mirror of
https://github.com/ARM-software/workload-automation.git
synced 2025-01-19 04:21:17 +00:00
b41c3a3ea2
Implement __str__ for Plugin in order to provide more readable representations in logging.
684 lines
25 KiB
Python
684 lines
25 KiB
Python
# Copyright 2013-2015 ARM Limited
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
|
|
|
|
# pylint: disable=E1101
|
|
import os
|
|
import sys
|
|
import inspect
|
|
import imp
|
|
import string
|
|
import logging
|
|
from collections import OrderedDict, defaultdict
|
|
from itertools import chain
|
|
from copy import copy
|
|
|
|
from wa.framework.configuration.core import settings, ConfigurationPoint as Parameter
|
|
from wa.framework.exception import (NotFoundError, PluginLoaderError, TargetError,
|
|
ValidationError, ConfigError, HostError)
|
|
from wa.utils import log
|
|
from wa.utils.misc import (ensure_directory_exists as _d, walk_modules, load_class,
|
|
merge_dicts_simple, get_article)
|
|
from wa.utils.types import identifier
|
|
|
|
|
|
MODNAME_TRANS = string.maketrans(':/\\.', '____')
|
|
|
|
|
|
class AttributeCollection(object):
|
|
"""
|
|
Accumulator for plugin attribute objects (such as Parameters or Artifacts).
|
|
|
|
This will replace any class member list accumulating such attributes
|
|
through the magic of metaprogramming\ [*]_.
|
|
|
|
.. [*] which is totally safe and not going backfire in any way...
|
|
|
|
"""
|
|
|
|
@property
|
|
def values(self):
|
|
return self._attrs.values()
|
|
|
|
def __init__(self, attrcls):
|
|
self._attrcls = attrcls
|
|
self._attrs = OrderedDict()
|
|
|
|
def add(self, p):
|
|
p = self._to_attrcls(p)
|
|
if p.name in self._attrs:
|
|
if p.override:
|
|
newp = copy(self._attrs[p.name])
|
|
for a, v in p.__dict__.iteritems():
|
|
if v is not None:
|
|
setattr(newp, a, v)
|
|
if not hasattr(newp, "_overridden"):
|
|
# pylint: disable=protected-access
|
|
newp._overridden = p._owner
|
|
self._attrs[p.name] = newp
|
|
else:
|
|
# Duplicate attribute condition is check elsewhere.
|
|
pass
|
|
else:
|
|
self._attrs[p.name] = p
|
|
|
|
append = add
|
|
|
|
def __str__(self):
|
|
return 'AC({})'.format(map(str, self._attrs.values()))
|
|
|
|
__repr__ = __str__
|
|
|
|
def _to_attrcls(self, p):
|
|
if not isinstance(p, self._attrcls):
|
|
raise ValueError('Invalid attribute value: {}; must be a {}'.format(p, self._attrcls))
|
|
if p.name in self._attrs and not p.override:
|
|
raise ValueError('Attribute {} has already been defined.'.format(p.name))
|
|
return p
|
|
|
|
def __iadd__(self, other):
|
|
for p in other:
|
|
self.add(p)
|
|
return self
|
|
|
|
def __iter__(self):
|
|
return iter(self.values)
|
|
|
|
def __contains__(self, p):
|
|
return p in self._attrs
|
|
|
|
def __getitem__(self, i):
|
|
return self._attrs[i]
|
|
|
|
def __len__(self):
|
|
return len(self._attrs)
|
|
|
|
|
|
class AliasCollection(AttributeCollection):
|
|
|
|
def __init__(self):
|
|
super(AliasCollection, self).__init__(Alias)
|
|
|
|
def _to_attrcls(self, p):
|
|
if isinstance(p, (list, tuple)):
|
|
# must be in the form (name, {param: value, ...})
|
|
# pylint: disable=protected-access
|
|
p = self._attrcls(p[1], **p[1])
|
|
elif not isinstance(p, self._attrcls):
|
|
raise ValueError('Invalid parameter value: {}'.format(p))
|
|
if p.name in self._attrs:
|
|
raise ValueError('Attribute {} has already been defined.'.format(p.name))
|
|
return p
|
|
|
|
|
|
class ListCollection(list):
|
|
|
|
def __init__(self, attrcls): # pylint: disable=unused-argument
|
|
super(ListCollection, self).__init__()
|
|
|
|
|
|
class Alias(object):
|
|
"""
|
|
This represents a configuration alias for an plugin, mapping an alternative
|
|
name to a set of parameter values, effectively providing an alternative set
|
|
of default values.
|
|
|
|
"""
|
|
|
|
def __init__(self, name, **kwargs):
|
|
self.name = name
|
|
self.params = kwargs
|
|
self.plugin_name = None # gets set by the MetaClass
|
|
|
|
def validate(self, ext):
|
|
ext_params = set(p.name for p in ext.parameters)
|
|
for param in self.params:
|
|
if param not in ext_params:
|
|
# Raising config error because aliases might have come through
|
|
# the config.
|
|
msg = 'Parameter {} (defined in alias {}) is invalid for {}'
|
|
raise ConfigError(msg.format(param, self.name, ext.name))
|
|
|
|
|
|
class PluginMeta(type):
|
|
"""
|
|
This basically adds some magic to plugins to make implementing new plugins,
|
|
such as workloads less complicated.
|
|
|
|
It ensures that certain class attributes (specified by the ``to_propagate``
|
|
attribute of the metaclass) get propagated down the inheritance hierarchy.
|
|
The assumption is that the values of the attributes specified in the class
|
|
are iterable; if that is not met, Bad Things (tm) will happen.
|
|
|
|
"""
|
|
|
|
to_propagate = [
|
|
('parameters', Parameter, AttributeCollection),
|
|
]
|
|
|
|
def __new__(mcs, clsname, bases, attrs):
|
|
mcs._propagate_attributes(bases, attrs, clsname)
|
|
cls = type.__new__(mcs, clsname, bases, attrs)
|
|
mcs._setup_aliases(cls)
|
|
return cls
|
|
|
|
@classmethod
|
|
def _propagate_attributes(mcs, bases, attrs, clsname):
|
|
"""
|
|
For attributes specified by to_propagate, their values will be a union of
|
|
that specified for cls and its bases (cls values overriding those of bases
|
|
in case of conflicts).
|
|
|
|
"""
|
|
for prop_attr, attr_cls, attr_collector_cls in mcs.to_propagate:
|
|
should_propagate = False
|
|
propagated = attr_collector_cls(attr_cls)
|
|
for base in bases:
|
|
if hasattr(base, prop_attr):
|
|
propagated += getattr(base, prop_attr) or []
|
|
should_propagate = True
|
|
if prop_attr in attrs:
|
|
pattrs = attrs[prop_attr] or []
|
|
for pa in pattrs:
|
|
if not isinstance(pa, attr_cls):
|
|
msg = 'Invalid value "{}" for attribute "{}"; must be a {}'
|
|
raise ValueError(msg.format(pa, prop_attr, attr_cls))
|
|
pa._owner = clsname
|
|
propagated += pattrs
|
|
should_propagate = True
|
|
if should_propagate:
|
|
for p in propagated:
|
|
override = bool(getattr(p, "override", None))
|
|
overridden = bool(getattr(p, "_overridden", None))
|
|
if override != overridden:
|
|
msg = "Overriding non existing parameter '{}' inside '{}'"
|
|
raise ValueError(msg.format(p.name, p._owner))
|
|
attrs[prop_attr] = propagated
|
|
|
|
@classmethod
|
|
def _setup_aliases(mcs, cls):
|
|
if hasattr(cls, 'aliases'):
|
|
aliases, cls.aliases = cls.aliases, AliasCollection()
|
|
for alias in aliases:
|
|
if isinstance(alias, basestring):
|
|
alias = Alias(alias)
|
|
alias.validate(cls)
|
|
alias.plugin_name = cls.name
|
|
cls.aliases.add(alias)
|
|
|
|
|
|
class Plugin(object):
|
|
"""
|
|
Base class for all WA plugins. An plugin is basically a plug-in. It
|
|
extends the functionality of WA in some way. Plugins are discovered and
|
|
loaded dynamically by the plugin loader upon invocation of WA scripts.
|
|
Adding an plugin is a matter of placing a class that implements an
|
|
appropriate interface somewhere it would be discovered by the loader. That
|
|
"somewhere" is typically one of the plugin subdirectories under
|
|
``~/.workload_automation/``.
|
|
|
|
"""
|
|
__metaclass__ = PluginMeta
|
|
|
|
kind = None
|
|
name = None
|
|
parameters = []
|
|
artifacts = []
|
|
aliases = []
|
|
core_modules = []
|
|
|
|
@classmethod
|
|
def get_default_config(cls):
|
|
return {p.name: p.default for p in cls.parameters}
|
|
|
|
@property
|
|
def dependencies_directory(self):
|
|
return _d(os.path.join(settings.dependencies_directory, self.name))
|
|
|
|
@property
|
|
def _classname(self):
|
|
return self.__class__.__name__
|
|
|
|
def __init__(self, **kwargs):
|
|
self.logger = logging.getLogger(self.name)
|
|
self._modules = []
|
|
self.capabilities = getattr(self.__class__, 'capabilities', [])
|
|
for param in self.parameters:
|
|
param.set_value(self, kwargs.get(param.name))
|
|
for key in kwargs:
|
|
if key not in self.parameters:
|
|
message = 'Unexpected parameter "{}" for {}'
|
|
raise ConfigError(message.format(key, self.name))
|
|
|
|
def get_config(self):
|
|
"""
|
|
Returns current configuration (i.e. parameter values) of this plugin.
|
|
|
|
"""
|
|
config = {}
|
|
for param in self.parameters:
|
|
config[param.name] = getattr(self, param.name, None)
|
|
return config
|
|
|
|
def validate(self):
|
|
"""
|
|
Perform basic validation to ensure that this plugin is capable of
|
|
running. This is intended as an early check to ensure the plugin has
|
|
not been mis-configured, rather than a comprehensive check (that may,
|
|
e.g., require access to the execution context).
|
|
|
|
This method may also be used to enforce (i.e. set as well as check)
|
|
inter-parameter constraints for the plugin (e.g. if valid values for
|
|
parameter A depend on the value of parameter B -- something that is not
|
|
possible to enfroce using ``Parameter``\ 's ``constraint`` attribute.
|
|
|
|
"""
|
|
if self.name is None:
|
|
raise ValidationError('Name not set for {}'.format(self._classname))
|
|
for param in self.parameters:
|
|
param.validate(self)
|
|
|
|
def __getattr__(self, name):
|
|
if name == '_modules':
|
|
raise ValueError('_modules accessed too early!')
|
|
for module in self._modules:
|
|
if hasattr(module, name):
|
|
return getattr(module, name)
|
|
raise AttributeError(name)
|
|
|
|
def load_modules(self, loader):
|
|
"""
|
|
Load the modules specified by the "modules" Parameter using the
|
|
provided loader. A loader can be any object that has an atribute called
|
|
"get_module" that implements the following signature::
|
|
|
|
get_module(name, owner, **kwargs)
|
|
|
|
and returns an instance of :class:`wa.core.plugin.Module`. If the
|
|
module with the specified name is not found, the loader must raise an
|
|
appropriate exception.
|
|
|
|
"""
|
|
modules = list(reversed(self.core_modules)) +\
|
|
list(reversed(self.modules or []))
|
|
if not modules:
|
|
return
|
|
for module_spec in modules:
|
|
if not module_spec:
|
|
continue
|
|
module = self._load_module(loader, module_spec)
|
|
self._install_module(module)
|
|
|
|
def has(self, capability):
|
|
"""
|
|
Check if this plugin has the specified capability. The alternative
|
|
method ``can`` is identical to this. Which to use is up to the caller
|
|
depending on what makes semantic sense in the context of the
|
|
capability, e.g. ``can('hard_reset')`` vs ``has('active_cooling')``.
|
|
|
|
"""
|
|
return capability in self.capabilities
|
|
|
|
can = has
|
|
|
|
def _load_module(self, loader, module_spec):
|
|
if isinstance(module_spec, basestring):
|
|
name = module_spec
|
|
params = {}
|
|
elif isinstance(module_spec, dict):
|
|
if len(module_spec) != 1:
|
|
msg = 'Invalid module spec: {}; dict must have exctly one key -- '\
|
|
'the module name.'
|
|
raise ValueError(msg.format(module_spec))
|
|
name, params = module_spec.items()[0]
|
|
else:
|
|
message = 'Invalid module spec: {}; must be a string or a one-key dict.'
|
|
raise ValueError(message.format(module_spec))
|
|
|
|
if not isinstance(params, dict):
|
|
message = 'Invalid module spec: {}; dict value must also be a dict.'
|
|
raise ValueError(message.format(module_spec))
|
|
|
|
module = loader.get_module(name, owner=self, **params)
|
|
module.initialize(None)
|
|
return module
|
|
|
|
def _install_module(self, module):
|
|
for capability in module.capabilities:
|
|
if capability not in self.capabilities:
|
|
self.capabilities.append(capability)
|
|
self._modules.append(module)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
def __repr__(self):
|
|
params = []
|
|
for param in self.parameters:
|
|
params.append('{}={}'.format(param.name,
|
|
getattr(self, param.name, None)))
|
|
return '{}({})'.format(self.name, ', '.join(params))
|
|
|
|
|
|
class TargetedPlugin(Plugin):
|
|
"""
|
|
A plugin that interacts with a target device.
|
|
|
|
"""
|
|
|
|
suppoted_targets = []
|
|
|
|
@classmethod
|
|
def check_compatible(cls, target):
|
|
if cls.suppoted_targets:
|
|
if target.os not in cls.suppoted_targets:
|
|
msg = 'Incompatible target OS "{}" for {}'
|
|
raise TargetError(msg.format(target.os, cls.name))
|
|
|
|
def __init__(self, target, **kwargs):
|
|
super(TargetedPlugin, self).__init__(**kwargs)
|
|
self.check_compatible(target)
|
|
self.target = target
|
|
|
|
|
|
class PluginLoaderItem(object):
|
|
|
|
def __init__(self, ext_tuple):
|
|
self.name = ext_tuple.name
|
|
self.default_package = ext_tuple.default_package
|
|
self.default_path = ext_tuple.default_path
|
|
self.cls = load_class(ext_tuple.cls)
|
|
|
|
|
|
class PluginLoader(object):
|
|
"""
|
|
Discovers, enumerates and loads available devices, configs, etc.
|
|
The loader will attempt to discover things on construction by looking
|
|
in predetermined set of locations defined by default_paths. Optionally,
|
|
additional locations may specified through paths parameter that must
|
|
be a list of additional Python module paths (i.e. dot-delimited).
|
|
|
|
"""
|
|
|
|
def __init__(self, packages=None, paths=None, ignore_paths=None,
|
|
keep_going=False):
|
|
"""
|
|
params::
|
|
|
|
:packages: List of packages to load plugins from.
|
|
:paths: List of paths to be searched for Python modules containing
|
|
WA plugins.
|
|
:ignore_paths: List of paths to ignore when search for WA plugins
|
|
(these would typically be subdirectories of one or
|
|
more locations listed in ``paths`` parameter.
|
|
:keep_going: Specifies whether to keep going if an error occurs while
|
|
loading plugins.
|
|
"""
|
|
self.logger = logging.getLogger('pluginloader')
|
|
self.keep_going = keep_going
|
|
self.packages = packages or []
|
|
self.paths = paths or []
|
|
self.ignore_paths = ignore_paths or []
|
|
self.plugins = {}
|
|
self.kind_map = defaultdict(dict)
|
|
self.aliases = {}
|
|
self.global_param_aliases = {}
|
|
self._discover_from_packages(self.packages)
|
|
self._discover_from_paths(self.paths, self.ignore_paths)
|
|
|
|
def update(self, packages=None, paths=None, ignore_paths=None):
|
|
""" Load plugins from the specified paths/packages
|
|
without clearing or reloading existing plugin. """
|
|
msg = 'Updating from: packages={} paths={}'
|
|
self.logger.debug(msg.format(packages, paths))
|
|
if packages:
|
|
self.packages.extend(packages)
|
|
self._discover_from_packages(packages)
|
|
if paths:
|
|
self.paths.extend(paths)
|
|
self.ignore_paths.extend(ignore_paths or [])
|
|
self._discover_from_paths(paths, ignore_paths or [])
|
|
|
|
def clear(self):
|
|
""" Clear all discovered items. """
|
|
self.plugins = {}
|
|
self.kind_map.clear()
|
|
|
|
def reload(self):
|
|
""" Clear all discovered items and re-run the discovery. """
|
|
self.logger.debug('Reloading')
|
|
self.clear()
|
|
self._discover_from_packages(self.packages)
|
|
self._discover_from_paths(self.paths, self.ignore_paths)
|
|
|
|
def get_plugin_class(self, name, kind=None):
|
|
"""
|
|
Return the class for the specified plugin if found or raises ``ValueError``.
|
|
|
|
"""
|
|
name, _ = self.resolve_alias(name)
|
|
if kind is None:
|
|
try:
|
|
return self.plugins[name]
|
|
except KeyError:
|
|
raise NotFoundError('plugins {} not found.'.format(name))
|
|
if kind not in self.kind_map:
|
|
raise ValueError('Unknown plugin type: {}'.format(kind))
|
|
store = self.kind_map[kind]
|
|
if name not in store:
|
|
msg = 'plugins {} is not {} {}.'
|
|
raise NotFoundError(msg.format(name, get_article(kind), kind))
|
|
return store[name]
|
|
|
|
def get_plugin(self, name=None, kind=None, *args, **kwargs):
|
|
"""
|
|
Return plugin of the specified kind with the specified name. Any
|
|
additional parameters will be passed to the plugin's __init__.
|
|
|
|
"""
|
|
name, base_kwargs = self.resolve_alias(name)
|
|
kwargs = OrderedDict(chain(base_kwargs.iteritems(), kwargs.iteritems()))
|
|
cls = self.get_plugin_class(name, kind)
|
|
plugin = cls(*args, **kwargs)
|
|
return plugin
|
|
|
|
def get_default_config(self, name):
|
|
"""
|
|
Returns the default configuration for the specified plugin name. The
|
|
name may be an alias, in which case, the returned config will be
|
|
augmented with appropriate alias overrides.
|
|
|
|
"""
|
|
real_name, alias_config = self.resolve_alias(name)
|
|
base_default_config = self.get_plugin_class(real_name).get_default_config()
|
|
return merge_dicts_simple(base_default_config, alias_config)
|
|
|
|
def list_plugins(self, kind=None):
|
|
"""
|
|
List discovered plugin classes. Optionally, only list plugins of a
|
|
particular type.
|
|
|
|
"""
|
|
if kind is None:
|
|
return self.plugins.values()
|
|
if kind not in self.kind_map:
|
|
raise ValueError('Unknown plugin type: {}'.format(kind))
|
|
return self.kind_map[kind].values()
|
|
|
|
def has_plugin(self, name, kind=None):
|
|
"""
|
|
Returns ``True`` if an plugins with the specified ``name`` has been
|
|
discovered by the loader. If ``kind`` was specified, only returns ``True``
|
|
if the plugin has been found, *and* it is of the specified kind.
|
|
|
|
"""
|
|
try:
|
|
self.get_plugin_class(name, kind)
|
|
return True
|
|
except NotFoundError:
|
|
return False
|
|
|
|
def resolve_alias(self, alias_name):
|
|
"""
|
|
Try to resolve the specified name as an plugin alias. Returns a
|
|
two-tuple, the first value of which is actual plugin name, and the
|
|
iisecond is a dict of parameter values for this alias. If the name passed
|
|
is already an plugin name, then the result is ``(alias_name, {})``.
|
|
|
|
"""
|
|
alias_name = identifier(alias_name.lower())
|
|
if alias_name in self.plugins:
|
|
return (alias_name, {})
|
|
if alias_name in self.aliases:
|
|
alias = self.aliases[alias_name]
|
|
return (alias.plugin_name, alias.params)
|
|
raise NotFoundError('Could not find plugin or alias "{}"'.format(alias_name))
|
|
|
|
# Internal methods.
|
|
|
|
def __getattr__(self, name):
|
|
"""
|
|
This resolves methods for specific plugins types based on corresponding
|
|
generic plugin methods. So it's possible to say things like ::
|
|
|
|
loader.get_device('foo')
|
|
|
|
instead of ::
|
|
|
|
loader.get_plugin('foo', kind='device')
|
|
|
|
"""
|
|
error_msg = 'No plugins of type "{}" discovered'
|
|
if name.startswith('get_'):
|
|
name = name.replace('get_', '', 1)
|
|
if name in self.kind_map:
|
|
def __wrapper(pname, *args, **kwargs):
|
|
return self.get_plugin(pname, name, *args, **kwargs)
|
|
return __wrapper
|
|
raise NotFoundError(error_msg.format(name))
|
|
if name.startswith('list_'):
|
|
name = name.replace('list_', '', 1).rstrip('s')
|
|
if name in self.kind_map:
|
|
def __wrapper(*args, **kwargs): # pylint: disable=E0102
|
|
return self.list_plugins(name, *args, **kwargs)
|
|
return __wrapper
|
|
raise NotFoundError(error_msg.format(name))
|
|
if name.startswith('has_'):
|
|
name = name.replace('has_', '', 1)
|
|
if name in self.kind_map:
|
|
def __wrapper(pname, *args, **kwargs): # pylint: disable=E0102
|
|
return self.has_plugin(pname, name, *args, **kwargs)
|
|
return __wrapper
|
|
raise NotFoundError(error_msg.format(name))
|
|
raise AttributeError(name)
|
|
|
|
def _discover_from_packages(self, packages):
|
|
self.logger.debug('Discovering plugins in packages')
|
|
try:
|
|
for package in packages:
|
|
for module in walk_modules(package):
|
|
self._discover_in_module(module)
|
|
except HostError as e:
|
|
message = 'Problem loading plugins from {}: {}'
|
|
raise PluginLoaderError(message.format(e.module, str(e.orig_exc)),
|
|
e.exc_info)
|
|
|
|
def _discover_from_paths(self, paths, ignore_paths):
|
|
paths = paths or []
|
|
ignore_paths = ignore_paths or []
|
|
|
|
self.logger.debug('Discovering plugins in paths')
|
|
for path in paths:
|
|
self.logger.debug('Checking path %s', path)
|
|
if os.path.isfile(path):
|
|
self._discover_from_file(path)
|
|
for root, _, files in os.walk(path, followlinks=True):
|
|
should_skip = False
|
|
for igpath in ignore_paths:
|
|
if root.startswith(igpath):
|
|
should_skip = True
|
|
break
|
|
if should_skip:
|
|
continue
|
|
for fname in files:
|
|
if os.path.splitext(fname)[1].lower() != '.py':
|
|
continue
|
|
filepath = os.path.join(root, fname)
|
|
self._discover_from_file(filepath)
|
|
|
|
def _discover_from_file(self, filepath):
|
|
try:
|
|
modname = os.path.splitext(filepath[1:])[0].translate(MODNAME_TRANS)
|
|
module = imp.load_source(modname, filepath)
|
|
self._discover_in_module(module)
|
|
except (SystemExit, ImportError), e:
|
|
if self.keep_going:
|
|
self.logger.warning('Failed to load {}'.format(filepath))
|
|
self.logger.warning('Got: {}'.format(e))
|
|
else:
|
|
msg = 'Failed to load {}'
|
|
raise PluginLoaderError(msg.format(filepath), sys.exc_info())
|
|
except Exception as e:
|
|
message = 'Problem loading plugins from {}: {}'
|
|
raise PluginLoaderError(message.format(filepath, e))
|
|
|
|
def _discover_in_module(self, module): # NOQA pylint: disable=too-many-branches
|
|
self.logger.debug('Checking module %s', module.__name__)
|
|
with log.indentcontext():
|
|
for obj in vars(module).itervalues():
|
|
if inspect.isclass(obj):
|
|
if not issubclass(obj, Plugin):
|
|
continue
|
|
if obj.__module__ != module.__name__:
|
|
continue
|
|
if not obj.kind:
|
|
message = 'Skipping plugin {} as it does not define a kind'
|
|
self.logger.debug(message.format(obj.__name__))
|
|
continue
|
|
if not obj.name:
|
|
message = 'Skipping {} {} as it does not define a name'
|
|
self.logger.debug(message.format(obj.kind, obj.__name__))
|
|
continue
|
|
try:
|
|
self._add_found_plugin(obj)
|
|
except PluginLoaderError as e:
|
|
if self.keep_going:
|
|
self.logger.warning(e)
|
|
else:
|
|
raise e
|
|
|
|
def _add_found_plugin(self, obj):
|
|
"""
|
|
:obj: Found plugin class
|
|
:ext: matching plugin item.
|
|
"""
|
|
self.logger.debug('Adding %s %s', obj.kind, obj.name)
|
|
key = identifier(obj.name.lower())
|
|
if key in self.plugins or key in self.aliases:
|
|
msg = '{} "{}" already exists.'
|
|
raise PluginLoaderError(msg.format(obj.kind, obj.name))
|
|
# plugins are tracked both, in a common plugins
|
|
# dict, and in per-plugin kind dict (as retrieving
|
|
# plugins by kind is a common use case.
|
|
self.plugins[key] = obj
|
|
self.kind_map[obj.kind][key] = obj
|
|
|
|
for alias in obj.aliases:
|
|
alias_id = identifier(alias.name.lower())
|
|
if alias_id in self.plugins or alias_id in self.aliases:
|
|
msg = '{} "{}" already exists.'
|
|
raise PluginLoaderError(msg.format(obj.kind, obj.name))
|
|
self.aliases[alias_id] = alias
|