maildirscan.sh

#!/bin/sh

# This script searches directory for maildirs.
# It is designed to work with mutt. Add following line to your muttrc:
# mailboxes `/path/to/maildirscan.sh /path/to/top/level/maildir

# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://sam.zoy.org/wtfpl/COPYING for more details.
`
if [ "$#" != "1" ]; then
  exit 1
fi

scan() {
  cd $1
  local list="$(ls -x)"
  for I in $list; do
    if [ -d $I ]; then
      if [ "$I" != "cur" -a "$I" != "tmp" -a "$I" != "new" ]; then
        scan $I
      fi
    fi
  done
  if echo "x $list x" | grep " new " > /dev/null; then
    echo -n "$PWD "
  fi
  cd ..
}

scan $1
echo