晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。   林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。   见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝)   既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。   南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。 .
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# Copyright (C) 2014 Red Hat, Inc.,Poornima M. Kshirsagar <pkshiras@redhat.com>

# This file is part of the sos project: https://github.com/sosreport/sos
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# version 2 of the GNU General Public License.
#
# See the LICENSE file in the source distribution for further information.

import hashlib
import json
import os
from sos.report.plugins import (Plugin, RedHatPlugin, DebianPlugin,
                                UbuntuPlugin, PluginOpt)
from sos.policies.distros.redhat import RHELPolicy


class Python(Plugin):
    """Captures information on the installed python runtime(s), as well as
    python modules installed via pip.
    """

    short_desc = 'Python runtime'

    plugin_name = 'python'
    profiles = ('system',)

    packages = ('python',)

    python_version = "python -V"

    def setup(self):
        self.add_cmd_output(
            self.python_version, suggest_filename="python-version"
        )
        pips = self.exec_cmd("whereis pip -b")
        if pips['status'] == 0:
            # output is like:
            # pip: /usr/bin/pip2.7 /usr/bin/pip3.6
            # where we must skip the first word
            for pip in pips['output'].split()[1:]:
                self.add_cmd_output(f"{pip} list installed")


class UbuntuPython(Python, DebianPlugin, UbuntuPlugin):

    python_version = "python3 -V"
    packages = ('python3',)


class RedHatPython(Python, RedHatPlugin):
    """In addition to the base information, on Red Hat family distributions the
    python plugin also supports the 'hashes' option. If enabled, this plugin
    will generate a json-formatted listing of all pyfiles within the
    distribution-standard python package installation locations.
    """

    packages = ('python', 'python36', 'python2', 'python3', 'platform-python')
    option_list = [
        PluginOpt('hashes', default=False,
                  desc='collect hashes for all python files')
    ]

    def setup(self):
        self.add_cmd_output(['python2 -V', 'python3 -V'])
        if isinstance(self.policy, RHELPolicy) and \
                self.policy.dist_version() == 8:
            self.python_version = "/usr/libexec/platform-python -V"
        super().setup()

    def collect(self):
        if self.get_option('hashes'):
            with self.collection_file('digests.json') as hfile:
                hfile.write(json.dumps(self.get_hashes(), indent=4))

    def get_hashes(self):
        """ Get the hashes for Python files """
        digests = {
            'digests': []
        }
        py_paths = [
            '/usr/lib',
            '/usr/lib64',
            '/usr/local/lib',
            '/usr/local/lib64'
        ]

        for py_path in py_paths:
            for root, _, files in os.walk(self.path_join(py_path)):
                for _file in files:
                    if not _file.endswith('.py'):
                        continue
                    filepath = self.path_join(root, _file)
                    try:
                        with open(filepath, 'rb') as file:
                            digest = hashlib.sha256()
                            data = file.read(1024)
                            while data:
                                digest.update(data)
                                data = file.read(1024)

                            digest = digest.hexdigest()
                            digests['digests'].append({
                                'filepath': filepath,
                                'sha256': digest
                            })
                    except IOError:
                        self._log_error("Unable to read python file at "
                                        f"{filepath}")
        return digests

# vim: set et ts=4 sw=4 :

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