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

EAPI="6"

inherit flag-o-matic multilib-minimal preserve-libs toolchain-funcs usr-ldscript

# Official patches
# See ftp://ftp.cwru.edu/pub/bash/readline-7.0-patches/
PLEVEL="${PV##*_p}"
MY_PV="${PV/_p*}"
MY_PV="${MY_PV/_/-}"
MY_P="${PN}-${MY_PV}"
[[ ${PV} != *_p* ]] && PLEVEL=0
patches() {
        [[ ${PLEVEL} -eq 0 ]] && return 1
        local opt=$1
        eval set -- {1..${PLEVEL}}
        set -- $(printf "${PN}${MY_PV/\.}-%03d " "$@")
        if [[ ${opt} == -s ]] ; then
                echo "${@/#/${DISTDIR}/}"
        else
                local u
                for u in ftp://ftp.cwru.edu/pub/bash mirror://gnu/${PN} ; do
                        printf "${u}/${PN}-${MY_PV}-patches/%s " "$@"
                done
        fi
}

DESCRIPTION="Another cute console display library"
HOMEPAGE="https://tiswww.case.edu/php/chet/readline/rltop.html"

case ${PV} in
        *_alpha*|*_beta*|*_rc*)
                SRC_URI+=" ftp://ftp.cwru.edu/pub/bash/${MY_P}.tar.gz"
        ;;
        *)
                SRC_URI="mirror://gnu/${PN}/${MY_P}.tar.gz $(patches)"
        ;;
esac

LICENSE="GPL-3"
SLOT="0/8"  # subslot matches SONAME major
KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~m68k ~mips ppc ppc64 ~riscv s390 sparc x86 ~amd64-linux ~x86-linux"
IUSE="static-libs +unicode utils"

RDEPEND=">=sys-libs/ncurses-5.9-r3:0=[static-libs?,unicode?,${MULTILIB_USEDEP}]"
DEPEND="${RDEPEND}"
BDEPEND="
        virtual/pkgconfig
"

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

PATCHES=(
        "${FILESDIR}"/${PN}-5.0-no_rpath.patch
        "${FILESDIR}"/${PN}-6.2-rlfe-tgoto.patch #385091
        "${FILESDIR}"/${PN}-7.0-headers.patch
        "${FILESDIR}"/${PN}-8.0-headers.patch
)

# Needed because we don't want the patches being unpacked
# (which emits annoying and useless error messages)
src_unpack() {
        unpack ${MY_P}.tar.gz
}

src_prepare() {
        [[ ${PLEVEL} -gt 0 ]] && eapply -p0 $(patches -s)
        default

        # Force ncurses linking. #71420
        # Use pkg-config to get the right values. #457558
        local ncurses_libs=$($(tc-getPKG_CONFIG) ncurses$(usex unicode w '') --libs)
        sed -i \
                -e "/^SHLIB_LIBS=/s:=.*:='${ncurses_libs}':" \
                support/shobj-conf || die
        sed -i \
                -e "/^[[:space:]]*LIBS=.-lncurses/s:-lncurses:${ncurses_libs}:" \
                examples/rlfe/configure || die

        # fix building under Gentoo/FreeBSD; upstream FreeBSD deprecated
        # objformat for years, so we don't want to rely on that.
        sed -i -e '/objformat/s:if .*; then:if true; then:' support/shobj-conf || die

        ln -s ../.. examples/rlfe/readline || die # for local readline headers
}

src_configure() {
        # fix implicit decls with widechar funcs
        append-cppflags -D_GNU_SOURCE
        # https://lists.gnu.org/archive/html/bug-readline/2010-07/msg00013.html
        append-cppflags -Dxrealloc=_rl_realloc -Dxmalloc=_rl_malloc -Dxfree=_rl_free

        # Make sure configure picks a better ar than `ar`. #484866
        export ac_cv_prog_AR=$(tc-getAR)

        # Force the test since we used sed above to force it.
        export bash_cv_termcap_lib=ncurses

        # Control cross-compiling cases when we know the right answer.
        # In cases where the C library doesn't support wide characters, readline
        # itself won't work correctly, so forcing the answer below should be OK.
        if tc-is-cross-compiler ; then
                use kernel_Winnt || export bash_cv_func_sigsetjmp='present'
                export bash_cv_func_ctype_nonascii='yes'
                export bash_cv_wcwidth_broken='no' #503312
        fi

        # This is for rlfe, but we need to make sure LDFLAGS doesn't change
        # so we can re-use the config cache file between the two.
        append-ldflags -L.

        multilib-minimal_src_configure
}

multilib_src_configure() {
        local myeconfargs=(
                --cache-file="${BUILD_DIR}"/config.cache
                --with-curses
                $(use_enable static-libs static)
        )
        ECONF_SOURCE="${S}" econf "${myeconfargs[@]}"

        if use utils && multilib_is_native_abi && ! tc-is-cross-compiler ; then
                # code is full of AC_TRY_RUN()
                mkdir -p examples/rlfe || die
                cd examples/rlfe || die
                ECONF_SOURCE="${S}"/examples/rlfe \
                econf --cache-file="${BUILD_DIR}"/config.cache
        fi
}

multilib_src_compile() {
        emake

        if use utils && multilib_is_native_abi && ! tc-is-cross-compiler ; then
                # code is full of AC_TRY_RUN()
                cd examples/rlfe || die
                local l
                for l in readline history ; do
                        ln -s ../../shlib/lib${l}$(get_libname)* lib${l}$(get_libname) || die
                        ln -s ../../lib${l}.a lib${l}.a || die
                done
                emake
        fi
}

multilib_src_install() {
        default

        if multilib_is_native_abi ; then
                gen_usr_ldscript -a readline history #4411

                if use utils && ! tc-is-cross-compiler; then
                        dobin examples/rlfe/rlfe
                fi
        fi
}

multilib_src_install_all() {
        HTML_DOCS="doc/history.html doc/readline.html doc/rluserman.html" einstalldocs
        dodoc USAGE
        docinto ps
        dodoc doc/*.ps
}
pkg_preinst() {
        # bug #29865
        # Reappeared in #595324 with paludis so keeping this for now...
        preserve_old_lib /$(get_libdir)/lib{history,readline}.so.{4,5,6,7}
}

pkg_postinst() {
        preserve_old_lib_notify /$(get_libdir)/lib{history,readline}.so.{4,5,6,7}
}