feat: add universal2 support

Author: mayeut

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
           - os: windows-2016
             arch: "x86"
           - os: macos-10.15
-            arch: "x86_64"
+            arch: "universal2"
 
     steps:
       - uses: actions/checkout@v2

noxfile.py

@@ -1,15 +1,21 @@
 # -*- coding: utf-8 -*-
 import argparse
+import sys
 from pathlib import Path
 
 import nox
 
 nox.options.sessions = ["lint", "build", "tests"]
 
-BUILD_ENV = {
-    "MACOSX_DEPLOYMENT_TARGET": "10.9",
-}
-
+if sys.platform.startswith("darwin"):
+    BUILD_ENV = {
+        "MACOSX_DEPLOYMENT_TARGET": "10.9",
+        "CMAKE_OSX_ARCHITECTURES": "arm64;x86_64",
+        "CFLAGS": "-save-temps",
+        "CXXFLAGS": "-save-temps",
+    }
+else:
+    BUILD_ENV = {}
 
 built = ""
 

pyproject.toml

@@ -19,6 +19,7 @@ manylinux-i686-image = "manylinux1"
 
 [tool.cibuildwheel.macos.environment]
 MACOSX_DEPLOYMENT_TARGET = "10.9"
+CMAKE_OSX_ARCHITECTURES = "arm64;x86_64"
 
 [tool.cibuildwheel.windows]
 before-all = [

scripts/repair_wheel.py

@@ -43,7 +43,7 @@ def main():
             subprocess.run(["auditwheel", "repair", "-w", str(tmpdir), str(file)], check=True, stdout=subprocess.PIPE)
         elif os_ == "macos":
             subprocess.run(
-                ["delocate-wheel", "--require-archs", "x86_64", "-w", str(tmpdir), str(file)],
+                ["delocate-wheel", "--require-archs", "x86_64,arm64", "-w", str(tmpdir), str(file)],
                 check=True,
                 stdout=subprocess.PIPE,
             )
@@ -54,11 +54,34 @@ def main():
         assert len(files) == 1, files
         file = files[0]
 
+        # we need to handle macOS universal2 & arm64 here for now, let's use additional_platforms for this.
+        additional_platforms = []
+        if os_ == "macos":
+            # first, get the target macOS deployment target from the wheel
+            match = re.match(r"^.*-macosx_(\d+)_(\d+)_x86_64\.whl$", file.name)
+            assert match is not None
+            target = tuple(map(int, match.groups()))
+
+            # let's add universal2 platform for this wheel.
+            additional_platforms = ["macosx_{}_{}_universal2".format(*target)]
+
+            # given pip support for universal2 was added after arm64 introduction
+            # let's also add arm64 platform.
+            arm64_target = target
+            if arm64_target < (11, 0):
+                arm64_target = (11, 0)
+            additional_platforms.append("macosx_{}_{}_arm64".format(*arm64_target))
+
+            if target < (11, 0):
+                # They're were also issues with pip not picking up some universal2 wheels, tag twice
+                additional_platforms.append("macosx_11_0_universal2")
+
         # make this a py2.py3 wheel
         convert_to_generic_platform_wheel(
             str(file),
             out_dir=str(wheelhouse),
             py2_py3=True,
+            additional_platforms=additional_platforms,
         )