# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit cmake pam systemd

DESCRIPTION="Simple Login Manager resurrected"
HOMEPAGE="https://slim-fork.sourceforge.io/"
SRC_URI="mirror://sourceforge/project/${PN}-fork/${P}.tar.gz"
KEYWORDS="~amd64 ~arm ~arm64 ~mips ~ppc ~ppc64 ~sparc x86"

LICENSE="GPL-2"
SLOT="0"
IUSE="branding pam"

RDEPEND="
	media-libs/libjpeg-turbo:=
	media-libs/libpng:0=
	pam? ( sys-libs/pam )
	x11-apps/sessreg
	x11-libs/libX11
	x11-libs/libXft
	x11-libs/libXmu
	x11-libs/libXpm
	x11-libs/libXrandr
"
DEPEND="${RDEPEND}
	x11-base/xorg-proto
"
BDEPEND="virtual/pkgconfig"
PDEPEND="branding? ( >=x11-themes/slim-themes-1.2.3a-r3 )"

PATCHES=(
	# Our Gentoo-specific config changes
	"${FILESDIR}"/slim-1.4.0-config.patch
	"${FILESDIR}"/slim-1.4.1-pam.patch
)

src_prepare() {
	cmake_src_prepare

	if use branding; then
		sed -i -e '/current_theme/s/default/slim-gentoo-simple/' slim.conf || die
	fi
}

src_configure() {
	local mycmakeargs=(
		-DUSE_PAM=$(usex pam)
		-DUSE_CONSOLEKIT=OFF
	)

	cmake_src_configure
}

src_install() {
	cmake_src_install

	if use pam ; then
		pamd_mimic system-local-login slim auth account session
		pamd_mimic system-local-login slimlock auth
	fi

	systemd_dounit slim.service

	insinto /usr/share/slim
	newins "${FILESDIR}/Xsession-r3" Xsession

	insinto /etc/logrotate.d
	newins "${FILESDIR}/slim.logrotate" slim

	dodoc xinitrc.sample ChangeLog README TODO THEMES
}

pkg_postinst() {
	# massage ${REPLACING_VERSIONS} to come up with whether or not it's a
	# new install or if it's older than 1.3.2-r7
	# Note - there should only ever be zero or one version as this package
	# isn't slotted, so the logic doesn't worry about what happens if there
	# are two, due to the case where a previous emerge attempt failed in
	# the middle of qmerge.
	local rv=none
	for rv in ${REPLACING_VERSIONS} ; do
		if ver_test "1.3.2-r7" -le "${rv}" ; then
			rv=newer
			break;
		fi

		if ver_test "1.0" -le "${rv}"  ; then
			rv=older
			break;
		fi
	done

	if [[ ${rv} == none ]]; then
		elog
		elog "The configuration file is located at /etc/slim.conf."
		elog
		elog "If you wish ${PN} to start automatically, set DISPLAYMANAGER=\"${PN}\" "
		elog "in /etc/conf.d/xdm and run \"rc-update add xdm default\"."
	fi
	if [[ ${rv} != newer ]]; then
		elog
		elog "By default, ${PN} is set up to do proper X session selection, including ~/.xsession"
		elog "support, as well as selection between sessions available in"
		elog "/etc/X11/Sessions/ at login by pressing [F1]."
		elog
		elog "The XSESSION environment variable is still supported as a default"
		elog "if no session has been specified by the user."
		elog
		elog "If you want to use .xinitrc in the user's home directory for session"
		elog "management instead, see README and xinitrc.sample in"
		elog "/usr/share/doc/${PF} and change your login_cmd in /etc/slim.conf"
		elog "accordingly."
		elog
	fi

	if ! use pam; then
		elog "You have merged ${PN} without USE=\"pam\", this will cause ${PN} to fall back to"
		elog "the console when restarting your window manager. If this is not desired, then"
		elog "please remerge ${PN} with USE=\"pam\""
		elog
	fi
}