Add check for current tag

files/update_mastodon.sh

@@ -91,6 +91,8 @@ if [ "${DEBUG}" == "true" ]; then
     echo "Changing to Mastodon's home directory '${mastodon_home}'..."
 fi
 cd "${mastodon_home}" || exit 3
+current_tag=$(git name-rev --name-only HEAD | awk 'BEGIN {FS="/"} {print($2)}')
+if [ "${current_tag}" != "${tag}" ]; then
     if [ "${DEBUG}" == "true" ]; then
         echo "Fetching from repository..."
     fi
@@ -122,3 +124,7 @@ if [ "${DEBUG}" == "true" ]; then
         echo "Restarting Mastodon services..."
     fi
     "${pre_command}"sudo systemctl restart mastodon-sidekiq.service mastodon-web.service mastodon-streaming mastodon-streaming@4000.service
+else
+    echo "Current branch is already '${tag}'"
+    exit 0
+fi