Fix Windows link.exe: prepend MSVC bin dir to PATH via GHA expression

Use ${{ env.VCToolsInstallDir }} (resolved at YAML parse time) instead
of $VCToolsInstallDir (cibuildwheel runtime expansion, which silently
failed). This prepends the MSVC bin dir to PATH so link.exe resolves
to MSVC's linker instead of Git's /usr/bin/link.exe.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: kkraus14

.github/workflows/build-wheel.yml

@@ -182,12 +182,7 @@ jobs:
           CIBW_ENVIRONMENT_WINDOWS: >
             CUDA_PATH="$(cygpath -w ${{ env.CUDA_PATH }})"
             CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}
-          # Git ships /usr/bin/link.exe (POSIX hardlink tool) which shadows
-          # MSVC's linker when DISTUTILS_USE_SDK=1 skips vcvarsall.bat.
-          CIBW_BEFORE_BUILD_WINDOWS: >
-            pip install delvewheel &&
-            if exist "C:\Program Files\Git\usr\bin\link.exe"
-            (rename "C:\Program Files\Git\usr\bin\link.exe" link.exe.bak)
+            PATH="${{ env.VCToolsInstallDir }}bin/Hostx64/x64;$PATH"
           # check cache stats before leaving cibuildwheel
           CIBW_BEFORE_TEST_LINUX: >
             "/host/${{ env.SCCACHE_PATH }}" --show-stats
@@ -248,10 +243,7 @@ jobs:
             CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}
             CUDA_CORE_BUILD_MAJOR=${{ env.BUILD_CUDA_MAJOR }}
             PIP_FIND_LINKS="$(cygpath -w ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }})"
-          CIBW_BEFORE_BUILD_WINDOWS: >
-            pip install delvewheel &&
-            if exist "C:\Program Files\Git\usr\bin\link.exe"
-            (rename "C:\Program Files\Git\usr\bin\link.exe" link.exe.bak)
+            PATH="${{ env.VCToolsInstallDir }}bin/Hostx64/x64;$PATH"
           # check cache stats before leaving cibuildwheel
           CIBW_BEFORE_TEST_LINUX: >
             "/host${{ env.SCCACHE_PATH }}" --show-stats
@@ -450,10 +442,7 @@ jobs:
             CUDA_PYTHON_PARALLEL_LEVEL=${{ env.CUDA_PYTHON_PARALLEL_LEVEL }}
             CUDA_CORE_BUILD_MAJOR=${{ env.BUILD_PREV_CUDA_MAJOR }}
             PIP_FIND_LINKS="$(cygpath -w ${{ env.CUDA_BINDINGS_ARTIFACTS_DIR }})"
-          CIBW_BEFORE_BUILD_WINDOWS: >
-            pip install delvewheel &&
-            if exist "C:\Program Files\Git\usr\bin\link.exe"
-            (rename "C:\Program Files\Git\usr\bin\link.exe" link.exe.bak)
+            PATH="${{ env.VCToolsInstallDir }}bin/Hostx64/x64;$PATH"
           # check cache stats before leaving cibuildwheel
           CIBW_BEFORE_TEST_LINUX: >
             "/host${{ env.SCCACHE_PATH }}" --show-stats