clean-chroots

#!/bin/zsh
setopt extendedglob nomatch errreturn

integer ret=0 br=0

cd /var/lib/archbuild

if btrfs filesystem df . &>/dev/null; then
  remove() {
    btrfs sub del $1
  }
else
  remove() {
    rm -rf $1
  }
fi

for chroot in */^root(/Nmh+12); do
  exec 9>>| $chroot.lock

  if ! flock -n 9; then
    echo "<5>Not deleting $chroot; in use"
    continue
  fi

  echo "<6>Deleting $chroot"

  if ! remove $chroot &>/dev/null; then
    echo "<3>Error deleting $chroot"
    ret=1
  fi

  # We don't remove the lockfile. Less races that way
done

exit $ret