# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# genkernel-9999        -> latest Git branch "master"
# genkernel-VERSION     -> normal genkernel release

EAPI="7"

inherit bash-completion-r1

# Whenever you bump a GKPKG, check if you have to move
# or add new patches!
VERSION_BTRFS_PROGS="5.1.1"
VERSION_BUSYBOX="1.31.0"
VERSION_CRYPTSETUP="2.1.0"
VERSION_DMRAID="1.0.0.rc16-3"
VERSION_DROPBEAR="2019.78"
VERSION_EUDEV="3.2.8"
VERSION_E2FSPROGS="1.45.3"
VERSION_FUSE="2.9.9"
VERSION_GPG="1.4.23"
VERSION_ISCSI="2.0.875"
VERSION_JSON_C="0.13.1"
VERSION_LIBAIO="0.3.112"
VERSION_LIBGCRYPT="1.8.4"
VERSION_LIBGPGERROR="1.36"
VERSION_LVM="2.02.185"
VERSION_LZO="2.10"
VERSION_MDADM="4.1"
VERSION_MULTIPATH_TOOLS="0.8.0"
VERSION_POPT="1.16"
VERSION_STRACE="5.2"
VERSION_UNIONFS_FUSE="2.0"
VERSION_USERSPACE_RCU="0.10.2"
VERSION_UTIL_LINUX="2.34"
VERSION_XFSPROGS="5.1.0"
VERSION_ZLIB="1.2.11"
VERSION_ZSTD="1.4.0"

RH_HOME="ftp://sourceware.org/pub"
DM_HOME="https://people.redhat.com/~heinzm/sw/dmraid/src"
BB_HOME="https://busybox.net/downloads"

COMMON_URI="
	mirror://kernel/linux/kernel/people/kdave/btrfs-progs/btrfs-progs-v${VERSION_BTRFS_PROGS}.tar.xz
	https://www.busybox.net/downloads/busybox-${VERSION_BUSYBOX}.tar.bz2
	mirror://kernel/linux/utils/cryptsetup/v$(ver_cut 1-2 ${VERSION_CRYPTSETUP})/cryptsetup-${VERSION_CRYPTSETUP}.tar.xz
	https://people.redhat.com/~heinzm/sw/dmraid/src/dmraid-${VERSION_DMRAID}.tar.bz2
	https://matt.ucc.asn.au/dropbear/releases/dropbear-${VERSION_DROPBEAR}.tar.bz2
	https://dev.gentoo.org/~blueness/eudev/eudev-${VERSION_EUDEV}.tar.gz
	mirror://kernel/linux/kernel/people/tytso/e2fsprogs/v${VERSION_E2FSPROGS}/e2fsprogs-${VERSION_E2FSPROGS}.tar.xz
	https://github.com/libfuse/libfuse/releases/download/fuse-${VERSION_FUSE}/fuse-${VERSION_FUSE}.tar.gz
	mirror://gnupg/gnupg/gnupg-${VERSION_GPG}.tar.bz2
	https://github.com/open-iscsi/open-iscsi/archive/${VERSION_ISCSI}.tar.gz -> open-iscsi-${VERSION_ISCSI}.tar.gz
	https://s3.amazonaws.com/json-c_releases/releases/json-c-${VERSION_JSON_C}.tar.gz
	https://releases.pagure.org/libaio/libaio-${VERSION_LIBAIO}.tar.gz
	mirror://gnupg/libgcrypt/libgcrypt-${VERSION_LIBGCRYPT}.tar.bz2
	mirror://gnupg/libgpg-error/libgpg-error-${VERSION_LIBGPGERROR}.tar.bz2
	https://mirrors.kernel.org/sourceware/lvm2/LVM2.${VERSION_LVM}.tgz
	https://www.oberhumer.com/opensource/lzo/download/lzo-${VERSION_LZO}.tar.gz
	mirror://kernel/linux/utils/raid/mdadm/mdadm-${VERSION_MDADM}.tar.xz
	https://git.opensvc.com/?p=multipath-tools/.git;a=snapshot;h=${VERSION_MULTIPATH_TOOLS};sf=tgz -> multipath-tools-${VERSION_MULTIPATH_TOOLS}.tar.gz
	http://ftp.rpm.org/mirror/popt/popt-${VERSION_POPT}.tar.gz
	https://github.com/strace/strace/releases/download/v${VERSION_STRACE}/strace-${VERSION_STRACE}.tar.xz
	https://github.com/rpodgorny/unionfs-fuse/archive/v${VERSION_UNIONFS_FUSE}.tar.gz -> unionfs-fuse-${VERSION_UNIONFS_FUSE}.tar.gz
	https://lttng.org/files/urcu/userspace-rcu-${VERSION_USERSPACE_RCU}.tar.bz2
	mirror://kernel/linux/utils/util-linux/v${VERSION_UTIL_LINUX:0:4}/util-linux-${VERSION_UTIL_LINUX}.tar.xz
	mirror://kernel/linux/utils/fs/xfs/xfsprogs/xfsprogs-${VERSION_XFSPROGS}.tar.xz
	https://zlib.net/zlib-${VERSION_ZLIB}.tar.gz
	https://github.com/facebook/zstd/archive/v${VERSION_ZSTD}.tar.gz -> zstd-${VERSION_ZSTD}.tar.gz
"

if [[ ${PV} == 9999* ]] ; then
	EGIT_REPO_URI="https://anongit.gentoo.org/git/proj/${PN}.git"
	inherit git-r3
	S="${WORKDIR}/${P}"
	SRC_URI="${COMMON_URI}"
else
	SRC_URI="mirror://gentoo/${P}.tar.xz
		${COMMON_URI}"
	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86"
fi

DESCRIPTION="Gentoo automatic kernel building scripts"
HOMEPAGE="https://www.gentoo.org"

LICENSE="GPL-2"
SLOT="0"
RESTRICT=""
IUSE="ibm +firmware"

# Note:
# We need sys-devel/* deps like autoconf or automake at _runtime_
# because genkernel will usually build things like LVM2, cryptsetup,
# mdadm... during initramfs generation which will require these
# things.
DEPEND=""
RDEPEND="${DEPEND}
	app-arch/cpio
	>=app-misc/pax-utils-1.2.2
	app-portage/elt-patches
	sys-apps/sandbox
	sys-devel/autoconf
	sys-devel/autoconf-archive
	sys-devel/automake
	sys-devel/libtool
	virtual/pkgconfig
	firmware? ( sys-kernel/linux-firmware )
	!<sys-apps/openrc-0.9.9"

if [[ ${PV} == 9999* ]]; then
	DEPEND="${DEPEND} app-text/asciidoc"
fi

src_unpack() {
	if [[ ${PV} == 9999* ]]; then
		git-r3_src_unpack
	else
		local gk_src_file
		for gk_src_file in ${A} ; do
			if [[ ${gk_src_file} == genkernel-* ]] ; then
				unpack "${gk_src_file}"
			fi
		done
	fi
}

src_prepare() {
	default

	if [[ ${PV} == 9999* ]] ; then
		einfo "Updating version tag"
		GK_V="$(git describe --tags | sed 's:^v::')-git"
		sed "/^GK_V/s,=.*,='${GK_V}',g" -i "${S}"/genkernel
		einfo "Producing ChangeLog from Git history..."
		pushd "${S}/.git" >/dev/null || die
		git log > "${S}"/ChangeLog || die
		popd >/dev/null || die
	fi

	# Update software.sh
	sed -i \
		-e "s:VERSION_BTRFS_PROGS:${VERSION_BTRFS_PROGS}:"\
		-e "s:VERSION_BUSYBOX:${VERSION_BUSYBOX}:"\
		-e "s:VERSION_CRYPTSETUP:${VERSION_CRYPTSETUP}:"\
		-e "s:VERSION_DMRAID:${VERSION_DMRAID}:"\
		-e "s:VERSION_DROPBEAR:${VERSION_DROPBEAR}:"\
		-e "s:VERSION_EUDEV:${VERSION_EUDEV}:"\
		-e "s:VERSION_E2FSPROGS:${VERSION_E2FSPROGS}:"\
		-e "s:VERSION_FUSE:${VERSION_FUSE}:"\
		-e "s:VERSION_GPG:${VERSION_GPG}:"\
		-e "s:VERSION_ISCSI:${VERSION_ISCSI}:"\
		-e "s:VERSION_JSON_C:${VERSION_JSON_C}:"\
		-e "s:VERSION_LIBAIO:${VERSION_LIBAIO}:"\
		-e "s:VERSION_LIBGCRYPT:${VERSION_LIBGCRYPT}:"\
		-e "s:VERSION_LIBGPGERROR:${VERSION_LIBGPGERROR}:"\
		-e "s:VERSION_LVM:${VERSION_LVM}:"\
		-e "s:VERSION_LZO:${VERSION_LZO}:"\
		-e "s:VERSION_MDADM:${VERSION_MDADM}:"\
		-e "s:VERSION_MULTIPATH_TOOLS:${VERSION_MULTIPATH_TOOLS}:"\
		-e "s:VERSION_POPT:${VERSION_POPT}:"\
		-e "s:VERSION_STRACE:${VERSION_STRACE}:"\
		-e "s:VERSION_UNIONFS_FUSE:${VERSION_UNIONFS_FUSE}:"\
		-e "s:VERSION_USERSPACE_RCU:${VERSION_USERSPACE_RCU}:"\
		-e "s:VERSION_UTIL_LINUX:${VERSION_UTIL_LINUX}:"\
		-e "s:VERSION_XFSPROGS:${VERSION_XFSPROGS}:"\
		-e "s:VERSION_ZLIB:${VERSION_ZLIB}:"\
		-e "s:VERSION_ZSTD:${VERSION_ZSTD}:"\
		"${S}"/defaults/software.sh \
		|| die "Could not adjust versions"
}

src_compile() {
	if [[ ${PV} == 9999* ]] ; then
		emake
	fi
}

src_install() {
	insinto /etc
	doins "${S}"/genkernel.conf

	doman genkernel.8
	dodoc AUTHORS ChangeLog README TODO
	dobin genkernel
	rm -f genkernel genkernel.8 AUTHORS ChangeLog README TODO genkernel.conf

	if use ibm ; then
		cp "${S}"/arch/ppc64/kernel-2.6{-pSeries,} || die
	else
		cp "${S}"/arch/ppc64/kernel-2.6{.g5,} || die
	fi

	insinto /usr/share/genkernel
	doins -r "${S}"/*

	fperms +x /usr/share/genkernel/gen_worker.sh

	newbashcomp "${FILESDIR}"/genkernel-4.bash "${PN}"
	insinto /etc
	doins "${FILESDIR}"/initramfs.mounts

	pushd "${DISTDIR}" &>/dev/null || die
	insinto /usr/share/genkernel/distfiles
	doins ${A/${P}.tar.xz/}
	popd &>/dev/null || die
}

pkg_postinst() {
	# Wiki is out of date
	#echo
	#elog 'Documentation is available in the genkernel manual page'
	#elog 'as well as the following URL:'
	#echo
	#elog 'https://wiki.gentoo.org/wiki/Genkernel'
	#echo

	local replacing_version
	for replacing_version in ${REPLACING_VERSIONS} ; do
		if ver_test "${replacing_version}" -lt 4 ; then
			# This is an upgrade which requires user review

			ewarn ""
			ewarn "Genkernel v4.x is a new major release which touches"
			ewarn "nearly everything. Be careful, read updated manpage"
			ewarn "and pay special attention to program output regarding"
			ewarn "changed kernel command-line parameters!"

			# Show this elog only once
			break
		fi
	done

	# Show special warning for users depending on remote unlock capabilities
	local gk_config="${EROOT%/}/etc/genkernel.conf"
	if [[ -f "${gk_config}" ]] ; then
		if grep -q -E "^SSH=[\"\']?yes" "${gk_config}" 2>/dev/null ; then
			if ! grep -q dosshd /proc/cmdline 2>/dev/null ; then
				ewarn ""
				ewarn "IMPORTANT: SSH is currently enabled in your genkernel config"
				ewarn "file (${gk_config}). However, 'dosshd' is missing from current"
				ewarn "kernel command-line. You MUST add 'dosshd' to keep sshd enabled"
				ewarn "in genkernel v4+ initramfs!"
			fi
		fi

		if grep -q -E "^CMD_CALLBACK=.*emerge.*@module-rebuild" "${gk_config}" 2>/dev/null ; then
			elog ""
			elog "Please remove 'emerge @module-rebuild' from genkernel config"
			elog "file (${gk_config}) and make use of new MODULEREBUILD option"
			elog "instead."
		fi
	fi
}