Separate version output and add purging

plugin.sh

@@ -36,10 +36,11 @@ load_deploy_key() {
   echo "--- end ssh key load ---"
 }
 
-run_stack_deploy() {
-  echo "--- start docker info ---"
+output_versions(){
+  echo "--- start versions"
   docker version
-  echo "--- end docker info ---"
+  echo "--- end versions"
+}
 
 run_stack_deploy() {
   echo "--- start deploy ---"
@@ -53,8 +54,15 @@ run_stack_wait() {
   | bash /dev/stdin "$PLUGIN_STACK"
 }
 
+run_purge() {
+  echo "--- start purge ---"
+  docker prune --all --volumes --force
+  echo "--- end purge ---"
+}
+
 run_plugin() {
-  echo "--- start deployment ---"
+  echo "--- start ssh-stack-deploy ---"
+  output_versions
   load_deploy_key
 
   if [ -n "$PLUGIN_GENERATE_SECRETS" ]; then
@@ -63,7 +71,11 @@ run_plugin() {
 
   run_stack_deploy
   run_stack_wait
-  echo "--- end deployment ---"
+
+  if [ "$PLUGIN_PURGE" == "true" ]; then
+    run_purge
+  fi
+  echo "--- end ssh-stack-deploy ---"
 }
 
 run_plugin