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"""Astroid hooks for the Python 2 GObject introspection bindings.
Helps with understanding everything imported from 'gi.repository'
"""
import inspect
import itertools
import sys
import re
import warnings
from astroid import MANAGER, AstroidBuildingException, nodes
from astroid.builder import AstroidBuilder
_inspected_modules = {}
_identifier_re = r'^[A-Za-z_]\w*$'
def _gi_build_stub(parent):
"""
Inspect the passed module recursively and build stubs for functions,
classes, etc.
"""
classes = {}
functions = {}
constants = {}
methods = {}
for name in dir(parent):
if name.startswith("__"):
continue
# Check if this is a valid name in python
if not re.match(_identifier_re, name):
continue
try:
obj = getattr(parent, name)
except:
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 isinstance(obj, (int, str)):
constants[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 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 += "# %s contants\n\n" % parent.__name__
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 += "%s = %s\n" % (name, strval)
if ret:
ret += "\n\n"
if functions:
ret += "# %s functions\n\n" % parent.__name__
for name in sorted(functions):
ret += "def %s(*args, **kwargs):\n" % name
ret += " pass\n"
if ret:
ret += "\n\n"
if methods:
ret += "# %s methods\n\n" % parent.__name__
for name in sorted(methods):
ret += "def %s(self, *args, **kwargs):\n" % name
ret += " pass\n"
if ret:
ret += "\n\n"
if classes:
ret += "# %s classes\n\n" % parent.__name__
for name in sorted(classes):
ret += "class %s(object):\n" % name
classret = _gi_build_stub(classes[name])
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 AstroidBuildingException()
# 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:
__import__(m)
with warnings.catch_warnings():
# Just inspecting the code can raise gi deprecation
# warnings, so ignore them.
try:
from gi import PyGIDeprecationWarning
warnings.simplefilter("ignore", PyGIDeprecationWarning)
except Exception:
pass
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(MANAGER).string_build(modcode, modname)
_inspected_modules[modname] = astng
else:
astng = _inspected_modules[modname]
if astng is None:
raise AstroidBuildingException('Failed to import module %r' % modname)
return astng
def _looks_like_require_version(node):
# 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:
pass
return node
MANAGER.register_failed_import_hook(_import_gi_module)
MANAGER.register_transform(nodes.Call, _register_require_version, _looks_like_require_version)
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