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Adds 'ansible_check_mode' boolean magic variable

* Makes it possible to pass any options variable to VariableManager
  by changing `load_options_vars(options)` in `lib/ansible/utils/vars.py`
This commit is contained in:
Strahinja Kustudić 2016-01-20 19:47:09 +01:00
parent 1942cd33dc
commit eed6cf5dad
7 changed files with 54 additions and 2 deletions

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@ -38,7 +38,25 @@ Example::
As a reminder, a task with a `when` clause evaluated to false, will
still be skipped even if it has a `always_run` clause evaluated to
true.
true.
Also if you want to skip, or ignore errors on some tasks in check mode
you can use a boolean magic variable `ansible_check_mode` (added in version 2.1)
which will be set to `True` during check mode.
Example::
tasks:
- name: this task will be skipped in check mode
git: repo=ssh://git@github.com/mylogin/hello.git dest=/home/mylogin/hello
when: not ansible_check_mode
- name: this task will ignore errors in check mode
git: repo=ssh://git@github.com/mylogin/hello.git dest=/home/mylogin/hello
ignore_errors: "{{ ansible_check_mode }}"
.. _diff_mode:

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@ -674,7 +674,9 @@ Don't worry about any of this unless you think you need it. You'll know when yo
Also available, ``inventory_dir`` is the pathname of the directory holding Ansible's inventory host file, ``inventory_file`` is the pathname and the filename pointing to the Ansible's inventory host file.
And finally, ``role_path`` will return the current role's pathname (since 1.8). This will only work inside a role.
We then have ``role_path`` which will return the current role's pathname (since 1.8). This will only work inside a role.
And finally, ``ansible_check_mode`` (added in version 2.1), a boolean magic variable which will be set to ``True`` if you run Ansible with ``--check``.
.. _variable_file_separation_details:

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@ -32,6 +32,7 @@ from ansible.parsing.splitter import parse_kv
from ansible.playbook.play import Play
from ansible.plugins import get_all_plugin_loaders
from ansible.utils.vars import load_extra_vars
from ansible.utils.vars import load_options_vars
from ansible.utils.unicode import to_unicode
from ansible.vars import VariableManager
@ -123,6 +124,8 @@ class AdHocCLI(CLI):
variable_manager = VariableManager()
variable_manager.extra_vars = load_extra_vars(loader=loader, options=self.options)
variable_manager.options_vars = load_options_vars(self.options)
inventory = Inventory(loader=loader, variable_manager=variable_manager, host_list=self.options.inventory)
variable_manager.set_inventory(inventory)

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@ -33,6 +33,7 @@ from ansible.parsing.dataloader import DataLoader
from ansible.playbook.block import Block
from ansible.playbook.play_context import PlayContext
from ansible.utils.vars import load_extra_vars
from ansible.utils.vars import load_options_vars
from ansible.vars import VariableManager
try:
@ -125,6 +126,8 @@ class PlaybookCLI(CLI):
variable_manager = VariableManager()
variable_manager.extra_vars = load_extra_vars(loader=loader, options=self.options)
variable_manager.options_vars = load_options_vars(self.options)
# create the inventory, and filter it based on the subset specified (if any)
inventory = Inventory(loader=loader, variable_manager=variable_manager, host_list=self.options.inventory)
variable_manager.set_inventory(inventory)

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@ -111,6 +111,13 @@ def load_extra_vars(loader, options):
extra_vars = combine_vars(extra_vars, data)
return extra_vars
def load_options_vars(options):
options_vars = {}
# For now only return check mode, but we can easily return more
# options if we need variables for them
options_vars['ansible_check_mode'] = options.check
return options_vars
def isidentifier(ident):
"""
Determines, if string is valid Python identifier using the ast module.

View file

@ -99,6 +99,7 @@ class VariableManager:
self._inventory = None
self._hostvars = None
self._omit_token = '__omit_place_holder__%s' % sha1(os.urandom(64)).hexdigest()
self._options_vars = defaultdict(dict)
def __getstate__(self):
data = dict(
@ -109,6 +110,7 @@ class VariableManager:
host_vars_files = self._host_vars_files,
group_vars_files = self._group_vars_files,
omit_token = self._omit_token,
options_vars = self._options_vars,
#inventory = self._inventory,
)
return data
@ -122,6 +124,7 @@ class VariableManager:
self._group_vars_files = data.get('group_vars_files', defaultdict(dict))
self._omit_token = data.get('omit_token', '__omit_place_holder__%s' % sha1(os.urandom(64)).hexdigest())
self._inventory = data.get('inventory', None)
self._options_vars = data.get('options_vars', dict())
def _get_cache_entry(self, play=None, host=None, task=None):
play_id = "NONE"
@ -152,6 +155,17 @@ class VariableManager:
def set_inventory(self, inventory):
self._inventory = inventory
@property
def options_vars(self):
''' ensures a clean copy of the options_vars are made '''
return self._options_vars.copy()
@options_vars.setter
def options_vars(self, value):
''' ensures a clean copy of the options_vars are used to set the value '''
assert isinstance(value, dict)
self._options_vars = value.copy()
def _preprocess_vars(self, a):
'''
Ensures that vars contained in the parameter passed in are
@ -392,6 +406,9 @@ class VariableManager:
# the 'omit' value alows params to be left out if the variable they are based on is undefined
variables['omit'] = self._omit_token
variables['ansible_version'] = CLI.version_info(gitinfo=False)
# Set options vars
for option, option_value in self._options_vars.iteritems():
variables[option] = option_value
if self._hostvars is not None and include_hostvars:
variables['hostvars'] = self._hostvars

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@ -49,6 +49,8 @@ class TestVariableManager(unittest.TestCase):
del vars['vars']
if 'ansible_version' in vars:
del vars['ansible_version']
if 'ansible_check_mode' in vars:
del vars['ansible_check_mode']
self.assertEqual(vars, dict(playbook_dir='.'))