simplify code a bit

hack/jenkins/common.sh

@@ -76,11 +76,9 @@ function retry_github_status() {
 }
 
 if [ "$(uname)" = "Darwin" ]; then
-  bash setup_docker_desktop_macos.sh
-  ec=$?
-  if [ $ec -gt 0 ]; then
+  if ! bash setup_docker_desktop_macos.sh; then
     retry_github_status "${COMMIT}" "${JOB_NAME}" "failure" "${access_token}" "${public_log_url}" "Jenkins: docker failed to start"
-    exit $ec
+    exit 1
   fi
 fi
 

hack/jenkins/setup_docker_desktop_macos.sh

@@ -14,6 +14,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+set -x
+
 # kill docker first
 osascript -e 'quit app "Docker"'
 
@@ -34,4 +36,3 @@ do
 done
 
 echo "Docker Desktop started!"
-exit 0