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# (c) 2012-2013, Michael DeHaan <>
# 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
# 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 <>.
from ansible import utils
from ansible import errors
from ansible.playbook.task import Task
import shlex
import os
class Play(object):
__slots__ = [
'hosts', 'name', 'vars', 'vars_prompt', 'vars_files',
'handlers', 'remote_user', 'remote_port',
'sudo', 'sudo_user', 'transport', 'playbook',
'tags', 'gather_facts', 'serial', '_ds', '_handlers', '_tasks',
# to catch typos and so forth -- these are userland names
# and don't line up 1:1 with how they are stored
'hosts', 'name', 'vars', 'vars_prompt', 'vars_files',
'tasks', 'handlers', 'user', 'port', 'include',
'sudo', 'sudo_user', 'connection', 'tags', 'gather_facts', 'serial'
# *************************************************
def __init__(self, playbook, ds, basedir):
''' constructor loads from a play datastructure '''
for x in ds.keys():
if not x in Play.VALID_KEYS:
raise errors.AnsibleError("%s is not a legal parameter in an Ansible Playbook" % x)
# TODO: more error handling
hosts = ds.get('hosts')
if hosts is None:
raise errors.AnsibleError('hosts declaration is required')
elif isinstance(hosts, list):
hosts = ';'.join(hosts)
self._ds = ds
self.playbook = playbook
self.basedir = basedir
self.vars = ds.get('vars', {})
self.vars_files = ds.get('vars_files', [])
self.vars_prompt = ds.get('vars_prompt', {})
self.vars = self._get_vars()
self.hosts = utils.template(basedir, hosts, self.vars) = ds.get('name', self.hosts)
self._tasks = ds.get('tasks', [])
self._handlers = ds.get('handlers', [])
self.remote_user = utils.template(basedir, ds.get('user', self.playbook.remote_user), self.vars)
self.remote_port = ds.get('port', self.playbook.remote_port)
self.sudo = ds.get('sudo', self.playbook.sudo)
self.sudo_user = utils.template(basedir, ds.get('sudo_user', self.playbook.sudo_user), self.vars)
self.transport = ds.get('connection', self.playbook.transport)
self.tags = ds.get('tags', None)
self.gather_facts = ds.get('gather_facts', None)
self.serial = int(utils.template(basedir, ds.get('serial', 0), self.vars))
self.remote_port = utils.template(basedir, self.remote_port, self.vars)
load_vars = {}
if self.playbook.inventory.basedir() is not None:
load_vars['inventory_dir'] = self.playbook.inventory.basedir();
self._tasks = self._load_tasks(self._ds.get('tasks', []), load_vars)
self._handlers = self._load_tasks(self._ds.get('handlers', []), load_vars)
if self.tags is None:
self.tags = []
elif type(self.tags) in [ str, unicode ]:
self.tags = [ self.tags ]
elif type(self.tags) != list:
self.tags = []
if self.sudo_user != 'root':
self.sudo = True
# *************************************************
def _load_tasks(self, tasks, vars={}, additional_conditions=[]):
''' handle task and handler include statements '''
results = []
if tasks is None:
# support empty handler files, and the like.
tasks = []
for x in tasks:
if not isinstance(x, dict):
raise errors.AnsibleError("expecting dict; got: %s" % x)
task_vars = self.vars.copy()
if 'include' in x:
tokens = shlex.split(x['include'])
items = ['']
included_additional_conditions = list(additional_conditions)
for k in x:
if k.startswith("with_"):
plugin_name = k[5:]
if plugin_name not in utils.plugins.lookup_loader:
raise errors.AnsibleError("cannot find lookup plugin named %s for usage in with_%s" % (plugin_name, plugin_name))
terms = utils.template(self.basedir, x[k], task_vars)
items = utils.plugins.lookup_loader.get(plugin_name, basedir=self.basedir, runner=None).run(terms, inject=task_vars)
elif k.startswith("when_"):
included_additional_conditions.append(utils.compile_when_to_only_if("%s %s" % (k[5:], x[k])))
elif k in ("include", "vars", "only_if"):
raise errors.AnsibleError("parse error: task includes cannot be used with other directives: %s" % k)
if 'vars' in x:
if 'only_if' in x:
for item in items:
mv = task_vars.copy()
mv['item'] = item
for t in tokens[1:]:
(k,v) = t.split("=", 1)
mv[k] = utils.template(self.basedir, v, mv)
include_file = utils.template(self.basedir, tokens[0], mv)
data = utils.parse_yaml_from_file(utils.path_dwim(self.basedir, include_file))
results += self._load_tasks(data, mv, included_additional_conditions)
elif type(x) == dict:
results.append(Task(self,x,module_vars=task_vars, additional_conditions=additional_conditions))
raise Exception("unexpected task type")
for x in results:
if self.tags is not None:
return results
# *************************************************
def tasks(self):
''' 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
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
raise errors.AnsibleError("'vars_prompt' section is malformed, see docs")
if type(self.playbook.extra_vars) == dict:
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:
# *************************************************
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:
# 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 = {}
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 = utils.template(self.basedir, real_filename, self.vars)
filename3 = filename2
if host is not None:
filename3 = utils.template(self.basedir, filename2, inject)
filename4 = utils.path_dwim(self.basedir, filename3)
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.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
elif host is not None:
self.playbook.callbacks.on_not_import_for_host(host, filename4)
if found:
if not found and host is not None:
raise errors.AnsibleError(
"%s: FATAL, no files matched for vars_files import sequence: %s" % (host, sequence)
# just one filename supplied, load it!
filename2 = utils.template(self.basedir, filename, self.vars)
filename3 = filename2
if host is not None:
filename3 = utils.template(self.basedir, filename2, inject)
filename4 = utils.path_dwim(self.basedir, filename3)
if self._has_vars_in(filename4):
new_vars = utils.parse_yaml_from_file(filename4)
if new_vars:
if type(new_vars) != dict:
raise errors.AnsibleError("%s must be stored as dictonary/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)
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