diff options
Diffstat (limited to 'src/setuptools_scm/win_py31_compat.py')
| -rw-r--r-- | src/setuptools_scm/win_py31_compat.py | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/src/setuptools_scm/win_py31_compat.py b/src/setuptools_scm/win_py31_compat.py deleted file mode 100644 index 82a11eb..0000000 --- a/src/setuptools_scm/win_py31_compat.py +++ /dev/null @@ -1,214 +0,0 @@ -""" -Backport of os.path.samefile for Python prior to 3.2 -on Windows from jaraco.windows 3.8. - -DON'T EDIT THIS FILE! - -Instead, file tickets and PR's with `jaraco.windows -<https://github.com/jaraco/jaraco.windows>`_ and request -a port to setuptools_scm. -""" - -import os -import nt -import posixpath -import ctypes.wintypes -import sys -import __builtin__ as builtins - - -## -# From jaraco.windows.error - -def format_system_message(errno): - """ - Call FormatMessage with a system error number to retrieve - the descriptive error message. - """ - # first some flags used by FormatMessageW - ALLOCATE_BUFFER = 0x100 - FROM_SYSTEM = 0x1000 - - # Let FormatMessageW allocate the buffer (we'll free it below) - # Also, let it know we want a system error message. - flags = ALLOCATE_BUFFER | FROM_SYSTEM - source = None - message_id = errno - language_id = 0 - result_buffer = ctypes.wintypes.LPWSTR() - buffer_size = 0 - arguments = None - bytes = ctypes.windll.kernel32.FormatMessageW( - flags, - source, - message_id, - language_id, - ctypes.byref(result_buffer), - buffer_size, - arguments, - ) - # note the following will cause an infinite loop if GetLastError - # repeatedly returns an error that cannot be formatted, although - # this should not happen. - handle_nonzero_success(bytes) - message = result_buffer.value - ctypes.windll.kernel32.LocalFree(result_buffer) - return message - - -class WindowsError(builtins.WindowsError): - """ - More info about errors at - http://msdn.microsoft.com/en-us/library/ms681381(VS.85).aspx - """ - - def __init__(self, value=None): - if value is None: - value = ctypes.windll.kernel32.GetLastError() - strerror = format_system_message(value) - if sys.version_info > (3, 3): - args = 0, strerror, None, value - else: - args = value, strerror - super(WindowsError, self).__init__(*args) - - @property - def message(self): - return self.strerror - - @property - def code(self): - return self.winerror - - def __str__(self): - return self.message - - def __repr__(self): - return '{self.__class__.__name__}({self.winerror})'.format(**vars()) - - -def handle_nonzero_success(result): - if result == 0: - raise WindowsError() - - -## -# From jaraco.windows.api.filesystem - -FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000 -FILE_FLAG_BACKUP_SEMANTICS = 0x2000000 -OPEN_EXISTING = 3 -FILE_ATTRIBUTE_NORMAL = 0x80 -FILE_READ_ATTRIBUTES = 0x80 -INVALID_HANDLE_VALUE = ctypes.wintypes.HANDLE(-1).value - - -class BY_HANDLE_FILE_INFORMATION(ctypes.Structure): - _fields_ = [ - ('file_attributes', ctypes.wintypes.DWORD), - ('creation_time', ctypes.wintypes.FILETIME), - ('last_access_time', ctypes.wintypes.FILETIME), - ('last_write_time', ctypes.wintypes.FILETIME), - ('volume_serial_number', ctypes.wintypes.DWORD), - ('file_size_high', ctypes.wintypes.DWORD), - ('file_size_low', ctypes.wintypes.DWORD), - ('number_of_links', ctypes.wintypes.DWORD), - ('file_index_high', ctypes.wintypes.DWORD), - ('file_index_low', ctypes.wintypes.DWORD), - ] - - @property - def file_size(self): - return (self.file_size_high << 32) + self.file_size_low - - @property - def file_index(self): - return (self.file_index_high << 32) + self.file_index_low - - -class SECURITY_ATTRIBUTES(ctypes.Structure): - _fields_ = ( - ('length', ctypes.wintypes.DWORD), - ('p_security_descriptor', ctypes.wintypes.LPVOID), - ('inherit_handle', ctypes.wintypes.BOOLEAN), - ) - - -LPSECURITY_ATTRIBUTES = ctypes.POINTER(SECURITY_ATTRIBUTES) - - -CreateFile = ctypes.windll.kernel32.CreateFileW -CreateFile.argtypes = ( - ctypes.wintypes.LPWSTR, - ctypes.wintypes.DWORD, - ctypes.wintypes.DWORD, - LPSECURITY_ATTRIBUTES, - ctypes.wintypes.DWORD, - ctypes.wintypes.DWORD, - ctypes.wintypes.HANDLE, -) -CreateFile.restype = ctypes.wintypes.HANDLE - -GetFileInformationByHandle = ctypes.windll.kernel32.GetFileInformationByHandle -GetFileInformationByHandle.restype = ctypes.wintypes.BOOL -GetFileInformationByHandle.argtypes = ( - ctypes.wintypes.HANDLE, - ctypes.POINTER(BY_HANDLE_FILE_INFORMATION), -) - - -## -# From jaraco.windows.filesystem - -def compat_stat(path): - """ - Generate stat as found on Python 3.2 and later. - """ - stat = os.stat(path) - info = get_file_info(path) - # rewrite st_ino, st_dev, and st_nlink based on file info - return nt.stat_result( - (stat.st_mode,) + - (info.file_index, info.volume_serial_number, info.number_of_links) + - stat[4:] - ) - - -def samefile(f1, f2): - """ - Backport of samefile from Python 3.2 with support for Windows. - """ - return posixpath.samestat(compat_stat(f1), compat_stat(f2)) - - -def get_file_info(path): - # open the file the same way CPython does in posixmodule.c - desired_access = FILE_READ_ATTRIBUTES - share_mode = 0 - security_attributes = None - creation_disposition = OPEN_EXISTING - flags_and_attributes = ( - FILE_ATTRIBUTE_NORMAL | - FILE_FLAG_BACKUP_SEMANTICS | - FILE_FLAG_OPEN_REPARSE_POINT - ) - template_file = None - - handle = CreateFile( - path, - desired_access, - share_mode, - security_attributes, - creation_disposition, - flags_and_attributes, - template_file, - ) - - if handle == INVALID_HANDLE_VALUE: - raise WindowsError() - - info = BY_HANDLE_FILE_INFORMATION() - res = GetFileInformationByHandle(handle, info) - handle_nonzero_success(res) - - return info |