Strip Python wheel binary

tools/run_tests/artifacts/build_package_python.sh

@@ -23,6 +23,24 @@ mkdir -p artifacts/
 # and we only collect them here to deliver them to the distribtest phase.
 cp -r "${EXTERNAL_GIT_ROOT}"/input_artifacts/python_*/* artifacts/ || true
 
+strip_binary_wheel() {
+    WHEEL_PATH="$1"
+    TEMP_WHEEL_DIR=$(mktemp -d)
+    wheel unpack "$WHEEL_PATH" -d "$TEMP_WHEEL_DIR"
+    find "$TEMP_WHEEL_DIR" -name "_protoc_compiler*.so" -exec strip --strip-debug {} ";"
+    find "$TEMP_WHEEL_DIR" -name "cygrpc*.so" -exec strip --strip-debug {} ";"
+
+    WHEEL_FILE=$(basename "$WHEEL_PATH")
+    DISTRIBUTION_NAME=$(basename "$WHEEL_PATH" | cut -d '-' -f 1)
+    VERSION=$(basename "$WHEEL_PATH" | cut -d '-' -f 2)
+    wheel pack "$TEMP_WHEEL_DIR/$DISTRIBUTION_NAME-$VERSION" -d "$TEMP_WHEEL_DIR"
+    mv "$TEMP_WHEEL_DIR/$WHEEL_FILE" "$WHEEL_PATH"
+}
+
+for wheel in artifacts/*.whl; do
+    strip_binary_wheel "$wheel"
+done
+
 # TODO: all the artifact builder configurations generate a grpcio-VERSION.tar.gz
 # source distribution package, and only one of them will end up
 # in the artifacts/ directory. They should be all equivalent though.