#!/bin/sh
#
# /usr/local/sbin/adduser.local
# Copyright 2005-2006 Jonas Smedegaard <dr@jones.dk>
#
# $Id: localmb2md,v 1.4 2006-01-18 11:25:34 jonas Exp $
#
# Convert user account from mailboxes below /var/mail/ and ~/mail/ to
# maildirs below ~/Maildir/ .
#
# If from a different account, execute it like this:
#
#     su -s /bin/sh -c localmb2md - <user>
#
# FIXME: Make sure no MUAs or pop/imap daemons are running
# TODO: Add --help (and perhaps --force) options
#

set -e

for prg in mb2md procmail mail-lock mail-touchlock mail-unlock; do
	if [ ! -f "/usr/bin/$prg" ]; then
		echo "ERROR: $prg not installed!"
		exit 1
	fi
done

# Make sure Maildir is used if procmailrc exists already
if [ -f ~/.procmailrc ] && egrep -v -q '^DEFAULT=\$HOME/Maildir/$' ~/.procmailrc; then
	echo 'ERROR: non-Maildir-aware ~/.procmailrc exists already.'
	echo '  Please edit manually to include the following line:'
	echo
	echo '      DEFAULT=$HOME/Maildir/'
	echo
	echo '  Make sure other rules use Maildirs too, if needed.'
	exit 1
fi


# Avoid incoming mail while messing with INBOX
mail-lock
mail-touchlock &
# Save the PID of the mail-touchlock process
BADGER="$!"

# Convert INBOX and purge if not empty
if [ -s "/var/mail/$USER" ]; then
	mb2md -m
	echo -n '' > "/var/mail/$USER"
else
	# Create Maildir for INBOX if not there already
	mkdir -p ~/Maildir/cur ~/Maildir/new ~/Maildir/tmp
	chmod -R u=rw,go=,u+X ~/Maildir
fi
# Reroute future incoming mail to Maildir
echo 'DEFAULT=$HOME/Maildir/' > ~/.procmailrc

# Allow incoming mail again
kill "${BADGER}"
mail-unlock

# Convert secondary mailboxes
if [ -d ~/mail ]; then
	mv ~/mail ~/mail.abandoned
	mb2md -s mail.abandoned
	# Grab dovecot subscriptions
	if [ -f ~/mail/.subscriptions ]; then
		mv ~/mail/.subscriptions ~/Maildir/.subscriptions
	# ...or UW-imap ones
	elif [ -f ~/.mailboxlist ]; then
		mv ~/.mailboxlist ~/Maildir/.subscriptions
	fi
fi