rename single tracker torrent file by its tracker and folder name

rename_torrent_by_tracker.sh

 #!/bin/bash
mkdir renamed
for file in $PWD/*.torrent; do
#    echo $file
    #transmission-show $file>> ti.txt
    name=$(transmission-show $file|grep '  Name'| grep -Po '.*Name: \K.*')
    #echo $name
    tracker=$(transmission-show $file |grep -v Comment |grep 'http'| grep -Po '\/\/(.*?)\/'| grep -Po '[^\/]+(?=\/)')
#    echo $tracker
    tracker="${tracker} - "
    filename=$tracker$name".torrent"
    echo $filename
#    echo $PWD/renamed/$filename
    cp $file "${PWD}/renamed/${filename}"

done