@@ -1223,14 +1223,12 @@ function pip_install {

 function setup_develop() {

     local project_dir=$1

-    echo "cd $REQUIREMENTS_DIR; $SUDO_CMD python update.py $project_dir"

-

     # Don't update repo if local changes exist

     # Don't use buggy "git diff --quiet"

-    (cd $project_dir && git diff --exit-code >/dev/null)

-    local update_requirements=$?

+    # ``errexit`` requires us to trap the exit code when the repo is changed

+    local update_requirements=$(cd $project_dir && git diff --exit-code >/dev/null || echo "changed")

-    if [ $update_requirements -eq 0 ]; then

+    if [[ $update_requirements = "changed" ]]; then

         (cd $REQUIREMENTS_DIR; \

             $SUDO_CMD python update.py $project_dir)

     fi

@@ -1246,7 +1244,7 @@ function setup_develop() {

     # a variable that tells us whether or not we should UNDO the requirements

     # changes (this will be set to False in the OpenStack ci gate)

     if [ $UNDO_REQUIREMENTS = "True" ]; then

-        if [ $update_requirements -eq 0 ]; then

+        if [[ $update_requirements = "changed" ]]; then

             (cd $project_dir && git reset --hard)

         fi

     fi