details about these information
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items.
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"""
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return _distro.lsb_release_attr(attribute)
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def distro_release_attr(attribute):
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"""
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Return a single named information item from the distro release file
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data source of the current Linux distribution.
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Parameters:
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* ``attribute`` (string): Key of the information item.
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Returns:
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* (string): Value of the information item, if the item exists.
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The empty string, if the item does not exist.
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See `distro release file`_ for details about these information items.
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"""
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return _distro.distro_release_attr(attribute)
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class LinuxDistribution(object):
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"""
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Provides information about a Linux distribution.
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This package creates a private module-global instance of this class with
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default initialization arguments, that is used by the
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`consolidated accessor functions`_ and `single source accessor functions`_.
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By using default initialization arguments, that module-global instance
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returns data about the current Linux distribution (i.e. the distro this
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package runs on).
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Normally, it is not necessary to create additional instances of this class.
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However, in situations where control is needed over the exact data sources
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that are used, instances of this class can be created with a specific
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distro release file, or a specific os-release file, or without invoking the
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lsb_release command.
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"""
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def __init__(self,
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include_lsb=True,
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os_release_file='',
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distro_release_file=''):
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"""
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The initialization method of this class gathers information from the
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available data sources, and stores that in private instance attributes.
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Subsequent access to the information items uses these private instance
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attributes, so that the data sources are read only once.
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Parameters:
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* ``include_lsb`` (bool): Controls whether the
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`lsb_release command output`_ is included as a data source.
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|
|
If the lsb_release command is not available in the program execution
|
|
path, the data source for the lsb_release command will be empty.
|
|
|
|
* ``os_release_file`` (string): The path name of the
|
|
`os-release file`_ that is to be used as a data source.
|
|
|
|
An empty string (the default) will cause the default path name to
|
|
be used (see `os-release file`_ for details).
|
|
|
|
If the specified or defaulted os-release file does not exist, the
|
|
data source for the os-release file will be empty.
|
|
|
|
* ``distro_release_file`` (string): The path name of the
|
|
`distro release file`_ that is to be used as a data source.
|
|
|
|
An empty string (the default) will cause a default search algorithm
|
|
to be used (see `distro release file`_ for details).
|
|
|
|
If the specified distro release file does not exist, or if no default
|
|
distro release file can be found, the data source for the distro
|
|
release file will be empty.
|
|
|
|
Public instance attributes:
|
|
|
|
* ``os_release_file`` (string): The path name of the
|
|
`os-release file`_ that is actually used as a data source. The
|
|
empty string if no distro release file is used as a data source.
|
|
|
|
* ``distro_release_file`` (string): The path name of the
|
|
`distro release file`_ that is actually used as a data source. The
|
|
empty string if no distro release file is used as a data source.
|
|
|
|
Raises:
|
|
|
|
* :py:exc:`IOError`: Some I/O issue with an os-release file or distro
|
|
release file.
|
|
|
|
* :py:exc:`subprocess.CalledProcessError`: The lsb_release command had
|
|
some issue (other than not being available in the program execution
|
|
path).
|
|
|
|
* :py:exc:`UnicodeError`: A data source has unexpected characters or
|
|
uses an unexpected encoding.
|
|
"""
|
|
self.os_release_file = os_release_file or \
|
|
os.path.join(_UNIXCONFDIR, _OS_RELEASE_BASENAME)
|
|
self.distro_release_file = distro_release_file or '' # updated later
|
|
self._os_release_info = self._get_os_release_info()
|
|
self._lsb_release_info = self._get_lsb_release_info() \
|
|
if include_lsb else {}
|
|
self._distro_release_info = self._get_distro_release_info()
|
|
|
|
def __repr__(self):
|
|
"""Return repr of all info
|
|
"""
|
|
return \
|
|
"LinuxDistribution(" \
|
|
"os_release_file={0!r}, " \
|
|
"distro_release_file={1!r}, " \
|
|
"_os_release_info={2!r}, " \
|
|
"_lsb_release_info={3!r}, " \
|
|
"_distro_release_info={4!r})".format(
|
|
self.os_release_file,
|
|
self.distro_release_file,
|
|
self._os_release_info,
|
|
self._lsb_release_info,
|
|
self._distro_release_info)
|
|
|
|
def linux_distribution(self, full_distribution_name=True):
|
|
"""
|
|
Return information about the Linux distribution that is compatible
|
|
with Python's :func:`platform.linux_distribution`, supporting a subset
|
|
of its parameters.
|
|
|
|
For details, see :func:`distro.linux_distribution`.
|
|
"""
|
|
return (
|
|
self.name() if full_distribution_name else self.id(),
|
|
self.version(),
|
|
self.codename()
|
|
)
|
|
|
|
def id(self):
|
|
"""Return the distro ID of the Linux distribution, as a string.
|
|
|
|
For details, see :func:`distro.id`.
|
|
"""
|
|
def normalize(distro_id, table):
|
|
distro_id = distro_id.lower().replace(' ', '_')
|
|
return table.get(distro_id, distro_id)
|
|
|
|
distro_id = self.os_release_attr('id')
|
|
if distro_id:
|
|
return normalize(distro_id, NORMALIZED_OS_ID)
|
|
|
|
distro_id = self.lsb_release_attr('distributor_id')
|
|
if distro_id:
|
|
return normalize(distro_id, NORMALIZED_LSB_ID)
|
|
|
|
distro_id = self.distro_release_attr('id')
|
|
if distro_id:
|
|
return normalize(distro_id, NORMALIZED_DISTRO_ID)
|
|
|
|
return ''
|
|
|
|
def name(self, pretty=False):
|
|
"""
|
|
Return the name of the Linux distribution, as a string.
|
|
|
|
For details, see :func:`distro.name`.
|
|
"""
|
|
name = self.os_release_attr('name') \
|
|
or self.lsb_release_attr('distributor_id') \
|
|
or self.distro_release_attr('name')
|
|
if pretty:
|
|
name = self.os_release_attr('pretty_name') \
|
|
or self.lsb_release_attr('description')
|
|
if not name:
|
|
name = self.distro_release_attr('name')
|
|
version = self.version(pretty=True)
|
|
if version:
|
|
name = name + ' ' + version
|
|
return name or ''
|
|
|
|
def version(self, pretty=False, best=False):
|
|
"""
|
|
Return the version of the Linux distribution, as a string.
|
|
|
|
For details, see :func:`distro.version`.
|
|
"""
|
|
versions = [
|
|
self.os_release_attr('version_id'),
|
|
self.lsb_release_attr('release'),
|
|
self.distro_release_attr('version_id'),
|
|
self._parse_distro_release_content(
|
|
self.os_release_attr('pretty_name')).get('version_id', ''),
|
|
self._parse_distro_release_content(
|
|
self.lsb_release_attr('description')).get('version_id', '')
|
|
]
|
|
version = ''
|
|
if best:
|
|
# This algorithm uses the last version in priority order that has
|
|
# the best precision. If the versions are not in conflict, that
|
|
# does not matter; otherwise, using the last one instead of the
|
|
# first one might be considered a surprise.
|
|
for v in versions:
|
|
if v.count(".") > version.count(".") or version == '':
|
|
version = v
|
|
else:
|
|
for v in versions:
|
|
if v != '':
|
|
version = v
|
|
break
|
|
if pretty and version and self.codename():
|
|
version = u'{0} ({1})'.format(version, self.codename())
|
|
return version
|
|
|
|
def version_parts(self, best=False):
|
|
"""
|
|
Return the version of the Linux distribution, as a tuple of version
|
|
numbers.
|
|
|
|
For details, see :func:`distro.version_parts`.
|
|
"""
|
|
version_str = self.version(best=best)
|
|
if version_str:
|
|
version_regex = re.compile(r'(\d+)\.?(\d+)?\.?(\d+)?')
|
|
matches = version_regex.match(version_str)
|
|
if matches:
|
|
major, minor, build_number = matches.groups()
|
|
return major, minor or '', build_number or ''
|
|
return '', '', ''
|
|
|
|
def major_version(self, best=False):
|
|
"""
|
|
Return the major version number of the current distribution.
|
|
|
|
For details, see :func:`distro.major_version`.
|
|
"""
|
|
return self.version_parts(best)[0]
|
|
|
|
def minor_version(self, best=False):
|
|
"""
|
|
Return the minor version number of the Linux distribution.
|
|
|
|
For details, see :func:`distro.minor_version`.
|
|
"""
|
|
return self.version_parts(best)[1]
|
|
|
|
def build_number(self, best=False):
|
|
"""
|
|
Return the build number of the Linux distribution.
|
|
|
|
For details, see :func:`distro.build_number`.
|
|
"""
|
|
return self.version_parts(best)[2]
|
|
|
|
def like(self):
|
|
"""
|
|
Return the IDs of distributions that are like the Linux distribution.
|
|
|
|
For details, see :func:`distro.like`.
|
|
"""
|
|
return self.os_release_attr('id_like') or ''
|
|
|
|
def codename(self):
|
|
"""
|
|
Return the codename of the Linux distribution.
|
|
|
|
For details, see :func:`distro.codename`.
|
|
"""
|
|
return self.os_release_attr('codename') \
|
|
or self.lsb_release_attr('codename') \
|
|
or self.distro_release_attr('codename') \
|
|
or ''
|
|
|
|
def info(self, pretty=False, best=False):
|
|
"""
|
|
Return certain machine-readable information about the Linux
|
|
distribution.
|
|
|
|
For details, see :func:`distro.info`.
|
|
"""
|
|
return dict(
|
|
id=self.id(),
|
|
version=self.version(pretty, best),
|
|
version_parts=dict(
|
|
major=self.major_version(best),
|
|
minor=self.minor_version(best),
|
|
build_number=self.build_number(best)
|
|
),
|
|
like=self.like(),
|
|
codename=self.codename(),
|
|
)
|
|
|
|
def os_release_info(self):
|
|
"""
|
|
Return a dictionary containing key-value pairs for the information
|
|
items from the os-release file data source of the Linux distribution.
|
|
|
|
For details, see :func:`distro.os_release_info`.
|
|
"""
|
|
return self._os_release_info
|
|
|
|
def lsb_release_info(self):
|
|
"""
|
|
Return a dictionary containing key-value pairs for the information
|
|
items from the lsb_release command data source of the Linux
|
|
distribution.
|
|
|
|
For details, see :func:`distro.lsb_release_info`.
|
|
"""
|
|
return self._lsb_release_info
|
|
|
|
def distro_release_info(self):
|
|
"""
|
|
Return a dictionary containing key-value pairs for the information
|
|
items from the distro release file data source of the Linux
|
|
distribution.
|
|
|
|
For details, see :func:`distro.distro_release_info`.
|
|
"""
|
|
return self._distro_release_info
|
|
|
|
def os_release_attr(self, attribute):
|
|
"""
|
|
Return a single named information item from the os-release file data
|
|
source of the Linux distribution.
|
|
|
|
For details, see :func:`distro.os_release_attr`.
|
|
"""
|
|
return self._os_release_info.get(attribute, '')
|
|
|
|
def lsb_release_attr(self, attribute):
|
|
"""
|
|
Return a single named information item from the lsb_release command
|
|
output data source of the Linux distribution.
|
|
|
|
For details, see :func:`distro.lsb_release_attr`.
|
|
"""
|
|
return self._lsb_release_info.get(attribute, '')
|
|
|
|
def distro_release_attr(self, attribute):
|
|
"""
|
|
Return a single named information item from the distro release file
|
|
data source of the Linux distribution.
|
|
|
|
For details, see :func:`distro.distro_release_attr`.
|
|
"""
|
|
return self._distro_release_info.get(attribute, '')
|
|
|
|
def _get_os_release_info(self):
|
|
"""
|
|
Get the information items from the specified os-release file.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
if os.path.isfile(self.os_release_file):
|
|
with open(self.os_release_file) as release_file:
|
|
return self._parse_os_release_content(release_file)
|
|
return {}
|
|
|
|
@staticmethod
|
|
def _parse_os_release_content(lines):
|
|
"""
|
|
Parse the lines of an os-release file.
|
|
|
|
Parameters:
|
|
|
|
* lines: Iterable through the lines in the os-release file.
|
|
Each line must be a unicode string or a UTF-8 encoded byte
|
|
string.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
props = {}
|
|
lexer = shlex.shlex(lines, posix=True)
|
|
lexer.whitespace_split = True
|
|
|
|
# The shlex module defines its `wordchars` variable using literals,
|
|
# making it dependent on the encoding of the Python source file.
|
|
# In Python 2.6 and 2.7, the shlex source file is encoded in
|
|
# 'iso-8859-1', and the `wordchars` variable is defined as a byte
|
|
# string. This causes a UnicodeDecodeError to be raised when the
|
|
# parsed content is a unicode object. The following fix resolves that
|
|
# (... but it should be fixed in shlex...):
|
|
if sys.version_info[0] == 2 and isinstance(lexer.wordchars, bytes):
|
|
lexer.wordchars = lexer.wordchars.decode('iso-8859-1')
|
|
|
|
tokens = list(lexer)
|
|
for token in tokens:
|
|
# At this point, all shell-like parsing has been done (i.e.
|
|
# comments processed, quotes and backslash escape sequences
|
|
# processed, multi-line values assembled, trailing newlines
|
|
# stripped, etc.), so the tokens are now either:
|
|
# * variable assignments: var=value
|
|
# * commands or their arguments (not allowed in os-release)
|
|
if '=' in token:
|
|
k, v = token.split('=', 1)
|
|
if isinstance(v, bytes):
|
|
v = v.decode('utf-8')
|
|
props[k.lower()] = v
|
|
if k == 'VERSION':
|
|
# this handles cases in which the codename is in
|
|
# the `(CODENAME)` (rhel, centos, fedora) format
|
|
# or in the `, CODENAME` format (Ubuntu).
|
|
codename = re.search(r'(\(\D+\))|,(\s+)?\D+', v)
|
|
if codename:
|
|
codename = codename.group()
|
|
codename = codename.strip('()')
|
|
codename = codename.strip(',')
|
|
codename = codename.strip()
|
|
# codename appears within paranthese.
|
|
props['codename'] = codename
|
|
else:
|
|
props['codename'] = ''
|
|
else:
|
|
# Ignore any tokens that are not variable assignments
|
|
pass
|
|
return props
|
|
|
|
def _get_lsb_release_info(self):
|
|
"""
|
|
Get the information items from the lsb_release command output.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
cmd = 'lsb_release -a'
|
|
process = subprocess.Popen(
|
|
cmd,
|
|
shell=True,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
stdout, stderr = process.communicate()
|
|
stdout, stderr = stdout.decode('utf-8'), stderr.decode('utf-8')
|
|
code = process.returncode
|
|
if code == 0:
|
|
content = stdout.splitlines()
|
|
return self._parse_lsb_release_content(content)
|
|
elif code == 127: # Command not found
|
|
return {}
|
|
else:
|
|
if sys.version_info[:2] >= (3, 5):
|
|
raise subprocess.CalledProcessError(code, cmd, stdout, stderr)
|
|
elif sys.version_info[:2] >= (2, 7):
|
|
raise subprocess.CalledProcessError(code, cmd, stdout)
|
|
elif sys.version_info[:2] == (2, 6):
|
|
raise subprocess.CalledProcessError(code, cmd)
|
|
|
|
@staticmethod
|
|
def _parse_lsb_release_content(lines):
|
|
"""
|
|
Parse the output of the lsb_release command.
|
|
|
|
Parameters:
|
|
|
|
* lines: Iterable through the lines of the lsb_release output.
|
|
Each line must be a unicode string or a UTF-8 encoded byte
|
|
string.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
props = {}
|
|
for line in lines:
|
|
line = line.decode('utf-8') if isinstance(line, bytes) else line
|
|
kv = line.strip('\n').split(':', 1)
|
|
if len(kv) != 2:
|
|
# Ignore lines without colon.
|
|
continue
|
|
k, v = kv
|
|
props.update({k.replace(' ', '_').lower(): v.strip()})
|
|
return props
|
|
|
|
def _get_distro_release_info(self):
|
|
"""
|
|
Get the information items from the specified distro release file.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
if self.distro_release_file:
|
|
# If it was specified, we use it and parse what we can, even if
|
|
# its file name or content does not match the expected pattern.
|
|
distro_info = self._parse_distro_release_file(
|
|
self.distro_release_file)
|
|
basename = os.path.basename(self.distro_release_file)
|
|
# The file name pattern for user-specified distro release files
|
|
# is somewhat more tolerant (compared to when searching for the
|
|
# file), because we want to use what was specified as best as
|
|
# possible.
|
|
match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
|
|
if match:
|
|
distro_info['id'] = match.group(1)
|
|
return distro_info
|
|
else:
|
|
try:
|
|
basenames = os.listdir(_UNIXCONFDIR)
|
|
# We sort for repeatability in cases where there are multiple
|
|
# distro specific files; e.g. CentOS, Oracle, Enterprise all
|
|
# containing `redhat-release` on top of their own.
|
|
basenames.sort()
|
|
except OSError:
|
|
# This may occur when /etc is not readable but we can't be
|
|
# sure about the *-release files. Check common entries of
|
|
# /etc for information. If they turn out to not be there the
|
|
# error is handled in `_parse_distro_release_file()`.
|
|
basenames = ['SuSE-release',
|
|
'arch-release',
|
|
'base-release',
|
|
'centos-release',
|
|
'fedora-release',
|
|
'gentoo-release',
|
|
'mageia-release',
|
|
'manjaro-release',
|
|
'oracle-release',
|
|
'redhat-release',
|
|
'sl-release',
|
|
'slackware-version']
|
|
for basename in basenames:
|
|
if basename in _DISTRO_RELEASE_IGNORE_BASENAMES:
|
|
continue
|
|
match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
|
|
if match:
|
|
filepath = os.path.join(_UNIXCONFDIR, basename)
|
|
distro_info = self._parse_distro_release_file(filepath)
|
|
if 'name' in distro_info:
|
|
# The name is always present if the pattern matches
|
|
self.distro_release_file = filepath
|
|
distro_info['id'] = match.group(1)
|
|
return distro_info
|
|
return {}
|
|
|
|
def _parse_distro_release_file(self, filepath):
|
|
"""
|
|
Parse a distro release file.
|
|
|
|
Parameters:
|
|
|
|
* filepath: Path name of the distro release file.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
try:
|
|
with open(filepath) as fp:
|
|
# Only parse the first line. For instance, on SLES there
|
|
# are multiple lines. We don't want them...
|
|
return self._parse_distro_release_content(fp.readline())
|
|
except (OSError, IOError):
|
|
# Ignore not being able to read a specific, seemingly version
|
|
# related file.
|
|
# See https://github.com/nir0s/distro/issues/162
|
|
return {}
|
|
|
|
@staticmethod
|
|
def _parse_distro_release_content(line):
|
|
"""
|
|
Parse a line from a distro release file.
|
|
|
|
Parameters:
|
|
* line: Line from the distro release file. Must be a unicode string
|
|
or a UTF-8 encoded byte string.
|
|
|
|
Returns:
|
|
A dictionary containing all information items.
|
|
"""
|
|
if isinstance(line, bytes):
|
|
line = line.decode('utf-8')
|
|
matches = _DISTRO_RELEASE_CONTENT_REVERSED_PATTERN.match(
|
|
line.strip()[::-1])
|
|
distro_info = {}
|
|
if matches:
|
|
# regexp ensures non-None
|
|
distro_info['name'] = matches.group(3)[::-1]
|
|
if matches.group(2):
|
|
distro_info['version_id'] = matches.group(2)[::-1]
|
|
if matches.group(1):
|
|
distro_info['codename'] = matches.group(1)[::-1]
|
|
elif line:
|
|
distro_info['name'] = line.strip()
|
|
return distro_info
|
|
|
|
|
|
_distro = LinuxDistribution()
|
|
|
|
|
|
def main():
|
|
logger = logging.getLogger(__name__)
|
|
logger.setLevel(logging.DEBUG)
|
|
logger.addHandler(logging.StreamHandler(sys.stdout))
|
|
|
|
parser = argparse.ArgumentParser(description="Linux distro info tool")
|
|
parser.add_argument(
|
|
'--json',
|
|
'-j',
|
|
help="Output in machine readable format",
|
|
action="store_true")
|
|
args = parser.parse_args()
|
|
|
|
if args.json:
|
|
logger.info(json.dumps(info(), indent=4, sort_keys=True))
|
|
else:
|
|
logger.info('Name: %s', name(pretty=True))
|
|
distribution_version = version(pretty=True)
|
|
logger.info('Version: %s', distribution_version)
|
|
distribution_codename = codename()
|
|
logger.info('Codename: %s', distribution_codename)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|