rename.sh

#
# Renames all retroarch thumbnails names, roms names, and reupdates the playlist.lpl files with said information.
#
# If your playlists names match your rom directories this will rename all cusom images and roms according to the lpl 
# file passed in. Copy all your playlists over to where this script is located and from a wsl (windows subsystem for linus) console
# and ussage would be:
#
# bash rename.sh "PlaylistFile.lpl" "/your/retroarch/thumbnails/folder" "/your/retroarch/roms/folder" "/your/retroarch/playlists/folder"
#
# To update your entire retroarch at once you can follow the above advice and run:
#
# for f in *.lpl;do bash rename.sh "PlaylistFile.lpl" "/your/retroarch/thumbnails/folder" "/your/retroarch/roms/folder" "/your/retroarch/playlists/folder" 2>/dev/null;done
#
IFS=$'\n'
for file in $(cat "$1" | grep -oP '.*/\K.*\.([^"]*)'); do
	ext=${file##*.}; pngname=${file:0:-((${#ext}+1))}
	escfile=$(echo $file | perl -pe 's/([[\]()+\$^{}])/\\$1/g')
	newname=$(cat "$1" | grep -zoP "$escfile"'",\s*\"label\": \"\K[^"]*')
	newname=$(echo "$newname" | perl -pe 's/[&*\/:`<>?\|]/_/g')
	if [[ "$pngname" != "$newname" ]]; then
		dir="${1:0:-4}"
		mv "/$2/$dir/Named_Titles/$pngname.png" "/$2/$dir/Named_Titles/$newname.png"
		mv "/$2/$dir/Named_Snaps/$pngname.png" "/$2/$dir/Named_Snaps/$newname.png"
		mv "/$2/$dir/Named_Boxarts/$pngname.png" "/$2/$dir/Named_Boxarts/$newname.png"
		mv "/$3/$dir/$file" "/$3/$dir/$newname.$ext"
		perl -i -pe "s/$escfile\"/$newname.$ext\"/g" "/$4/$1"	
	fi
done
unset IFS
echo "Done."