#-----------------------------------------------------------------------------
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# Copyright (c) 2013-2020, PyInstaller Development Team.
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#
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# This file is distributed under the terms of the Apache License 2.0
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#
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# The full license is available in LICENSE, distributed with
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# this software.
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#
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# SPDX-License-Identifier: Apache-2.0
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#-----------------------------------------------------------------------------
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import ctypes
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import glob
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import os
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import sys
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# Pyusb changed these libusb module names in commit 2082e7.
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try:
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import usb.backend.libusb10 as libusb10
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except ImportError:
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import usb.backend.libusb1 as libusb10
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try:
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import usb.backend.libusb01 as libusb01
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except ImportError:
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import usb.backend.libusb0 as libusb01
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import usb.backend.openusb as openusb
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def get_load_func(type, candidates):
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def _load_library(find_library=None):
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exec_path = sys._MEIPASS
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library = None
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for candidate in candidates:
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# Find a list of library files that match 'candidate'.
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if find_library:
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# Caller provides a function that lookup lib path by candidate name.
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lib_path = find_library(candidate)
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libs = [lib_path] if lib_path else []
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else:
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# No find_library callback function, we look at the default location.
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if os.name == 'posix' and sys.platform == 'darwin':
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libs = glob.glob("%s/%s*.dylib*" % (exec_path, candidate))
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elif sys.platform == 'win32' or sys.platform == 'cygwin':
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libs = glob.glob("%s\\%s*.dll" % (exec_path, candidate))
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else:
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libs = glob.glob("%s/%s*.so*" % (exec_path, candidate))
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# Do linker's path lookup work to force load bundled copy.
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for libname in libs:
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try:
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# NOTE: libusb01 is using CDLL under win32.
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# (see usb.backends.libusb01)
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if sys.platform == 'win32' and type != 'libusb01':
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library = ctypes.WinDLL(libname)
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else:
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library = ctypes.CDLL(libname)
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if library is not None:
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break
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except OSError:
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library = None
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if library is not None:
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break
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else:
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raise OSError('USB library could not be found')
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if type == 'libusb10':
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if not hasattr(library, 'libusb_init'):
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raise OSError('USB library could not be found')
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return library
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return _load_library
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# NOTE: Need to keep in sync with future PyUSB updates.
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if sys.platform == 'cygwin':
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libusb10._load_library = get_load_func('libusb10', ('cygusb-1.0', ))
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libusb01._load_library = get_load_func('libusb01', ('cygusb0', ))
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openusb._load_library = get_load_func('openusb', ('openusb', ))
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else:
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libusb10._load_library = get_load_func('libusb10', ('usb-1.0', 'libusb-1.0', 'usb'))
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libusb01._load_library = get_load_func('libusb01', ('usb-0.1', 'usb', 'libusb0', 'libusb'))
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openusb._load_library = get_load_func('openusb', ('openusb', ))
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