support runes for scrolling song title

diff --git a/scripts/scrolling-title.nix b/scripts/scrolling-title.nix
index 0bafa1b51365d24e2ac9049eea7c49fd48d80449..91d0838ad48264a3be4fe2045c2e720974c8edae 100644 (file)
--- a/scripts/scrolling-title.nix
+++ b/scripts/scrolling-title.nix
@@ -20,5 +20,7 @@ pkgs.writeShellApplication {
     INDEX=$(( T % LEN ))
 
     # Output the scrolled window
-    echo "$STR$STR" | cut -c "$((INDEX + 1))-$((INDEX + WIDTH))"'';
+    DOUBLE_STR="''$STR''$STR"
+    echo "''${DOUBLE_STR:''$INDEX:''$WIDTH}"
+'';
 }