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ansible/library/copy

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# 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 os
import shutil
import time
def main():
module = AnsibleModule(
# not checking because of daisy chain to file module
check_invalid_arguments = False,
argument_spec = dict(
src=dict(required=True),
dest=dict(required=True),
backup=dict(default=False, choices=BOOLEANS),
)
)
src = os.path.expanduser(module.params['src'])
dest = os.path.expanduser(module.params['dest'])
backup = module.boolean(module.params.get('backup', False))
if not os.path.exists(src):
module.fail_json(msg="Source %s failed to transfer" % (src))
if not os.access(src, os.R_OK):
module.fail_json(msg="Source %s not readable" % (src))
md5sum_src = module.md5(src)
md5sum_dest = None
if os.path.exists(dest):
if not os.access(dest, os.W_OK):
module.fail_json(msg="Destination %s not writable" % (dest))
if not os.access(dest, os.R_OK):
module.fail_json(msg="Destination %s not readable" % (dest))
# Allow dest to be directory without compromising md5 check
if (os.path.isdir(dest)):
module.fail_json(msg="Destination %s cannot be a directory" % (dest))
md5sum_dest = module.md5(dest)
else:
if not os.path.exists(os.path.dirname(dest)):
module.fail_json(msg="Destination directory %s does not exist" % (os.path.dirname(dest)))
if not os.access(os.path.dirname(dest), os.W_OK):
module.fail_json(msg="Destination %s not writable" % (os.path.dirname(dest)))
backup_file = None
if md5sum_src != md5sum_dest:
try:
if backup:
if os.path.exists(dest):
backup_file = module.backup_local(dest)
#TODO:pid + epoch should avoid most collisions, hostname/mac for those using nfs?
# might be an issue with exceeding path length
dest_tmp = "%s.%s.%s.tmp" % (dest,os.getpid(),time.time())
shutil.copyfile(src, dest_tmp)
shutil.move(dest_tmp, dest)
except shutil.Error:
module.fail_json(msg="failed to copy: %s and %s are the same" % (src, dest))
except IOError:
module.fail_json(msg="failed to copy: %s to %s" % (src, dest))
changed = True
else:
changed = False
res_args = {
'dest':dest,
'src':src,
'md5sum':md5sum_src,
'changed':changed
}
if backup_file:
res_args['backup_file'] = backup_file
module.exit_json(**res_args)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()