backup diff: detect initial backup

plugins/transfer/restic.sh

@@ -207,14 +207,20 @@
         local _snapshotNow
 
         # get list of snapshots and filter the lines with a date YYYY-MM-DD
-        _data=$( t_restoreDoShowVolumes | grep "[12][0-9][0-9][0-1]-[0-2][0-9]-[0-3][0-9]" | tail -2 )
-
-        _snapshotLast=$( echo "$_data" | head -1 | cut -f 1 -d " ")
-        _snapshotNow=$(  echo "$_data" | tail -1 | cut -f 1 -d " ")
+        _data=$( t_restoreDoShowVolumes | grep "[12][0-9][0-9][0-1]-[0-2][0-9]-[0-3][0-9]" | tail -5 )
+        echo "..."
         echo "$_data"
-        color cmd
-        restic diff "${_snapshotLast}" "${_snapshotNow}"
-        color reset
+
+        _snapshotLast=$( echo "$_data" | tail -2 | head -1 | cut -f 1 -d " ")
+        _snapshotNow=$(  echo "$_data" | tail -1           | cut -f 1 -d " ")
+
+        if [ "${_snapshotLast}" = "${_snapshotNow}" ]; then
+            echo "This was the initial (full) Backup"
+        else
+            color cmd
+            restic diff "${_snapshotLast}" "${_snapshotNow}"
+            color reset
+        fi
         echo
 
     }