fix: adjust configuration for Colab compatibility

- Remove Windows support as not needed
- Move Python finding hints to cibuildwheel environment variables
- Keep pyproject.toml clean to avoid breaking normal builds
- Target manylinux_2_28 for better Colab compatibility

.github/workflows/build-cibuildwheel.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest]
         
     steps:
       - uses: actions/checkout@v4
@@ -58,9 +58,6 @@ jobs:
           CIBW_BEFORE_ALL_MACOS: |
             brew install boost zeromq openblas cmake
           
-          CIBW_BEFORE_ALL_WINDOWS: |
-            choco install cmake -y
-          
           # Test the wheel
           CIBW_TEST_COMMAND: |
             python -c "import leann_backend_hnsw; print('HNSW backend imported successfully')"
@@ -68,6 +65,8 @@ jobs:
           # Environment variables for build
           CIBW_ENVIRONMENT: |
             CMAKE_BUILD_PARALLEL_LEVEL=8
+            Python_FIND_VIRTUALENV=ONLY
+            Python3_FIND_VIRTUALENV=ONLY
       
       - name: Build leann-backend-diskann wheels  
         uses: pypa/cibuildwheel@v2.20.0
@@ -88,14 +87,13 @@ jobs:
           CIBW_BEFORE_ALL_MACOS: |
             brew install boost zeromq openblas cmake
           
-          CIBW_BEFORE_ALL_WINDOWS: |
-            choco install cmake -y
-          
           CIBW_TEST_COMMAND: |
             python -c "import leann_backend_diskann; print('DiskANN backend imported successfully')"
           
           CIBW_ENVIRONMENT: |
             CMAKE_BUILD_PARALLEL_LEVEL=8
+            Python_FIND_VIRTUALENV=ONLY
+            Python3_FIND_VIRTUALENV=ONLY
       
       - uses: actions/upload-artifact@v4
         with:

packages/leann-backend-diskann/pyproject.toml

@@ -22,6 +22,3 @@ sdist.include = ["CMakeLists.txt", "src", "third_party", "leann_backend_diskann/
 
 [tool.scikit-build.cmake.define]
 CMAKE_BUILD_PARALLEL_LEVEL = "8"
-# Help CMake find Python in cibuildwheel environments
-Python_FIND_VIRTUALENV = "ONLY"
-Python3_FIND_VIRTUALENV = "ONLY"

packages/leann-backend-hnsw/pyproject.toml

@@ -25,6 +25,3 @@ cmake.verbose = true
 # CMake definitions to optimize compilation
 [tool.scikit-build.cmake.define]
 CMAKE_BUILD_PARALLEL_LEVEL = "8"
-# Help CMake find Python in cibuildwheel environments
-Python_FIND_VIRTUALENV = "ONLY"
-Python3_FIND_VIRTUALENV = "ONLY"

pyproject.toml

@@ -79,7 +79,3 @@ before-all = """
 # macOS系统依赖
 [tool.cibuildwheel.macos]
 before-all = "brew install boost zeromq openblas cmake"
-
-# Windows系统依赖
-[tool.cibuildwheel.windows]
-before-all = "choco install cmake -y"