You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
391 lines
15 KiB
Python
391 lines
15 KiB
Python
# copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
|
|
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
|
|
#
|
|
# This file is part of astroid.
|
|
#
|
|
# astroid is free software: you can redistribute it and/or modify it
|
|
# under the terms of the GNU Lesser General Public License as published by the
|
|
# Free Software Foundation, either version 2.1 of the License, or (at your
|
|
# option) any later version.
|
|
#
|
|
# astroid is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
|
|
# for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public License along
|
|
# with astroid. If not, see <http://www.gnu.org/licenses/>.
|
|
"""astroid manager: avoid multiple astroid build of a same module when
|
|
possible by providing a class responsible to get astroid representation
|
|
from various source and using a cache of built modules)
|
|
"""
|
|
from __future__ import print_function
|
|
|
|
__docformat__ = "restructuredtext en"
|
|
|
|
import collections
|
|
import imp
|
|
import os
|
|
from os.path import dirname, join, isdir, exists
|
|
from warnings import warn
|
|
import zipimport
|
|
|
|
from logilab.common.configuration import OptionsProviderMixIn
|
|
|
|
from astroid.exceptions import AstroidBuildingException
|
|
from astroid import modutils
|
|
|
|
|
|
def astroid_wrapper(func, modname):
|
|
"""wrapper to give to AstroidManager.project_from_files"""
|
|
print('parsing %s...' % modname)
|
|
try:
|
|
return func(modname)
|
|
except AstroidBuildingException as exc:
|
|
print(exc)
|
|
except Exception as exc:
|
|
import traceback
|
|
traceback.print_exc()
|
|
|
|
def _silent_no_wrap(func, modname):
|
|
"""silent wrapper that doesn't do anything; can be used for tests"""
|
|
return func(modname)
|
|
|
|
def safe_repr(obj):
|
|
try:
|
|
return repr(obj)
|
|
except:
|
|
return '???'
|
|
|
|
|
|
|
|
class AstroidManager(OptionsProviderMixIn):
|
|
"""the astroid manager, responsible to build astroid from files
|
|
or modules.
|
|
|
|
Use the Borg pattern.
|
|
"""
|
|
|
|
name = 'astroid loader'
|
|
options = (("ignore",
|
|
{'type' : "csv", 'metavar' : "<file>",
|
|
'dest' : "black_list", "default" : ('CVS',),
|
|
'help' : "add <file> (may be a directory) to the black list\
|
|
. It should be a base name, not a path. You may set this option multiple times\
|
|
."}),
|
|
("project",
|
|
{'default': "No Name", 'type' : 'string', 'short': 'p',
|
|
'metavar' : '<project name>',
|
|
'help' : 'set the project name.'}),
|
|
)
|
|
brain = {}
|
|
def __init__(self):
|
|
self.__dict__ = AstroidManager.brain
|
|
if not self.__dict__:
|
|
OptionsProviderMixIn.__init__(self)
|
|
self.load_defaults()
|
|
# NOTE: cache entries are added by the [re]builder
|
|
self.astroid_cache = {}
|
|
self._mod_file_cache = {}
|
|
self.transforms = collections.defaultdict(list)
|
|
self._failed_import_hooks = []
|
|
self.always_load_extensions = False
|
|
self.extension_package_whitelist = set()
|
|
|
|
def ast_from_file(self, filepath, modname=None, fallback=True, source=False):
|
|
"""given a module name, return the astroid object"""
|
|
try:
|
|
filepath = modutils.get_source_file(filepath, include_no_ext=True)
|
|
source = True
|
|
except modutils.NoSourceFile:
|
|
pass
|
|
if modname is None:
|
|
try:
|
|
modname = '.'.join(modutils.modpath_from_file(filepath))
|
|
except ImportError:
|
|
modname = filepath
|
|
if modname in self.astroid_cache and self.astroid_cache[modname].file == filepath:
|
|
return self.astroid_cache[modname]
|
|
if source:
|
|
from astroid.builder import AstroidBuilder
|
|
return AstroidBuilder(self).file_build(filepath, modname)
|
|
elif fallback and modname:
|
|
return self.ast_from_module_name(modname)
|
|
raise AstroidBuildingException('unable to get astroid for file %s' %
|
|
filepath)
|
|
|
|
def _build_stub_module(self, modname):
|
|
from astroid.builder import AstroidBuilder
|
|
return AstroidBuilder(self).string_build('', modname)
|
|
|
|
def _can_load_extension(self, modname):
|
|
if self.always_load_extensions:
|
|
return True
|
|
if modutils.is_standard_module(modname):
|
|
return True
|
|
parts = modname.split('.')
|
|
return any(
|
|
'.'.join(parts[:x]) in self.extension_package_whitelist
|
|
for x in range(1, len(parts) + 1))
|
|
|
|
def ast_from_module_name(self, modname, context_file=None):
|
|
"""given a module name, return the astroid object"""
|
|
if modname in self.astroid_cache:
|
|
return self.astroid_cache[modname]
|
|
if modname == '__main__':
|
|
return self._build_stub_module(modname)
|
|
old_cwd = os.getcwd()
|
|
if context_file:
|
|
os.chdir(dirname(context_file))
|
|
try:
|
|
filepath, mp_type = self.file_from_module_name(modname, context_file)
|
|
if mp_type == modutils.PY_ZIPMODULE:
|
|
module = self.zip_import_data(filepath)
|
|
if module is not None:
|
|
return module
|
|
elif mp_type in (imp.C_BUILTIN, imp.C_EXTENSION):
|
|
if mp_type == imp.C_EXTENSION and not self._can_load_extension(modname):
|
|
return self._build_stub_module(modname)
|
|
try:
|
|
module = modutils.load_module_from_name(modname)
|
|
except Exception as ex:
|
|
msg = 'Unable to load module %s (%s)' % (modname, ex)
|
|
raise AstroidBuildingException(msg)
|
|
return self.ast_from_module(module, modname)
|
|
elif mp_type == imp.PY_COMPILED:
|
|
raise AstroidBuildingException("Unable to load compiled module %s" % (modname,))
|
|
if filepath is None:
|
|
raise AstroidBuildingException("Unable to load module %s" % (modname,))
|
|
return self.ast_from_file(filepath, modname, fallback=False)
|
|
except AstroidBuildingException as e:
|
|
for hook in self._failed_import_hooks:
|
|
try:
|
|
return hook(modname)
|
|
except AstroidBuildingException:
|
|
pass
|
|
raise e
|
|
finally:
|
|
os.chdir(old_cwd)
|
|
|
|
def zip_import_data(self, filepath):
|
|
if zipimport is None:
|
|
return None
|
|
from astroid.builder import AstroidBuilder
|
|
builder = AstroidBuilder(self)
|
|
for ext in ('.zip', '.egg'):
|
|
try:
|
|
eggpath, resource = filepath.rsplit(ext + os.path.sep, 1)
|
|
except ValueError:
|
|
continue
|
|
try:
|
|
importer = zipimport.zipimporter(eggpath + ext)
|
|
zmodname = resource.replace(os.path.sep, '.')
|
|
if importer.is_package(resource):
|
|
zmodname = zmodname + '.__init__'
|
|
module = builder.string_build(importer.get_source(resource),
|
|
zmodname, filepath)
|
|
return module
|
|
except:
|
|
continue
|
|
return None
|
|
|
|
def file_from_module_name(self, modname, contextfile):
|
|
try:
|
|
value = self._mod_file_cache[(modname, contextfile)]
|
|
except KeyError:
|
|
try:
|
|
value = modutils.file_info_from_modpath(
|
|
modname.split('.'), context_file=contextfile)
|
|
except ImportError as ex:
|
|
msg = 'Unable to load module %s (%s)' % (modname, ex)
|
|
value = AstroidBuildingException(msg)
|
|
self._mod_file_cache[(modname, contextfile)] = value
|
|
if isinstance(value, AstroidBuildingException):
|
|
raise value
|
|
return value
|
|
|
|
def ast_from_module(self, module, modname=None):
|
|
"""given an imported module, return the astroid object"""
|
|
modname = modname or module.__name__
|
|
if modname in self.astroid_cache:
|
|
return self.astroid_cache[modname]
|
|
try:
|
|
# some builtin modules don't have __file__ attribute
|
|
filepath = module.__file__
|
|
if modutils.is_python_source(filepath):
|
|
return self.ast_from_file(filepath, modname)
|
|
except AttributeError:
|
|
pass
|
|
from astroid.builder import AstroidBuilder
|
|
return AstroidBuilder(self).module_build(module, modname)
|
|
|
|
def ast_from_class(self, klass, modname=None):
|
|
"""get astroid for the given class"""
|
|
if modname is None:
|
|
try:
|
|
modname = klass.__module__
|
|
except AttributeError:
|
|
raise AstroidBuildingException(
|
|
'Unable to get module for class %s' % safe_repr(klass))
|
|
modastroid = self.ast_from_module_name(modname)
|
|
return modastroid.getattr(klass.__name__)[0] # XXX
|
|
|
|
|
|
def infer_ast_from_something(self, obj, context=None):
|
|
"""infer astroid for the given class"""
|
|
if hasattr(obj, '__class__') and not isinstance(obj, type):
|
|
klass = obj.__class__
|
|
else:
|
|
klass = obj
|
|
try:
|
|
modname = klass.__module__
|
|
except AttributeError:
|
|
raise AstroidBuildingException(
|
|
'Unable to get module for %s' % safe_repr(klass))
|
|
except Exception as ex:
|
|
raise AstroidBuildingException(
|
|
'Unexpected error while retrieving module for %s: %s'
|
|
% (safe_repr(klass), ex))
|
|
try:
|
|
name = klass.__name__
|
|
except AttributeError:
|
|
raise AstroidBuildingException(
|
|
'Unable to get name for %s' % safe_repr(klass))
|
|
except Exception as ex:
|
|
raise AstroidBuildingException(
|
|
'Unexpected error while retrieving name for %s: %s'
|
|
% (safe_repr(klass), ex))
|
|
# take care, on living object __module__ is regularly wrong :(
|
|
modastroid = self.ast_from_module_name(modname)
|
|
if klass is obj:
|
|
for infered in modastroid.igetattr(name, context):
|
|
yield infered
|
|
else:
|
|
for infered in modastroid.igetattr(name, context):
|
|
yield infered.instanciate_class()
|
|
|
|
def project_from_files(self, files, func_wrapper=astroid_wrapper,
|
|
project_name=None, black_list=None):
|
|
"""return a Project from a list of files or modules"""
|
|
# build the project representation
|
|
project_name = project_name or self.config.project
|
|
black_list = black_list or self.config.black_list
|
|
project = Project(project_name)
|
|
for something in files:
|
|
if not exists(something):
|
|
fpath = modutils.file_from_modpath(something.split('.'))
|
|
elif isdir(something):
|
|
fpath = join(something, '__init__.py')
|
|
else:
|
|
fpath = something
|
|
astroid = func_wrapper(self.ast_from_file, fpath)
|
|
if astroid is None:
|
|
continue
|
|
# XXX why is first file defining the project.path ?
|
|
project.path = project.path or astroid.file
|
|
project.add_module(astroid)
|
|
base_name = astroid.name
|
|
# recurse in package except if __init__ was explicitly given
|
|
if astroid.package and something.find('__init__') == -1:
|
|
# recurse on others packages / modules if this is a package
|
|
for fpath in modutils.get_module_files(dirname(astroid.file),
|
|
black_list):
|
|
astroid = func_wrapper(self.ast_from_file, fpath)
|
|
if astroid is None or astroid.name == base_name:
|
|
continue
|
|
project.add_module(astroid)
|
|
return project
|
|
|
|
def register_transform(self, node_class, transform, predicate=None):
|
|
"""Register `transform(node)` function to be applied on the given
|
|
Astroid's `node_class` if `predicate` is None or returns true
|
|
when called with the node as argument.
|
|
|
|
The transform function may return a value which is then used to
|
|
substitute the original node in the tree.
|
|
"""
|
|
self.transforms[node_class].append((transform, predicate))
|
|
|
|
def unregister_transform(self, node_class, transform, predicate=None):
|
|
"""Unregister the given transform."""
|
|
self.transforms[node_class].remove((transform, predicate))
|
|
|
|
def register_failed_import_hook(self, hook):
|
|
"""Registers a hook to resolve imports that cannot be found otherwise.
|
|
|
|
`hook` must be a function that accepts a single argument `modname` which
|
|
contains the name of the module or package that could not be imported.
|
|
If `hook` can resolve the import, must return a node of type `astroid.Module`,
|
|
otherwise, it must raise `AstroidBuildingException`.
|
|
"""
|
|
self._failed_import_hooks.append(hook)
|
|
|
|
def transform(self, node):
|
|
"""Call matching transforms for the given node if any and return the
|
|
transformed node.
|
|
"""
|
|
cls = node.__class__
|
|
if cls not in self.transforms:
|
|
# no transform registered for this class of node
|
|
return node
|
|
|
|
transforms = self.transforms[cls]
|
|
orig_node = node # copy the reference
|
|
for transform_func, predicate in transforms:
|
|
if predicate is None or predicate(node):
|
|
ret = transform_func(node)
|
|
# if the transformation function returns something, it's
|
|
# expected to be a replacement for the node
|
|
if ret is not None:
|
|
if node is not orig_node:
|
|
# node has already be modified by some previous
|
|
# transformation, warn about it
|
|
warn('node %s substituted multiple times' % node)
|
|
node = ret
|
|
return node
|
|
|
|
def cache_module(self, module):
|
|
"""Cache a module if no module with the same name is known yet."""
|
|
self.astroid_cache.setdefault(module.name, module)
|
|
|
|
def clear_cache(self, astroid_builtin=None):
|
|
# XXX clear transforms
|
|
self.astroid_cache.clear()
|
|
# force bootstrap again, else we may ends up with cache inconsistency
|
|
# between the manager and CONST_PROXY, making
|
|
# unittest_lookup.LookupTC.test_builtin_lookup fail depending on the
|
|
# test order
|
|
import astroid.raw_building
|
|
astroid.raw_building._astroid_bootstrapping(
|
|
astroid_builtin=astroid_builtin)
|
|
|
|
|
|
class Project(object):
|
|
"""a project handle a set of modules / packages"""
|
|
def __init__(self, name=''):
|
|
self.name = name
|
|
self.path = None
|
|
self.modules = []
|
|
self.locals = {}
|
|
self.__getitem__ = self.locals.__getitem__
|
|
self.__iter__ = self.locals.__iter__
|
|
self.values = self.locals.values
|
|
self.keys = self.locals.keys
|
|
self.items = self.locals.items
|
|
|
|
def add_module(self, node):
|
|
self.locals[node.name] = node
|
|
self.modules.append(node)
|
|
|
|
def get_module(self, name):
|
|
return self.locals[name]
|
|
|
|
def get_children(self):
|
|
return self.modules
|
|
|
|
def __repr__(self):
|
|
return '<Project %r at %s (%s modules)>' % (self.name, id(self),
|
|
len(self.modules))
|
|
|
|
|