fuse wheels to create universal2

common_utils.sh

@@ -271,9 +271,6 @@ function bdist_wheel_cmd {
 }
 
 function run_command_universal2 {
-    if [[ "${PLAT:-}" == "arm64" ]]; then
-        export PLAT_BACKUP="arm64"
-    fi
     if [[ "${PLAT:-}" == "universal2" ]]; then
         export PLAT_BACKUP="universal2"
         (
@@ -289,6 +286,7 @@ function run_command_universal2 {
         rm -rf *-stamp
     fi
     if [[ "${PLAT:-}" == "universal2" || "${PLAT:-}" == "arm64" ]]; then
+        (
           export PLAT="arm64"
           export BUILD_PREFIX=/opt/arm64-builds
           sudo mkdir -p $BUILD_PREFIX
@@ -304,7 +302,26 @@ function run_command_universal2 {
           export LDFLAGS+=" -arch arm64 -L$BUILD_PREFIX/lib -Wl,-rpath,$BUILD_PREFIX/lib ${FC_ARM64_LDFLAGS:-}"
           export host_alias="aarch64-apple-darwin20.0.0"
           $@
-        export PLAT="$PLAT_BACKUP"
+        )
+
+        local wheelhouse=$(abspath ${WHEEL_SDIR:-wheelhouse})
+        mkdir -p wheelhouse2
+        if [[ "${PLAT:-}" == "universal2" ]]; then
+           for whl in $wheelhouse/*.whl; do
+              if [[ "$whl" == *macosx_10_9_x86_64.whl ]]; then
+                  whl_base=$(echo $whl | rev | cut -c 23- | rev)
+                  echo $whl_base
+                  if [[ -f "${whl_base}macosx_11_0_arm64.whl" ]]; then
+                      delocate-fuse $whl "${whl_base}macosx_11_0_arm64.whl" -w wheelhouse2
+                      mv wheelhouse2/$(basename $whl) $wheelhouse/$(basename ${whl_base})macosx_10_9_universal2.whl
+                      # Since we want one wheel thats installable for testing we are deleting the 10_9_x86_64 wheel.
+                      # We are not deleting arm64 wheel because the size is lower and homebrew/conda-forge python
+                      # will use them by default
+                      rm $whl
+                  fi
+              fi
+           done
+        fi
     else
         $@
     fi