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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.

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


class Python(Plugin, DebianPlugin, UbuntuPlugin):

    short_desc = 'Python runtime'

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

    packages = ('python', 'python3')

    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("%s list installed" % pip)


class RedHatPython(Python, RedHatPlugin):

    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() > 7:
            self.python_version = "/usr/libexec/platform-python -V"
        super(RedHatPython, self).setup()

        if self.get_option('hashes'):
            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:
                        filepath = self.path_join(root, file_)
                        if filepath.endswith('.py'):
                            try:
                                with open(filepath, 'rb') as f:
                                    digest = hashlib.sha256()
                                    chunk = 1024
                                    while True:
                                        data = f.read(chunk)
                                        if data:
                                            digest.update(data)
                                        else:
                                            break

                                    digest = digest.hexdigest()

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

            self.add_string_as_file(json.dumps(digests), 'digests.json',
                                    plug_dir=True)

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