#!/bin/sh

disable_sendmail() {
	echo "===> I hope you know what you are doing:"
	echo "===> You just told your system to not"
	echo "===> automaticaly start sendmail on your"
	echo "===> next startup."
	echo "===> (i.e., added sendmail_enable=\"NONE\" to rc.conf)"

	if [ -f ${RC_CONF_FILE} ]; then
		echo sendmail_enable=\"NONE\" >> ${RC_CONF_FILE}
	fi
}

enable_qmail() {
	if [ -f ${MAILER_CONF_FILE} ]; then
		cp ${MAILER_CONF_FILE} ${MAILER_CONF_FILE}.bak && \
		cp %%DOCSDIR%%/mailer.conf.sample ${MAILER_CONF_FILE}
	else
		echo "===> ERROR: YOU DO NOT HAVE A VALID ${MAILER_CONF_FILE}"
		echo "===> FIX this and try again"
		echo "===> or, run \"$0 --force\" if you are sure"
		echo "===> you want this port replacing some binaries"
		echo "===> IF THIS FEELS UNEASY, read %%DOCSDIR%%/REMOVE.sendmail and do it manually"
		echo ""
		echo "=======> VERY IMPORTANT <======="
		echo "===> One side issue is that if you do replace them,"
		echo "===> you really should consider ADDING \"NO_SENDMAIL=true\""
		echo "===> to your /etc/make.conf if you do \"make world\"."
		echo "===> Otherwise, \"make world\" will \"fix\" your sendmail"
		echo "===> installation breaking your qmail one."
		echo "===> Read the FreeBSD Handbook section on \"make world\""
		echo "===> if you do not know what I am talking about."
		echo "===> Check http://www.FreeBSD.org/ for the most"
		echo "===> updated copy of the Handbook."
	fi
	echo "===> Do not forget to choose an appropriate qmail startup"
	echo "===> script. Go through %%PREFIX%%/boot, choose one"
	echo "===> and copy the chosen script as %%PREFIX%%/rc"
	echo "===> For example, \"cp %%PREFIX%%/boot/proc+df %%PREFIX%%/rc\""
}

# taken from mail/postfix idea
force_enable_qmail() {
	echo "===> Replacing sendmail"
	if [ -e ${SENDMAIL} ]; then
		mv -f ${SENDMAIL} ${SENDMAIL}.OFF && \
		chmod 0 ${SENDMAIL}.OFF
	fi
	if [ -e %%PREFIX%%/bin/sendmail ]; then
		ln -sf %%PREFIX%%/bin/sendmail ${SENDMAIL}
	fi

	echo "===> Replacing mailq"
	if [ -e ${MAILQ} ]; then
		mv -f ${MAILQ} ${MAILQ}.OFF && \
		chmod 0 ${MAILQ}.OFF
	fi
	if [ -e %%PREFIX%%/bin/qmail-qread ]; then
		ln -sf %%PREFIX%%/bin/qmail-qread ${MAILQ}
	fi

	echo "===> Replacing newaliases"
	if [ -e ${NEWALIASES} ]; then
		mv -f ${NEWALIASES} ${NEWALIASES}.OFF && \
		chmod 0 ${NEWALIASES}.OFF
	fi
	if [ -e %%PREFIX%%/bin/newaliases ]; then
		ln -sf %%PREFIX%%/bin/newaliases ${NEWALIASES}
	fi
}

# main
RC_CONF_FILE=/etc/rc.conf
MAILER_CONF_FILE=/etc/mail/mailer.conf
SENDMAIL=/usr/sbin/sendmail
MAILQ=/usr/bin/mailq
NEWALIASES=/usr/bin/newaliases

disable_sendmail

if [ "$1" = "--force" ]; then
  force_enable_qmail
else
  enable_qmail
fi