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

EAPI="7"
WANT_LIBTOOL="none"

inherit autotools flag-o-matic pax-utils python-utils-r1 toolchain-funcs

MY_P="Python-${PV}"
PATCHSET_VERSION="3.7.4-1"

DESCRIPTION="An interpreted, interactive, object-oriented programming language"
HOMEPAGE="https://www.python.org/"
SRC_URI="https://www.python.org/ftp/python/${PV}/${MY_P}.tar.xz
	https://dev.gentoo.org/~floppym/python/python-gentoo-patches-${PATCHSET_VERSION}.tar.xz"

LICENSE="PSF-2"
SLOT="3.7/3.7m"
KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd"
IUSE="bluetooth build examples gdbm hardened ipv6 libressl +ncurses +readline sqlite +ssl test tk wininst +xml"
RESTRICT="!test? ( test )"

# Do not add a dependency on dev-lang/python to this ebuild.
# If you need to apply a patch which requires python for bootstrapping, please
# run the bootstrap code on your dev box and include the results in the
# patchset. See bug 447752.

RDEPEND="app-arch/bzip2:0=
	app-arch/xz-utils:0=
	sys-apps/util-linux:0=
	>=sys-libs/zlib-1.1.3:0=
	virtual/libffi:=
	virtual/libintl
	gdbm? ( sys-libs/gdbm:0=[berkdb] )
	ncurses? ( >=sys-libs/ncurses-5.2:0= )
	readline? ( >=sys-libs/readline-4.1:0= )
	sqlite? ( >=dev-db/sqlite-3.3.8:3= )
	ssl? (
		!libressl? ( dev-libs/openssl:0= )
		libressl? ( dev-libs/libressl:0= )
	)
	tk? (
		>=dev-lang/tcl-8.0:0=
		>=dev-lang/tk-8.0:0=
		dev-tcltk/blt:0=
		dev-tcltk/tix
	)
	xml? ( >=dev-libs/expat-2.1:0= )
	!!<sys-apps/sandbox-2.6-r1"
# bluetooth requires headers from bluez
DEPEND="${RDEPEND}
	bluetooth? ( net-wireless/bluez )
	test? ( app-arch/xz-utils[extra-filters(+)] )
	virtual/pkgconfig
	!sys-devel/gcc[libffi(-)]"
RDEPEND+=" !build? ( app-misc/mime-types )"
PDEPEND=">=app-eselect/eselect-python-20140125-r1"

S="${WORKDIR}/${MY_P}"
PYVER=${SLOT%/*}

src_prepare() {
	# Ensure that internal copies of expat, libffi and zlib are not used.
	rm -fr Modules/expat
	rm -fr Modules/_ctypes/libffi*
	rm -fr Modules/zlib

	local PATCHES=(
		"${WORKDIR}/patches"
	)

	default

	sed -i -e "s:@@GENTOO_LIBDIR@@:$(get_libdir):g" \
		setup.py || die "sed failed to replace @@GENTOO_LIBDIR@@"

	eautoreconf
}

src_configure() {
	local disable
	# disable automagic bluetooth headers detection
	use bluetooth || export ac_cv_header_bluetooth_bluetooth_h=no
	use gdbm     || disable+=" gdbm"
	use ncurses  || disable+=" _curses _curses_panel"
	use readline || disable+=" readline"
	use sqlite   || disable+=" _sqlite3"
	use ssl      || export PYTHON_DISABLE_SSL="1"
	use tk       || disable+=" _tkinter"
	use xml      || disable+=" _elementtree pyexpat" # _elementtree uses pyexpat.
	export PYTHON_DISABLE_MODULES="${disable}"

	if ! use xml; then
		ewarn "You have configured Python without XML support."
		ewarn "This is NOT a recommended configuration as you"
		ewarn "may face problems parsing any XML documents."
	fi

	if [[ -n "${PYTHON_DISABLE_MODULES}" ]]; then
		einfo "Disabled modules: ${PYTHON_DISABLE_MODULES}"
	fi

	if [[ "$(gcc-major-version)" -ge 4 ]]; then
		append-flags -fwrapv
	fi

	filter-flags -malign-double

	# https://bugs.gentoo.org/show_bug.cgi?id=50309
	if is-flagq -O3; then
		is-flagq -fstack-protector-all && replace-flags -O3 -O2
		use hardened && replace-flags -O3 -O2
	fi

	# Export CXX so it ends up in /usr/lib/python3.X/config/Makefile.
	tc-export CXX

	# Set LDFLAGS so we link modules with -lpython3.2 correctly.
	# Needed on FreeBSD unless Python 3.2 is already installed.
	# Please query BSD team before removing this!
	append-ldflags "-L."

	# Fix implicit declarations on cross and prefix builds. Bug #674070.
	use ncurses && append-cppflags -I"${ESYSROOT}"/usr/include/ncursesw

	local dbmliborder
	if use gdbm; then
		dbmliborder+="${dbmliborder:+:}gdbm"
	fi

	local myeconfargs=(
		--enable-shared
		$(use_enable ipv6)
		--infodir='${prefix}/share/info'
		--mandir='${prefix}/share/man'
		--with-computed-gotos
		--with-dbmliborder="${dbmliborder}"
		--with-libc=
		--enable-loadable-sqlite-extensions
		--without-ensurepip
		--with-system-expat
		--with-system-ffi
	)

	OPT="" econf "${myeconfargs[@]}"
}

src_compile() {
	# Ensure sed works as expected
	# https://bugs.gentoo.org/594768
	local -x LC_ALL=C

	emake CPPFLAGS= CFLAGS= LDFLAGS=

	# Work around bug 329499. See also bug 413751 and 457194.
	if has_version dev-libs/libffi[pax_kernel]; then
		pax-mark E python
	else
		pax-mark m python
	fi
}

src_test() {
	# Tests will not work when cross compiling.
	if tc-is-cross-compiler; then
		elog "Disabling tests due to crosscompiling."
		return
	fi

	# Skip failing tests.
	local skipped_tests="gdb"

	for test in ${skipped_tests}; do
		mv "${S}"/Lib/test/test_${test}.py "${T}"
	done

	# bug 660358
	local -x COLUMNS=80

	local -x PYTHONDONTWRITEBYTECODE=

	emake test EXTRATESTOPTS="-u-network" CPPFLAGS= CFLAGS= LDFLAGS= < /dev/tty
	local result=$?

	for test in ${skipped_tests}; do
		mv "${T}/test_${test}.py" "${S}"/Lib/test
	done

	elog "The following tests have been skipped:"
	for test in ${skipped_tests}; do
		elog "test_${test}.py"
	done

	elog "If you would like to run them, you may:"
	elog "cd '${EPREFIX}/usr/lib/python${PYVER}/test'"
	elog "and run the tests separately."

	if [[ ${result} -ne 0 ]]; then
		die "emake test failed"
	fi
}

src_install() {
	local libdir=${ED%/}/usr/lib/python${PYVER}

	emake DESTDIR="${D}" altinstall

	sed \
		-e "s/\(CONFIGURE_LDFLAGS=\).*/\1/" \
		-e "s/\(PY_LDFLAGS=\).*/\1/" \
		-i "${libdir}/config-${PYVER}"*/Makefile || die "sed failed"

	# Fix collisions between different slots of Python.
	rm -f "${ED%/}/usr/$(get_libdir)/libpython3.so"

	# Cheap hack to get version with ABIFLAGS
	local abiver=$(cd "${ED%/}/usr/include"; echo python*)
	if [[ ${abiver} != python${PYVER} ]]; then
		# Replace python3.X with a symlink to python3.Xm
		rm "${ED%/}/usr/bin/python${PYVER}" || die
		dosym "${abiver}" "/usr/bin/python${PYVER}"
		# Create python3.X-config symlink
		dosym "${abiver}-config" "/usr/bin/python${PYVER}-config"
		# Create python-3.5m.pc symlink
		dosym "python-${PYVER}.pc" "/usr/$(get_libdir)/pkgconfig/${abiver/${PYVER}/-${PYVER}}.pc"
	fi

	# python seems to get rebuilt in src_install (bug 569908)
	# Work around it for now.
	if has_version dev-libs/libffi[pax_kernel]; then
		pax-mark E "${ED%/}/usr/bin/${abiver}"
	else
		pax-mark m "${ED%/}/usr/bin/${abiver}"
	fi

	use sqlite || rm -r "${libdir}/"{sqlite3,test/test_sqlite*} || die
	use tk || rm -r "${ED%/}/usr/bin/idle${PYVER}" "${libdir}/"{idlelib,tkinter,test/test_tk*} || die

	use wininst || rm "${libdir}/distutils/command/"wininst-*.exe || die

	dodoc "${S}"/Misc/{ACKS,HISTORY,NEWS}

	if use examples; then
		insinto /usr/share/doc/${PF}/examples
		find "${S}"/Tools -name __pycache__ -print0 | xargs -0 rm -fr
		doins -r "${S}"/Tools
	fi
	insinto /usr/share/gdb/auto-load/usr/$(get_libdir) #443510
	local libname=$(printf 'e:\n\t@echo $(INSTSONAME)\ninclude Makefile\n' | \
		emake --no-print-directory -s -f - 2>/dev/null)
	newins "${S}"/Tools/gdb/libpython.py "${libname}"-gdb.py

	newconfd "${FILESDIR}/pydoc.conf" pydoc-${PYVER}
	newinitd "${FILESDIR}/pydoc.init" pydoc-${PYVER}
	sed \
		-e "s:@PYDOC_PORT_VARIABLE@:PYDOC${PYVER/./_}_PORT:" \
		-e "s:@PYDOC@:pydoc${PYVER}:" \
		-i "${ED%/}/etc/conf.d/pydoc-${PYVER}" "${ED%/}/etc/init.d/pydoc-${PYVER}" || die "sed failed"

	# for python-exec
	local vars=( EPYTHON PYTHON_SITEDIR PYTHON_SCRIPTDIR )

	# if not using a cross-compiler, use the fresh binary
	if ! tc-is-cross-compiler; then
		local -x PYTHON=./python
		local -x LD_LIBRARY_PATH=${LD_LIBRARY_PATH+${LD_LIBRARY_PATH}:}${PWD}
	else
		vars=( PYTHON "${vars[@]}" )
	fi

	python_export "python${PYVER}" "${vars[@]}"
	echo "EPYTHON='${EPYTHON}'" > epython.py || die
	python_domodule epython.py

	# python-exec wrapping support
	local pymajor=${PYVER%.*}
	mkdir -p "${D%/}${PYTHON_SCRIPTDIR}" || die
	# python and pythonX
	ln -s "../../../bin/${abiver}" "${D%/}${PYTHON_SCRIPTDIR}/python${pymajor}" || die
	ln -s "python${pymajor}" "${D%/}${PYTHON_SCRIPTDIR}/python" || die
	# python-config and pythonX-config
	# note: we need to create a wrapper rather than symlinking it due
	# to some random dirname(argv[0]) magic performed by python-config
	cat > "${D%/}${PYTHON_SCRIPTDIR}/python${pymajor}-config" <<-EOF || die
		#!/bin/sh
		exec "${abiver}-config" "\${@}"
	EOF
	chmod +x "${D%/}${PYTHON_SCRIPTDIR}/python${pymajor}-config" || die
	ln -s "python${pymajor}-config" "${D%/}${PYTHON_SCRIPTDIR}/python-config" || die
	# 2to3, pydoc, pyvenv
	ln -s "../../../bin/2to3-${PYVER}" "${D%/}${PYTHON_SCRIPTDIR}/2to3" || die
	ln -s "../../../bin/pydoc${PYVER}" "${D%/}${PYTHON_SCRIPTDIR}/pydoc" || die
	ln -s "../../../bin/pyvenv-${PYVER}" "${D%/}${PYTHON_SCRIPTDIR}/pyvenv" || die
	# idle
	if use tk; then
		ln -s "../../../bin/idle${PYVER}" "${D%/}${PYTHON_SCRIPTDIR}/idle" || die
	fi
}

pkg_preinst() {
	if has_version "<${CATEGORY}/${PN}-${PYVER}" && ! has_version ">=${CATEGORY}/${PN}-${PYVER}_alpha"; then
		python_updater_warning="1"
	fi
}

eselect_python_update() {
	if [[ -z "$(eselect python show)" || ! -f "${EROOT%/}/usr/bin/$(eselect python show)" ]]; then
		eselect python update
	fi

	if [[ -z "$(eselect python show --python${PV%%.*})" || ! -f "${EROOT%/}/usr/bin/$(eselect python show --python${PV%%.*})" ]]; then
		eselect python update --python${PV%%.*}
	fi
}

pkg_postinst() {
	eselect_python_update

	if [[ "${python_updater_warning}" == "1" ]]; then
		ewarn "You have just upgraded from an older version of Python."
		ewarn
		ewarn "Please adjust PYTHON_TARGETS (if so desired), and run emerge with the --newuse or --changed-use option to rebuild packages installing python modules."
	fi
}

pkg_postrm() {
	eselect_python_update
}