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Merge pull request #913 from willmerae/issue-906-minimal

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master.ParentEnumerationMethod: Require matching pkg.__name__
pull/918/head
Alex Willmer 3 years ago committed by GitHub
parent 5b505f524a d2ca8a9423
commit 7c4982ebee
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 137 additions and 40 deletions
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16
docs/changelog.rst
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@ -18,8 +18,20 @@ To avail of fixes in an unreleased version, please download a ZIP file
`directly from GitHub <https://github.com/dw/mitogen/>`_.
v0.3.1.dev0 (unreleased)
------------------------
v0.3.3.dev0
-------------------
* :gh:issue:`906` Support packages dynamically inserted into sys.modules, e.g. `distro` >= 1.7.0 as `ansible.module_utils.distro`.
v0.3.2 (2022-01-12)
-------------------
* :gh:issue:`891` Correct `Framework :: Ansible` Trove classifier
v0.3.1 (unreleased)
-------------------
* :gh:issue:`874` Support for Ansible 5 (ansible-core 2.12)
* :gh:issue:`774` Fix bootstrap failures on macOS 11.x and 12.x, involving Python 2.7 wrapper

2
mitogen/__init__.py
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@ -35,7 +35,7 @@ be expected. On the slave, it is built dynamically during startup.
#: Library version as a tuple.
__version__ = (0, 3, 1, 'dev0')
__version__ = (0, 3, 3, 'dev0')
#: This is :data:`False` in slave contexts. Previously it was used to prevent

16
mitogen/core.py
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@ -1357,6 +1357,16 @@ class Importer(object):
fp.close()
def find_module(self, fullname, path=None):
"""
Return a loader (ourself) or None, for the module with fullname.
Implements importlib.abc.MetaPathFinder.find_module().
Deprecrated in Python 3.4+, replaced by find_spec().
Raises ImportWarning in Python 3.10+.
fullname A (fully qualified?) module name, e.g. "os.path".
path __path__ of parent packge. None for a top level module.
"""
if hasattr(_tls, 'running'):
return None
@ -1478,6 +1488,12 @@ class Importer(object):
callback()
def load_module(self, fullname):
"""
Return the loaded module specified by fullname.
Implements importlib.abc.Loader.load_module().
Deprecated in Python 3.4+, replaced by create_module() & exec_module().
"""
fullname = to_text(fullname)
_v and self._log.debug('requesting %s', fullname)
self._refuse_imports(fullname)

141
mitogen/master.py
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@ -122,6 +122,13 @@ def is_stdlib_name(modname):
"""
Return :data:`True` if `modname` appears to come from the standard library.
"""
# `imp.is_builtin()` isn't a documented as part of Python's stdlib API.
#
# """
# Main is a little special - imp.is_builtin("__main__") will return False,
# but BuiltinImporter is still the most appropriate initial setting for
# its __loader__ attribute.
# """ -- comment in CPython pylifecycle.c:add_main_module()
if imp.is_builtin(modname) != 0:
return True
@ -512,42 +519,57 @@ class PkgutilMethod(FinderMethod):
Find `fullname` using :func:`pkgutil.find_loader`.
"""
try:
# If fullname refers to a submodule that's not already imported
# then the containing package is imported.
# Pre-'import spec' this returned None, in Python3.6 it raises
# ImportError.
loader = pkgutil.find_loader(fullname)
except ImportError:
e = sys.exc_info()[1]
LOG.debug('%r._get_module_via_pkgutil(%r): %s',
self, fullname, e)
LOG.debug('%r: find_loader(%r) failed: %s', self, fullname, e)
return None
IOLOG.debug('%r._get_module_via_pkgutil(%r) -> %r',
self, fullname, loader)
if not loader:
LOG.debug('%r: find_loader(%r) returned %r, aborting',
self, fullname, loader)
return
try:
path, is_special = _py_filename(loader.get_filename(fullname))
source = loader.get_source(fullname)
is_pkg = loader.is_package(fullname)
# workaround for special python modules that might only exist in memory
if is_special and is_pkg and not source:
source = '\n'
path = loader.get_filename(fullname)
except (AttributeError, ImportError):
# - Per PEP-302, get_source() and is_package() are optional,
# calling them may throw AttributeError.
# - get_filename() may throw ImportError if pkgutil.find_loader()
# picks a "parent" package's loader for some crap that's been
# stuffed in sys.modules, for example in the case of urllib3:
# "loader for urllib3.contrib.pyopenssl cannot handle
# requests.packages.urllib3.contrib.pyopenssl"
e = sys.exc_info()[1]
LOG.debug('%r: loading %r using %r failed: %s',
self, fullname, loader, e)
LOG.debug('%r: %r.get_file_name(%r) failed: %r', self, loader, fullname, e)
return
path, is_special = _py_filename(path)
try:
source = loader.get_source(fullname)
except AttributeError:
# Per PEP-302, get_source() is optional,
e = sys.exc_info()[1]
LOG.debug('%r: %r.get_source() failed: %r', self, loader, fullname, e)
return
try:
is_pkg = loader.is_package(fullname)
except AttributeError:
# Per PEP-302, is_package() is optional,
e = sys.exc_info()[1]
LOG.debug('%r: %r.is_package(%r) failed: %r', self, loader, fullname, e)
return
# workaround for special python modules that might only exist in memory
if is_special and is_pkg and not source:
source = '\n'
if path is None or source is None:
LOG.debug('%r: path=%r, source=%r, aborting', self, path, source)
return
if isinstance(source, mitogen.core.UnicodeType):
@ -567,23 +589,37 @@ class SysModulesMethod(FinderMethod):
"""
Find `fullname` using its :data:`__file__` attribute.
"""
module = sys.modules.get(fullname)
try:
module = sys.modules[fullname]
except KeyError:
LOG.debug('%r: sys.modules[%r] absent, aborting', self, fullname)
return
if not isinstance(module, types.ModuleType):
LOG.debug('%r: sys.modules[%r] absent or not a regular module',
self, fullname)
LOG.debug('%r: sys.modules[%r] is %r, aborting',
self, fullname, module)
return
try:
resolved_name = module.__name__
except AttributeError:
LOG.debug('%r: %r has no __name__, aborting', self, module)
return
LOG.debug('_get_module_via_sys_modules(%r) -> %r', fullname, module)
alleged_name = getattr(module, '__name__', None)
if alleged_name != fullname:
LOG.debug('sys.modules[%r].__name__ is incorrect, assuming '
'this is a hacky module alias and ignoring it. '
'Got %r, module object: %r',
fullname, alleged_name, module)
if resolved_name != fullname:
LOG.debug('%r: %r.__name__ is %r, aborting',
self, module, resolved_name)
return
path, _ = _py_filename(getattr(module, '__file__', ''))
try:
path = module.__file__
except AttributeError:
LOG.debug('%r: %r has no __file__, aborting', self, module)
return
path, _ = _py_filename(path)
if not path:
LOG.debug('%r: %r.__file__ is %r, aborting', self, module, path)
return
LOG.debug('%r: sys.modules[%r]: found %s', self, fullname, path)
@ -628,10 +664,24 @@ class ParentEnumerationMethod(FinderMethod):
module object or any parent package's :data:`__path__`, since they have all
been overwritten. Some men just want to watch the world burn.
"""
@staticmethod
def _iter_parents(fullname):
"""
>>> list(ParentEnumerationMethod._iter_parents('a'))
[('', 'a')]
>>> list(ParentEnumerationMethod._iter_parents('a.b.c'))
[('a.b', 'c'), ('a', 'b'), ('', 'a')]
"""
while fullname:
fullname, _, modname = str_rpartition(fullname, u'.')
yield fullname, modname
def _find_sane_parent(self, fullname):
"""
Iteratively search :data:`sys.modules` for the least indirect parent of
`fullname` that is loaded and contains a :data:`__path__` attribute.
`fullname` that's from the same package and has a :data:`__path__`
attribute.
:return:
`(parent_name, path, modpath)` tuple, where:
@ -644,21 +694,40 @@ class ParentEnumerationMethod(FinderMethod):
* `modpath`: list of module name components leading from `path`
to the target module.
"""
path = None
modpath = []
while True:
pkgname, _, modname = str_rpartition(to_text(fullname), u'.')
for pkgname, modname in self._iter_parents(fullname):
modpath.insert(0, modname)
if not pkgname:
return [], None, modpath
pkg = sys.modules.get(pkgname)
path = getattr(pkg, '__path__', None)
if pkg and path:
return pkgname.split('.'), path, modpath
try:
pkg = sys.modules[pkgname]
except KeyError:
LOG.debug('%r: sys.modules[%r] absent, skipping', self, pkgname)
continue
try:
resolved_pkgname = pkg.__name__
except AttributeError:
LOG.debug('%r: %r has no __name__, skipping', self, pkg)
continue
LOG.debug('%r: %r lacks __path__ attribute', self, pkgname)
fullname = pkgname
if resolved_pkgname != pkgname:
LOG.debug('%r: %r.__name__ is %r, skipping',
self, pkg, resolved_pkgname)
continue
try:
path = pkg.__path__
except AttributeError:
LOG.debug('%r: %r has no __path__, skipping', self, pkg)
continue
if not path:
LOG.debug('%r: %r.__path__ is %r, skipping', self, pkg, path)
continue
return pkgname.split('.'), path, modpath
def _found_package(self, fullname, path):
path = os.path.join(path, '__init__.py')

2
setup.py
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@ -64,7 +64,7 @@ setup(
zip_safe = False,
classifiers = [
'Environment :: Console',
'Frameworks :: Ansible',
'Framework :: Ansible',
'Intended Audience :: System Administrators',
'License :: OSI Approved :: BSD License',
'Operating System :: MacOS :: MacOS X',

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