# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=6

inherit autotools db-use eutils systemd user

# for betas
#MY_P=${P/_b/.B}
#S=${WORKDIR}/${PN}-2.8.0
#SRC_URI="mirror://sourceforge/opendkim/${MY_P}.tar.gz"

DESCRIPTION="A milter-based application to provide DKIM signing and verification"
HOMEPAGE="http://opendkim.org"
SRC_URI="mirror://sourceforge/opendkim/${P}.tar.gz"

LICENSE="Sendmail-Open-Source BSD"
SLOT="0"
KEYWORDS="amd64 ~arm x86"
IUSE="+berkdb gnutls ldap libressl lmdb lua memcached opendbx poll sasl selinux +ssl static-libs unbound"

DEPEND="|| ( mail-filter/libmilter mail-mta/sendmail )
	dev-libs/libbsd
	ssl? (
		!libressl? ( dev-libs/openssl:0= )
		libressl? ( dev-libs/libressl:0= )
	)
	berkdb? ( >=sys-libs/db-3.2:* )
	opendbx? ( >=dev-db/opendbx-1.4.0 )
	lua? ( dev-lang/lua:* )
	ldap? ( net-nds/openldap )
	lmdb? ( dev-db/lmdb )
	memcached? ( dev-libs/libmemcached )
	sasl? ( dev-libs/cyrus-sasl )
	unbound? ( >=net-dns/unbound-1.4.1 net-dns/dnssec-root )
	!unbound? ( net-libs/ldns )
	gnutls? ( >=net-libs/gnutls-3.3 )"

RDEPEND="${DEPEND}
	sys-process/psmisc
	selinux? ( sec-policy/selinux-dkim )
"

REQUIRED_USE="sasl? ( ldap )"

PATCHES=(
	"${FILESDIR}/${P}-gnutls-3.4.patch"
)

pkg_setup() {
	enewgroup milter
	# mail-milter/spamass-milter creates milter user with this home directory
	# For consistency reasons, milter user must be created here with this home directory
	# even though this package doesn't need a home directory for this user (#280571)
	enewuser milter -1 -1 /var/lib/milter milter
}

src_prepare() {
	default

	sed -i -e 's:/var/db/dkim:/etc/opendkim:g' \
	       -e 's:/var/db/opendkim:/var/lib/opendkim:g' \
	       -e 's:/etc/mail:/etc/opendkim:g' \
	       -e 's:mailnull:milter:g' \
	       -e 's:^#[[:space:]]*PidFile.*:PidFile /run/opendkim/opendkim.pid:' \
		   opendkim/opendkim.conf.sample opendkim/opendkim.conf.simple.in \
		   stats/opendkim-reportstats{,.in} || die

	sed -i -e 's:dist_doc_DATA:dist_html_DATA:' libopendkim/docs/Makefile.am \
		|| die

	sed -i -e '/sock.*mt.getcwd/s:mt.getcwd():"/tmp":' opendkim/tests/*.lua
	sed -i -e '/sock.*mt.getcwd/s:mt.getcwd():"/proc/self/cwd":' opendkim/tests/*.lua

	eautoreconf
}

src_configure() {
	local myconf=()
	if use berkdb ; then
		myconf+=(
			$(db_includedir)
			--with-db-incdir=${myconf#-I}
			--enable-popauth
			--enable-query_cache
			--enable-stats
		)
	fi
	if use unbound; then
		myconf+=( --with-unbound )
	else
		myconf+=( --with-ldns )
	fi
	if use ldap; then
		myconf+=( $(use_with sasl) )
	fi
	econf \
		$(use_with berkdb db) \
		$(use_with opendbx odbx) \
		$(use_with lua) \
		$(use_enable lua rbl) \
		$(use_with ldap openldap) \
		$(use_with lmdb) \
		$(use_enable poll) \
		$(use_enable static-libs static) \
		$(use_with gnutls) \
		$(use_with memcached libmemcached) \
		"${myconf[@]}" \
		--enable-filter \
		--enable-atps \
		--enable-identity_header \
		--enable-rate_limit \
		--enable-resign \
		--enable-replace_rules \
		--enable-default_sender \
		--enable-sender_macro \
		--enable-vbr \
		--disable-live-testing
		#--with-test-socket=/tmp/opendkim-$(echo ${RANDOM})-S
		#--disable-rpath
}

src_install() {
	default
	prune_libtool_files

	dosbin stats/opendkim-reportstats

	newinitd "${FILESDIR}/opendkim.init.r3" opendkim
	systemd_newunit "${FILESDIR}/opendkim-r1.service" opendkim.service

	dodir /etc/opendkim /var/lib/opendkim
	fowners milter:milter /var/lib/opendkim

	# default configuration
	if [ ! -f "${ROOT}"/etc/opendkim/opendkim.conf ]; then
		grep ^[^#] "${S}"/opendkim/opendkim.conf.simple \
			> "${D}"/etc/opendkim/opendkim.conf
		if use unbound; then
			echo TrustAnchorFile /etc/dnssec/root-anchors.txt >> "${D}"/etc/opendkim/opendkim.conf
		fi
		echo UserID milter >> "${D}"/etc/opendkim/opendkim.conf
		if use berkdb; then
			echo Statistics /var/lib/opendkim/stats.dat >> \
				"${D}"/etc/opendkim/opendkim.conf
		fi
	fi
}

pkg_postinst() {
	if [[ -z ${REPLACING_VERSION} ]]; then
		elog "If you want to sign your mail messages and need some help"
		elog "please run:"
		elog "  emerge --config ${CATEGORY}/${PN}"
		elog "It will help you create your key and give you hints on how"
		elog "to configure your DNS and MTA."

		ewarn "Make sure your MTA has r/w access to the socket file."
		ewarn "This can be done either by setting UMask to 002 and adding MTA's user"
		ewarn "to milter group or you can simply set UMask to 000."
	fi
}

pkg_config() {
	local selector keysize pubkey

	read -p "Enter the selector name (default ${HOSTNAME}): " selector
	[[ -n "${selector}" ]] || selector=${HOSTNAME}
	if [[ -z "${selector}" ]]; then
		eerror "Oddly enough, you don't have a HOSTNAME."
		return 1
	fi
	if [[ -f "${ROOT}"etc/opendkim/${selector}.private ]]; then
		ewarn "The private key for this selector already exists."
	else
		keysize=1024
		# generate the private and public keys
		opendkim-genkey -b ${keysize} -D "${ROOT}"etc/opendkim/ \
			-s ${selector} -d '(your domain)' && \
			chown milter:milter \
			"${ROOT}"etc/opendkim/"${selector}".private || \
				{ eerror "Failed to create private and public keys." ; return 1; }
		chmod go-r "${ROOT}"etc/opendkim/"${selector}".private
	fi

	# opendkim selector configuration
	echo
	einfo "Make sure you have the following settings in your /etc/opendkim/opendkim.conf:"
	einfo "  Keyfile /etc/opendkim/${selector}.private"
	einfo "  Selector ${selector}"

	# MTA configuration
	echo
	einfo "If you are using Postfix, add following lines to your main.cf:"
	einfo "  smtpd_milters     = unix:/var/run/opendkim/opendkim.sock"
	einfo "  non_smtpd_milters = unix:/var/run/opendkim/opendkim.sock"
	einfo "  and read http://www.postfix.org/MILTER_README.html"

	# DNS configuration
	einfo "After you configured your MTA, publish your key by adding this TXT record to your domain:"
	cat "${ROOT}"etc/opendkim/${selector}.txt
	einfo "t=y signifies you only test the DKIM on your domain. See following page for the complete list of tags:"
	einfo "  http://www.dkim.org/specs/rfc4871-dkimbase.html#key-text"
}