Make PyPy wheels work (#100)

* Unpin numpy version for PyPy wheels

* Skip PyPy 3.10 due to lack of numpy wheels

Author: alugowski

.github/workflows/wheels.yml

@@ -138,8 +138,11 @@ jobs:
           # Architectures to build specified in matrix
           CIBW_ARCHS: ${{ matrix.cibw_archs }}
 
-          # No 32-bit builds, no musllinux, no PyPy aarch64 (only due to build speed, numpy does not ship aarch64 pypy wheels)
-          CIBW_SKIP: "*-win32 *_i686 *musl* pp*aarch64"
+          # No 32-bit builds
+          # no musllinux
+          # no PyPy aarch64 (only due to build speed, numpy does not ship aarch64 pypy wheels)
+          # as of writing numpy does not support pypy 3.10
+          CIBW_SKIP: "*-win32 *_i686 *musl* pp*aarch64 pp310*"
 
           # Use delvewheel on Windows.
           # This copies graphblas.dll into the wheel. "repair" in cibuildwheel parlance includes copying any shared

pyproject.toml

@@ -6,7 +6,10 @@ requires = [
     "wheel",
     "cffi>=1.11,<1.16",
     "cython",
-    "oldest-supported-numpy",
+    "oldest-supported-numpy; platform_python_implementation != 'PyPy'",
+    # Inspired by SciPy: unpin numpy version for PyPy builds,
+    # as oldest-supported-numpy does not take PyPy into account.
+    "numpy; platform_python_implementation=='PyPy'",
 ]
 
 [project]