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Fix for user defined modules not overriding modules from core.

Browse Source 
This fix takes into account that powershell modules are somewhat
different than regular modules and have to be kept separate.
pull/12420/head
Toshio Kuratomi 9 years ago
parent f61fb9787d
commit 18e2ee16ef
4 changed files with 131 additions and 64 deletions
Show Stats Download Patch File Download Diff File

122
lib/ansible/plugins/__init__.py
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@ -26,10 +26,9 @@ import inspect
import os
import os.path
import sys
from collections import defaultdict
from ansible import constants as C
from ansible.utils.unicode import to_unicode
from ansible import errors
try:
from __main__ import display
@ -37,6 +36,7 @@ except ImportError:
from ansible.utils.display import Display
display = Display()
# Global so that all instances of a PluginLoader will share the caches
MODULE_CACHE = {}
PATH_CACHE = {}
PLUGIN_PATH_CACHE = {}
@ -68,7 +68,7 @@ class PluginLoader:
if not class_name in PATH_CACHE:
PATH_CACHE[class_name] = None
if not class_name in PLUGIN_PATH_CACHE:
PLUGIN_PATH_CACHE[class_name] = {}
PLUGIN_PATH_CACHE[class_name] = defaultdict(dict)
self._module_cache = MODULE_CACHE[class_name]
self._paths = PATH_CACHE[class_name]
@ -169,9 +169,30 @@ class PluginLoader:
# look for any plugins installed in the package subtree
ret.extend(self._get_package_paths())
# HACK: because powershell modules are in the same directory
# hierarchy as other modules we have to process them last. This is
# because powershell only works on windows but the other modules work
# anywhere (possibly including windows if the correct language
# interpreter is installed). the non-powershell modules can have any
# file extension and thus powershell modules are picked up in that.
# The non-hack way to fix this is to have powershell modules be
# a different PluginLoader/ModuleLoader. But that requires changing
# other things too (known thing to change would be PATHS_CACHE,
# PLUGIN_PATHS_CACHE, and MODULE_CACHE. Since those three dicts key
# on the class_name and neither regular modules nor powershell modules
# would have class_names, they would not work as written.
reordered_paths = []
win_dirs = []
for path in ret:
if path.endswith('windows'):
win_dirs.append(path)
else:
reordered_paths.append(path)
reordered_paths.extend(win_dirs)
# cache and return the result
self._paths = ret
return ret
self._paths = reordered_paths
return reordered_paths
def add_directory(self, directory, with_subdir=False):
@ -187,55 +208,90 @@ class PluginLoader:
self._extra_dirs.append(directory)
self._paths = None
def find_plugin(self, name, suffixes=None):
def find_plugin(self, name, mod_type=''):
''' Find a plugin named name '''
if not suffixes:
if self.class_name:
suffixes = ['.py']
# The particular cache to look for modules within. This matches the
# requested mod_type
pull_cache = self._plugin_path_cache[mod_type]
try:
return pull_cache[name]
except KeyError:
# Cache miss. Now let's find the plugin
pass
if mod_type:
suffix = mod_type
elif self.class_name:
# Ansible plugins that run in the controller process (most plugins)
suffix = '.py'
else:
suffixes = ['.py', '']
potential_names = frozenset('%s%s' % (name, s) for s in suffixes)
for full_name in potential_names:
if full_name in self._plugin_path_cache:
return self._plugin_path_cache[full_name]
found = None
for path in [p for p in self._get_paths() if p not in self._searched_paths]:
if os.path.isdir(path):
# Only Ansible Modules. Ansible modules can be any executable so
# they can have any suffix
suffix = ''
### FIXME:
# Instead of using the self._paths cache (PATH_CACHE) and
# self._searched_paths we could use an iterator. Before enabling that
# we need to make sure we don't want to add additional directories
# (add_directory()) once we start using the iterator. Currently, it
# looks like _get_paths() never forces a cache refresh so if we expect
# additional directories to be added later, it is buggy.
for path in (p for p in self._get_paths() if p not in self._searched_paths and os.path.isdir(p)):
try:
full_paths = (os.path.join(path, f) for f in os.listdir(path))
except OSError as e:
display.warning("Error accessing plugin paths: %s" % str(e))
for full_path in (f for f in full_paths if os.path.isfile(f)):
for suffix in suffixes:
if full_path.endswith(suffix):
for full_path in (f for f in full_paths if os.path.isfile(f) and not f.endswith('__init__.py')):
full_name = os.path.basename(full_path)
break
else: # Yes, this is a for-else: http://bit.ly/1ElPkyg
# HACK: We have no way of executing python byte
# compiled files as ansible modules so specifically exclude them
if full_path.endswith(('.pyc', '.pyo')):
continue
if full_name not in self._plugin_path_cache:
self._plugin_path_cache[full_name] = full_path
splitname = os.path.splitext(full_name)
base_name = splitname[0]
try:
extension = splitname[1]
except IndexError:
extension = ''
# Module found, now enter it into the caches that match
# this file
if base_name not in self._plugin_path_cache['']:
self._plugin_path_cache[''][base_name] = full_path
if full_name not in self._plugin_path_cache['']:
self._plugin_path_cache[''][full_name] = full_path
if base_name not in self._plugin_path_cache[extension]:
self._plugin_path_cache[extension][base_name] = full_path
if full_name not in self._plugin_path_cache[extension]:
self._plugin_path_cache[extension][full_name] = full_path
self._searched_paths.add(path)
for full_name in potential_names:
if full_name in self._plugin_path_cache:
return self._plugin_path_cache[full_name]
try:
return pull_cache[name]
except KeyError:
# Didn't find the plugin in this directory. Load modules from
# the next one
pass
# if nothing is found, try finding alias/deprecated
if not name.startswith('_'):
for alias_name in ('_%s' % n for n in potential_names):
alias_name = '_' + name
# We've already cached all the paths at this point
if alias_name in self._plugin_path_cache:
if not os.path.islink(self._plugin_path_cache[alias_name]):
if alias_name in pull_cache:
if not os.path.islink(pull_cache[alias_name]):
display.deprecated('%s is kept for backwards compatibility '
'but usage is discouraged. The module '
'documentation details page may explain '
'more about this rationale.' %
name.lstrip('_'))
return self._plugin_path_cache[alias_name]
return pull_cache[alias_name]
return None

24
lib/ansible/plugins/action/__init__.py
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@ -69,30 +69,36 @@ class ActionBase:
'''
# Search module path(s) for named module.
module_suffixes = getattr(self._connection, 'default_suffixes', None)
for mod_type in self._connection.module_implementation_preferences:
# Check to determine if PowerShell modules are supported, and apply
# some fixes (hacks) to module name + args.
if module_suffixes and '.ps1' in module_suffixes:
# Use Windows versions of stat/file/copy modules when called from
# within other action plugins.
if mod_type == '.ps1':
# win_stat, win_file, and win_copy are not just like their
# python counterparts but they are compatible enough for our
# internal usage
if module_name in ('stat', 'file', 'copy') and self._task.action != module_name:
module_name = 'win_%s' % module_name
# Remove extra quotes surrounding path parameters before sending to module.
if module_name in ('win_stat', 'win_file', 'win_copy', 'slurp') and module_args and hasattr(self._connection._shell, '_unquote'):
for key in ('src', 'dest', 'path'):
if key in module_args:
module_args[key] = self._connection._shell._unquote(module_args[key])
module_path = self._shared_loader_obj.module_loader.find_plugin(module_name, module_suffixes)
if module_path is None:
module_path = self._shared_loader_obj.module_loader.find_plugin(module_name, mod_type)
if module_path:
break
else: # This is a for-else: http://bit.ly/1ElPkyg
# FIXME: Why is it necessary to look for the windows version?
# Shouldn't all modules be installed?
#
# Use Windows version of ping module to check module paths when
# using a connection that supports .ps1 suffixes.
if module_suffixes and '.ps1' in module_suffixes:
if '.ps1' in self._connection.module_implementation_preferences:
ping_module = 'win_ping'
else:
ping_module = 'ping'
module_path2 = self._shared_loader_obj.module_loader.find_plugin(ping_module, module_suffixes)
module_path2 = self._shared_loader_obj.module_loader.find_plugin(ping_module, self._connection.module_implementation_preferences)
if module_path2 is not None:
raise AnsibleError("The module %s was not found in configured module paths" % (module_name))
else:

4
lib/ansible/plugins/connection/__init__.py
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@ -57,6 +57,10 @@ class ConnectionBase(with_metaclass(ABCMeta, object)):
has_pipelining = False
become_methods = C.BECOME_METHODS
# When running over this connection type, prefer modules written in a certain language
# as discovered by the specified file extension. An empty string as the
# language means any language.
module_implementation_preferences = ('',)
def __init__(self, play_context, new_stdin, *args, **kwargs):
# All these hasattrs allow subclasses to override these parameters

3
lib/ansible/plugins/connection/winrm.py
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@ -52,10 +52,11 @@ from ansible.utils.unicode import to_bytes, to_unicode
class Connection(ConnectionBase):
'''WinRM connections over HTTP/HTTPS.'''
module_implementation_preferences = ('.ps1', '')
def __init__(self, *args, **kwargs):
self.has_pipelining = False
self.default_suffixes = ['.ps1', '']
self.protocol = None
self.shell_id = None
self.delegate = None

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