fix: Ensure expected platform tag is associated with Linux wheels

This improves the handling of platform tags for Linux wheels by setting
the correct platform tag based on the VTK SDK archive name. This ensures
the wheels are correctly tagged and can be identified properly during
distribution.

Author: jcfr

.github/workflows/ci.yml

@@ -108,6 +108,14 @@ jobs:
           CIBW_BUILD: "cp310-* cp311-* cp312-* cp313-*"
           CIBW_ARCHS: "${{ matrix.arch }}"
           CIBW_REPAIR_WHEEL_COMMAND: ""
+          # Workaround to allow mapping current wheel tag with the one extracted from
+          # the vtk-sdk archive name
+          VTK_SDK_WHEEL_OUTPUT_DIR: "/host/wheelhouse"
+          CIBW_ENVIRONMENT_PASS_LINUX: "VTK_SDK_WHEEL_OUTPUT_DIR"
+          CIBW_REPAIR_WHEEL_COMMAND_LINUX:
+            'mv {wheel} {dest_dir}/ && uvx wheel tags --remove --platform-tag
+            "$(cat "$VTK_SDK_WHEEL_OUTPUT_DIR/$(basename {wheel}-tag)")"
+            "{dest_dir}/$(basename {wheel})"'
 
       - name: Upload wheels
         uses: actions/upload-artifact@v4

cmake/vtk-sdk-urls.cmake

@@ -15,7 +15,7 @@ message(STATUS "  python_tag: ${python_tag}")
 message(STATUS "  abi_tag: ${abi_tag}")
 
 # Platform tag
-if(LINUX)
+if(UNIX AND NOT APPLE)
   if(Python_SOABI MATCHES "x86_64")
     set(platform_tag "manylinux2014_x86_64.manylinux_2_17_x86_64")
   elseif(Python_SOABI MATCHES "aarch64")
@@ -122,3 +122,33 @@ endif()
 set(VTK_SDK_EXPECTED_SHA256
     ${sha256_${VTK_VERSION}-${python_tag}-${abi_tag}-${platform_tag}})
 message(STATUS "Setting VTK_SDK_EXPECTED_SHA256: ${VTK_SDK_EXPECTED_SHA256}")
+
+# ----------------------------------------------------------------------------
+# On Linux (manylinux), compute the pre-repair platform tag and write the
+# expected final platform tag (derived from the VTK SDK archive) to a file that
+# the wheel repair step will read.
+if(UNIX AND NOT APPLE)
+  # Determine the platform tag as produced by the current build environment
+  execute_process(
+    COMMAND
+      "${Python3_EXECUTABLE}" -c
+      "import sysconfig; print(sysconfig.get_platform().replace('-', '_'))"
+    OUTPUT_VARIABLE pre_repair_platform_tag
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+  message(STATUS "Pre-repair platform tag: ${pre_repair_platform_tag}")
+
+  # Map current wheel tag to the one from the VTK SDK archive name
+  set(wheel_output_dir "$ENV{VTK_SDK_WHEEL_OUTPUT_DIR}")
+  if(NOT "${wheel_output_dir}" STREQUAL "")
+    message(STATUS "VTK_SDK_WHEEL_OUTPUT_DIR: ${wheel_output_dir}")
+    file(MAKE_DIRECTORY "${wheel_output_dir}")
+    set(wheel_tag_file
+        "vtk_sdk-${_norm_tag}-${python_tag}-${abi_tag}-${pre_repair_platform_tag}.whl-tag"
+    )
+    file(WRITE "${wheel_output_dir}/${wheel_tag_file}" "${platform_tag}")
+    message(
+      STATUS
+        "Wrote expected platform tag '${platform_tag}' to: ${wheel_tag_file}")
+  endif()
+endif()