avoid bogus naming of the macos wheels as universal2 despite intel-only (#309)

Author: slayoo

.github/workflows/tests+pypi.yml

@@ -94,6 +94,7 @@ jobs:
           brew reinstall gcc
           sudo xcode-select -s "/Applications/Xcode_13.4.1.app"
           echo MACOSX_DEPLOYMENT_TARGET=`sw_vers -productVersion` >> $GITHUB_ENV
+          echo ARCHFLAGS="-arch x86_64" >> $GITHUB_ENV  # this seems to have no effect on whl name on Python 3.11!
 
       - if: matrix.platform == 'windows-latest'
         uses: msys2/setup-msys2@v2
@@ -133,6 +134,18 @@ jobs:
           python -m build 2>&1 | tee build.log
           exit `fgrep -i warning build.log | grep -v "WARNING setuptools_scm" | wc -l`
 
+      - if: startsWith(matrix.platform, 'macos-') && matrix.python-version == '3.11'
+        run: |
+          # workaround for buggy universal2 wheel name with Python 3.11 (contains x86_64 binary only)
+          for whl in dist/*_universal2.whl; do
+            export whl_new=${whl/_universal2/_x86_64};
+            mv $whl $whl_new;
+            python -m wheel unpack $whl_new;
+            export whl_new_unpacked=`basename $whl_new | cut -d- -f-2`;
+            sed -i '' 's/_universal2/_x86_64/g' $whl_new_unpacked/$whl_new_unpacked.dist-info/WHEEL;
+            python -m wheel pack $whl_new_unpacked;
+          done
+          
       - if: matrix.platform == 'ubuntu-latest'
         run: rm dist/*