# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=6

inherit eutils alternatives flag-o-matic toolchain-funcs multilib multiprocessing

PATCH_VER=2
CROSS_VER=1.1.7
PATCH_BASE="perl-5.24.3-patches-${PATCH_VER}"

PERL_OLDVERSEN="5.24.2 5.24.1 5.24.0"
DIST_AUTHOR=SHAY

SHORT_PV="${PV%.*}"
MY_P="perl-${PV/_rc/-RC}"
MY_PV="${PV%_rc*}"

DESCRIPTION="Larry Wall's Practical Extraction and Report Language"

SRC_URI="
	mirror://cpan/src/5.0/${MY_P}.tar.xz
	mirror://cpan/authors/id/${DIST_AUTHOR:0:1}/${DIST_AUTHOR:0:2}/${DIST_AUTHOR}/${MY_P}.tar.xz
	https://github.com/gentoo-perl/perl-patchset/releases/download/${PATCH_BASE}/${PATCH_BASE}.tar.xz
	mirror://gentoo/${PATCH_BASE}.tar.xz
	https://dev.gentoo.org/~kentnl/distfiles/${PATCH_BASE}.tar.xz
	https://github.com/arsv/perl-cross/releases/download/${CROSS_VER}/perl-cross-${CROSS_VER}.tar.gz
"
HOMEPAGE="https://www.perl.org/"

LICENSE="|| ( Artistic GPL-1+ )"
SLOT="0/${SHORT_PV}"
KEYWORDS="~alpha amd64 arm arm64 hppa ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~ppc-aix ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
IUSE="berkdb debug doc gdbm ithreads"

RDEPEND="
	berkdb? ( sys-libs/db:= )
	gdbm? ( >=sys-libs/gdbm-1.8.3:= )
	app-arch/bzip2
	sys-libs/zlib
"
DEPEND="${RDEPEND}
	!prefix? ( elibc_FreeBSD? ( sys-freebsd/freebsd-mk-defs ) )
"
PDEPEND="
	>=app-admin/perl-cleaner-2.5
	>=virtual/perl-File-Path-2.130.0
	>=virtual/perl-File-Temp-0.230.400-r2
	>=virtual/perl-Data-Dumper-2.154.0
	virtual/perl-Test-Harness
"
# bug 390719, bug 523624, bug 620304
# virtual/perl-Test-Harness is here for the bundled ExtUtils::MakeMaker

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

PATCHES=( "${FILESDIR}/perl-5.24-libnsl.patch" )

dual_scripts() {
	src_remove_dual      perl-core/Archive-Tar        2.40.100_rc   ptar ptardiff ptargrep
	src_remove_dual      perl-core/CPAN               2.110.100_rc  cpan
	src_remove_dual      perl-core/Digest-SHA         5.950.100_rc  shasum
	src_remove_dual      perl-core/Encode             2.800.100_rc  enc2xs piconv
	src_remove_dual      perl-core/ExtUtils-MakeMaker 7.100.200_rc  instmodsh
	src_remove_dual      perl-core/ExtUtils-ParseXS   3.310.0       xsubpp
	src_remove_dual      perl-core/IO-Compress        2.69.1_rc          zipdetails
	src_remove_dual      perl-core/JSON-PP            2.273.0.100_rc     json_pp
	src_remove_dual      perl-core/Module-CoreList    5.201.709.222.400_rc  corelist
	src_remove_dual      perl-core/Pod-Parser         1.630.0       pod2usage podchecker podselect
	src_remove_dual      perl-core/Pod-Perldoc        3.250.300_rc  perldoc
	src_remove_dual      perl-core/Test-Harness       3.360.100_rc  prove
	src_remove_dual      perl-core/podlators          4.70.0        pod2man pod2text
	src_remove_dual_man  perl-core/podlators          4.70.0        /usr/share/man/man1/perlpodstyle.1
}

check_rebuild() {
	# Fresh install
	if [[ -z "${REPLACING_VERSIONS}" ]]; then
		return 0;
	# Major Upgrade
	# doesn't matter if there's multiple copies, it still needs a rebuild
	# if the string is anything other than "5.CURRENTMAJOR"
	elif [[ "${REPLACING_VERSIONS%.*}" != "${PV%.*}" ]]; then
		echo ""
		ewarn "UPDATE THE PERL MODULES:"
		ewarn "After updating dev-lang/perl the installed Perl modules"
		ewarn "have to be re-installed. In most cases, this is done automatically"
		ewarn "by the package manager, but subsequent steps are still recommended"
		ewarn "to ensure system consistency."
		ewarn
		ewarn "You should start with a depclean to remove any unused perl dependencies"
		ewarn "that may confuse portage in future. Regular depcleans are also encouraged"
		ewarn "as part of your regular update cycle, as that will keep perl upgrades working."
		ewarn "Recommended: emerge --depclean -va"
		ewarn
		ewarn "You should then call perl-cleaner to clean up any old files and trigger any"
		ewarn "remaining rebuilds portage may have missed."
		ewarn "Use: perl-cleaner --all"
		return 0;

	# Reinstall w/ USE Change
	elif (   use ithreads && ! has_version dev-lang/perl[ithreads] ) || \
		 ( ! use ithreads &&   has_version dev-lang/perl[ithreads] ) || \
		 (   use debug    && ! has_version dev-lang/perl[debug]    ) || \
		 ( ! use debug    &&   has_version dev-lang/perl[debug]    ) ; then
		echo ""
		ewarn "TOGGLED USE-FLAGS WARNING:"
		ewarn "You changed one of the use-flags ithreads or debug."
		ewarn "You must rebuild all perl-modules installed."
		ewarn "Use: perl-cleaner --modules ; perl-cleaner --force --libperl"
	fi
}

pkg_setup() {
	case ${CHOST} in
		*-freebsd*)   osname="freebsd" ;;
		*-dragonfly*) osname="dragonfly" ;;
		*-netbsd*)    osname="netbsd" ;;
		*-openbsd*)   osname="openbsd" ;;
		*-darwin*)    osname="darwin" ;;
		*-interix*)   osname="interix" ;;
		*-aix*)       osname="aix" ;;
		*-cygwin*)    osname="cygwin" ;;
		*)            osname="linux" ;;
	esac

	myarch="${CHOST%%-*}-${osname}"
	if use debug ; then
		myarch+="-debug"
	fi
	if use ithreads ; then
		mythreading="-multi"
		myarch+="-thread"
	fi

	LIBPERL="libperl$(get_libname ${MY_PV} )"
	PRIV_LIB="/usr/$(get_libdir)/perl5/${MY_PV}"
	ARCH_LIB="/usr/$(get_libdir)/perl5/${MY_PV}/${myarch}${mythreading}"
	SITE_LIB="/usr/local/$(get_libdir)/perl5/${MY_PV}"
	SITE_ARCH="/usr/local/$(get_libdir)/perl5/${MY_PV}/${myarch}${mythreading}"
	VENDOR_LIB="/usr/$(get_libdir)/perl5/vendor_perl/${MY_PV}"
	VENDOR_ARCH="/usr/$(get_libdir)/perl5/vendor_perl/${MY_PV}/${myarch}${mythreading}"

	dual_scripts
}

src_remove_dual_file() {
	local i pkg ver
	pkg="$1"
	ver="$2"
	shift 2
	case "${EBUILD_PHASE:-none}" in
		postinst|postrm)
			for i in "$@" ; do
				alternatives_auto_makesym "${i}" "${i}-[0-9]*"
			done
			;;
		setup)
			for i in "$@" ; do
				if [[ -f ${EROOT}${i} && ! -h ${EROOT}${i} ]] ; then
					has_version ${pkg} && ewarn "You must reinstall ${pkg} !"
					break
				fi
			done
			;;
		install)
			for i in "$@" ; do
				if ! [[ -f "${ED}"${i} ]] ; then
					ewarn "${i} does not exist!"
					continue
				fi
				mv "${ED}"${i}{,-${ver}-${P}} || die
			done
			;;
	esac
}

src_remove_dual_man() {
	local i pkg ver ff
	pkg="$1"
	ver="$2"
	shift 2
	case "${EBUILD_PHASE:-none}" in
		postinst|postrm)
			for i in "$@" ; do
				ff=`echo "${EROOT}${i%.[0-9]}-${ver}-${P}${i#${i%.[0-9]}}"*`
				ff=${ff##*${i#${i%.[0-9]}}}
				alternatives_auto_makesym "${i}${ff}" "${i%.[0-9]}-[0-9]*"
			done
			;;
		install)
			for i in "$@" ; do
				if ! [[ -f "${ED}"${i} ]] ; then
					ewarn "${i} does not exist!"
					continue
				fi
				mv "${ED}"${i} "${ED}"${i%.[0-9]}-${ver}-${P}${i#${i%.[0-9]}} || die
			done
			;;
	esac
}

src_remove_dual() {
	local i pkg ver
	pkg="$1"
	ver="$2"
	shift 2
	for i in "$@" ; do
		src_remove_dual_file  "${pkg}" "${ver}" "/usr/bin/${i}"
		src_remove_dual_man   "${pkg}" "${ver}" "/usr/share/man/man1/${i}.1"
	done
}

src_prepare_update_patchlevel_h() {
	# Copied and modified from debian:
	# Copyright 2011 Niko Tyni
	# This program is free software; you can redistribute it and/or modify
	# it under the same terms as Perl itself.
	local patchdir="${WORKDIR}/patches"
	local prefix
	local patchoutput="patchlevel-gentoo.h"

	[[ -f ${patchdir}/series ]] || return 0

while read patch
do
	patchname=$(echo $patch | sed 's/\.diff$//')
	< $patchdir/$patch sed -e '/^Subject:/ { N; s/\n / / }' | sed -n -e '

	# massage the patch headers
	s|^Bug: .*https\?://rt\.perl\.org/.*id=\(.*\).*|[perl #\1]|; tprepend;
	s|^Bug: .*https\?://rt\.cpan\.org/.*id=\(.*\).*|[rt.cpan.org #\1]|; tprepend;
	s|^Bug-Gentoo: ||; tprepend;
	s/^\(Subject\|Description\): //; tappend;
	s|^Origin: .*http://perl5\.git\.perl\.org/perl\.git/commit\(diff\)\?/\(.......\).*|[\2]|; tprepend;

	# post-process at the end of input
	$ { x;
		# include the version number in the patchlevel.h description (if available)
		s/List packaged patches/&'" for ${PF}(#${PATCH_VER})"'/;

		# escape any backslashes and double quotes
		s|\\|\\\\|g; s|"|\\"|g;

		# add a prefix
		s|^|\t,"'"$prefix$patchname"' - |;
		# newlines away
		s/\n/ /g; s/  */ /g;
		# add a suffix
		s/ *$/"/; p
	};
	# stop all processing
	d;
	# label: append to the hold space
	:append H; d;
	# label: prepend to the hold space
	:prepend x; H; d;
	'
done < "${WORKDIR}"/patches/series > "${S}/${patchoutput}"
echo "${patchoutput}" >> "${S}/MANIFEST"
}

src_prepare() {
	local patch
	EPATCH_OPTS+=" -p1"
	einfo "Applying patches from ${MY_P}-${PATCH_VER} ..."
	while read patch ; do
		EPATCH_SINGLE_MSG="  ${patch} ..."
		epatch "${WORKDIR}"/patches/${patch}
	done < "${WORKDIR}"/patches/series

	src_prepare_update_patchlevel_h

	if tc-is-cross-compiler; then
		cp -a ../perl-cross-${CROSS_VER}/* . || die

		sed -i \
			-e 's/(15 + $CLEANUP)/(13 + $CLEANUP)/' \
			cnf/diffs/perl5-${PV}/makemaker-test.patch || die

		sed -i \
			-e 's/MakeMaker\.pm .*/MakeMaker.pm bf9174c70a0e50ff2fee4552c7df89b37d292da1/' \
			-e 's/MM_Unix\.pm .*/MM_Unix.pm b0ec308fe2d7dcfcef5732880db0fae1f4ea80fa/' \
			cnf/diffs/perl5-${PV}/customized.patch || die

		sed -i \
			-e 's|^lib/unicore/CombiningClass.pl pod/perluniprops.pod:|lib/unicore/CombiningClass.pl pod/perluniprops.pod: $(CONFIGPM)|' \
			Makefile || die

		# bug 604072
		MAKEOPTS+=" -j1"
		export MAKEOPTS
	fi

	if ! tc-is-static-only ; then
		ln -s ${LIBPERL} libperl$(get_libname ${SHORT_PV}) || die
		ln -s ${LIBPERL} libperl$(get_libname ) || die
	fi

	if use gdbm; then
		sed -i "s:INC => .*:INC => \"-I${EROOT}usr/include/gdbm\":g" \
			ext/NDBM_File/Makefile.PL || die
	fi

	default
}

myconf() {
	# the myconf array is declared in src_configure
	myconf=( "${myconf[@]}" "$@" )
}

src_configure() {
	declare -a myconf

	export LC_ALL="C"
	[[ ${COLUMNS:-1} -ge 1 ]] || unset COLUMNS # bug #394091

	# some arches and -O do not mix :)
	use ppc && replace-flags -O? -O1

	# Perl has problems compiling with -Os in your flags with glibc
	use elibc_uclibc || replace-flags "-Os" "-O2"

	# xlocale.h is going away in glibc-2.26, so it's counterproductive
	# if we use it and include it in CORE/perl.h ... Perl builds just
	# fine with glibc and locale.h only.
	# However, the darwin prefix people have no locale.h ...
	use elibc_glibc && myconf -Ui_xlocale

	# This flag makes compiling crash in interesting ways
	filter-flags "-malign-double"

	# Fixes bug #97645
	use ppc && filter-flags "-mpowerpc-gpopt"

	# Fixes bug #143895 on gcc-4.1.1
	filter-flags "-fsched2-use-superblocks"

	use sparc && myconf -Ud_longdbl

	export BUILD_BZIP2=0
	export BZIP2_INCLUDE=${EROOT}/usr/include
	export BZIP2_LIB=${EROOT}/usr/$(get_libdir)

	export BUILD_ZLIB=False
	export ZLIB_INCLUDE=${EROOT}/usr/include
	export ZLIB_LIB=${EROOT}/usr/$(get_libdir)

	# allow either gdbm to provide ndbm (in <gdbm/ndbm.h>) or db1
	myndbm='U'
	mygdbm='U'
	mydb='U'
	if use gdbm ; then
		mygdbm='D'
		if use berkdb ; then
			myndbm='D'
		fi
	fi
	if use berkdb ; then
		mydb='D'
		has_version '=sys-libs/db-1*' && myndbm='D'
	fi

	myconf "-${myndbm}i_ndbm" "-${mygdbm}i_gdbm" "-${mydb}i_db"

	if use alpha && [[ "$(tc-getCC)" = "ccc" ]] ; then
		ewarn "Perl will not be built with berkdb support, use gcc if you needed it..."
		myconf -Ui_db -Ui_ndbm
	fi

	use ithreads && myconf -Dusethreads

	if use debug ; then
		append-cflags "-g"
		myconf -DDEBUGGING
	elif [[ ${CFLAGS} == *-g* ]] ; then
		myconf -DDEBUGGING=-g
	else
		myconf -DDEBUGGING=none
	fi

	if [[ -n ${PERL_OLDVERSEN} ]] ; then
		local inclist=$(for v in ${PERL_OLDVERSEN}; do echo -n "${v}/${myarch}${mythreading} ${v} "; done )
		myconf -Dinc_version_list="${inclist}"
	fi

	[[ ${ELIBC} == "FreeBSD" ]] && myconf "-Dlibc=/usr/$(get_libdir)/libc.a"

	# Make sure we can do the final link #523730, need to set deployment
	# target to override hardcoded 10.3 which breaks on modern OSX
	[[ ${CHOST} == *-darwin* ]] && \
		myconf "-Dld=env MACOSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET} $(tc-getCC)"

	# Prefix: the host system needs not to follow Gentoo multilib stuff, and in
	# Prefix itself we don't do multilib either, so make sure perl can find
	# something compatible.
	if use prefix ; then
		# Set a hook to check for each detected library whether it actually works.
		export libscheck="
			( echo 'main(){}' > '${T}'/conftest.c &&
			  $(tc-getCC) -o '${T}'/conftest '${T}'/conftest.c -l\$thislib >/dev/null 2>/dev/null
			) || xxx=/dev/null"

		# Use all host paths that might contain useful stuff, the hook above will filter out bad choices.
		local paths="/lib/*-linux-gnu /usr/lib/*-linux-gnu /lib64 /lib/64 /usr/lib64 /usr/lib/64 /lib32 /usr/lib32 /lib /usr/lib"
		myconf "-Dlibpth=${EPREFIX}/$(get_libdir) ${EPREFIX}/usr/$(get_libdir) ${paths}"
	elif [[ $(get_libdir) != "lib" ]] ; then
		# We need to use " and not ', as the written config.sh use ' ...
		myconf "-Dlibpth=/usr/local/$(get_libdir) /$(get_libdir) /usr/$(get_libdir)"
	fi

	# don't try building ODBM, bug #354453
	disabled_extensions="ODBM_File"

	if ! use gdbm ; then
		# workaround for bug #157774: don't try building GDBM related stuff with USE="-gdbm"
		disabled_extensions="${disabled_extensions} GDBM_File NDBM_File"
	fi

	myconf -Dnoextensions="${disabled_extensions}"

	[[ -n "${EXTRA_ECONF}" ]] && ewarn During Perl build, EXTRA_ECONF=${EXTRA_ECONF}
	# allow fiddling via EXTRA_ECONF, bug 558070
	eval "local -a EXTRA_ECONF=(${EXTRA_ECONF})"

	myconf \
		-Duseshrplib \
		-Darchname="${myarch}" \
		-Dcc="$(tc-getCC)" \
		-Doptimize="${CFLAGS}" \
		-Dldflags="${LDFLAGS}" \
		-Dprefix="${EPREFIX}"'/usr' \
		-Dsiteprefix="${EPREFIX}"'/usr/local' \
		-Dvendorprefix="${EPREFIX}"'/usr' \
		-Dscriptdir="${EPREFIX}"'/usr/bin' \
		-Dprivlib="${EPREFIX}${PRIV_LIB}" \
		-Darchlib="${EPREFIX}${ARCH_LIB}" \
		-Dsitelib="${EPREFIX}${SITE_LIB}" \
		-Dsitearch="${EPREFIX}${SITE_ARCH}" \
		-Dvendorlib="${EPREFIX}${VENDOR_LIB}" \
		-Dvendorarch="${EPREFIX}${VENDOR_ARCH}" \
		-Dman1dir="${EPREFIX}"/usr/share/man/man1 \
		-Dman3dir="${EPREFIX}"/usr/share/man/man3 \
		-Dsiteman1dir="${EPREFIX}"/usr/local/man/man1 \
		-Dsiteman3dir="${EPREFIX}"/usr/local/man/man3 \
		-Dvendorman1dir="${EPREFIX}"/usr/share/man/man1 \
		-Dvendorman3dir="${EPREFIX}"/usr/share/man/man3 \
		-Dman1ext='1' \
		-Dman3ext='3pm' \
		-Dlibperl="${LIBPERL}" \
		-Dlocincpth="${EPREFIX}"'/usr/include ' \
		-Dglibpth="${EPREFIX}/$(get_libdir) ${EPREFIX}/usr/$(get_libdir)"' ' \
		-Duselargefiles \
		-Dd_semctl_semun \
		-Dcf_by='Gentoo' \
		-Dmyhostname='localhost' \
		-Dperladmin='root@localhost' \
		-Ud_csh \
		-Dsh="${EPREFIX}"/bin/sh \
		-Dtargetsh="${EPREFIX}"/bin/sh \
		-Uusenm \
		"${myconf[@]}" \
		"${EXTRA_ECONF[@]}"

	if tc-is-cross-compiler; then
		./configure \
			--target="${CHOST}" \
			--build="${CBUILD}" \
			-Dinstallprefix='' \
			-Dinstallusrbinperl='undef' \
			-Dusevendorprefix='define' \
			"${myconf[@]}" \
			|| die "Unable to configure"
	else
		sh Configure \
			-des \
			-Dinstallprefix="${EPREFIX}"'/usr' \
			-Dinstallusrbinperl='n' \
			"${myconf[@]}" \
			|| die "Unable to configure"
	fi
}

src_test() {
	export NO_GENTOO_NETWORK_TESTS=1;
	if [[ ${EUID} == 0 ]] ; then
		ewarn "Test fails with a sandbox error (#328793) if run as root. Skipping tests..."
		return 0
	fi
	use elibc_uclibc && export MAKEOPTS+=" -j1"
	TEST_JOBS="$(makeopts_jobs)" make test_harness || die "test failed"
}

src_install() {
	local i
	local coredir="${ARCH_LIB}/CORE"

	emake DESTDIR="${D}" install

	rm -f "${ED}/usr/bin/perl${MY_PV}"
	ln -s perl "${ED}"/usr/bin/perl${MY_PV} || die

	if ! tc-is-static-only ; then
		dolib.so "${ED}"${coredir}/${LIBPERL}
		rm -f "${ED}"${coredir}/${LIBPERL}
		ln -sf ${LIBPERL} "${ED}"/usr/$(get_libdir)/libperl$(get_libname ${SHORT_PV}) || die
		ln -sf ${LIBPERL} "${ED}"/usr/$(get_libdir)/libperl$(get_libname) || die
		ln -sf ../../../../../$(get_libdir)/${LIBPERL} "${ED}"${coredir}/${LIBPERL} || die
		ln -sf ../../../../../$(get_libdir)/${LIBPERL} "${ED}"${coredir}/libperl$(get_libname ${SHORT_PV}) || die
		ln -sf ../../../../../$(get_libdir)/${LIBPERL} "${ED}"${coredir}/libperl$(get_libname) || die
	fi

	rm -rf "${ED}"/usr/share/man/man3 || die "Unable to remove module man pages"

	# This removes ${D} from Config.pm
	for i in $(find "${D}" -iname "Config.pm" ) ; do
		einfo "Removing ${D} from ${i}..."
		sed -i -e "s:${D}::" "${i}" || die "Sed failed"
	done

	dodoc Changes* README AUTHORS

	if use doc ; then
		# HTML Documentation
		# We expect errors, warnings, and such with the following.

		dodir /usr/share/doc/${PF}/html
		LD_LIBRARY_PATH=. ./perl installhtml \
			--podroot='.' \
			--podpath='lib:ext:pod:vms' \
			--recurse \
			--htmldir="${ED}/usr/share/doc/${PF}/html"
	fi

	[[ -d ${ED}/usr/local ]] && rm -r "${ED}"/usr/local

	dual_scripts
}

pkg_preinst() {
	check_rebuild
}

pkg_postinst() {
	dual_scripts

	if [[ "${ROOT}" = "/" ]] ; then
		local INC DIR file
		INC=$(perl -e 'for $line (@INC) { next if $line eq "."; next if $line =~ m/'${SHORT_PV}'|etc|local|perl$/; print "$line\n" }')
		einfo "Removing old .ph files"
		for DIR in ${INC} ; do
			if [[ -d "${DIR}" ]] ; then
				for file in $(find "${DIR}" -name "*.ph" -type f ) ; do
					rm -f "${file}"
					einfo "<< ${file}"
				done
			fi
		done
		# Silently remove the now empty dirs
		for DIR in ${INC} ; do
			if [[ -d "${DIR}" ]] ; then
				find "${DIR}" -depth -type d -print0 | xargs -0 -r rmdir &> /dev/null
			fi
		done

	fi
}

pkg_postrm(){
	dual_scripts
}