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import os
from itertools import chain
from typing import Iterable
import glob
import sys
import sysconfig
import ctypes.util
from AnyQt.QtCore import QLibraryInfo, QT_VERSION
def shlib_ext():
"""
Return possible platform shared library extension.
"""
extensions = []
if sys.platform == "win32":
extensions += [".dll"]
elif sys.platform == "darwin":
extensions += ["", ".dylib"]
else:
extensions += [".so"]
confv = sysconfig.get_config_vars()
so_ext = confv.get("SO", None)
if so_ext is not None and so_ext not in extensions:
extensions += [so_ext]
return extensions
#
# NOTE: posix dlsym resolves references over linked libs
# `LoadLibrary(QtGui.__file__)` is sufficient. Windows?
# No. Only referenced lib is searched (LoadLibrary and GetProcAddress).
# But LoadLibrary("Qt5Gui.dll") might just do the trick.
#
def find_library(name, path) -> Iterable[str]:
if sys.platform == "darwin":
test = [
name,
name + ".so",
name + ".dylib"
"{name}.framework/{name}".format(name=name),
"{name}.framework/Versions/Current/{name}".format(name=name),
"{name}.framework/Versions/*/{name}".format(name=name),
]
elif sys.platform == "win32":
test = [name, name + ".dll"]
else:
test = [
name,
name + ".so",
"lib{name}.so".format(name=name),
"lib{name}.so.*".format(name=name)
]
for suffix in test:
yield from glob.iglob(os.path.join(path, suffix))
# try:
# return next(glob.iglob(os.path.join(path, suffix)))
# except StopIteration:
# pass
def find_qtlib(name) -> Iterable[str]:
qtlibpath = QLibraryInfo.path(QLibraryInfo.LibrariesPath)
major_version = (QT_VERSION >> 16)
paths = find_library(name, qtlibpath)
if name.startswith("Qt"):
# common case for Qt builds on windows
name_extra = "Qt{}{}".format(major_version, name[2:])
extra = find_library(name_extra, qtlibpath)
else:
extra = []
return chain(paths, extra, (name, *((name_extra,) if extra else ())))
def load_qtlib(name):
for path in find_qtlib(name):
try:
return ctypes.cdll.LoadLibrary(path)
except OSError:
pass
return None
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