# this is a virtual module that is entirely implemented server side
# 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


ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['stableinterface'],
                    'supported_by': 'core'}


DOCUMENTATION = '''
---
module: fetch
short_description: Fetches a file from remote nodes
description:
     - This module works like M(copy), but in reverse. It is used for fetching
       files from remote machines and storing them locally in a file tree,
       organized by hostname.
     - This module is also supported for Windows targets.
version_added: "0.2"
options:
  src:
    description:
      - The file on the remote system to fetch. This I(must) be a file, not a
        directory. Recursive fetching may be supported in a later release.
    required: true
    default: null
    aliases: []
  dest:
    description:
      - A directory to save the file into. For example, if the I(dest)
        directory is C(/backup) a I(src) file named C(/etc/profile) on host
        C(host.example.com), would be saved into
        C(/backup/host.example.com/etc/profile)
    required: true
    default: null
  fail_on_missing:
    version_added: "1.1"
    description:
      - When set to 'yes', the task will fail if the remote file cannot be
        read for any reason.  Prior to Ansible-2.4, setting this would only fail
        if the source file was missing.
      - The default was changed to "yes" in Ansible-2.4.
    required: false
    choices: [ "yes", "no" ]
    default: "yes"
  validate_checksum:
    version_added: "1.4"
    description:
      - Verify that the source and destination checksums match after the files are fetched.
    required: false
    choices: [ "yes", "no" ]
    default: "yes"
    aliases: [ "validate_md5" ]
  flat:
    version_added: "1.2"
    description:
      - Allows you to override the default behavior of appending
        hostname/path/to/file to the destination.  If dest ends with '/', it
        will use the basename of the source file, similar to the copy module.
        Obviously this is only handy if the filenames are unique.
requirements: []
author:
    - "Ansible Core Team"
    - "Michael DeHaan"
notes:
    - When running fetch with C(become), the M(slurp) module will also be
      used to fetch the contents of the file for determining the remote
      checksum. This effectively doubles the transfer size, and
      depending on the file size can consume all available memory on the
      remote or local hosts causing a C(MemoryError). Due to this it is
      advisable to run this module without C(become) whenever possible.
    - Prior to Ansible-2.4 this module would not fail if reading the remote
      file was impossible unless fail_on_missing was set.  In Ansible-2.4+,
      playbook authors are encouraged to use fail_when or ignore_errors to
      get this ability.  They may also explicitly set fail_on_missing to False
      to get the non-failing behaviour.
    - This module is also supported for Windows targets.
'''

EXAMPLES = '''
# Store file into /tmp/fetched/host.example.com/tmp/somefile
- fetch:
    src: /tmp/somefile
    dest: /tmp/fetched

# Specifying a path directly
- fetch:
    src: /tmp/somefile
    dest: /tmp/prefix-{{ inventory_hostname }}
    flat: yes

# Specifying a destination path
- fetch:
    src: /tmp/uniquefile
    dest: /tmp/special/
    flat: yes

# Storing in a path relative to the playbook
- fetch:
    src: /tmp/uniquefile
    dest: special/prefix-{{ inventory_hostname }}
    flat: yes
'''
