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# (c) 2018, Ansible Project
#
# 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/>.
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.plugins.action import ActionBase
try:
from __main__ import display
except ImportError:
from ansible.utils.display import Display
display = Display()
class ActionModule(ActionBase):
TRANSFERS_FILES = False
def run(self, tmp=None, task_vars=None):
'''
Action plugin handler for yum3 vs yum4(dnf) operations.
Enables the yum module to use yum3 and/or yum4. Yum4 is a yum
command-line compatibility layer on top of dnf. Since the Ansible
modules for yum(aka yum3) and dnf(aka yum4) call each of yum3 and yum4's
python APIs natively on the backend, we need to handle this here and
pass off to the correct Ansible module to execute on the remote system.
'''
self._supports_check_mode = True
self._supports_async = True
result = super(ActionModule, self).run(tmp, task_vars)
del tmp # tmp no longer has any effect
# Carry-over concept from the package action plugin
module = self._task.args.get('use_backend', "auto")
if module == 'auto':
try:
if self._task.delegate_to: # if we delegate, we should use delegated host's facts
module = self._templar.template("{{hostvars['%s']['ansible_facts']['pkg_mgr']}}" % self._task.delegate_to)
else:
module = self._templar.template("{{ansible_facts.pkg_mgr}}")
except Exception:
pass # could not get it from template!
if module not in ["yum", "yum4", "dnf"]:
facts = self._execute_module(module_name="setup", module_args=dict(filter="ansible_pkg_mgr", gather_subset="!all"), task_vars=task_vars)
display.debug("Facts %s" % facts)
module = facts.get("ansible_facts", {}).get("ansible_pkg_mgr", "auto")
if (not self._task.delegate_to or self._task.delegate_facts) and module != 'auto':
result['ansible_facts'] = {'pkg_mgr': module}
if module != "auto":
if module == "yum4":
module = "dnf"
if module not in self._shared_loader_obj.module_loader:
result.update({'failed': True, 'msg': "Could not find a yum module backend for %s." % module})
else:
# run either the yum (yum3) or dnf (yum4) backend module
new_module_args = self._task.args.copy()
if 'use_backend' in new_module_args:
del new_module_args['use_backend']
display.vvvv("Running %s as the backend for the yum action plugin" % module)
result.update(self._execute_module(module_name=module, module_args=new_module_args, task_vars=task_vars, wrap_async=self._task.async_val))
# Now fall through to cleanup
else:
result.update(
{
'failed': True,
'msg': ("Could not detect which major revision of yum is in use, which is required to determine module backend.",
"You can manually specify use_backend to tell the module whether to use the yum (yum3) or dnf (yum4) backend})"),
}
)
# Now fall through to cleanup
# Cleanup
if not self._task.async_val:
# remove a temporary path we created
self._remove_tmp_path(self._connection._shell.tmpdir)
return result
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