Script to automatically remove torrents and delete local data from your Transmission client after seeding for x amount of days (15 by default).

transmission_auto_remove.sh

#!/bin/bash
# Enter your username and password for your Transmission instance
USER=username
PASSWD=passw0rd123

# Obtain index ids of completed torrents.
torrent_ids=$(transmission-remote -n $USER:$PASSWD -l\
        | awk '$5=="Done"{print $1}')

for index in $torrent_ids; do
        # Get creation date from torrent details.
        created=$(transmission-remote -n $USER:$PASSWD -t $index -i\
                | grep "Date added:"\
                | cut -d: -f2-\
                | sed 's/^ *//')

        echo -e "Torrent $index:\n\tcreated:$created"

        # Calculate torrent's age.

        # Convert dates to timestap so they can be substracted.
        now_ts=$(date +%s)
        torrent_ts=$(date +%s -d "$created")


        # Substract timestamps and get days difference.
        secs_in_day=86400
        age=`echo \($now_ts - $torrent_ts\) / $secs_in_day| bc`

        echo -e "\tthat's $age days old."

        # If it's older than 15 days old, delete it.
        if [ $age -ge 15  ]; then
                echo -e "\t *** Removing ***"
                echo -e "\ttransmission-remote -n $USER:$PASSWD -t $index --remove-and-delete"
                transmission-remote -n $USER:$PASSWD -t $index --remove-and-delete
        else
                echo -e "\tKept."
        fi
done