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

EAPI=6

PYTHON_COMPAT=( python{2_7,3_{5,6,7}} pypy )
PYTHON_REQ_USE='bzip2(+),threads(+)'

inherit distutils-r1

DESCRIPTION="Fork of Portage focused on cleaning up and useful features"
HOMEPAGE="https://github.com/mgorny/portage-mgorny"
SRC_URI="https://github.com/mgorny/portage-mgorny/archive/v${PV}.tar.gz -> ${P}.tar.gz"

LICENSE="GPL-2"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86 ~amd64-fbsd"
SLOT="0"
IUSE="build +ipc +native-extensions selinux xattr kernel_linux"

DEPEND="!build? ( $(python_gen_impl_dep 'ssl(+)') )
	>=app-arch/tar-1.27
	>=sys-apps/sed-4.0.5
	sys-devel/patch"
RDEPEND="
	>=app-arch/tar-1.27
	!build? (
		>=app-admin/eselect-1.2
		app-crypt/openpgp-keys-gentoo-release
		>=app-crypt/gnupg-2.2.4-r2[ssl(-)]
		>=app-portage/gemato-10[${PYTHON_USEDEP}]
		app-shells/bash:0[readline]
		$(python_gen_cond_dep 'dev-python/pyblake2[${PYTHON_USEDEP}]' \
			python{2_7,3_4,3_5} pypy)
		>=dev-python/lxml-3.6.0[${PYTHON_USEDEP}]
		>=sys-apps/sed-4.0.5
	)
	elibc_FreeBSD? ( sys-freebsd/freebsd-bin )
	elibc_glibc? ( >=sys-apps/sandbox-2.2 )
	elibc_musl? ( >=sys-apps/sandbox-2.2 )
	elibc_uclibc? ( >=sys-apps/sandbox-2.2 )
	>=app-misc/pax-utils-0.1.17
	selinux? ( >=sys-libs/libselinux-2.0.94[python,${PYTHON_USEDEP}] )
	xattr? ( kernel_linux? (
		>=sys-apps/install-xattr-0.3
		$(python_gen_cond_dep 'dev-python/pyxattr[${PYTHON_USEDEP}]' \
			python2_7 pypy)
	) )
	!app-portage/repoman
	!sys-apps/portage"
PDEPEND="
	!build? (
		>=net-misc/rsync-2.6.4
	)"
# NOTE: FEATURES=installsources requires debugedit and rsync

pkg_pretend() {
	if [[ -f ${EROOT%/}/etc/make.conf ]]; then
		eerror "You seem to be using /etc/make.conf. Please migrate to the new"
		eerror "/etc/portage/make.conf location before upgrading."
		if [[ ! -f ${EROOT%/}/etc/portage/make.conf ]]; then
			eerror
			eerror "  mv ${EROOT%/}/etc/make.conf ${EROOT%/}/etc/portage/make.conf"
		else
			ewarn
			ewarn "WARNING: You seem to have make.conf in both locations. Please take"
			ewarn "care not to accientally overwrite one with the other."
		fi
		die "${EROOT%/}/etc/make.conf present"
	fi

	if [[ -f ${EROOT%/}/etc/portage/package.keywords ]]; then
		eerror "You seem to be using /etc/portage/package.keywords. Please migrate"
		eerror "to the new /etc/portage/package.accept_keywords location before"
		eerror "upgrading."
		eerror
		if [[ -d ${EROOT%/}/etc/portage/package.accept_keywords ]]; then
			eerror "  mv ${EROOT%/}/etc/portage/package.keywords ${EROOT%/}/etc/portage/package.accept_keywords/99old"
		else
			if [[ -f ${EROOT%/}/etc/portage/package.accept_keywords ]]; then
				eerror "  cat ${EROOT%/}/etc/portage/package.accept_keywords >> ${EROOT%/}/etc/portage/package.keywords"
			fi
			eerror "  mv ${EROOT%/}/etc/portage/package.keywords ${EROOT%/}/etc/portage/package.accept_keywords"
		fi
		die "${EROOT%/}/etc/portage/package.keywords present"
	fi

	if has_version sys-apps/portage; then
		ewarn "If you are migrating from sys-apps/portage to sys-apps/portage-mgorny,"
		ewarn "please note that Portage will abort upon having to unmerge itself."
		ewarn "However, sys-apps/portage-mgorny will already be installed at this"
		ewarn "point, so you simply have to restart emerge and it will successfully"
		ewarn "clean the old package afterwards."
		ewarn
		ewarn "If you did not use '--dynamic-deps n' in Portage, your VDB dependency"
		ewarn "graph is probably broken. You may need to use '--changed-deps y'"
		ewarn "for your first @world upgrade to resolve the conflicts. Afterwards,"
		ewarn "--changed-deps should no longer be necessary and any conflicts"
		ewarn "introduced afterwards should be reported to bugs.gentoo.org."
	fi
}

python_prepare_all() {
	distutils-r1_python_prepare_all

	if ! use ipc ; then
		einfo "Disabling ipc..."
		sed -e "s:_enable_ipc_daemon = True:_enable_ipc_daemon = False:" \
			-i lib/_emerge/AbstractEbuildProcess.py ||
			die "failed to patch AbstractEbuildProcess.py"
	fi

	if use xattr && use kernel_linux ; then
		einfo "Adding FEATURES=xattr to make.globals ..."
		echo -e '\nFEATURES="${FEATURES} xattr"' >> cnf/make.globals \
			|| die "failed to append to make.globals"
	fi

	if [[ -n ${EPREFIX} ]] ; then
		einfo "Setting portage.const.EPREFIX ..."
		sed -e "s|^\(SANDBOX_BINARY[[:space:]]*=[[:space:]]*\"\)\(/usr/bin/sandbox\"\)|\\1${EPREFIX}\\2|" \
			-e "s|^\(FAKEROOT_BINARY[[:space:]]*=[[:space:]]*\"\)\(/usr/bin/fakeroot\"\)|\\1${EPREFIX}\\2|" \
			-e "s|^\(BASH_BINARY[[:space:]]*=[[:space:]]*\"\)\(/bin/bash\"\)|\\1${EPREFIX}\\2|" \
			-e "s|^\(MOVE_BINARY[[:space:]]*=[[:space:]]*\"\)\(/bin/mv\"\)|\\1${EPREFIX}\\2|" \
			-e "s|^\(PRELINK_BINARY[[:space:]]*=[[:space:]]*\"\)\(/usr/sbin/prelink\"\)|\\1${EPREFIX}\\2|" \
			-e "s|^\(EPREFIX[[:space:]]*=[[:space:]]*\"\).*|\\1${EPREFIX}\"|" \
			-i lib/portage/const.py ||
			die "Failed to patch portage.const.EPREFIX"

		einfo "Prefixing shebangs ..."
		while read -r -d $'\0' ; do
			local shebang=$(head -n1 "${REPLY}")
			if [[ ${shebang} == "#!"* && ! ${shebang} == "#!${EPREFIX}/"* ]] ; then
				sed -i -e "1s:.*:#!${EPREFIX}${shebang:2}:" "${REPLY}" ||
					die "sed failed"
			fi
		done < <(find . -type f -print0)

		einfo "Adjusting make.globals ..."
		sed -e "s|\(/usr/portage\)|${EPREFIX}\\1|" \
			-e "s|^\(PORTAGE_TMPDIR=\"\)\(/var/tmp\"\)|\\1${EPREFIX}\\2|" \
			-i cnf/make.globals || die "sed failed"

		einfo "Adjusting repos.conf ..."
		sed -e "s|^\(location = \)\(/usr/portage\)|\\1${EPREFIX}\\2|" \
			-e "s|^\(sync-openpgp-key-path = \)\(.*\)|\\1${EPREFIX}\\2|" \
			-i cnf/repos.conf || die "sed failed"
		if prefix-guest ; then
			sed -e "s|^\(main-repo = \).*|\\1gentoo_prefix|" \
				-e "s|^\\[gentoo\\]|[gentoo_prefix]|" \
				-e "s|^\(sync-uri = \).*|\\1rsync://rsync.prefix.bitzolder.nl/gentoo-portage-prefix|" \
				-i cnf/repos.conf || die "sed failed"
		fi

		einfo "Adding FEATURES=force-prefix to make.globals ..."
		echo -e '\nFEATURES="${FEATURES} force-prefix"' >> cnf/make.globals \
			|| die "failed to append to make.globals"
	fi

	cd "${S}/cnf" || die
	if [[ -f make.conf.example.${ARCH}.diff ]]; then
		patch make.conf.example "make.conf.example.${ARCH}.diff" ||
			die "Failed to patch make.conf.example"
	else
		eerror ""
		eerror "Portage does not have an arch-specific configuration for this arch."
		eerror "Please notify the arch maintainer about this issue. Using generic."
		eerror ""
	fi
}

python_configure_all() {
	cat >> setup.cfg <<-EOF || die
		[build_ext]
		portage-ext-modules=$(usex native-extensions true false)
	EOF
}

python_test() {
	esetup.py test
}

python_install() {
	distutils-r1_python_install \
		--system-prefix="${EPREFIX}/usr" \
		--bindir="$(python_get_scriptdir)" \
		--portage-bindir="${EPREFIX}/usr/lib/portage/${EPYTHON}" \
		--sysconfdir="${EPREFIX}/etc" \
		"${@}"

	keepdir /var/log/portage/elog
}

pkg_preinst() {
	# This is allowed to fail if the user/group are invalid for prefix users.
	if chown portage:portage "${ED%/}"/var/log/portage{,/elog} 2>/dev/null ; then
		chmod g+s,ug+rwx "${ED%/}"/var/log/portage{,/elog}
	fi
}