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

# @ECLASS: rpm-extended.eclass
# @MAINTAINER:
# Andrew Ammerlaan <andrewammerlaan@gentoo.org>
# @AUTHOR:
# Andrew Ammerlaan <andrewammerlaan@gentoo.org>
# Extension of the rpm.eclass by Alastair Tse <liquidx@gentoo.org>
# @SUPPORTED_EAPIS: 7 8
# @BLURB: An eclass that helps automating the creation of ebuilds for software only distributed through rpm
# @DESCRIPTION:
# This extends the rpm eclass to also installs *all* files in the rpm, and
# extracts post/pre(un)install scripts and runs them.
#
# This is mostly useful when creating ebuilds for rpm files in bulk. In cases
# where it is not doable to write a Gentoo specific src_install and
# pkg_post/pre/install/rm functions for each ebuild.

# The rpm eclass provides the pkg_unpack function we need
inherit rpm

case "${EAPI:-0}" in
	0|1|2|3|4|5|6)
		die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
		;;
	7|8)
		;;
	*)
		die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
		;;
esac

if [[ -z ${_RPM_EXTENDED_ECLASS} ]] ; then
_RPM_EXTENDED_ECLASS=1

if [[ ${EAPI} != 7 ]]; then
	# Need rpm to extract scripts, we also need it in the pkg_rm phases so it
	# has to be both BDEPEND and RDEPEND
	BDEPEND="app-arch/rpm"
	RDEPEND="app-arch/rpm"
else
	IDEPEND="app-arch/rpm"
fi

# Otherwise we get the S does not exist error
S="${WORKDIR}"
# Everything in the rpm is prebuilt
QA_PREBUILT="*"
# Distributing binaries of rpm packages makes no sense and it will likely not
# work, as the pkg_pre/post/inst/rm phases will likely fail to extract the
# script from  the rpm file, since this is not guaranteed to exist for binpkgs
RESTRICT="bindist"

# @ECLASS_VARIABLE: RPM_SCRIPT_RUNNER
# @DESCRIPTION:
# Set which shell should run the rpm pre/post(un)install scripts. Defaults to
# bash, can include extra arguments.
: ${RPM_SCRIPT_RUNNER:="bash"}

# @FUNCTION: rpm-extended_src_compile
# @DESCRIPTION:
# As everything in the rpm file is prebuilt we do not need to compile anything,
# therefore we add an empty src_compile function to avoid errors.
rpm-extended_src_compile() {
	# Nothing to do here
	return
}

# @FUNCTION: rpm-extended_src_install
# @DESCRIPTION:
# The rpm has been extracted by the pkg_unpack function from rpm.eclass. Now we
# just copy everything over to the image directory, while preserving
# permissions. If something is installed to /usr/share/doc we move everything
# in there to the correct Gentoo specific location: /usr/share/doc/${PF}
rpm-extended_src_install() {
	cp -a "${S}"/* "${ED}"
	if [ -d "${ED}/usr/share/doc/" ]; then
		# If this package contains docs, move to gentoo specific dir
		mkdir "${ED}/usr/share/doc/${PF}" || die
		for file in "${ED}/usr/share/doc"/* ; do
			if [[ "${file}" == "${ED}/usr/share/doc/${PF}" ]]; then
				continue
			fi
			mv "${file}" "${ED}/usr/share/doc/${PF}" || die
		done
	fi
}

# @FUNCTION: rpm-extended_pkg_preinst
# @DESCRIPTION:
# Some rpm files contain a preinstall script, we extract this script, write it
# to a file and execute it in the correct phase
rpm-extended_pkg_preinst() {
	for x in ${A}; do
		rpm -qp --scripts "${DISTDIR}/${x}" | sed -n -E '/^preinstall/,/^postinstall|^preuninstall|^postuninstall|^verify/{//!p;}' > "preinst-${x}.sh"
		chmod +x "preinst-${x}.sh"
		${RPM_SCRIPT_RUNNER} "preinst-${x}.sh"
	done
}

# @FUNCTION: rpm-extended_pkg_postinst
# @DESCRIPTION:
# Some rpm files contain a postinstall script, we extract this script, write it
# to a file and execute it in the correct phase
rpm-extended_pkg_postinst() {
	for x in ${A}; do
		rpm -qp --scripts "${DISTDIR}/${x}" | sed -n -E '/^postinstall/,/^preuninstall|^postuninstall|^verify|^preinstall/{//!p;}' > "postinst-${x}.sh"
		chmod +x "postinst-${x}.sh"
		${RPM_SCRIPT_RUNNER} "postinst-${x}.sh"
	done
}

# @FUNCTION: rpm-extended_pkg_prerm
# @DESCRIPTION:
# Some rpm files contain a preuninstall script, we extract this script, write it
# to a file and execute it in the correct phase
rpm-extended_pkg_prerm() {
	for x in ${A}; do
		rpm -qp --scripts "${DISTDIR}/${x}" | sed -n -E '/^preuninstall/,/^postuninstall|^verify|^preinstall|^postinstall/{//!p;}' > "prerm-${x}.sh"
		chmod +x "prerm-${x}.sh"
		${RPM_SCRIPT_RUNNER} "prerm-${x}.sh"
	done
}

# @FUNCTION: rpm-extended_pkg_postrm
# @DESCRIPTION:
# Some rpm files contain a postuninstall script, we extract this script, write
# it to a file and execute it in the correct phase
rpm-extended_pkg_postrm() {
	for x in ${A}; do
		rpm -qp --scripts "${DISTDIR}/${x}" | sed -n -E '/^postuninstall/,/^verify|^preinstall|^postinstall|^preuninstall/{//!p;}' > "postrm-${x}.sh"
		chmod +x "postrm-${x}.sh"
		${RPM_SCRIPT_RUNNER} "postrm-${x}.sh"
	done
}

EXPORT_FUNCTIONS src_compile src_install pkg_preinst pkg_postinst pkg_prerm pkg_postrm

fi