Prevent Docker from caching the git clone content

Signed-off-by: Aurélien Bompard <aurelien@bompard.org>

playbooks/openshift-apps/fasjson.yml

@@ -10,6 +10,12 @@
 
   vars:
 
+  pre_tasks:
+  - name: create a file with random content to prevent docker from caching the git clone
+    copy:
+      dest: /etc/openshift_apps/fasjson/random-file
+      content: "{{ now() }}"
+
   roles:
   - role: openshift/project
     app: fasjson

roles/openshift-apps/fasjson/templates/Dockerfile

@@ -28,6 +28,9 @@ RUN dnf install -y \
         python3-wheel && \
     dnf autoremove -y && \
     dnf clean all -y
+# Add a file with random content to prevent Docker from caching the git clone step.
+COPY random-file
+RUN rm -f random-file
 RUN git clone https://github.com/fedora-infra/fasjson.git && \
     pushd fasjson && \
     git checkout {{ (env == 'production')|ternary('stable', 'staging') }} && \