[Desktop Entry]
Type=Action
Name=Toggle filenames upper-/lowercase
Profiles=Batocera
SelectionCount=<50

[X-Action-Profile Batocera]
MimeTypes=all/allfiles
Exec=bash -c "cd %d; [[ %b =~ [A-Z] ]] && { for f in %B; do mv \"$f\" \"${f,,}\"; done; } ||  { for f in %B; do mv \"$f\" \"${f^^}\"; done; }"