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diff --git a/third_party/python/distro/distro.py b/third_party/python/distro/distro.py new file mode 100644 index 0000000000..33061633ef --- /dev/null +++ b/third_party/python/distro/distro.py @@ -0,0 +1,1216 @@ +# Copyright 2015,2016,2017 Nir Cohen +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +""" +The ``distro`` package (``distro`` stands for Linux Distribution) provides +information about the Linux distribution it runs on, such as a reliable +machine-readable distro ID, or version information. + +It is the recommended replacement for Python's original +:py:func:`platform.linux_distribution` function, but it provides much more +functionality. An alternative implementation became necessary because Python +3.5 deprecated this function, and Python 3.8 will remove it altogether. +Its predecessor function :py:func:`platform.dist` was already +deprecated since Python 2.6 and will also be removed in Python 3.8. +Still, there are many cases in which access to OS distribution information +is needed. See `Python issue 1322 <https://bugs.python.org/issue1322>`_ for +more information. +""" + +import os +import re +import sys +import json +import shlex +import logging +import argparse +import subprocess + + +_UNIXCONFDIR = os.environ.get('UNIXCONFDIR', '/etc') +_OS_RELEASE_BASENAME = 'os-release' + +#: Translation table for normalizing the "ID" attribute defined in os-release +#: files, for use by the :func:`distro.id` method. +#: +#: * Key: Value as defined in the os-release file, translated to lower case, +#: with blanks translated to underscores. +#: +#: * Value: Normalized value. +NORMALIZED_OS_ID = { + 'ol': 'oracle', # Oracle Enterprise Linux +} + +#: Translation table for normalizing the "Distributor ID" attribute returned by +#: the lsb_release command, for use by the :func:`distro.id` method. +#: +#: * Key: Value as returned by the lsb_release command, translated to lower +#: case, with blanks translated to underscores. +#: +#: * Value: Normalized value. +NORMALIZED_LSB_ID = { + 'enterpriseenterprise': 'oracle', # Oracle Enterprise Linux + 'redhatenterpriseworkstation': 'rhel', # RHEL 6, 7 Workstation + 'redhatenterpriseserver': 'rhel', # RHEL 6, 7 Server +} + +#: Translation table for normalizing the distro ID derived from the file name +#: of distro release files, for use by the :func:`distro.id` method. +#: +#: * Key: Value as derived from the file name of a distro release file, +#: translated to lower case, with blanks translated to underscores. +#: +#: * Value: Normalized value. +NORMALIZED_DISTRO_ID = { + 'redhat': 'rhel', # RHEL 6.x, 7.x +} + +# Pattern for content of distro release file (reversed) +_DISTRO_RELEASE_CONTENT_REVERSED_PATTERN = re.compile( + r'(?:[^)]*\)(.*)\()? *(?:STL )?([\d.+\-a-z]*\d) *(?:esaeler *)?(.+)') + +# Pattern for base file name of distro release file +_DISTRO_RELEASE_BASENAME_PATTERN = re.compile( + r'(\w+)[-_](release|version)$') + +# Base file names to be ignored when searching for distro release file +_DISTRO_RELEASE_IGNORE_BASENAMES = ( + 'debian_version', + 'lsb-release', + 'oem-release', + _OS_RELEASE_BASENAME, + 'system-release' +) + + +def linux_distribution(full_distribution_name=True): + """ + Return information about the current OS distribution as a tuple + ``(id_name, version, codename)`` with items as follows: + + * ``id_name``: If *full_distribution_name* is false, the result of + :func:`distro.id`. Otherwise, the result of :func:`distro.name`. + + * ``version``: The result of :func:`distro.version`. + + * ``codename``: The result of :func:`distro.codename`. + + The interface of this function is compatible with the original + :py:func:`platform.linux_distribution` function, supporting a subset of + its parameters. + + The data it returns may not exactly be the same, because it uses more data + sources than the original function, and that may lead to different data if + the OS distribution is not consistent across multiple data sources it + provides (there are indeed such distributions ...). + + Another reason for differences is the fact that the :func:`distro.id` + method normalizes the distro ID string to a reliable machine-readable value + for a number of popular OS distributions. + """ + return _distro.linux_distribution(full_distribution_name) + + +def id(): + """ + Return the distro ID of the current distribution, as a + machine-readable string. + + For a number of OS distributions, the returned distro ID value is + *reliable*, in the sense that it is documented and that it does not change + across releases of the distribution. + + This package maintains the following reliable distro ID values: + + ============== ========================================= + Distro ID Distribution + ============== ========================================= + "ubuntu" Ubuntu + "debian" Debian + "rhel" RedHat Enterprise Linux + "centos" CentOS + "fedora" Fedora + "sles" SUSE Linux Enterprise Server + "opensuse" openSUSE + "amazon" Amazon Linux + "arch" Arch Linux + "cloudlinux" CloudLinux OS + "exherbo" Exherbo Linux + "gentoo" GenToo Linux + "ibm_powerkvm" IBM PowerKVM + "kvmibm" KVM for IBM z Systems + "linuxmint" Linux Mint + "mageia" Mageia + "mandriva" Mandriva Linux + "parallels" Parallels + "pidora" Pidora + "raspbian" Raspbian + "oracle" Oracle Linux (and Oracle Enterprise Linux) + "scientific" Scientific Linux + "slackware" Slackware + "xenserver" XenServer + "openbsd" OpenBSD + "netbsd" NetBSD + "freebsd" FreeBSD + ============== ========================================= + + If you have a need to get distros for reliable IDs added into this set, + or if you find that the :func:`distro.id` function returns a different + distro ID for one of the listed distros, please create an issue in the + `distro issue tracker`_. + + **Lookup hierarchy and transformations:** + + First, the ID is obtained from the following sources, in the specified + order. The first available and non-empty value is used: + + * the value of the "ID" attribute of the os-release file, + + * the value of the "Distributor ID" attribute returned by the lsb_release + command, + + * the first part of the file name of the distro release file, + + The so determined ID value then passes the following transformations, + before it is returned by this method: + + * it is translated to lower case, + + * blanks (which should not be there anyway) are translated to underscores, + + * a normalization of the ID is performed, based upon + `normalization tables`_. The purpose of this normalization is to ensure + that the ID is as reliable as possible, even across incompatible changes + in the OS distributions. A common reason for an incompatible change is + the addition of an os-release file, or the addition of the lsb_release + command, with ID values that differ from what was previously determined + from the distro release file name. + """ + return _distro.id() + + +def name(pretty=False): + """ + Return the name of the current OS distribution, as a human-readable + string. + + If *pretty* is false, the name is returned without version or codename. + (e.g. "CentOS Linux") + + If *pretty* is true, the version and codename are appended. + (e.g. "CentOS Linux 7.1.1503 (Core)") + + **Lookup hierarchy:** + + The name is obtained from the following sources, in the specified order. + The first available and non-empty value is used: + + * If *pretty* is false: + + - the value of the "NAME" attribute of the os-release file, + + - the value of the "Distributor ID" attribute returned by the lsb_release + command, + + - the value of the "<name>" field of the distro release file. + + * If *pretty* is true: + + - the value of the "PRETTY_NAME" attribute of the os-release file, + + - the value of the "Description" attribute returned by the lsb_release + command, + + - the value of the "<name>" field of the distro release file, appended + with the value of the pretty version ("<version_id>" and "<codename>" + fields) of the distro release file, if available. + """ + return _distro.name(pretty) + + +def version(pretty=False, best=False): + """ + Return the version of the current OS distribution, as a human-readable + string. + + If *pretty* is false, the version is returned without codename (e.g. + "7.0"). + + If *pretty* is true, the codename in parenthesis is appended, if the + codename is non-empty (e.g. "7.0 (Maipo)"). + + Some distributions provide version numbers with different precisions in + the different sources of distribution information. Examining the different + sources in a fixed priority order does not always yield the most precise + version (e.g. for Debian 8.2, or CentOS 7.1). + + The *best* parameter can be used to control the approach for the returned + version: + + If *best* is false, the first non-empty version number in priority order of + the examined sources is returned. + + If *best* is true, the most precise version number out of all examined + sources is returned. + + **Lookup hierarchy:** + + In all cases, the version number is obtained from the following sources. + If *best* is false, this order represents the priority order: + + * the value of the "VERSION_ID" attribute of the os-release file, + * the value of the "Release" attribute returned by the lsb_release + command, + * the version number parsed from the "<version_id>" field of the first line + of the distro release file, + * the version number parsed from the "PRETTY_NAME" attribute of the + os-release file, if it follows the format of the distro release files. + * the version number parsed from the "Description" attribute returned by + the lsb_release command, if it follows the format of the distro release + files. + """ + return _distro.version(pretty, best) + + +def version_parts(best=False): + """ + Return the version of the current OS distribution as a tuple + ``(major, minor, build_number)`` with items as follows: + + * ``major``: The result of :func:`distro.major_version`. + + * ``minor``: The result of :func:`distro.minor_version`. + + * ``build_number``: The result of :func:`distro.build_number`. + + For a description of the *best* parameter, see the :func:`distro.version` + method. + """ + return _distro.version_parts(best) + + +def major_version(best=False): + """ + Return the major version of the current OS distribution, as a string, + if provided. + Otherwise, the empty string is returned. The major version is the first + part of the dot-separated version string. + + For a description of the *best* parameter, see the :func:`distro.version` + method. + """ + return _distro.major_version(best) + + +def minor_version(best=False): + """ + Return the minor version of the current OS distribution, as a string, + if provided. + Otherwise, the empty string is returned. The minor version is the second + part of the dot-separated version string. + + For a description of the *best* parameter, see the :func:`distro.version` + method. + """ + return _distro.minor_version(best) + + +def build_number(best=False): + """ + Return the build number of the current OS distribution, as a string, + if provided. + Otherwise, the empty string is returned. The build number is the third part + of the dot-separated version string. + + For a description of the *best* parameter, see the :func:`distro.version` + method. + """ + return _distro.build_number(best) + + +def like(): + """ + Return a space-separated list of distro IDs of distributions that are + closely related to the current OS distribution in regards to packaging + and programming interfaces, for example distributions the current + distribution is a derivative from. + + **Lookup hierarchy:** + + This information item is only provided by the os-release file. + For details, see the description of the "ID_LIKE" attribute in the + `os-release man page + <http://www.freedesktop.org/software/systemd/man/os-release.html>`_. + """ + return _distro.like() + + +def codename(): + """ + Return the codename for the release of the current OS distribution, + as a string. + + If the distribution does not have a codename, an empty string is returned. + + Note that the returned codename is not always really a codename. For + example, openSUSE returns "x86_64". This function does not handle such + cases in any special way and just returns the string it finds, if any. + + **Lookup hierarchy:** + + * the codename within the "VERSION" attribute of the os-release file, if + provided, + + * the value of the "Codename" attribute returned by the lsb_release + command, + + * the value of the "<codename>" field of the distro release file. + """ + return _distro.codename() + + +def info(pretty=False, best=False): + """ + Return certain machine-readable information items about the current OS + distribution in a dictionary, as shown in the following example: + + .. sourcecode:: python + + { + 'id': 'rhel', + 'version': '7.0', + 'version_parts': { + 'major': '7', + 'minor': '0', + 'build_number': '' + }, + 'like': 'fedora', + 'codename': 'Maipo' + } + + The dictionary structure and keys are always the same, regardless of which + information items are available in the underlying data sources. The values + for the various keys are as follows: + + * ``id``: The result of :func:`distro.id`. + + * ``version``: The result of :func:`distro.version`. + + * ``version_parts -> major``: The result of :func:`distro.major_version`. + + * ``version_parts -> minor``: The result of :func:`distro.minor_version`. + + * ``version_parts -> build_number``: The result of + :func:`distro.build_number`. + + * ``like``: The result of :func:`distro.like`. + + * ``codename``: The result of :func:`distro.codename`. + + For a description of the *pretty* and *best* parameters, see the + :func:`distro.version` method. + """ + return _distro.info(pretty, best) + + +def os_release_info(): + """ + Return a dictionary containing key-value pairs for the information items + from the os-release file data source of the current OS distribution. + + See `os-release file`_ for details about these information items. + """ + return _distro.os_release_info() + + +def lsb_release_info(): + """ + Return a dictionary containing key-value pairs for the information items + from the lsb_release command data source of the current OS distribution. + + See `lsb_release command output`_ for details about these information + items. + """ + return _distro.lsb_release_info() + + +def distro_release_info(): + """ + Return a dictionary containing key-value pairs for the information items + from the distro release file data source of the current OS distribution. + + See `distro release file`_ for details about these information items. + """ + return _distro.distro_release_info() + + +def uname_info(): + """ + Return a dictionary containing key-value pairs for the information items + from the distro release file data source of the current OS distribution. + """ + return _distro.uname_info() + + +def os_release_attr(attribute): + """ + Return a single named information item from the os-release file data source + of the current OS distribution. + + Parameters: + + * ``attribute`` (string): Key of the information item. + + Returns: + + * (string): Value of the information item, if the item exists. + The empty string, if the item does not exist. + + See `os-release file`_ for details about these information items. + """ + return _distro.os_release_attr(attribute) + + +def lsb_release_attr(attribute): + """ + Return a single named information item from the lsb_release command output + data source of the current OS distribution. + + Parameters: + + * ``attribute`` (string): Key of the information item. + + Returns: + + * (string): Value of the information item, if the item exists. + The empty string, if the item does not exist. + + See `lsb_release command output`_ for details about these information + items. + """ + return _distro.lsb_release_attr(attribute) + + +def distro_release_attr(attribute): + """ + Return a single named information item from the distro release file + data source of the current OS distribution. + + Parameters: + + * ``attribute`` (string): Key of the information item. + + Returns: + + * (string): Value of the information item, if the item exists. + The empty string, if the item does not exist. + + See `distro release file`_ for details about these information items. + """ + return _distro.distro_release_attr(attribute) + + +def uname_attr(attribute): + """ + Return a single named information item from the distro release file + data source of the current OS distribution. + + Parameters: + + * ``attribute`` (string): Key of the information item. + + Returns: + + * (string): Value of the information item, if the item exists. + The empty string, if the item does not exist. + """ + return _distro.uname_attr(attribute) + + +class cached_property(object): + """A version of @property which caches the value. On access, it calls the + underlying function and sets the value in `__dict__` so future accesses + will not re-call the property. + """ + def __init__(self, f): + self._fname = f.__name__ + self._f = f + + def __get__(self, obj, owner): + assert obj is not None, 'call {} on an instance'.format(self._fname) + ret = obj.__dict__[self._fname] = self._f(obj) + return ret + + +class LinuxDistribution(object): + """ + Provides information about a OS distribution. + + This package creates a private module-global instance of this class with + default initialization arguments, that is used by the + `consolidated accessor functions`_ and `single source accessor functions`_. + By using default initialization arguments, that module-global instance + returns data about the current OS distribution (i.e. the distro this + package runs on). + + Normally, it is not necessary to create additional instances of this class. + However, in situations where control is needed over the exact data sources + that are used, instances of this class can be created with a specific + distro release file, or a specific os-release file, or without invoking the + lsb_release command. + """ + + def __init__(self, + include_lsb=True, + os_release_file='', + distro_release_file='', + include_uname=True): + """ + The initialization method of this class gathers information from the + available data sources, and stores that in private instance attributes. + Subsequent access to the information items uses these private instance + attributes, so that the data sources are read only once. + + Parameters: + + * ``include_lsb`` (bool): Controls whether the + `lsb_release command output`_ is included as a data source. + + 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. + + * ``include_name`` (bool): Controls whether uname command output is + included as a data source. If the uname command is not available in + the program execution path the data source for the uname command 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. + + * ``include_lsb`` (bool): The result of the ``include_lsb`` parameter. + This controls whether the lsb information will be loaded. + + * ``include_uname`` (bool): The result of the ``include_uname`` + parameter. This controls whether the uname information will + be loaded. + + 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.include_lsb = include_lsb + self.include_uname = include_uname + + def __repr__(self): + """Return repr of all info + """ + return \ + "LinuxDistribution(" \ + "os_release_file={self.os_release_file!r}, " \ + "distro_release_file={self.distro_release_file!r}, " \ + "include_lsb={self.include_lsb!r}, " \ + "include_uname={self.include_uname!r}, " \ + "_os_release_info={self._os_release_info!r}, " \ + "_lsb_release_info={self._lsb_release_info!r}, " \ + "_distro_release_info={self._distro_release_info!r}, " \ + "_uname_info={self._uname_info!r})".format( + self=self) + + def linux_distribution(self, full_distribution_name=True): + """ + Return information about the OS 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 OS 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) + + distro_id = self.uname_attr('id') + if distro_id: + return normalize(distro_id, NORMALIZED_DISTRO_ID) + + return '' + + def name(self, pretty=False): + """ + Return the name of the OS 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') \ + or self.uname_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') \ + or self.uname_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 OS 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', ''), + self.uname_attr('release') + ] + 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 OS 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 current 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 current 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 OS distribution. + + For details, see :func:`distro.like`. + """ + return self.os_release_attr('id_like') or '' + + def codename(self): + """ + Return the codename of the OS distribution. + + For details, see :func:`distro.codename`. + """ + try: + # Handle os_release specially since distros might purposefully set + # this to empty string to have no codename + return self._os_release_info['codename'] + except KeyError: + return 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 OS + 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 OS 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 OS + 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 OS + distribution. + + For details, see :func:`distro.distro_release_info`. + """ + return self._distro_release_info + + def uname_info(self): + """ + Return a dictionary containing key-value pairs for the information + items from the uname command data source of the OS distribution. + + For details, see :func:`distro.uname_info`. + """ + return self._uname_info + + def os_release_attr(self, attribute): + """ + Return a single named information item from the os-release file data + source of the OS 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 OS 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 OS distribution. + + For details, see :func:`distro.distro_release_attr`. + """ + return self._distro_release_info.get(attribute, '') + + def uname_attr(self, attribute): + """ + Return a single named information item from the uname command + output data source of the OS distribution. + + For details, see :func:`distro.uname_release_attr`. + """ + return self._uname_info.get(attribute, '') + + @cached_property + def _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 + else: + # Ignore any tokens that are not variable assignments + pass + + if 'version_codename' in props: + # os-release added a version_codename field. Use that in + # preference to anything else Note that some distros purposefully + # do not have code names. They should be setting + # version_codename="" + props['codename'] = props['version_codename'] + elif 'ubuntu_codename' in props: + # Same as above but a non-standard field name used on older Ubuntus + props['codename'] = props['ubuntu_codename'] + elif 'version' in props: + # If there is no version_codename, parse it from the version + codename = re.search(r'(\(\D+\))|,(\s+)?\D+', props['version']) + if codename: + codename = codename.group() + codename = codename.strip('()') + codename = codename.strip(',') + codename = codename.strip() + # codename appears within paranthese. + props['codename'] = codename + + return props + + @cached_property + def _lsb_release_info(self): + """ + Get the information items from the lsb_release command output. + + Returns: + A dictionary containing all information items. + """ + if not self.include_lsb: + return {} + with open(os.devnull, 'w') as devnull: + try: + cmd = ('lsb_release', '-a') + stdout = subprocess.check_output(cmd, stderr=devnull) + except OSError: # Command not found + return {} + content = stdout.decode(sys.getfilesystemencoding()).splitlines() + return self._parse_lsb_release_content(content) + + @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: + 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 + + @cached_property + def _uname_info(self): + with open(os.devnull, 'w') as devnull: + try: + cmd = ('uname', '-rs') + stdout = subprocess.check_output(cmd, stderr=devnull) + except OSError: + return {} + content = stdout.decode(sys.getfilesystemencoding()).splitlines() + return self._parse_uname_content(content) + + @staticmethod + def _parse_uname_content(lines): + props = {} + match = re.search(r'^([^\s]+)\s+([\d\.]+)', lines[0].strip()) + if match: + name, version = match.groups() + + # This is to prevent the Linux kernel version from + # appearing as the 'best' version on otherwise + # identifiable distributions. + if name == 'Linux': + return {} + props['id'] = name.lower() + props['name'] = name + props['release'] = version + return props + + @cached_property + def _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 'name' in distro_info \ + and 'cloudlinux' in distro_info['name'].lower(): + distro_info['id'] = 'cloudlinux' + elif 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', + 'mandrake-release', + 'mandriva-release', + 'mandrivalinux-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) + if 'cloudlinux' in distro_info['name'].lower(): + distro_info['id'] = 'cloudlinux' + 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="OS 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() |