#!/usr/bin/python
# -*- coding: utf-8 -*-

# (c) 2012-2013, Timothy Appnel <tim@appnel.com>
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

import subprocess

DOCUMENTATION = '''
---
module: synchronize
version_added: "1.4"
short_description: Uses rsync to make synchronizing file paths in your playbooks quick and easy.
description:
    - This is a wrapper around rsync. Of course you could just use the command action to call rsync yourself, but you also have to add a fair number of boilerplate options and host facts. You still may need to call rsync directly via C(command) or C(shell) depending on your use case. The synchronize action is meant to do common things with C(rsync) easily. It does not provide access to the full power of rsync, but does make most invocations easier to follow.
options:
  src:
    description:
      - Path on the source machine that will be synchronized to the destination; The path can be absolute or relative.
    required: true
  dest:
    description:
      - Path on the destination machine that will be synchronized from the source; The path can be absolute or relative.
    required: true
  mode:
    description:
      - Specify the direction of the synchroniztion. In push mode the localhost or delgate is the  source; In pull mode the remote host in context is the source.
    required: false
    choices: [ 'push', 'pull' ]
    default: 'push'
  verbosity:
    description:
      - An integer controlling the amount of information returned during processing. See the C(-v, --verbose) option of the rsync man page for details. If verbosity is not defined or a value of 0 is assumed, the C(--quiet) option is passed and information is supressed.
    required: false
    default: 0
  delete:
    description:
      - Delete files that don't exist (after transfer, not before) in the C(src) path.
    choices: [ 'yes', 'no' ]
    default: 'no'
    required: false
  rsync_path:
    description:
      - Specify the rsync command to run on the remote machine. See C(--rsync-path) on the rsync man page.
    required: false
author: Timothy Appnel
'''

EXAMPLES = '''
# Synchronization of src on the control machien to dest on the remote hosts
synchronize: src=some/relative/path dest=/some/absolute/path

# Synchronization of two paths both on the control machine
local_action: synchronize src=some/relative/path dest=/some/absolute/path

# Synchronization of src on the inventory host to the dest on the localhost in
pull mode
synchronize: mode=pull src=some/relative/path dest=/some/absolute/path

# Synchronization of src on delegate host to dest on the current inventory host
synchronize: >
    src=some/relative/path dest=/some/absolute/path
    delegate_to: delegate.host

# Synchronize and delete files in dest on the remote host that are not found in src of localhost.
synchronize: src=some/relative/path dest=/some/absolute/path delete=yes

# Synchronize and return verbose information from the rsync transfer.
synchronize: src=some/relative/path dest=/some/absolute/path verbosity=1

# Synchronize using an alternate rsync command
synchronize: src=some/relative/path dest=/some/absolute/path rsync_path="sudo rsync"
'''


def main():
    module = AnsibleModule(
        argument_spec = dict(
            src = dict(required=True),
            dest = dict(required=True),
            verbosity = dict(default=0),
            delete = dict(default='no', type='bool'),
            private_key = dict(default=None),
            rsync_path = dict(default=None),
        ),
        supports_check_mode = True
    )

    source = module.params['src']
    dest = module.params['dest']
    verbosity = module.params['verbosity']
    delete = module.params['delete']
    private_key = module.params['private_key']
    rsync_path = module.params['rsync_path']
    rsync = module.params.get('local_rsync_path', 'rsync')

    cmd = '%s --archive --delay-updates --compress' % rsync
    if module.check_mode:
        cmd = cmd + ' --dry-run'
    if verbosity:
        cmd = '%s -%s' % (cmd, 'v' * int(verbosity))
    else:
        cmd = cmd + ' --quiet'
    if delete:
        cmd = cmd + ' --delete-after'
    if private_key is None:
        private_key = ''
    else:
        private_key = '-i '+ private_key 
    cmd = cmd + " --rsh '%s %s -o %s'" % ('ssh', private_key,
                'StrictHostKeyChecking=no')  # need ssh param
    if rsync_path:
        cmd = cmd + ' --rsync-path ' + rsync_path

    cmd = ' '.join([cmd, source, dest])
    cmdstr = cmd
    cmd = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE,
                           stderr=subprocess.PIPE)
    (out, err) = cmd.communicate()
    if cmd.returncode:
        return module.fail_json(msg=err, rc=cmd.returncode, cmd=cmdstr)
    else:
        return module.exit_json(changed=True, msg=out,
                                rc=cmd.returncode, cmd=cmdstr, check=module.check_mode)


# include magic from lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>

main()