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Resolve verstamp bootstraping problem | Allow GitHub installs (#2349)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| """ | ||
| A pure-python re-implementation of methods used by win32verstamp. | ||
| This is to avoid a bootstraping problem where win32verstamp is used during build, | ||
| but requires an installation of pywin32 to be present. | ||
| We used to work around this by ignoring failure to verstamp, but that's easy to miss. | ||
| Implementations adapted, simplified and typed from: | ||
| - https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/ctypes/_util.py | ||
| - https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/cffi/_resource.py | ||
| - https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/pywin32/win32api.py | ||
| --- | ||
| (C) Copyright 2014 Enthought, Inc., Austin, TX | ||
| All right reserved. | ||
| This file is open source software distributed according to the terms in | ||
| https://github.com/enthought/pywin32-ctypes/blob/main/LICENSE.txt | ||
| """ | ||
|
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| from __future__ import annotations | ||
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| from collections.abc import Iterable | ||
| from ctypes import FormatError, WinDLL, get_last_error | ||
| from ctypes.wintypes import ( | ||
| BOOL, | ||
| DWORD, | ||
| HANDLE, | ||
| LPCWSTR, | ||
| LPVOID, | ||
| WORD, | ||
| ) | ||
| from typing import TYPE_CHECKING | ||
|
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| if TYPE_CHECKING: | ||
| from ctypes import _NamedFuncPointer | ||
|
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| from _typeshed import ReadableBuffer | ||
| from typing_extensions import Literal, SupportsBytes, SupportsIndex | ||
|
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| kernel32 = WinDLL("kernel32", use_last_error=True) | ||
|
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| ### | ||
| # https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/ctypes/_util.py | ||
| ### | ||
|
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| def make_error(function: _NamedFuncPointer) -> OSError: | ||
| code = get_last_error() | ||
| exception = OSError() | ||
| exception.winerror = code | ||
| exception.function = function.__name__ | ||
| exception.strerror = FormatError(code).strip() | ||
| return exception | ||
|
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| def check_null(result: int | None, function: _NamedFuncPointer, *_) -> int: | ||
| if result is None: | ||
| raise make_error(function) | ||
| return result | ||
|
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|
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| def check_false(result: int | None, function: _NamedFuncPointer, *_) -> Literal[True]: | ||
| if not bool(result): | ||
| raise make_error(function) | ||
| else: | ||
| return True | ||
|
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|
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| ### | ||
| # https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/core/cffi/_resource.py | ||
| ### | ||
|
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| _BeginUpdateResource = kernel32.BeginUpdateResourceW | ||
| _BeginUpdateResource.argtypes = [LPCWSTR, BOOL] | ||
| _BeginUpdateResource.restype = HANDLE | ||
| _BeginUpdateResource.errcheck = check_null # type: ignore[assignment] # ctypes is badly typed | ||
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| _EndUpdateResource = kernel32.EndUpdateResourceW | ||
| _EndUpdateResource.argtypes = [HANDLE, BOOL] | ||
| _EndUpdateResource.restype = BOOL | ||
| _EndUpdateResource.errcheck = check_false # type: ignore[assignment] # ctypes is badly typed | ||
|
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| _UpdateResource = kernel32.UpdateResourceW | ||
| _UpdateResource.argtypes = [HANDLE, LPCWSTR, LPCWSTR, WORD, LPVOID, DWORD] | ||
| _UpdateResource.restype = BOOL | ||
| _UpdateResource.errcheck = check_false # type: ignore[assignment] # ctypes is badly typed | ||
|
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||
|
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| ### | ||
| # https://github.com/enthought/pywin32-ctypes/blob/main/win32ctypes/pywin32/win32api.py | ||
| ### | ||
|
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| LANG_NEUTRAL = 0x00 | ||
|
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| def BeginUpdateResource(filename: str, delete: bool): | ||
| """Get a handle that can be used by the :func:`UpdateResource`. | ||
| Parameters | ||
| ---------- | ||
| fileName : str | ||
| The filename of the module to load. | ||
| delete : bool | ||
| When true all existing resources are deleted | ||
| Returns | ||
| ------- | ||
| result : hModule | ||
| Handle of the resource. | ||
| """ | ||
| return _BeginUpdateResource(filename, delete) | ||
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| def EndUpdateResource(handle: int, discard: bool) -> None: | ||
| """End the update resource of the handle. | ||
| Parameters | ||
| ---------- | ||
| handle : hModule | ||
| The handle of the resource as it is returned | ||
| by :func:`BeginUpdateResource` | ||
| discard : bool | ||
| When True all writes are discarded. | ||
| """ | ||
| _EndUpdateResource(handle, discard) | ||
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| def UpdateResource( | ||
| handle: int, | ||
| type: str | int, | ||
| name: str | int, | ||
| data: Iterable[SupportsIndex] | SupportsIndex | SupportsBytes | ReadableBuffer, | ||
| language: int = LANG_NEUTRAL, | ||
| ) -> None: | ||
| """Update a resource. | ||
| Parameters | ||
| ---------- | ||
| handle : hModule | ||
| The handle of the resource file as returned by | ||
| :func:`BeginUpdateResource`. | ||
| type : str | int | ||
| The type of resource to update. | ||
| name : str | int | ||
| The name or Id of the resource to update. | ||
| data : bytes-like | ||
| A bytes like object is expected. | ||
| language : int | ||
| Language to use, default is LANG_NEUTRAL. | ||
| """ | ||
| lp_data = bytes(data) | ||
| _UpdateResource( | ||
| handle, LPCWSTR(type), LPCWSTR(name), language, lp_data, len(lp_data) | ||
| ) |
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