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Diffstat (limited to 'sphinx/ext/autodoc/importer.py')
| -rw-r--r-- | sphinx/ext/autodoc/importer.py | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/sphinx/ext/autodoc/importer.py b/sphinx/ext/autodoc/importer.py new file mode 100644 index 0000000..977cfbb --- /dev/null +++ b/sphinx/ext/autodoc/importer.py @@ -0,0 +1,301 @@ +"""Importer utilities for autodoc""" + +import importlib +import traceback +import warnings +from typing import TYPE_CHECKING, Any, Callable, Dict, List, NamedTuple, Optional + +from sphinx.ext.autodoc.mock import ismock, undecorate +from sphinx.pycode import ModuleAnalyzer, PycodeError +from sphinx.util import logging +from sphinx.util.inspect import (getannotations, getmro, getslots, isclass, isenumclass, + safe_getattr) + +if TYPE_CHECKING: + from sphinx.ext.autodoc import ObjectMember + +logger = logging.getLogger(__name__) + + +def mangle(subject: Any, name: str) -> str: + """Mangle the given name.""" + try: + if isclass(subject) and name.startswith('__') and not name.endswith('__'): + return "_%s%s" % (subject.__name__, name) + except AttributeError: + pass + + return name + + +def unmangle(subject: Any, name: str) -> Optional[str]: + """Unmangle the given name.""" + try: + if isclass(subject) and not name.endswith('__'): + prefix = "_%s__" % subject.__name__ + if name.startswith(prefix): + return name.replace(prefix, "__", 1) + else: + for cls in subject.__mro__: + prefix = "_%s__" % cls.__name__ + if name.startswith(prefix): + # mangled attribute defined in parent class + return None + except AttributeError: + pass + + return name + + +def import_module(modname: str, warningiserror: bool = False) -> Any: + """ + Call importlib.import_module(modname), convert exceptions to ImportError + """ + try: + with warnings.catch_warnings(): + warnings.filterwarnings("ignore", category=ImportWarning) + with logging.skip_warningiserror(not warningiserror): + return importlib.import_module(modname) + except BaseException as exc: + # Importing modules may cause any side effects, including + # SystemExit, so we need to catch all errors. + raise ImportError(exc, traceback.format_exc()) from exc + + +def import_object(modname: str, objpath: List[str], objtype: str = '', + attrgetter: Callable[[Any, str], Any] = safe_getattr, + warningiserror: bool = False) -> Any: + if objpath: + logger.debug('[autodoc] from %s import %s', modname, '.'.join(objpath)) + else: + logger.debug('[autodoc] import %s', modname) + + try: + module = None + exc_on_importing = None + objpath = list(objpath) + while module is None: + try: + module = import_module(modname, warningiserror=warningiserror) + logger.debug('[autodoc] import %s => %r', modname, module) + except ImportError as exc: + logger.debug('[autodoc] import %s => failed', modname) + exc_on_importing = exc + if '.' in modname: + # retry with parent module + modname, name = modname.rsplit('.', 1) + objpath.insert(0, name) + else: + raise + + obj = module + parent = None + object_name = None + for attrname in objpath: + parent = obj + logger.debug('[autodoc] getattr(_, %r)', attrname) + mangled_name = mangle(obj, attrname) + obj = attrgetter(obj, mangled_name) + + try: + logger.debug('[autodoc] => %r', obj) + except TypeError: + # fallback of failure on logging for broken object + # refs: https://github.com/sphinx-doc/sphinx/issues/9095 + logger.debug('[autodoc] => %r', (obj,)) + + object_name = attrname + return [module, parent, object_name, obj] + except (AttributeError, ImportError) as exc: + if isinstance(exc, AttributeError) and exc_on_importing: + # restore ImportError + exc = exc_on_importing + + if objpath: + errmsg = ('autodoc: failed to import %s %r from module %r' % + (objtype, '.'.join(objpath), modname)) + else: + errmsg = 'autodoc: failed to import %s %r' % (objtype, modname) + + if isinstance(exc, ImportError): + # import_module() raises ImportError having real exception obj and + # traceback + real_exc, traceback_msg = exc.args + if isinstance(real_exc, SystemExit): + errmsg += ('; the module executes module level statement ' + 'and it might call sys.exit().') + elif isinstance(real_exc, ImportError) and real_exc.args: + errmsg += '; the following exception was raised:\n%s' % real_exc.args[0] + else: + errmsg += '; the following exception was raised:\n%s' % traceback_msg + else: + errmsg += '; the following exception was raised:\n%s' % traceback.format_exc() + + logger.debug(errmsg) + raise ImportError(errmsg) from exc + + +class Attribute(NamedTuple): + name: str + directly_defined: bool + value: Any + + +def get_object_members(subject: Any, objpath: List[str], attrgetter: Callable, + analyzer: ModuleAnalyzer = None) -> Dict[str, Attribute]: + """Get members and attributes of target object.""" + from sphinx.ext.autodoc import INSTANCEATTR + + # the members directly defined in the class + obj_dict = attrgetter(subject, '__dict__', {}) + + members: Dict[str, Attribute] = {} + + # enum members + if isenumclass(subject): + for name, value in subject.__members__.items(): + if name not in members: + members[name] = Attribute(name, True, value) + + superclass = subject.__mro__[1] + for name in obj_dict: + if name not in superclass.__dict__: + value = safe_getattr(subject, name) + members[name] = Attribute(name, True, value) + + # members in __slots__ + try: + __slots__ = getslots(subject) + if __slots__: + from sphinx.ext.autodoc import SLOTSATTR + + for name in __slots__: + members[name] = Attribute(name, True, SLOTSATTR) + except (TypeError, ValueError): + pass + + # other members + for name in dir(subject): + try: + value = attrgetter(subject, name) + directly_defined = name in obj_dict + name = unmangle(subject, name) + if name and name not in members: + members[name] = Attribute(name, directly_defined, value) + except AttributeError: + continue + + # annotation only member (ex. attr: int) + for i, cls in enumerate(getmro(subject)): + for name in getannotations(cls): + name = unmangle(cls, name) + if name and name not in members: + members[name] = Attribute(name, i == 0, INSTANCEATTR) + + if analyzer: + # append instance attributes (cf. self.attr1) if analyzer knows + namespace = '.'.join(objpath) + for (ns, name) in analyzer.find_attr_docs(): + if namespace == ns and name not in members: + members[name] = Attribute(name, True, INSTANCEATTR) + + return members + + +def get_class_members(subject: Any, objpath: List[str], attrgetter: Callable, + inherit_docstrings: bool = True) -> Dict[str, "ObjectMember"]: + """Get members and attributes of target class.""" + from sphinx.ext.autodoc import INSTANCEATTR, ObjectMember + + # the members directly defined in the class + obj_dict = attrgetter(subject, '__dict__', {}) + + members: Dict[str, ObjectMember] = {} + + # enum members + if isenumclass(subject): + for name, value in subject.__members__.items(): + if name not in members: + members[name] = ObjectMember(name, value, class_=subject) + + superclass = subject.__mro__[1] + for name in obj_dict: + if name not in superclass.__dict__: + value = safe_getattr(subject, name) + members[name] = ObjectMember(name, value, class_=subject) + + # members in __slots__ + try: + __slots__ = getslots(subject) + if __slots__: + from sphinx.ext.autodoc import SLOTSATTR + + for name, docstring in __slots__.items(): + members[name] = ObjectMember(name, SLOTSATTR, class_=subject, + docstring=docstring) + except (TypeError, ValueError): + pass + + # other members + for name in dir(subject): + try: + value = attrgetter(subject, name) + if ismock(value): + value = undecorate(value) + + unmangled = unmangle(subject, name) + if unmangled and unmangled not in members: + if name in obj_dict: + members[unmangled] = ObjectMember(unmangled, value, class_=subject) + else: + members[unmangled] = ObjectMember(unmangled, value) + except AttributeError: + continue + + try: + for cls in getmro(subject): + try: + modname = safe_getattr(cls, '__module__') + qualname = safe_getattr(cls, '__qualname__') + analyzer = ModuleAnalyzer.for_module(modname) + analyzer.analyze() + except AttributeError: + qualname = None + analyzer = None + except PycodeError: + analyzer = None + + # annotation only member (ex. attr: int) + for name in getannotations(cls): + name = unmangle(cls, name) + if name and name not in members: + if analyzer and (qualname, name) in analyzer.attr_docs: + docstring = '\n'.join(analyzer.attr_docs[qualname, name]) + else: + docstring = None + + members[name] = ObjectMember(name, INSTANCEATTR, class_=cls, + docstring=docstring) + + # append or complete instance attributes (cf. self.attr1) if analyzer knows + if analyzer: + for (ns, name), docstring in analyzer.attr_docs.items(): + if ns == qualname and name not in members: + # otherwise unknown instance attribute + members[name] = ObjectMember(name, INSTANCEATTR, class_=cls, + docstring='\n'.join(docstring)) + elif (ns == qualname and docstring and + isinstance(members[name], ObjectMember) and + not members[name].docstring): + if cls != subject and not inherit_docstrings: + # If we are in the MRO of the class and not the class itself, + # and we do not want to inherit docstrings, then skip setting + # the docstring below + continue + # attribute is already known, because dir(subject) enumerates it. + # But it has no docstring yet + members[name].docstring = '\n'.join(docstring) + except AttributeError: + pass + + return members |