Fix polaris cli initialization (apache#150)

regtests/Dockerfile

@@ -34,7 +34,7 @@ WORKDIR /home/spark/regtests
 COPY ./setup.sh /home/spark/regtests/setup.sh
 COPY ./pyspark-setup.sh /home/spark/regtests/pyspark-setup.sh
 COPY ./client/python /home/spark/regtests/client/python
-COPY ./polaris /home/spark
+COPY ./polaris-reg-test /home/spark/polaris
 
 RUN python3 -m venv /home/spark/polaris-venv && \
     . /home/spark/polaris-venv/bin/activate && \

regtests/polaris → regtests/polaris-reg-test

@@ -15,13 +15,21 @@
 # limitations under the License.
 #
 
-################################################
-# This is a modified copy of the script in the #
-# parent directory, used for regression tests. #
-################################################
+####################################################
+# This is a modified copy of the polaris script in #
+# the parent directory, used for regression tests. #
+####################################################
 
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
+# Check if the current directory is 'regtests' and abort if it is
+if [ $(basename ${SCRIPT_DIR}) == "regtests" ]; then
+  echo "This script is intended solely for regression testing and cannot be executed from within the 'regtests' directory. Please use the script from the parent directory: $(dirname ${SCRIPT_DIR})/polaris"
+  exit 1
+fi
+
+# Check if the virtual environment directory 'polaris-venv' exists.
+# If it does not, perform the first-time setup for the Python client
 if [ ! -d ${SCRIPT_DIR}/polaris-venv ]; then
   echo "Performing first-time setup for the Python client..."
   python3 -m venv ${SCRIPT_DIR}/polaris-venv
@@ -50,4 +58,4 @@ if [ $status -ne 0 ]; then
   exit 1
 fi
 
-exit 0
+exit 0