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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/astroid/blob/main/CONTRIBUTORS.txt
"""Astroid hooks for the Python 2 GObject introspection bindings.
Helps with understanding everything imported from 'gi.repository'
"""
# pylint:disable=import-error,import-outside-toplevel
import inspect
import itertools
import re
import sys
import warnings
from astroid import nodes
from astroid.builder import AstroidBuilder
from astroid.exceptions import AstroidBuildingError
from astroid.manager import AstroidManager
_inspected_modules = {}
_identifier_re = r"^[A-Za-z_]\w*$"
_special_methods = frozenset(
{
"__lt__",
"__le__",
"__eq__",
"__ne__",
"__ge__",
"__gt__",
"__iter__",
"__getitem__",
"__setitem__",
"__delitem__",
"__len__",
"__bool__",
"__nonzero__",
"__next__",
"__str__",
"__contains__",
"__enter__",
"__exit__",
"__repr__",
"__getattr__",
"__setattr__",
"__delattr__",
"__del__",
"__hash__",
}
)
def _gi_build_stub(parent): # noqa: C901
"""
Inspect the passed module recursively and build stubs for functions,
classes, etc.
"""
classes = {}
functions = {}
constants = {}
methods = {}
for name in dir(parent):
if name.startswith("__") and name not in _special_methods:
continue
# Check if this is a valid name in python
if not re.match(_identifier_re, name):
continue
try:
obj = getattr(parent, name)
except Exception: # pylint: disable=broad-except
# gi.module.IntrospectionModule.__getattr__() can raise all kinds of things
# like ValueError, TypeError, NotImplementedError, RepositoryError, etc
continue
if inspect.isclass(obj):
classes[name] = obj
elif inspect.isfunction(obj) or inspect.isbuiltin(obj):
functions[name] = obj
elif inspect.ismethod(obj) or inspect.ismethoddescriptor(obj):
methods[name] = obj
elif (
str(obj).startswith("<flags")
or str(obj).startswith("<enum ")
or str(obj).startswith("<GType ")
or inspect.isdatadescriptor(obj)
):
constants[name] = 0
elif isinstance(obj, (int, str)):
constants[name] = obj
elif callable(obj):
# Fall back to a function for anything callable
functions[name] = obj
else:
# Assume everything else is some manner of constant
constants[name] = 0
ret = ""
if constants:
ret += f"# {parent.__name__} constants\n\n"
for name in sorted(constants):
if name[0].isdigit():
# GDK has some busted constant names like
# Gdk.EventType.2BUTTON_PRESS
continue
val = constants[name]
strval = str(val)
if isinstance(val, str):
strval = '"%s"' % str(val).replace("\\", "\\\\")
ret += f"{name} = {strval}\n"
if ret:
ret += "\n\n"
if functions:
ret += f"# {parent.__name__} functions\n\n"
for name in sorted(functions):
ret += f"def {name}(*args, **kwargs):\n"
ret += " pass\n"
if ret:
ret += "\n\n"
if methods:
ret += f"# {parent.__name__} methods\n\n"
for name in sorted(methods):
ret += f"def {name}(self, *args, **kwargs):\n"
ret += " pass\n"
if ret:
ret += "\n\n"
if classes:
ret += f"# {parent.__name__} classes\n\n"
for name, obj in sorted(classes.items()):
base = "object"
if issubclass(obj, Exception):
base = "Exception"
ret += f"class {name}({base}):\n"
classret = _gi_build_stub(obj)
if not classret:
classret = "pass\n"
for line in classret.splitlines():
ret += " " + line + "\n"
ret += "\n"
return ret
def _import_gi_module(modname):
# we only consider gi.repository submodules
if not modname.startswith("gi.repository."):
raise AstroidBuildingError(modname=modname)
# build astroid representation unless we already tried so
if modname not in _inspected_modules:
modnames = [modname]
optional_modnames = []
# GLib and GObject may have some special case handling
# in pygobject that we need to cope with. However at
# least as of pygobject3-3.13.91 the _glib module doesn't
# exist anymore, so if treat these modules as optional.
if modname == "gi.repository.GLib":
optional_modnames.append("gi._glib")
elif modname == "gi.repository.GObject":
optional_modnames.append("gi._gobject")
try:
modcode = ""
for m in itertools.chain(modnames, optional_modnames):
try:
with warnings.catch_warnings():
# Just inspecting the code can raise gi deprecation
# warnings, so ignore them.
try:
from gi import ( # pylint:disable=import-error
PyGIDeprecationWarning,
PyGIWarning,
)
warnings.simplefilter("ignore", PyGIDeprecationWarning)
warnings.simplefilter("ignore", PyGIWarning)
except Exception: # pylint:disable=broad-except
pass
__import__(m)
modcode += _gi_build_stub(sys.modules[m])
except ImportError:
if m not in optional_modnames:
raise
except ImportError:
astng = _inspected_modules[modname] = None
else:
astng = AstroidBuilder(AstroidManager()).string_build(modcode, modname)
_inspected_modules[modname] = astng
else:
astng = _inspected_modules[modname]
if astng is None:
raise AstroidBuildingError(modname=modname)
return astng
def _looks_like_require_version(node) -> bool:
# Return whether this looks like a call to gi.require_version(<name>, <version>)
# Only accept function calls with two constant arguments
if len(node.args) != 2:
return False
if not all(isinstance(arg, nodes.Const) for arg in node.args):
return False
func = node.func
if isinstance(func, nodes.Attribute):
if func.attrname != "require_version":
return False
if isinstance(func.expr, nodes.Name) and func.expr.name == "gi":
return True
return False
if isinstance(func, nodes.Name):
return func.name == "require_version"
return False
def _register_require_version(node):
# Load the gi.require_version locally
try:
import gi
gi.require_version(node.args[0].value, node.args[1].value)
except Exception: # pylint:disable=broad-except
pass
return node
AstroidManager().register_failed_import_hook(_import_gi_module)
AstroidManager().register_transform(
nodes.Call, _register_require_version, _looks_like_require_version
)