try building wheels with CI for pdffit2

.github/workflows/wheels.yml

@@ -0,0 +1,93 @@
+name: Wheel builder
+
+on:
+  # workflow_call:
+  #     inputs:
+  #         project:
+  #           description: 'Name of the project to test'
+  #           default: 'PROJECT_NAME'
+  #           required: false
+  #           type: string
+  #         c_extension:
+  #           description: 'Whether the project has a C extension'
+  #           default: false
+  #           required: false
+  #           type: boolean
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build_wheels:
+
+    defaults:
+        run:
+          shell: bash -l {0}
+
+    name: Build wheel ${{ matrix.python[0] }}-${{ matrix.buildplat[0] }}
+    runs-on: ${{ matrix.buildplat[0] }}
+    strategy:
+      fail-fast: false
+      matrix:
+        buildplat:
+          - [ubuntu-latest, manylinux_x86_64]
+          - [macos-13, macosx_x86_64]
+          - [macos-14, macosx_arm64]
+          - [windows-latest, win_amd64]
+        python:
+          - ["3.10", "cp310"]
+          - ["3.11", "cp311"]
+          - ["3.12", "cp312"]
+
+    steps:
+      - name: Check out #${{ inputs.project }}
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python[0] }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python[0] }}
+
+      - name: Build wheels for Linux
+        if: runner.os == 'Linux'
+        uses: pypa/cibuildwheel@v2.21.1
+        env:
+          CIBW_BUILD: ${{ matrix.python[1] }}-${{ matrix.buildplat[1] }}
+          CIBW_BEFORE_BUILD: yum install -y gsl-devel && pip install -e .
+        with:
+          output-dir: wheelhouse
+
+      - name: Build wheels for macOS
+        if: runner.os == 'macOS'
+        uses: pypa/cibuildwheel@v2.21.1
+        env:
+          CIBW_BUILD: ${{ matrix.python[1] }}-${{ matrix.buildplat[1] }}
+          MACOSX_DEPLOYMENT_TARGET: 13.0
+          CIBW_BEFORE_BUILD: brew install gsl && pip install -e .
+        with:
+          output-dir: wheelhouse
+
+      - name: Install GSL and Set Environment for GSL on Windows
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: |
+          git clone https://github.com/microsoft/vcpkg.git C:\vcpkg
+          cd C:\vcpkg
+          .\bootstrap-vcpkg.bat
+          .\vcpkg integrate install
+          .\vcpkg install gsl gsl:x64-windows
+
+      - name: Build wheels for Windows
+        if: runner.os == 'Windows'
+        uses: pypa/cibuildwheel@v2.21.1
+        env:
+          CIBW_BUILD: ${{ matrix.python[1] }}-${{ matrix.buildplat[1] }}
+          CIBW_ENVIRONMENT: |
+            GSL_PATH=C:/vcpkg/installed/x64-windows
+          CONDA_PREFIX: ${{ env.CONDA_PREFIX }}
+        with:
+          output-dir: wheelhouse
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.python[0] }}-${{ matrix.buildplat[0] }}
+          path: ./wheelhouse/*.whl

setup.py

@@ -64,16 +64,23 @@ def get_gsl_config():
 
 
 def get_gsl_config_win():
-    """Return dictionary with paths to GSL library, windwows version.
-    This version is installed with conda.
-    """
-    conda_prefix = os.environ["CONDA_PREFIX"]
-    inc = os.path.join(conda_prefix, "Library", "include")
-    lib = os.path.join(conda_prefix, "Library", "lib")
-    rv = {"include_dirs": [], "library_dirs": []}
-    rv["include_dirs"] += [inc]
-    rv["library_dirs"] += [lib]
-    return rv
+    """Return dictionary with paths to GSL library on Windows."""
+    gsl_path = os.environ.get("GSL_PATH")
+    if gsl_path:
+        inc = os.path.join(gsl_path, "include")
+        lib = os.path.join(gsl_path, "lib")
+    else:
+        conda_prefix = os.environ.get("CONDA_PREFIX")
+        if conda_prefix:
+            inc = os.path.join(conda_prefix, "Library", "include")
+            lib = os.path.join(conda_prefix, "Library", "lib")
+        else:
+            raise EnvironmentError(
+                "Neither GSL_PATH nor CONDA_PREFIX environment variables are set. "
+                "Please ensure GSL is installed and GSL_PATH is correctly set."
+            )
+
+    return {"include_dirs": [inc], "library_dirs": [lib]}
 
 
 # ----------------------------------------------------------------------------
@@ -87,19 +94,23 @@ def get_gsl_config_win():
     gcfg = get_gsl_config()
 include_dirs = [MYDIR] + gcfg["include_dirs"]
 library_dirs = []
-libraries = []
+if sys.platform == "darwin":
+    libraries = []
+else:
+    libraries = ["gsl"]
 extra_objects = []
 extra_compile_args = []
 extra_link_args = []
 
 compiler_type = get_compiler_type()
 if compiler_type in ("unix", "cygwin", "mingw32"):
     extra_compile_args = ["-std=c++11", "-Wall", "-Wno-write-strings", "-O3", "-funroll-loops", "-ffast-math"]
-    extra_objects += ((p + "/libgsl.a") for p in gcfg["library_dirs"])
+    extra_objects += [
+        os.path.join(p, "libgsl.a") for p in gcfg["library_dirs"] if os.path.isfile(os.path.join(p, "libgsl.a"))
+    ]
 elif compiler_type == "msvc":
     define_macros += [("_USE_MATH_DEFINES", None)]
     extra_compile_args = ["/EHs"]
-    libraries += ["gsl"]
     library_dirs += gcfg["library_dirs"]
 # add optimization flags for other compilers if needed