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Directory :  /proc/2/task/2/cwd/usr/lib/python3/dist-packages/ansible/plugins/inventory/

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Current File : /proc/2/task/2/cwd/usr/lib/python3/dist-packages/ansible/plugins/inventory/script.py
# Copyright (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
# Copyright (c) 2017 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

DOCUMENTATION = '''
    name: script
    version_added: "2.4"
    short_description: Executes an inventory script that returns JSON
    options:
      always_show_stderr:
        description: Toggle display of stderr even when script was successful
        version_added: "2.5.1"
        default: True
        type: boolean
        ini:
           - section: inventory_plugin_script
             key: always_show_stderr
        env:
           - name: ANSIBLE_INVENTORY_PLUGIN_SCRIPT_STDERR
    description:
        - The source provided must be an executable that returns Ansible inventory JSON
        - The source must accept C(--list) and C(--host <hostname>) as arguments.
          C(--host) will only be used if no C(_meta) key is present.
          This is a performance optimization as the script would be called per host otherwise.
    notes:
        - Enabled in configuration by default.
        - The plugin does not cache results because external inventory scripts are responsible for their own caching.
'''

import os
import subprocess

from collections.abc import Mapping

from ansible.errors import AnsibleError, AnsibleParserError
from ansible.module_utils.basic import json_dict_bytes_to_unicode
from ansible.module_utils._text import to_native, to_text
from ansible.plugins.inventory import BaseInventoryPlugin
from ansible.utils.display import Display

display = Display()


class InventoryModule(BaseInventoryPlugin):
    ''' Host inventory parser for ansible using external inventory scripts. '''

    NAME = 'script'

    def __init__(self):

        super(InventoryModule, self).__init__()

        self._hosts = set()

    def verify_file(self, path):
        ''' Verify if file is usable by this plugin, base does minimal accessibility check '''

        valid = super(InventoryModule, self).verify_file(path)

        if valid:
            # not only accessible, file must be executable and/or have shebang
            shebang_present = False
            try:
                with open(path, 'rb') as inv_file:
                    initial_chars = inv_file.read(2)
                    if initial_chars.startswith(b'#!'):
                        shebang_present = True
            except Exception:
                pass

            if not os.access(path, os.X_OK) and not shebang_present:
                valid = False

        return valid

    def parse(self, inventory, loader, path, cache=None):

        super(InventoryModule, self).parse(inventory, loader, path)
        self.set_options()

        # Support inventory scripts that are not prefixed with some
        # path information but happen to be in the current working
        # directory when '.' is not in PATH.
        cmd = [path, "--list"]

        try:
            try:
                sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
            except OSError as e:
                raise AnsibleParserError("problem running %s (%s)" % (' '.join(cmd), to_native(e)))
            (stdout, stderr) = sp.communicate()

            path = to_native(path)
            err = to_native(stderr or "")

            if err and not err.endswith('\n'):
                err += '\n'

            if sp.returncode != 0:
                raise AnsibleError("Inventory script (%s) had an execution error: %s " % (path, err))

            # make sure script output is unicode so that json loader will output unicode strings itself
            try:
                data = to_text(stdout, errors="strict")
            except Exception as e:
                raise AnsibleError("Inventory {0} contained characters that cannot be interpreted as UTF-8: {1}".format(path, to_native(e)))

            try:
                processed = self.loader.load(data, json_only=True)
            except Exception as e:
                raise AnsibleError("failed to parse executable inventory script results from {0}: {1}\n{2}".format(path, to_native(e), err))

            # if no other errors happened and you want to force displaying stderr, do so now
            if stderr and self.get_option('always_show_stderr'):
                self.display.error(msg=to_text(err))

            if not isinstance(processed, Mapping):
                raise AnsibleError("failed to parse executable inventory script results from {0}: needs to be a json dict\n{1}".format(path, err))

            group = None
            data_from_meta = None

            # A "_meta" subelement may contain a variable "hostvars" which contains a hash for each host
            # if this "hostvars" exists at all then do not call --host for each # host.
            # This is for efficiency and scripts should still return data
            # if called with --host for backwards compat with 1.2 and earlier.
            for (group, gdata) in processed.items():
                if group == '_meta':
                    if 'hostvars' in gdata:
                        data_from_meta = gdata['hostvars']
                else:
                    self._parse_group(group, gdata)

            for host in self._hosts:
                got = {}
                if data_from_meta is None:
                    got = self.get_host_variables(path, host)
                else:
                    try:
                        got = data_from_meta.get(host, {})
                    except AttributeError as e:
                        raise AnsibleError("Improperly formatted host information for %s: %s" % (host, to_native(e)), orig_exc=e)

                self._populate_host_vars([host], got)

        except Exception as e:
            raise AnsibleParserError(to_native(e))

    def _parse_group(self, group, data):

        group = self.inventory.add_group(group)

        if not isinstance(data, dict):
            data = {'hosts': data}
        # is not those subkeys, then simplified syntax, host with vars
        elif not any(k in data for k in ('hosts', 'vars', 'children')):
            data = {'hosts': [group], 'vars': data}

        if 'hosts' in data:
            if not isinstance(data['hosts'], list):
                raise AnsibleError("You defined a group '%s' with bad data for the host list:\n %s" % (group, data))

            for hostname in data['hosts']:
                self._hosts.add(hostname)
                self.inventory.add_host(hostname, group)

        if 'vars' in data:
            if not isinstance(data['vars'], dict):
                raise AnsibleError("You defined a group '%s' with bad data for variables:\n %s" % (group, data))

            for k, v in data['vars'].items():
                self.inventory.set_variable(group, k, v)

        if group != '_meta' and isinstance(data, dict) and 'children' in data:
            for child_name in data['children']:
                child_name = self.inventory.add_group(child_name)
                self.inventory.add_child(group, child_name)

    def get_host_variables(self, path, host):
        """ Runs <script> --host <hostname>, to determine additional host variables """

        cmd = [path, "--host", host]
        try:
            sp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        except OSError as e:
            raise AnsibleError("problem running %s (%s)" % (' '.join(cmd), e))
        (out, err) = sp.communicate()
        if out.strip() == '':
            return {}
        try:
            return json_dict_bytes_to_unicode(self.loader.load(out, file_name=path))
        except ValueError:
            raise AnsibleError("could not parse post variable response: %s, %s" % (cmd, out))

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