# Distributed under the terms of the GNU General Public License v2

EAPI=7
inherit systemd tmpfiles toolchain-funcs

DESCRIPTION="NTP client and server programs"
HOMEPAGE="https://chrony.tuxfamily.org/"
SRC_URI="https://download.tuxfamily.org/${PN}/${P/_/-}.tar.gz"
LICENSE="GPL-2"
SLOT="0"

KEYWORDS="*"
IUSE="caps +cmdmon html ipv6 libedit +ntp +phc pps readline +refclock +rtc seccomp selinux +adns nettle sechash samba"
REQUIRED_USE="
        ?? ( libedit readline )
"

CDEPEND="
        caps? ( sys-libs/libcap )
        libedit? ( dev-libs/libedit )
	nettle? ( dev-libs/nettle:= )
        seccomp? ( sys-libs/libseccomp )
"
DEPEND="
        ${CDEPEND}
        html? ( dev-ruby/asciidoctor )
        pps? ( net-misc/pps-tools )
"
RDEPEND="
        ${CDEPEND}
        selinux? ( sec-policy/selinux-chronyd )
"

RESTRICT=test

S="${WORKDIR}/${P/_/-}"

#PATCHES=(
#       "${FILESDIR}"/${PN}-3.5-systemd-gentoo.patch
#)

src_prepare() {
        default
        sed -i \
                -e 's:/etc/chrony\.conf:/etc/chrony/chrony.conf:g' \
                doc/* examples/* || die
}

src_configure() {
        tc-export CC

        local CHRONY_EDITLINE
        # ./configure legend:
        # --disable-readline : disable line editing entirely
        # --without-readline : do not use sys-libs/readline (enabled by default)
        # --without-editline : do not use dev-libs/libedit (enabled by default)
        if ! use readline && ! use libedit; then
                CHRONY_EDITLINE='--disable-readline'
        else
                CHRONY_EDITLINE+=" $(usex readline '' --without-readline)"
                CHRONY_EDITLINE+=" $(usex libedit '' --without-editline)"
        fi

        #--without-nettle       Don't use nettle even if it is available
        #--disable-privdrop     Disable support for dropping root privileges
        #--without-libcap       Don't use libcap even if it is available
        #--enable-scfilter      Enable support for system call filtering
        #--without-seccomp      Don't use seccomp even if it is available
        #--without-clock-gettime Don't use clock_gettime() even if it is available
        #--disable-timestamping Disable support for SW/HW timestamping
        #--with-ntp-era=SECONDS Specify earliest assumed NTP time in seconds

        # not an autotools generated script
        local CHRONY_CONFIGURE="
        ./configure \
                $(use_enable seccomp scfilter) \
                $(usex adns '' --disable-asyncdns) \
                $(usex caps '' --disable-linuxcaps) \
                $(usex cmdmon '' --disable-cmdmon) \
                $(usex ipv6 '' --disable-ipv6) \
                $(usex ntp '' --disable-ntp) \
                $(usex phc '' --disable-phc) \
                $(usex pps '' --disable-pps) \
                $(usex refclock '' --disable-refclock) \
                $(usex rtc '' --disable-rtc) \
                $(usex sechash '' --disable-sechash) \
                $(use samba --enable-ntp-signd) \
                ${CHRONY_EDITLINE} \
                ${EXTRA_ECONF} \
                --chronysockdir=/run/chrony \
                --docdir=/usr/share/doc/${PF} \
                --mandir=/usr/share/man \
                --prefix=/usr \
                --sysconfdir=/etc/chrony \
                --with-pidfile="${EPREFIX}/run/chrony/chronyd.pid"
                --without-nss \
                --without-tomcrypt
        "

        # print the ./configure call to aid in future debugging
        einfo ${CHRONY_CONFIGURE}
        bash ${CHRONY_CONFIGURE} || die
}

src_compile() {
        emake all docs $(usex html '' 'ADOC=true')
}

src_install() {
        default

        newinitd "${FILESDIR}"/chronyd.init-r2 chronyd
        newconfd "${FILESDIR}"/chronyd.conf chronyd

        insinto /etc/${PN}
        newins "${FILESDIR}"/chrony.conf chrony.conf

        docinto examples
        dodoc examples/*.example*

	newtmpfiles - chronyd.conf <<<"d /run/chrony 0750 $(usex caps 'ntp ntp' 'root root')"
        if use html; then
                docinto html
                dodoc doc/*.html
        fi

        keepdir /var/{lib,log}/chrony

	if use caps; then
		# Prepare a directory for the chrony.drift file (a la ntpsec)
		# Ensures the environment is sane on new installs
		fowners ntp:ntp /var/{lib,log}/chrony
		fperms 770 /var/lib/chrony
	fi

        insinto /etc/logrotate.d
        newins "${FILESDIR}"/chrony-2.4-r1.logrotate chrony

	systemd_dounit examples/chronyd.service
	systemd_dounit examples/chrony-wait.service
	systemd_enable_ntpunit 50-chrony chronyd.service
}

pkg_preinst() {
	HAD_CAPS=false

	if has_version 'net-misc/chrony[caps]'; then
		HAD_CAPS=true
	fi
}

pkg_postinst() {
	tmpfiles_process chronyd.conf

	if [[ -n ${REPLACING_VERSIONS} ]] && use caps && ! ${HAD_CAPS}; then
		ewarn "Please adjust permissions on ${EROOT}/var/{lib,log}/chrony to be owned by ntp:ntp"
		ewarn "e.g. chown -R ntp:ntp ${EROOT}/var/{lib,log}/chrony"
		ewarn "This is necessary for chrony to drop privileges"
	fi

	ewarn "If You use Chrony in LXD"
        ewarn "Please add -x to ARG in /etc/conf.d/chronyd"


}