Import 'pybind11' instead running of a subprocess

.github/workflows/build-topics-test-gha-branch.yml

@@ -37,7 +37,7 @@ jobs:
         with:
           python-version: ${{ matrix.python_version }}
       - name: Install Python packages
-        run: pip${{ matrix.python_version }} install auditwheel build Chrones pybind11 twine
+        run: pip${{ matrix.python_version }} install auditwheel build Chrones pybind11 twine wheel
       - name: Install CUDA
         run: |
           sudo apt-key adv --fetch-keys https://developer.download.nvidia.com/compute/cuda/repos/ubuntu2004/x86_64/3bf863cc.pub
@@ -87,7 +87,7 @@ jobs:
             rm *.tar.gz
 
       - name: Build the wheel
-        run: python${{ matrix.python_version }} -m build --wheel --outdir local-dist lincs-*
+        run: python${{ matrix.python_version }} -m build --no-isolation --wheel --outdir local-dist lincs-*
         env:
           LINCS_DEV_FORCE_NVCC: "true"
           LINCS_DEV_FORCE_CHRONES: "true"
@@ -115,7 +115,7 @@ jobs:
         with:
           python-version: ${{ matrix.python_version }}
       - name: Install Python packages
-        run: pip install build delvewheel pybind11 twine
+        run: pip install build delvewheel pybind11 twine wheel
       - name: Install CUDA
         uses: Jimver/[email protected]
         id: cuda-toolkit
@@ -173,7 +173,7 @@ jobs:
             rm *.tar.gz
 
       - name: Build the wheel
-        run: python -m build --wheel --outdir local-dist (get-item lincs-*)
+        run: python -m build --no-isolation --wheel --outdir local-dist (get-item lincs-*)
         env:
           LINCS_DEV_FORCE_NVCC: "true"
           LINCS_DEV_DEPENDENCIES: d:\lincs-deps
@@ -204,7 +204,7 @@ jobs:
         with:
           python-version: ${{ matrix.python_version }}
       - name: Install Python packages
-        run: pip3 install build delocate pybind11 twine
+        run: pip3 install build delocate pybind11 twine wheel
       - name: Install OpenMP
         run: |
             cd /Users/runner/work
@@ -246,7 +246,7 @@ jobs:
             rm *.tar.gz
 
       - name: Build the wheel
-        run: python3 -m build --wheel --outdir local-dist lincs-*
+        run: python3 -m build --no-isolation --wheel --outdir local-dist lincs-*
       - name: Make the wheel machine-independent
         run: delocate-wheel --wheel-dir dist local-dist/*.whl
       - name: Check the wheel

setup.py

@@ -225,14 +225,11 @@ def make_liblincs_extension():
             print("WARNING: 'chrones' was not found, lincs will be compiled without Chrones", file=sys.stderr)
 
     try:
-        include_dirs += [
-            option[2:]
-            for option in subprocess.run(
-                [sys.executable, "-m", "pybind11", "--includes"], capture_output=True, universal_newlines=True, check=True,
-            ).stdout.strip().split(" ")
-        ]
-    except subprocess.CalledProcessError:
-        print("WARNING: 'pybind11' was not found, compilation will fail", file=sys.stderr)
+        import pybind11
+    except ImportError:
+        print("WARNING: 'pybind11' was not found, compilation will fail. (Source distribution is OK)", file=sys.stderr)
+    else:
+        include_dirs += [pybind11.get_include()]
 
     if sys.platform == "linux":
         extra_compile_args["c++"] = ["-std=c++17", "-Werror=switch", "-fopenmp"]