# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

EAPI="4"
WANT_LIBTOOL="none"

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

MY_P="Python-${PV/_/}"
PATCHSET_VERSION="3.4.3-0"

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

LICENSE="PSF-2"
SLOT="3.4"
KEYWORDS="alpha amd64 arm arm64 hppa ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~amd64-fbsd ~sparc-fbsd ~x86-fbsd"
IUSE="build elibc_uclibc examples gdbm hardened ipv6 +ncurses +readline sqlite +ssl +threads tk wininst +xml"

# 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
	app-arch/xz-utils
	>=sys-libs/zlib-1.1.3
	virtual/libffi
	virtual/libintl
	xml? ( >=dev-libs/expat-2.1 )
	!build? (
		gdbm? ( sys-libs/gdbm[berkdb] )
		ncurses? (
			>=sys-libs/ncurses-5.2:0
			readline? ( >=sys-libs/readline-4.1 )
		)
		sqlite? ( >=dev-db/sqlite-3.3.8:3 )
		ssl? ( dev-libs/openssl )
		tk? (
			>=dev-lang/tk-8.0
			dev-tcltk/blt
			dev-tcltk/tix
		)
	)
	!!<sys-apps/sandbox-2.6-r1"
DEPEND="${RDEPEND}
	virtual/pkgconfig
	>=sys-devel/autoconf-2.65
	!sys-devel/gcc[libffi(-)]"
RDEPEND+=" !build? ( app-misc/mime-types )"
PDEPEND="app-eselect/eselect-python"

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

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

	if tc-is-cross-compiler; then
		# Invokes BUILDPYTHON, which is built for the host arch
		local EPATCH_EXCLUDE="*_regenerate_platform-specific_modules.patch"
	fi

	EPATCH_SUFFIX="patch" epatch "${WORKDIR}/patches"
	epatch "${FILESDIR}/${PN}-3.4.3-ncurses-pkg-config.patch"

	sed -i -e "s:@@GENTOO_LIBDIR@@:$(get_libdir):g" \
		Lib/distutils/command/install.py \
		Lib/distutils/sysconfig.py \
		Lib/site.py \
		Lib/sysconfig.py \
		Lib/test/test_site.py \
		Makefile.pre.in \
		Modules/Setup.dist \
		Modules/getpath.c \
		setup.py || die "sed failed to replace @@GENTOO_LIBDIR@@"

	# Disable ABI flags.
	sed -e "s/ABIFLAGS=\"\${ABIFLAGS}.*\"/:/" -i configure.ac || die "sed failed"

	epatch_user

	eautoreconf
}

src_configure() {
	if use build; then
		# Disable extraneous modules with extra dependencies.
		export PYTHON_DISABLE_MODULES="gdbm _curses _curses_panel readline _sqlite3 _tkinter"
		export PYTHON_DISABLE_SSL="1"
	else
		local disable
		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
	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

	[[ "${ARCH}" == "alpha" ]] && append-flags -fPIC

	# 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
	# The configure script fails to use pkg-config correctly.
	# http://bugs.python.org/issue15506
	export ac_cv_path_PKG_CONFIG=$(tc-getPKG_CONFIG)

	# 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."

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

	BUILD_DIR="${WORKDIR}/${CHOST}"
	mkdir -p "${BUILD_DIR}" || die
	cd "${BUILD_DIR}" || die

	ECONF_SOURCE="${S}" OPT="" \
	econf \
		--with-fpectl \
		--enable-shared \
		$(use_enable ipv6) \
		$(use_with threads) \
		--infodir='${prefix}/share/info' \
		--mandir='${prefix}/share/man' \
		--with-computed-gotos \
		--with-dbmliborder="${dbmliborder}" \
		--with-libc="" \
		--enable-loadable-sqlite-extensions \
		--with-system-expat \
		--with-system-ffi \
		--without-ensurepip

	if use threads && grep -q "#define POSIX_SEMAPHORES_NOT_ENABLED 1" pyconfig.h; then
		eerror "configure has detected that the sem_open function is broken."
		eerror "Please ensure that /dev/shm is mounted as a tmpfs with mode 1777."
		die "Broken sem_open function (bug 496328)"
	fi
}

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

	# Avoid invoking pgen for cross-compiles.
	touch Include/graminit.h Python/graminit.c || die

	cd "${BUILD_DIR}" || die
	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

	cd "${BUILD_DIR}" || die

	# Skip failing tests.
	local skipped_tests="gdb"

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

	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 '${EPREFIX}/usr/$(get_libdir)/python${SLOT}/test'"
	elog "and run the tests separately."

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

src_install() {
	local libdir=${ED}/usr/$(get_libdir)/python${SLOT}

	cd "${BUILD_DIR}" || die

	emake DESTDIR="${D}" altinstall

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

	# Backwards compat with Gentoo divergence.
	dosym python${SLOT}-config /usr/bin/python-config-${SLOT}

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

	if use build; then
		rm -fr "${ED}usr/bin/idle${SLOT}" "${libdir}/"{idlelib,sqlite3,test,tkinter}
	else
		use elibc_uclibc && rm -fr "${libdir}/test"
		use sqlite || rm -fr "${libdir}/"{sqlite3,test/test_sqlite*}
		use tk || rm -fr "${ED}usr/bin/idle${SLOT}" "${libdir}/"{idlelib,tkinter,test/test_tk*}
	fi

	use threads || rm -fr "${libdir}/multiprocessing"
	use wininst || rm -f "${libdir}/distutils/command/"wininst-*.exe

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

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

	# 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}:}.
	else
		vars=( PYTHON "${vars[@]}" )
	fi

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

pkg_preinst() {
	if has_version "<${CATEGORY}/${PN}-${SLOT}" && ! has_version ">=${CATEGORY}/${PN}-${SLOT}_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
}