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# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit autotools systemd

DESCRIPTION="Export command line tools to a web based terminal emulator"
HOMEPAGE="https://github.com/shellinabox/shellinabox"
SRC_URI="https://github.com/${PN}/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="amd64 ppc ppc64 x86"
IUSE="+pam"

RDEPEND="
	acct-user/shellinaboxd
	acct-group/shellinaboxd"

DEPEND="
	${RDEPEND}
	dev-libs/openssl:0=
	pam? ( sys-libs/pam )"

SIAB_CERT_DIR="/etc/shellinabox/cert"
SIAB_SSL_BASH="${SIAB_CERT_DIR}/gen_ssl_cert.bash"
SIAB_DAEMON="${PN}d"

shellinbox_gen_ssl_setup() {
	read -r -d '' SIAB_SSL_SETUP << EOF
cd ${SIAB_CERT_DIR}
openssl genrsa -des3 -out server.key 1024
openssl req -new -key server.key -out server.csr
cp server.key server.key.org
openssl rsa -in server.key.org -out server.key
openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt
cat server.crt server.key > certificate.pem
EOF
}

src_prepare() {
	default
	eautoreconf
}

src_configure() {
	local myeconf=(
		--disable-runtime-loading
		--enable-ssl
	)

	econf \
		$(use_enable pam) \
		"${myeconf[@]}"
}

src_install() {
	emake DESTDIR="${D}" install

	# make installs the binary in bin...
	rm -rf "${D}/usr/bin" || die

	# ... whereas it should put it in sbin.
	dosbin "${SIAB_DAEMON}"

	# Install init+conf files.
	newinitd "${FILESDIR}/${SIAB_DAEMON}.init" "${SIAB_DAEMON}"
	newconfd "${FILESDIR}/${SIAB_DAEMON}.conf" "${SIAB_DAEMON}"

	# Install systemd unit file.
	systemd_dounit "${FILESDIR}"/shellinaboxd.service

	# Install CSS files.
	insinto "/usr/share/${PN}-resources"
	doins -r "${PN}"/*.css

	# Create directory where SSL certificates will be generated.
	dodir "${SIAB_CERT_DIR}"

	# Generate set up variable.
	shellinbox_gen_ssl_setup

	# Dump it in a bash script.
	echo "#!/usr/bin/env bash" > "${D}/${SIAB_SSL_BASH}" || die
	echo "${SIAB_SSL_SETUP}" >> "${D}/${SIAB_SSL_BASH}" || die
	chmod +x "${D}/${SIAB_SSL_BASH}" || die
}

pkg_postinst() {
	ewarn
	ewarn "The default configuration exposes a login shell"
	ewarn "with SSL disabled on the localhost interface only."
	ewarn

	shellinbox_gen_ssl_setup

	einfo
	einfo "To generate self-signed SSL certificates"
	einfo "please read the procedure explained here:"
	einfo "https://code.google.com/p/shellinabox/issues/detail?id=59#c15"
	einfo
	einfo "${SIAB_SSL_SETUP}"
	einfo
	einfo "This walkthrough has been written in ${SIAB_SSL_BASH} for your convenience."
	einfo "Make sure to execute this script."
	einfo
}