Prepare an image for upload (torrent/http)

• Compress the image

img=labriqueinternet_"$(date '+%d-%m-%Y')".img
loop=$(sudo losetup -f) 
sudo losetup -o 1048576 $loop $img
sudo mount $loop /mnt
sudo sfill -z -l -l -f /mnt
sudo umount /mnt
tar cfJ $img.tar.xz $img

• Create the meta file (torrent)

for img in $(ls ../brique/)
do
  echo $img;
  btmakemetafile http://ldn-fai.net:6969/announce \
    $img --announce_list \
    'http://ldn-fai.net:6969/announce|udp://tracker.torrent.eu.org:451' \
    --comment 'La Brique Internet : http://labriqueinter.net/' \
    --httpseeds 'http://repo.labriqueinter.net';
done

• Upload the `tar.xz` and `torrent` files on `mirabelle` (for http://repo.labriqueinter.net/)
• Upload the `torrent` file on `ginkgo` in `/torrent/btfiles/` (for allowed torrent on LDN tracker)