kolla-ansible/ansible/action_plugins/merge_yaml.py
Jeffrey Zhang 1db352f007 Support check and diff mode for merge_config and merge_yaml module
Change-Id: Ib2ca736e08f48da88bb74feb5cd1efce3b860ab7
Partially-Implements: blueprint ansible-check-mode
2018-06-12 10:56:45 +08:00

112 lines
3.7 KiB
Python
Executable File

#!/usr/bin/env python
# Copyright 2015 Sam Yaple
# Copyright 2016 intel
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import inspect
import os
import shutil
import tempfile
from yaml import dump
from yaml import safe_load
try:
from yaml import CDumper as Dumper # noqa: F401
from yaml import CLoader as Loader # noqa: F401
except ImportError:
from yaml import Dumper # noqa: F401
from yaml import Loader # noqa: F401
from ansible import constants
from ansible.plugins import action
class ActionModule(action.ActionBase):
TRANSFERS_FILES = True
def read_config(self, source):
result = None
# Only use config if present
if os.access(source, os.R_OK):
with open(source, 'r') as f:
template_data = f.read()
template_data = self._templar.template(template_data)
result = safe_load(template_data)
return result or {}
def run(self, tmp=None, task_vars=None):
if task_vars is None:
task_vars = dict()
result = super(ActionModule, self).run(tmp, task_vars)
# NOTE(jeffrey4l): Ansible 2.1 add a remote_user param to the
# _make_tmp_path function. inspect the number of the args here. In
# this way, ansible 2.0 and ansible 2.1 are both supported
make_tmp_path_args = inspect.getargspec(self._make_tmp_path)[0]
if not tmp and len(make_tmp_path_args) == 1:
tmp = self._make_tmp_path()
if not tmp and len(make_tmp_path_args) == 2:
remote_user = (task_vars.get('ansible_user')
or self._play_context.remote_user)
tmp = self._make_tmp_path(remote_user)
# save template args.
extra_vars = self._task.args.get('vars', list())
old_vars = self._templar._available_variables
temp_vars = task_vars.copy()
temp_vars.update(extra_vars)
self._templar.set_available_variables(temp_vars)
output = {}
sources = self._task.args.get('sources', None)
if not isinstance(sources, list):
sources = [sources]
for source in sources:
output.update(self.read_config(source))
# restore original vars
self._templar.set_available_variables(old_vars)
local_tempdir = tempfile.mkdtemp(dir=constants.DEFAULT_LOCAL_TMP)
try:
result_file = os.path.join(local_tempdir, 'source')
with open(result_file, 'wb') as f:
f.write(dump(output, default_flow_style=False))
new_task = self._task.copy()
new_task.args.pop('sources', None)
new_task.args.update(
dict(
src=result_file
)
)
copy_action = self._shared_loader_obj.action_loader.get(
'copy',
task=new_task,
connection=self._connection,
play_context=self._play_context,
loader=self._loader,
templar=self._templar,
shared_loader_obj=self._shared_loader_obj)
result.update(copy_action.run(task_vars=task_vars))
finally:
shutil.rmtree(local_tempdir)
return result