checking database schema version before setting it up, so that a valid db doesn't get overwritten!

entrypoint.sh

@@ -227,9 +227,16 @@ echo "+-- creating and setting permissions on the tmp directory '$WEBSCHLOCKER_T
 mkdir -p "$WEBSCHLOCKER_TMP_DIR"
 chown -R "$WEBSCHLOCKER_USER:$WEBSCHLOCKER_GROUP" "$WEBSCHLOCKER_TMP_DIR"
 
-# prep the database (as the correct user)
-echo "+-- setting up the database"
-su -p -c "env PATH=\"$PATH\" bundle exec rake db:setup RAILS_ENV=production" "$WEBSCHLOCKER_USER"
+# which version of the db we have?
+echo "+-- checking db schema version..."
+WEBSCHLEUDER_SCHEMA_VERSION="$( su -p -c "env PATH=\"$PATH\" bundle exec rake db:version RAILS_ENV=production" "$WEBSCHLOCKER_USER" | awk '/^Current version:/ {print $3}' )"
+if [[ $WEBSCHLEUDER_SCHEMA_VERSION > 0 ]]; then
+    echo "    +-- database schema version found: $WEBSCHLEUDER_SCHEMA_VERSION, no need for set-up"
+else
+    # prep the database (as the correct user)
+    echo "    +-- database schema not found, setting up the database"
+    su -p -c "env PATH=\"$PATH\" bundle exec rake db:setup RAILS_ENV=production" "$WEBSCHLOCKER_USER"
+fi
 
 # make sure the envvars are available within su
 export WEBSCHLOCKER_BIND_ADDRESS WEBSCHLOCKER_BIND_PORT