containerized-rpmbuild: set starting directory based on mode (#6124)

toolkit/scripts/containerized-build/create_container_build.sh

@@ -229,6 +229,7 @@ docker build -q \
                 --build-arg version="$version" \
                 --build-arg enable_local_repo="$enable_local_repo" \
                 --build-arg mariner_repo="$repo_path" \
+                --build-arg mode="$mode" \
                 .
 
 echo "docker_image_tag is ${docker_image_tag}"

toolkit/scripts/containerized-build/resources/mariner.Dockerfile

@@ -3,6 +3,7 @@ FROM ${container_img}
 ARG version
 ARG enable_local_repo
 ARG mariner_repo
+ARG mode
 LABEL containerized-rpmbuild=$mariner_repo/build
 
 COPY resources/local_repo /etc/yum.repos.d/local_repo.disabled_repo
@@ -15,8 +16,10 @@ RUN echo "alias tdnf='tdnf --releasever=$version'"               >> /root/.bashr
 RUN if [[ "${enable_local_repo}" == "true" ]]; then echo "enable_local_repo" >> /root/.bashrc; fi
 
 RUN echo "cat /mariner_setup_dir/splash.txt"                     >> /root/.bashrc && \
-    echo "show_help"                                             >> /root/.bashrc && \
-    echo "cd /usr/src/mariner/ || { echo \"ERROR: Could not change directory to /usr/src/mariner/ \"; exit 1; }"  >> /root/.bashrc
+    echo "show_help"                                             >> /root/.bashrc
+
+RUN if [[ "${mode}" == "build" ]]; then echo "cd /usr/src/mariner || { echo \"ERROR: Could not change directory to /usr/src/mariner \"; exit 1; }"  >> /root/.bashrc; fi
+RUN if [[ "${mode}" == "test" ]]; then echo "cd /mnt || { echo \"ERROR: Could not change directory to /mnt \"; exit 1; }"  >> /root/.bashrc; fi
 
 # Install vim & git in the build env
 RUN tdnf --releasever=$version install -y vim git