mirror of
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620 lines
27 KiB
Python
620 lines
27 KiB
Python
# (c) 2012-2013, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#############################################
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from ansible.utils.template import template
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from ansible import utils
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from ansible import errors
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from ansible.playbook.task import Task
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import pipes
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import shlex
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import os
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class Play(object):
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__slots__ = [
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'hosts', 'name', 'vars', 'default_vars', 'vars_prompt', 'vars_files',
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'handlers', 'remote_user', 'remote_port', 'included_roles', 'accelerate',
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'accelerate_port', 'sudo', 'sudo_user', 'transport', 'playbook',
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'tags', 'gather_facts', 'serial', '_ds', '_handlers', '_tasks',
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'basedir', 'any_errors_fatal', 'roles', 'max_fail_pct'
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]
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# to catch typos and so forth -- these are userland names
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# and don't line up 1:1 with how they are stored
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VALID_KEYS = [
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'hosts', 'name', 'vars', 'vars_prompt', 'vars_files',
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'tasks', 'handlers', 'user', 'port', 'include', 'accelerate', 'accelerate_port',
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'sudo', 'sudo_user', 'connection', 'tags', 'gather_facts', 'serial',
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'any_errors_fatal', 'roles', 'pre_tasks', 'post_tasks', 'max_fail_percentage'
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]
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# *************************************************
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def __init__(self, playbook, ds, basedir):
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''' constructor loads from a play datastructure '''
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for x in ds.keys():
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if not x in Play.VALID_KEYS:
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raise errors.AnsibleError("%s is not a legal parameter in an Ansible Playbook" % x)
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# allow all playbook keys to be set by --extra-vars
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self.vars = ds.get('vars', {})
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self.vars_prompt = ds.get('vars_prompt', {})
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self.playbook = playbook
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self.vars = self._get_vars()
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self.basedir = basedir
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self.roles = ds.get('roles', None)
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self.tags = ds.get('tags', None)
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if self.tags is None:
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self.tags = []
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elif type(self.tags) in [ str, unicode ]:
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self.tags = self.tags.split(",")
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elif type(self.tags) != list:
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self.tags = []
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# We first load the vars files from the datastructure
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# so we have the default variables to pass into the roles
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self.vars_files = ds.get('vars_files', [])
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self._update_vars_files_for_host(None)
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# now we load the roles into the datastructure
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self.included_roles = []
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ds = self._load_roles(self.roles, ds)
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# and finally re-process the vars files as they may have
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# been updated by the included roles
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self.vars_files = ds.get('vars_files', [])
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self._update_vars_files_for_host(None)
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# template everything to be efficient, but do not pre-mature template
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# tasks/handlers as they may have inventory scope overrides
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_tasks = ds.pop('tasks', [])
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_handlers = ds.pop('handlers', [])
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ds = template(basedir, ds, self.vars)
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ds['tasks'] = _tasks
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ds['handlers'] = _handlers
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self._ds = ds
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hosts = ds.get('hosts')
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if hosts is None:
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raise errors.AnsibleError('hosts declaration is required')
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elif isinstance(hosts, list):
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hosts = ';'.join(hosts)
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self.serial = int(ds.get('serial', 0))
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self.hosts = hosts
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self.name = ds.get('name', self.hosts)
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self._tasks = ds.get('tasks', [])
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self._handlers = ds.get('handlers', [])
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self.remote_user = ds.get('user', self.playbook.remote_user)
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self.remote_port = ds.get('port', self.playbook.remote_port)
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self.sudo = ds.get('sudo', self.playbook.sudo)
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self.sudo_user = ds.get('sudo_user', self.playbook.sudo_user)
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self.transport = ds.get('connection', self.playbook.transport)
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self.gather_facts = ds.get('gather_facts', None)
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self.remote_port = self.remote_port
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self.any_errors_fatal = utils.boolean(ds.get('any_errors_fatal', 'false'))
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self.accelerate = utils.boolean(ds.get('accelerate', 'false'))
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self.accelerate_port = ds.get('accelerate_port', None)
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self.max_fail_pct = int(ds.get('max_fail_percentage', 100))
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load_vars = {}
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if self.playbook.inventory.basedir() is not None:
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load_vars['inventory_dir'] = self.playbook.inventory.basedir()
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self._tasks = self._load_tasks(self._ds.get('tasks', []), load_vars)
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self._handlers = self._load_tasks(self._ds.get('handlers', []), load_vars)
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if self.sudo_user != 'root':
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self.sudo = True
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# *************************************************
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def _get_role_path(self, role):
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"""
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Returns the path on disk to the directory containing
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the role directories like tasks, templates, etc. Also
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returns any variables that were included with the role
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"""
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orig_path = template(self.basedir,role,self.vars)
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role_vars = {}
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if type(orig_path) == dict:
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# what, not a path?
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role_name = orig_path.get('role', None)
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if role_name is None:
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raise errors.AnsibleError("expected a role name in dictionary: %s" % orig_path)
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role_vars = orig_path
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orig_path = role_name
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path = utils.path_dwim(self.basedir, os.path.join('roles', orig_path))
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if not os.path.isdir(path) and not orig_path.startswith(".") and not orig_path.startswith("/"):
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path2 = utils.path_dwim(self.basedir, orig_path)
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if not os.path.isdir(path2):
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raise errors.AnsibleError("cannot find role in %s or %s" % (path, path2))
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path = path2
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elif not os.path.isdir(path):
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raise errors.AnsibleError("cannot find role in %s" % (path))
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return (path, role_vars)
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def _build_role_dependencies(self, roles, dep_stack, passed_vars={}, level=0):
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# this number is arbitrary, but it seems sane
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if level > 20:
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raise errors.AnsibleError("too many levels of recursion while resolving role dependencies")
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for role in roles:
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role_path,role_vars = self._get_role_path(role)
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role_vars = utils.combine_vars(role_vars, passed_vars)
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vars = self._resolve_main(utils.path_dwim(self.basedir, os.path.join(role_path, 'vars')))
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vars_data = {}
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if os.path.isfile(vars):
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vars_data = utils.parse_yaml_from_file(vars)
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if vars_data:
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role_vars = utils.combine_vars(vars_data, role_vars)
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defaults = self._resolve_main(utils.path_dwim(self.basedir, os.path.join(role_path, 'defaults')))
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defaults_data = {}
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if os.path.isfile(defaults):
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defaults_data = utils.parse_yaml_from_file(defaults)
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# the meta directory contains the yaml that should
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# hold the list of dependencies (if any)
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meta = self._resolve_main(utils.path_dwim(self.basedir, os.path.join(role_path, 'meta')))
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if os.path.isfile(meta):
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data = utils.parse_yaml_from_file(meta)
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if data:
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dependencies = data.get('dependencies',[])
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for dep in dependencies:
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allow_dupes = False
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(dep_path,dep_vars) = self._get_role_path(dep)
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meta = self._resolve_main(utils.path_dwim(self.basedir, os.path.join(dep_path, 'meta')))
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if os.path.isfile(meta):
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meta_data = utils.parse_yaml_from_file(meta)
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if meta_data:
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allow_dupes = utils.boolean(meta_data.get('allow_duplicates',''))
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if not allow_dupes:
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if dep in self.included_roles:
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continue
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else:
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self.included_roles.append(dep)
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dep_vars = utils.combine_vars(passed_vars, dep_vars)
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dep_vars = utils.combine_vars(role_vars, dep_vars)
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vars = self._resolve_main(utils.path_dwim(self.basedir, os.path.join(dep_path, 'vars')))
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vars_data = {}
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if os.path.isfile(vars):
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vars_data = utils.parse_yaml_from_file(vars)
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if vars_data:
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dep_vars = utils.combine_vars(vars_data, dep_vars)
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defaults = self._resolve_main(utils.path_dwim(self.basedir, os.path.join(dep_path, 'defaults')))
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dep_defaults_data = {}
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if os.path.isfile(defaults):
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dep_defaults_data = utils.parse_yaml_from_file(defaults)
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if 'role' in dep_vars:
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del dep_vars['role']
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self._build_role_dependencies([dep], dep_stack, passed_vars=dep_vars, level=level+1)
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dep_stack.append([dep,dep_path,dep_vars,dep_defaults_data])
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# only add the current role when we're at the top level,
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# otherwise we'll end up in a recursive loop
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if level == 0:
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self.included_roles.append(role)
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dep_stack.append([role,role_path,role_vars,defaults_data])
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return dep_stack
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def _load_role_defaults(self, defaults_files):
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# process default variables
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default_vars = {}
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for filename in defaults_files:
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if os.path.exists(filename):
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new_default_vars = utils.parse_yaml_from_file(filename)
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if new_default_vars:
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if type(new_default_vars) != dict:
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raise errors.AnsibleError("%s must be stored as dictonary/hash: %s" % (filename, type(new_default_vars)))
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default_vars = utils.combine_vars(default_vars, new_default_vars)
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return default_vars
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def _load_roles(self, roles, ds):
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# a role is a name that auto-includes the following if they exist
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# <rolename>/tasks/main.yml
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# <rolename>/handlers/main.yml
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# <rolename>/vars/main.yml
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# <rolename>/library
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# and it auto-extends tasks/handlers/vars_files/module paths as appropriate if found
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if roles is None:
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roles = []
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if type(roles) != list:
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raise errors.AnsibleError("value of 'roles:' must be a list")
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new_tasks = []
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new_handlers = []
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new_vars_files = []
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defaults_files = []
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pre_tasks = ds.get('pre_tasks', None)
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if type(pre_tasks) != list:
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pre_tasks = []
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for x in pre_tasks:
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new_tasks.append(x)
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# flush handlers after pre_tasks
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new_tasks.append(dict(meta='flush_handlers'))
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roles = self._build_role_dependencies(roles, [], self.vars)
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for (role,role_path,role_vars,default_vars) in roles:
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# special vars must be extracted from the dict to the included tasks
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special_keys = [ "sudo", "sudo_user", "when", "with_items" ]
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special_vars = {}
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for k in special_keys:
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if k in role_vars:
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special_vars[k] = role_vars[k]
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task_basepath = utils.path_dwim(self.basedir, os.path.join(role_path, 'tasks'))
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handler_basepath = utils.path_dwim(self.basedir, os.path.join(role_path, 'handlers'))
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vars_basepath = utils.path_dwim(self.basedir, os.path.join(role_path, 'vars'))
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defaults_basepath = utils.path_dwim(self.basedir, os.path.join(role_path, 'defaults'))
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task = self._resolve_main(task_basepath)
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handler = self._resolve_main(handler_basepath)
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vars_file = self._resolve_main(vars_basepath)
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defaults_file = self._resolve_main(defaults_basepath)
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library = utils.path_dwim(self.basedir, os.path.join(role_path, 'library'))
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if not os.path.isfile(task) and not os.path.isfile(handler) and not os.path.isfile(vars_file) and not os.path.isdir(library):
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raise errors.AnsibleError("found role at %s, but cannot find %s or %s or %s or %s" % (role_path, task, handler, vars_file, library))
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if os.path.isfile(task):
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nt = dict(include=pipes.quote(task), vars=role_vars, default_vars=default_vars)
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for k in special_keys:
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if k in special_vars:
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nt[k] = special_vars[k]
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new_tasks.append(nt)
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if os.path.isfile(handler):
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nt = dict(include=pipes.quote(handler), vars=role_vars)
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for k in special_keys:
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if k in special_vars:
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nt[k] = special_vars[k]
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new_handlers.append(nt)
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if os.path.isfile(vars_file):
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new_vars_files.append(vars_file)
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if os.path.isfile(defaults_file):
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defaults_files.append(defaults_file)
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if os.path.isdir(library):
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utils.plugins.module_finder.add_directory(library)
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tasks = ds.get('tasks', None)
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post_tasks = ds.get('post_tasks', None)
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handlers = ds.get('handlers', None)
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vars_files = ds.get('vars_files', None)
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if type(tasks) != list:
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tasks = []
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if type(handlers) != list:
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handlers = []
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if type(vars_files) != list:
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vars_files = []
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if type(post_tasks) != list:
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post_tasks = []
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new_tasks.extend(tasks)
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# flush handlers after tasks + role tasks
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new_tasks.append(dict(meta='flush_handlers'))
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new_tasks.extend(post_tasks)
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# flush handlers after post tasks
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new_tasks.append(dict(meta='flush_handlers'))
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new_handlers.extend(handlers)
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new_vars_files.extend(vars_files)
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ds['tasks'] = new_tasks
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ds['handlers'] = new_handlers
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ds['vars_files'] = new_vars_files
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self.default_vars = self._load_role_defaults(defaults_files)
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return ds
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# *************************************************
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def _resolve_main(self, basepath):
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''' flexibly handle variations in main filenames '''
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# these filenames are acceptable:
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mains = (
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os.path.join(basepath, 'main'),
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os.path.join(basepath, 'main.yml'),
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os.path.join(basepath, 'main.yaml'),
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)
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if sum([os.path.isfile(x) for x in mains]) > 1:
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raise errors.AnsibleError("found multiple main files at %s, only one allowed" % (basepath))
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else:
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for m in mains:
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if os.path.isfile(m):
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return m # exactly one main file
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return mains[0] # zero mains (we still need to return something)
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# *************************************************
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def _load_tasks(self, tasks, vars={}, default_vars={}, sudo_vars={}, additional_conditions=[], original_file=None):
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''' handle task and handler include statements '''
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results = []
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if tasks is None:
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# support empty handler files, and the like.
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tasks = []
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for x in tasks:
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if not isinstance(x, dict):
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raise errors.AnsibleError("expecting dict; got: %s" % x)
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# evaluate sudo vars for current and child tasks
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included_sudo_vars = {}
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for k in ["sudo", "sudo_user"]:
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if k in x:
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included_sudo_vars[k] = x[k]
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elif k in sudo_vars:
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included_sudo_vars[k] = sudo_vars[k]
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x[k] = sudo_vars[k]
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if 'meta' in x:
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if x['meta'] == 'flush_handlers':
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results.append(Task(self,x))
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continue
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task_vars = self.vars.copy()
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task_vars.update(vars)
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if original_file:
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task_vars['_original_file'] = original_file
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if 'include' in x:
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tokens = shlex.split(str(x['include']))
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items = ['']
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included_additional_conditions = list(additional_conditions)
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for k in x:
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if k.startswith("with_"):
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plugin_name = k[5:]
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if plugin_name not in utils.plugins.lookup_loader:
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raise errors.AnsibleError("cannot find lookup plugin named %s for usage in with_%s" % (plugin_name, plugin_name))
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terms = template(self.basedir, x[k], task_vars)
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items = utils.plugins.lookup_loader.get(plugin_name, basedir=self.basedir, runner=None).run(terms, inject=task_vars)
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elif k.startswith("when_"):
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included_additional_conditions.insert(0, utils.compile_when_to_only_if("%s %s" % (k[5:], x[k])))
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elif k == 'when':
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included_additional_conditions.insert(0, utils.compile_when_to_only_if("jinja2_compare %s" % x[k]))
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elif k in ("include", "vars", "default_vars", "only_if", "sudo", "sudo_user"):
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pass
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else:
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raise errors.AnsibleError("parse error: task includes cannot be used with other directives: %s" % k)
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default_vars = utils.combine_vars(self.default_vars, x.get('default_vars', {}))
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if 'vars' in x:
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task_vars = utils.combine_vars(task_vars, x['vars'])
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if 'only_if' in x:
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included_additional_conditions.append(x['only_if'])
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for item in items:
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mv = task_vars.copy()
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mv['item'] = item
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for t in tokens[1:]:
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(k,v) = t.split("=", 1)
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mv[k] = template(self.basedir, v, mv)
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dirname = self.basedir
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if original_file:
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dirname = os.path.dirname(original_file)
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include_file = template(dirname, tokens[0], mv)
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include_filename = utils.path_dwim(dirname, include_file)
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data = utils.parse_yaml_from_file(include_filename)
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results += self._load_tasks(data, mv, default_vars, included_sudo_vars, included_additional_conditions, original_file=include_filename)
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elif type(x) == dict:
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results.append(Task(self,x,module_vars=task_vars,default_vars=default_vars,additional_conditions=additional_conditions))
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else:
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raise Exception("unexpected task type")
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for x in results:
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if self.tags is not None:
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x.tags.extend(self.tags)
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return results
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# *************************************************
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def tasks(self):
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''' return task objects for this play '''
|
|
return self._tasks
|
|
|
|
def handlers(self):
|
|
''' return handler objects for this play '''
|
|
return self._handlers
|
|
|
|
# *************************************************
|
|
|
|
def _get_vars(self):
|
|
''' load the vars section from a play, accounting for all sorts of variable features
|
|
including loading from yaml files, prompting, and conditional includes of the first
|
|
file found in a list. '''
|
|
|
|
if self.vars is None:
|
|
self.vars = {}
|
|
|
|
if type(self.vars) not in [dict, list]:
|
|
raise errors.AnsibleError("'vars' section must contain only key/value pairs")
|
|
|
|
vars = {}
|
|
|
|
# translate a list of vars into a dict
|
|
if type(self.vars) == list:
|
|
for item in self.vars:
|
|
if getattr(item, 'items', None) is None:
|
|
raise errors.AnsibleError("expecting a key-value pair in 'vars' section")
|
|
k, v = item.items()[0]
|
|
vars[k] = v
|
|
else:
|
|
vars.update(self.vars)
|
|
|
|
if type(self.vars_prompt) == list:
|
|
for var in self.vars_prompt:
|
|
if not 'name' in var:
|
|
raise errors.AnsibleError("'vars_prompt' item is missing 'name:'")
|
|
|
|
vname = var['name']
|
|
prompt = var.get("prompt", vname)
|
|
default = var.get("default", None)
|
|
private = var.get("private", True)
|
|
|
|
confirm = var.get("confirm", False)
|
|
encrypt = var.get("encrypt", None)
|
|
salt_size = var.get("salt_size", None)
|
|
salt = var.get("salt", None)
|
|
|
|
if vname not in self.playbook.extra_vars:
|
|
vars[vname] = self.playbook.callbacks.on_vars_prompt(
|
|
vname, private, prompt, encrypt, confirm, salt_size, salt, default
|
|
)
|
|
|
|
elif type(self.vars_prompt) == dict:
|
|
for (vname, prompt) in self.vars_prompt.iteritems():
|
|
prompt_msg = "%s: " % prompt
|
|
if vname not in self.playbook.extra_vars:
|
|
vars[vname] = self.playbook.callbacks.on_vars_prompt(
|
|
varname=vname, private=False, prompt=prompt_msg, default=None
|
|
)
|
|
|
|
else:
|
|
raise errors.AnsibleError("'vars_prompt' section is malformed, see docs")
|
|
|
|
if type(self.playbook.extra_vars) == dict:
|
|
vars.update(self.playbook.extra_vars)
|
|
|
|
return vars
|
|
|
|
# *************************************************
|
|
|
|
def update_vars_files(self, hosts):
|
|
''' calculate vars_files, which requires that setup runs first so ansible facts can be mixed in '''
|
|
|
|
# now loop through all the hosts...
|
|
for h in hosts:
|
|
self._update_vars_files_for_host(h)
|
|
|
|
# *************************************************
|
|
|
|
def compare_tags(self, tags):
|
|
''' given a list of tags that the user has specified, return two lists:
|
|
matched_tags: tags were found within the current play and match those given
|
|
by the user
|
|
unmatched_tags: tags that were found within the current play but do not match
|
|
any provided by the user '''
|
|
|
|
# gather all the tags in all the tasks into one list
|
|
all_tags = []
|
|
for task in self._tasks:
|
|
if not task.meta:
|
|
all_tags.extend(task.tags)
|
|
|
|
# compare the lists of tags using sets and return the matched and unmatched
|
|
all_tags_set = set(all_tags)
|
|
tags_set = set(tags)
|
|
matched_tags = all_tags_set & tags_set
|
|
unmatched_tags = all_tags_set - tags_set
|
|
|
|
return matched_tags, unmatched_tags
|
|
|
|
# *************************************************
|
|
|
|
def _has_vars_in(self, msg):
|
|
return ((msg.find("$") != -1) or (msg.find("{{") != -1))
|
|
|
|
# *************************************************
|
|
|
|
def _update_vars_files_for_host(self, host):
|
|
|
|
if type(self.vars_files) != list:
|
|
self.vars_files = [ self.vars_files ]
|
|
|
|
if host is not None:
|
|
inject = {}
|
|
inject.update(self.playbook.inventory.get_variables(host))
|
|
inject.update(self.playbook.SETUP_CACHE[host])
|
|
|
|
for filename in self.vars_files:
|
|
|
|
if type(filename) == list:
|
|
|
|
# loop over all filenames, loading the first one, and failing if # none found
|
|
found = False
|
|
sequence = []
|
|
for real_filename in filename:
|
|
filename2 = template(self.basedir, real_filename, self.vars)
|
|
filename3 = filename2
|
|
if host is not None:
|
|
filename3 = template(self.basedir, filename2, inject)
|
|
filename4 = utils.path_dwim(self.basedir, filename3)
|
|
sequence.append(filename4)
|
|
if os.path.exists(filename4):
|
|
found = True
|
|
data = utils.parse_yaml_from_file(filename4)
|
|
if type(data) != dict:
|
|
raise errors.AnsibleError("%s must be stored as a dictionary/hash" % filename4)
|
|
if host is not None:
|
|
if self._has_vars_in(filename2) and not self._has_vars_in(filename3):
|
|
# this filename has variables in it that were fact specific
|
|
# so it needs to be loaded into the per host SETUP_CACHE
|
|
self.playbook.SETUP_CACHE[host].update(data)
|
|
self.playbook.callbacks.on_import_for_host(host, filename4)
|
|
elif not self._has_vars_in(filename4):
|
|
# found a non-host specific variable, load into vars and NOT
|
|
# the setup cache
|
|
self.vars.update(data)
|
|
elif host is not None:
|
|
self.playbook.callbacks.on_not_import_for_host(host, filename4)
|
|
if found:
|
|
break
|
|
if not found and host is not None:
|
|
raise errors.AnsibleError(
|
|
"%s: FATAL, no files matched for vars_files import sequence: %s" % (host, sequence)
|
|
)
|
|
|
|
else:
|
|
# just one filename supplied, load it!
|
|
|
|
filename2 = template(self.basedir, filename, self.vars)
|
|
filename3 = filename2
|
|
if host is not None:
|
|
filename3 = template(self.basedir, filename2, inject)
|
|
filename4 = utils.path_dwim(self.basedir, filename3)
|
|
if self._has_vars_in(filename4):
|
|
continue
|
|
new_vars = utils.parse_yaml_from_file(filename4)
|
|
if new_vars:
|
|
if type(new_vars) != dict:
|
|
raise errors.AnsibleError("%s must be stored as dictionary/hash: %s" % (filename4, type(new_vars)))
|
|
if host is not None and self._has_vars_in(filename2) and not self._has_vars_in(filename3):
|
|
# running a host specific pass and has host specific variables
|
|
# load into setup cache
|
|
self.playbook.SETUP_CACHE[host] = utils.combine_vars(
|
|
self.playbook.SETUP_CACHE[host], new_vars)
|
|
self.playbook.callbacks.on_import_for_host(host, filename4)
|
|
elif host is None:
|
|
# running a non-host specific pass and we can update the global vars instead
|
|
self.vars = utils.combine_vars(self.vars, new_vars)
|