use CIBW overrides to build arm64 macOS wheels (#428)

Co-authored-by: Josh Moore <[email protected]>

Author: psobolewskiPhD

.github/workflows/wheel.yaml

@@ -18,9 +18,10 @@ jobs:
       CIBW_TEST_COMMAND: pytest --pyargs numcodecs
       CIBW_TEST_REQUIRES: pytest
       CIBW_SKIP: "pp* cp36-* *-musllinux_* *win32 *_i686 *_s390x"
-      CIBW_ENVIRONMENT: "DISABLE_NUMCODECS_AVX2=1"
-      CIBW_ENVIRONMENT_MACOS: 'MACOSX_DEPLOYMENT_TARGET=10.9 DISABLE_NUMCODECS_AVX2=1 CFLAGS="$CFLAGS -Wno-implicit-function-declaration"'
-
+      CIBW_ARCHS_MACOS: 'x86_64 arm64'
+      CIBW_TEST_SKIP: '*-macosx_arm64'
+      # note: CIBW_ENVIRONMENT is now set in pyproject.toml
+      
     steps:
       - uses: actions/checkout@v3
         with:

pyproject.toml

@@ -108,3 +108,11 @@ norecursedirs = [
     "notebooks",
     "numcodecs.egg-info",
 ]
+[tool.cibuildwheel]
+ environment = { DISABLE_NUMCODECS_AVX2=1 }
+ [tool.cibuildwheel.macos]
+ environment = { MACOSX_DEPLOYMENT_TARGET=10.9, CFLAGS="$CFLAGS -Wno-implicit-function-declaration" }
+ [[tool.cibuildwheel.overrides]]
+ select = "*-macosx_arm64"
+ environment = { DISABLE_NUMCODECS_SSE2=1 }
+