# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

VERIFY_SIG_OPENPGP_KEY_PATH="${BROOT}"/usr/share/openpgp-keys/thomasdickey.asc
inherit flag-o-matic toolchain-funcs multilib multilib-minimal preserve-libs usr-ldscript verify-sig

MY_PV="${PV:0:3}"
MY_P="${PN}-${MY_PV}"
DESCRIPTION="Console display library"
HOMEPAGE="https://www.gnu.org/software/ncurses/ https://invisible-island.net/ncurses/"
SRC_URI="mirror://gnu/ncurses/${MY_P}.tar.gz
	https://invisible-island.net/archives/${PN}/${MY_P}.tar.gz
	verify-sig? ( mirror://gnu/ncurses/${MY_P}.tar.gz.sig )"

if [[ ${PV} == *_p* ]] ; then
	# Sometimes, after releases, there's no megapatch available yet.
	#
	# From upstream README at e.g. https://invisible-island.net/archives/ncurses/6.3/:
	#
	#	"At times (generally to mark a relatively stable point), I create a rollup
	#	patch, which consists of all changes from the release through the current date."
	#
	# Also, from https://lists.gnu.org/archive/html/bug-ncurses/2019-08/msg00039.html,
	# the patches are considered to be acceptable to use after some testing. They
	# are both for development but also bug fixes.
	#
	# This array should contain a list of all the snapshots since the last
	# release if there's no megapatch available yet.
	PATCH_DATES=(
		20211026
		20211030
		20211106
		20211113
		20211115
		20211120
		20211127
		20211204
		20211211
		20211219
		20211225
		20220101
		20220115
		20220122
		20220129
		20220205
		20220212
		20220219
		20220226
		20220305
		20220312
		20220319
		20220326
		20220402
		20220409
		20220416

		# Latest patch is just _pN = $(ver_cut 4)
		$(ver_cut 4)
	)

	if [[ -z ${PATCH_DATES[@]} ]] ; then
		SRC_URI+=" https://invisible-island.net/archives/${PN}/${PV/_p*}/${P/_p/-}.patch.sh.gz"
		SRC_URI+=" verify-sig? ( https://invisible-island.net/archives/${PN}/${PV/_p*}/${P/_p/-}.patch.sh.gz.asc"
	else
		patch_url=
		my_patch_index=
		for ((my_patch_index=0; my_patch_index < "${#PATCH_DATES[@]}"; my_patch_index++)); do
			patch_url="$(printf "https://invisible-island.net/archives/${PN}/${PV/_p*}/${MY_P}-%s" ${PATCH_DATES[${my_patch_index}]}.patch.gz)"
			SRC_URI+=" ${patch_url}"
			SRC_URI+=" verify-sig? ( ${patch_url}.asc )"
		done
		unset patch_url
		unset my_patch_index
	fi
fi

LICENSE="MIT"
# The subslot reflects the SONAME.
SLOT="0/6"
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
IUSE="ada +cxx debug doc gpm minimal profile +stack-realign static-libs test tinfo trace"
RESTRICT="!test? ( test )"

DEPEND="gpm? ( sys-libs/gpm[${MULTILIB_USEDEP}] )"
# Block the older ncurses that installed all files w/SLOT=5, bug #557472
RDEPEND="${DEPEND}
	!<=sys-libs/ncurses-5.9-r4:5
	!<sys-libs/slang-2.3.2_pre23
	!<x11-terms/rxvt-unicode-9.06-r3
	!<x11-terms/st-0.6-r1"
BDEPEND="verify-sig? ( sec-keys/openpgp-keys-thomasdickey )"

S="${WORKDIR}/${MY_P}"

PATCHES=(
	"${FILESDIR}/${PN}-5.7-nongnu.patch"
	"${FILESDIR}/${PN}-6.0-rxvt-unicode-9.15.patch" # bug #192083, bug #383871
	"${FILESDIR}/${PN}-6.0-pkg-config.patch"
	"${FILESDIR}/${PN}-6.0-ticlib.patch" # bug #557360
	"${FILESDIR}/${PN}-6.2_p20210123-cppflags-cross.patch" # bug #601426
)

src_prepare() {
	if [[ ${PV} == *_p* ]] ; then
		if [[ -z ${PATCH_DATES[@]} ]] ; then
			# If we have a rollup patch, use that instead of the individual ones.
			eapply "${WORKDIR}"/${P/_p/-}-patch.sh
		else
			eapply "${WORKDIR}"/
		fi
	fi

	default
}

src_configure() {
	# bug #115036
	unset TERMINFO

	tc-export_build_env BUILD_{CC,CPP}

	# bug #214642
	BUILD_CPPFLAGS+=" -D_GNU_SOURCE"

	# Should be fixed upstream soon:
	# https://lists.gnu.org/archive/html/bug-ncurses/2022-08/msg00024.html
	# bug #866398
	sed -i -e 's/ld --verbose/${LD} --verbose/' configure || die
	sed -i -e 's/pkg-config --version/${PKG_CONFIG} --version/' misc/gen-pkgconfig.in || die

	# Build the various variants of ncurses -- narrow, wide, and threaded. #510440
	# Order matters here -- we want unicode/thread versions to come last so that the
	# binaries in /usr/bin support both wide and narrow.
	# The naming is also important as we use these directly with filenames and when
	# checking configure flags.
	NCURSES_TARGETS=(
		ncurses
		ncursesw
		ncursest
		ncursestw
	)

	# When installing ncurses, we have to use a compatible version of tic.
	# This comes up when cross-compiling, doing multilib builds, upgrading,
	# or installing for the first time.  Build a local copy of tic whenever
	# the host version isn't available. bug #249363, bug #557598
	if ! has_version -b "~sys-libs/${P}:0" ; then
		local lbuildflags="-static"

		# some toolchains don't quite support static linking
		local dbuildflags="-Wl,-rpath,${WORKDIR}/lib"
		case ${CHOST} in
			*-darwin*)  dbuildflags=     ;;
			*-solaris*) dbuildflags="-Wl,-R,${WORKDIR}/lib" ;;
		esac
		echo "int main() {}" | \
			$(tc-getCC) -o x -x c - ${lbuildflags} -pipe >& /dev/null \
			|| lbuildflags="${dbuildflags}"

		# We can't re-use the multilib BUILD_DIR because we run outside of it.
		BUILD_DIR="${WORKDIR}" \
		CC=${BUILD_CC} \
		CHOST=${CBUILD} \
		CFLAGS=${BUILD_CFLAGS} \
		CXXFLAGS=${BUILD_CXXFLAGS} \
		CPPFLAGS=${BUILD_CPPFLAGS} \
		LDFLAGS="${BUILD_LDFLAGS} ${lbuildflags}" \
		do_configure cross --without-shared --with-normal --with-progs
	fi
	multilib-minimal_src_configure
}

multilib_src_configure() {
	if [[ ${ABI} == x86 ]] ; then
		# For compatibility with older binaries at slight performance cost.
		# bug #616402
		use stack-realign && append-flags -mstackrealign
	fi

	local t
	for t in "${NCURSES_TARGETS[@]}" ; do
		do_configure "${t}"
	done
}

do_configure() {
	local target=$1
	shift

	mkdir "${BUILD_DIR}/${target}" || die
	cd "${BUILD_DIR}/${target}" || die

	local conf=(
		# We need the basic terminfo files in /etc, bug #37026.  We will
		# add '--with-terminfo-dirs' and then populate /etc/terminfo in
		# src_install() ...
		--with-terminfo-dirs="${EPREFIX}/etc/terminfo:${EPREFIX}/usr/share/terminfo"

		# Enable installation of .pc files.
		--enable-pc-files
		# This path is used to control where the .pc files are installed.
		--with-pkg-config-libdir="${EPREFIX}/usr/$(get_libdir)/pkgconfig"

		# Now the rest of the various standard flags.
		--with-shared
		# (Originally disabled until bug #245417 is sorted out, but now
		# just keeping it off for good, given nobody needed it until now
		# (2022) and we're trying to phase out bdb.)
		--without-hashed-db
		$(use_with ada)
		$(use_with cxx)
		$(use_with cxx cxx-binding)
		--with-cxx-shared
		$(use_with debug)
		$(use_with profile)
		# The configure script uses ldd to parse the linked output which
		# is flaky for cross-compiling/multilib/ldd versions/etc...
		$(use_with gpm gpm libgpm.so.1)
		# Required for building  on mingw-w64, and possibly other windows
		# platforms, bug #639670
		$(use_enable kernel_Winnt term-driver)
		--disable-termcap
		--enable-symlinks
		--with-rcs-ids
		--with-manpage-format=normal
		--enable-const
		--enable-colorfgbg
		--enable-hard-tabs
		--enable-echo
		$(use_enable !ada warnings)
		$(use_with debug assertions)
		$(use_enable !debug leaks)
		$(use_with debug expanded)
		$(use_with !debug macros)
		$(multilib_native_with progs)
		$(use_with test tests)
		$(use_with trace)
		$(use_with tinfo termlib)
		--disable-stripping
		--disable-pkg-ldflags
	)

	if [[ ${target} == ncurses*w ]] ; then
		conf+=( --enable-widec )
	else
		conf+=( --disable-widec )
	fi
	if [[ ${target} == ncursest* ]] ; then
		conf+=( --with-{pthread,reentrant} )
	else
		conf+=( --without-{pthread,reentrant} )
	fi

	# Make sure each variant goes in a unique location.
	if [[ ${target} == "ncurses" ]] ; then
		# "ncurses" variant goes into "${EPREFIX}"/usr/include
		# It is needed on Prefix because the configure script appends
		# "ncurses" to "${prefix}/include" if "${prefix}" is not /usr.
		conf+=( --enable-overwrite )
	else
		conf+=( --includedir="${EPREFIX}"/usr/include/${target} )
	fi
	# See comments in src_configure.
	if [[ ${target} != "cross" ]] ; then
		local cross_path="${WORKDIR}/cross"
		[[ -d ${cross_path} ]] && export TIC_PATH="${cross_path}/progs/tic"
	fi

	ECONF_SOURCE="${S}" econf "${conf[@]}" "$@"
}

src_compile() {
	# See comments in src_configure.
	if ! has_version -b "~sys-libs/${P}:0" ; then
		# We could possibly merge these two branches but opting to be
		# conservative when merging some of the Prefix changes.

		if [[ ${CHOST} == *-cygwin* ]] && ! multilib_is_native_abi ; then
			# We make 'tic$(x)' here, for Cygwin having x=".exe".
			BUILD_DIR="${WORKDIR}" \
				 do_compile cross -C progs all PROGS='tic$(x)'
		else
			BUILD_DIR="${WORKDIR}" \
				 do_compile cross -C progs tic
		fi
	fi

	multilib-minimal_src_compile
}

multilib_src_compile() {
	local t
	for t in "${NCURSES_TARGETS[@]}" ; do
		do_compile "${t}"
	done
}

do_compile() {
	local target=$1
	shift

	cd "${BUILD_DIR}/${target}" || die

	# A little hack to fix parallel builds ... they break when
	# generating sources so if we generate the sources first (in
	# non-parallel), we can then build the rest of the package
	# in parallel.  This is not really a perf hit since the source
	# generation is quite small.
	emake -j1 sources

	# For some reason, sources depends on pc-files which depends on
	# compiled libraries which depends on sources which ...
	# Manually delete the pc-files file so the install step will
	# create the .pc files we want.
	rm -f misc/pc-files || die
	emake "$@"
}

multilib_src_install() {
	local target
	for target in "${NCURSES_TARGETS[@]}" ; do
		emake -C "${BUILD_DIR}/${target}" DESTDIR="${D}" install
	done

	# Move main libraries into /.
	if multilib_is_native_abi ; then
		gen_usr_ldscript -a \
			"${NCURSES_TARGETS[@]}" \
			$(usex tinfo 'tinfow tinfo' '')
	fi

	if ! tc-is-static-only ; then
		# Provide a link for -lcurses.
		ln -sf libncurses$(get_libname) "${ED}"/usr/$(get_libdir)/libcurses$(get_libname) || die
	fi

	# Don't delete '*.dll.a', needed for linking, bug #631468
	if ! use static-libs; then
		find "${ED}"/usr/ -name '*.a' ! -name '*.dll.a' -delete || die
	fi

	# Build fails to create this ...
	# -FIXME-
	# Ugly hackaround for riscv having two parts libdir (bug #689240)
	# Replace this hack with an official solution once we have one...
	# -FIXME-
	dosym $(sed 's@[^/]\+@..@g' <<< $(get_libdir))/share/terminfo \
		/usr/$(get_libdir)/terminfo
}

multilib_src_install_all() {
	# We need the basic terminfo files in /etc for embedded/recovery, bug #37026
	einfo "Installing basic terminfo files in /etc..."
	local terms=(
		# Dumb/simple values that show up when using the in-kernel VT.
		ansi console dumb linux
		vt{52,100,102,200,220}
		# [u]rxvt users used to be pretty common.  Probably should drop this
		# since upstream is dead and people are moving away from it.
		rxvt{,-unicode}{,-256color}
		# xterm users are common, as is terminals re-using/spoofing it.
		xterm xterm-{,256}color
		# screen is common (and reused by tmux).
		screen{,-256color}
		screen.xterm-256color
	)
	local x
	for x in "${terms[@]}"; do
		local termfile=$(find "${ED}"/usr/share/terminfo/ -name "${x}" 2>/dev/null)
		local basedir=$(basename "$(dirname "${termfile}")")

		if [[ -n ${termfile} ]] ; then
			dodir "/etc/terminfo/${basedir}"
			mv "${termfile}" "${ED}/etc/terminfo/${basedir}/" || die
			dosym "../../../../etc/terminfo/${basedir}/${x}" \
				"/usr/share/terminfo/${basedir}/${x}"
		fi
	done

	echo "CONFIG_PROTECT_MASK=\"/etc/terminfo\"" | newenvd - 50ncurses

	use minimal && rm -r "${ED}"/usr/share/terminfo*
	# Because ncurses5-config --terminfo returns the directory we keep it
	# bug #245374
	keepdir /usr/share/terminfo

	cd "${S}" || die
	dodoc ANNOUNCE MANIFEST NEWS README* TO-DO doc/*.doc
	if use doc ; then
		docinto html
		dodoc -r doc/html/
	fi
}

pkg_preinst() {
	preserve_old_lib /$(get_libdir)/libncurses.so.5
	preserve_old_lib /$(get_libdir)/libncursesw.so.5
}

pkg_postinst() {
	preserve_old_lib_notify /$(get_libdir)/libncurses.so.5
	preserve_old_lib_notify /$(get_libdir)/libncursesw.so.5
}