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# (c) 2012, Daniel Hokka Zakrisson <daniel@hozac.com>
# (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 = """
    lookup: lines
    author: Daniel Hokka Zakrisson <daniel@hozac.com>
    version_added: "0.9"
    short_description: read lines from command
    description:
      - Run one or more commands and split the output into lines, returning them as a list
    options:
      _terms:
        description: command(s) to run
        required: True
    notes:
      - Like all lookups, this runs on the Ansible controller and is unaffected by other keywords such as 'become'.
        If you need to use different permissions, you must change the command or run Ansible as another user.
      - Alternatively, you can use a shell/command task that runs against localhost and registers the result.
"""

EXAMPLES = """
- name: We could read the file directly, but this shows output from command
  debug: msg="{{ item }} is an output line from running cat on /etc/motd"
  with_lines: cat /etc/motd

- name: More useful example of looping over a command result
  shell: "/usr/bin/frobnicate {{ item }}"
  with_lines:
    - "/usr/bin/frobnications_per_host --param {{ inventory_hostname }}"
"""

RETURN = """
  _list:
    description:
      - lines of stdout from command
"""

import subprocess
from ansible.errors import AnsibleError
from ansible.plugins.lookup import LookupBase
from ansible.module_utils._text import to_text


class LookupModule(LookupBase):

    def run(self, terms, variables, **kwargs):

        ret = []
        for term in terms:
            p = subprocess.Popen(term, cwd=self._loader.get_basedir(), shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
            (stdout, stderr) = p.communicate()
            if p.returncode == 0:
                ret.extend([to_text(l) for l in stdout.splitlines()])
            else:
                raise AnsibleError("lookup_plugin.lines(%s) returned %d" % (term, p.returncode))
        return ret