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Fix for user defined modules not overriding modules from core.

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This fix takes into account that powershell modules are somewhat
different than regular modules and have to be kept separate.
This commit is contained in:
Toshio Kuratomi 2015-09-10 12:55:59 -07:00
parent f61fb9787d
commit 18e2ee16ef
4 changed files with 128 additions and 61 deletions
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142
lib/ansible/plugins/__init__.py
View file

@ -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']
else:
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
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]
if mod_type:
suffix = mod_type
elif self.class_name:
# Ansible plugins that run in the controller process (most plugins)
suffix = '.py'
else:
# Only Ansible Modules. Ansible modules can be any executable so
# they can have any suffix
suffix = ''
found = None
for path in [p for p in self._get_paths() if p not in self._searched_paths]:
if os.path.isdir(path):
### 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) and not f.endswith('__init__.py')):
full_name = os.path.basename(full_path)
# 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
splitname = os.path.splitext(full_name)
base_name = splitname[0]
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):
full_name = os.path.basename(full_path)
break
else: # Yes, this is a for-else: http://bit.ly/1ElPkyg
continue
extension = splitname[1]
except IndexError:
extension = ''
if full_name not in self._plugin_path_cache:
self._plugin_path_cache[full_name] = full_path
# 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):
# 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]):
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]
alias_name = '_' + name
# We've already cached all the paths at this point
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 pull_cache[alias_name]
return None

40
lib/ansible/plugins/action/__init__.py
View file

@ -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 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
# 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 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])
# 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
View file

@ -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
View file

@ -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