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Fix wscript not being able to create symlinks on Windows 10 with Developer Mode enabled when Python 3 is used.

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Daan De Meyer 2018-02-05 19:57:50 +01:00 committed by Jacob Dufault
parent 1a82f1f113
commit a3c374d368
1 changed files with 24 additions and 26 deletions
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50
wscript
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@ -37,32 +37,30 @@ elif sys.platform == 'win32':
from waflib.Tools.compiler_cxx import cxx_compiler
cxx_compiler['linux'] = ['clang++', 'g++']
if sys.version_info < (3, 0):
if sys.platform == 'win32':
kdll = ctypes.windll.kernel32
def symlink(source, link_name, target_is_directory=False):
# SYMBOLIC_LINK_FLAG_DIRECTORY: 0x1
SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE = 0x2
flags = int(target_is_directory)
ret = kdll.CreateSymbolicLinkA(link_name, source, flags)
if ret == 0:
err = ctypes.WinError()
ERROR_PRIVILEGE_NOT_HELD = 1314
# Creating symbolic link on Windows requires a special priviledge SeCreateSymboliclinkPrivilege,
# which an non-elevated process lacks. Starting with Windows 10 build 14972, this got relaxed
# when Developer Mode is enabled. Triggering this new behaviour requires a new flag. Try again.
if err[0] == ERROR_PRIVILEGE_NOT_HELD:
flags |= SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE
ret = kdll.CreateSymbolicLinkA(link_name, source, flags)
if ret != 0:
return
err = ctypes.WinError()
raise err
else:
# Python 3 compatibility
real_symlink = os.symlink
def symlink(source, link_name, target_is_directory=False):
return real_symlink(source, link_name)
# Creating symbolic link on Windows requires a special priviledge SeCreateSymboliclinkPrivilege,
# which an non-elevated process lacks. Starting with Windows 10 build 14972, this got relaxed
# when Developer Mode is enabled. Triggering this new behaviour requires a new flag.
SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE = 0x2
# Python 2 has no symlink function and Python 3's symlink function does not allow creation of
# symlinks without admin rights (even when Developer Mode is enabled) so we define our own
# symlink function when on Windows.
if sys.platform == 'win32':
kdll = ctypes.windll.kernel32
def symlink(source, link_name, target_is_directory=False):
# SYMBOLIC_LINK_FLAG_DIRECTORY: 0x1
flags = int(target_is_directory) | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE
# Use unicode version (W suffix) of Windows symbolic link function and convert strings to
# unicode if Python 2 is used (strings are unicode by default in Python 3).
if sys.version_info < (3, 0):
ret = kdll.CreateSymbolicLinkW(unicode(link_name), unicode(source), flags)
else:
ret = kdll.CreateSymbolicLinkW(link_name, source, flags)
if ret == 0:
err = ctypes.WinError()
raise err
os.symlink = symlink
# There is a null pointer dereference issue in tools/libclang/CXIndexDataConsumer.cpp handleReference.