# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

# ninja does not work due to fortran
CMAKE_MAKEFILE_GENERATOR=emake
FORTRAN_NEEDED="fortran"
PYTHON_COMPAT=( python3_{9..10} ) # python3_11 fails to compile

inherit cmake cuda elisp-common fortran-2 python-single-r1 toolchain-funcs

DESCRIPTION="C++ data analysis framework and interpreter from CERN"
HOMEPAGE="https://root.cern"

IUSE="+X aqua +asimage c++14 +c++17 cuda cudnn +davix debug emacs
	+examples fits fftw fortran +gdml graphviz +gsl http libcxx +minuit
	mpi mysql odbc +opengl oracle postgres pythia6 pythia8 +python
	qt5 R +roofit +root7 shadow sqlite +ssl +tbb test +tmva +unuran uring
	vc +xml xrootd"
RESTRICT="test"
PROPERTIES="test_network"

if [[ ${PV} =~ "9999" ]] ; then
	inherit git-r3
	EGIT_REPO_URI="https://github.com/root-project/root.git"
	if [[ ${PV} == "9999" ]]; then
		SLOT="0"
	else
		SLOT="$(ver_cut 1-2)/$(ver_cut 3)"
		EGIT_BRANCH="v$(ver_cut 1)-$(ver_cut 2)-00-patches"
	fi
else
	SLOT="$(ver_cut 1-2)/$(ver_cut 3)"
	KEYWORDS="~amd64 ~x86"
	SRC_URI="https://root.cern/download/${PN}_v${PV}.source.tar.gz"
fi

LICENSE="LGPL-2.1 freedist MSttfEULA LGPL-3 libpng UoI-NCSA"

REQUIRED_USE="
	^^ ( c++14 c++17 )
	cuda? ( tmva )
	cudnn? ( cuda )
	!X? ( !asimage !opengl !qt5 )
	davix? ( ssl xml )
	python? ( ${PYTHON_REQUIRED_USE} )
	qt5? ( root7 )
	root7? ( || ( c++17 ) )
	tmva? ( gsl python )
	uring? ( root7 )
"

CDEPEND="
	app-arch/lz4
	app-arch/zstd
	app-arch/xz-utils
	fortran? ( dev-lang/cfortran )
	dev-cpp/nlohmann_json
	dev-libs/libpcre:3
	dev-libs/xxhash
	media-fonts/dejavu
	media-libs/freetype:2
	media-libs/libpng:0=
	virtual/libcrypt:=
	sys-libs/ncurses:=
	sys-libs/zlib
	X? (
		x11-libs/libX11:0
		x11-libs/libXext:0
		x11-libs/libXft:0
		x11-libs/libXpm:0
		opengl? (
			media-libs/ftgl:0=
			media-libs/glew:0=
			virtual/opengl
			virtual/glu
			x11-libs/gl2ps:0=
		)
		qt5? (
			dev-qt/qtcore:5
			dev-qt/qtgui:5
			dev-qt/qtwebengine:5[widgets]
		)
	)
	asimage? ( media-libs/libafterimage[gif,jpeg,png,tiff] )
	cuda? ( >=dev-util/nvidia-cuda-toolkit-9.0 )
	cudnn? ( dev-libs/cudnn )
	davix? ( net-libs/davix )
	emacs? ( >=app-editors/emacs-23.1:* )
	fftw? ( sci-libs/fftw:3.0= )
	fits? ( sci-libs/cfitsio:0= )
	graphviz? ( media-gfx/graphviz )
	gsl? ( sci-libs/gsl:= )
	http? ( dev-libs/fcgi:0= )
	libcxx? ( sys-libs/libcxx )
	unuran? ( sci-mathematics/unuran:0= )
	minuit? ( !sci-libs/minuit )
	mpi? ( virtual/mpi[fortran?] )
	mysql? ( dev-db/mysql-connector-c )
	odbc? (
		|| (
			dev-db/libiodbc
			dev-db/unixODBC
		)
	)
	oracle? ( dev-db/oracle-instantclient[sdk] )
	postgres? ( dev-db/postgresql:= )
	pythia6? ( sci-physics/pythia:6 )
	pythia8? ( sci-physics/pythia:8 )
	python? ( ${PYTHON_DEPS} )
	R? ( dev-lang/R )
	shadow? ( sys-apps/shadow )
	sqlite? ( dev-db/sqlite:3 )
	ssl? ( dev-libs/openssl:0= )
	tbb? ( dev-cpp/tbb:= )
	tmva? (
		$(python_gen_cond_dep '
			dev-python/numpy[${PYTHON_USEDEP}]
		')
	)
	uring? ( sys-libs/liburing:= )
	vc? ( dev-libs/vc:= )
	xml? ( dev-libs/libxml2:2= )
	xrootd? ( net-libs/xrootd:0= )
"

DEPEND="${CDEPEND}
	virtual/pkgconfig"

RDEPEND="${CDEPEND}"

PATCHES=(
	"${FILESDIR}"/${PN}-6.12.06_cling-runtime-sysroot.patch
)

pkg_setup() {
	use fortran && fortran-2_pkg_setup
	use python && python-single-r1_pkg_setup

	elog "There are extra options on packages not available in Gentoo."
	elog "You can use the environment variable MYCMAKEARGS to enable"
	elog "these packages. For example, for Vdt you would set:"
	elog "MYCMAKEARGS=\"-Dbuiltin_vdt=ON -Dvdt=ON\""
}

src_prepare() {
	use cuda && cuda_src_prepare

	cmake_src_prepare

	sed -i "/CLING_BUILD_PLUGINS/d" interpreter/CMakeLists.txt || die

	# CSS should use local images
	sed -i -e 's,http://.*/,,' etc/html/ROOT.css || die "html sed failed"

	eapply_user
}

# Note: ROOT uses bundled clang because it is patched and API-incompatible
#       with vanilla clang. The patches enable the C++ interpreter to work.
#       Since ROOT installs many files into /etc (>100MB in total) that don't
#       really belong there, we install it into another directory to avoid
#       making /etc too big.

src_configure() {
	local mycmakeargs=(
		-DCMAKE_C_COMPILER="$(tc-getCC)"
		-DCMAKE_CXX_COMPILER="$(tc-getCXX)"
		-DLLVM_BUILD_TYPE=$(usex debug RelWithDebInfo Release)
		-DCMAKE_BUILD_TYPE=$(usex debug RelWithDebInfo Release)
		-DCMAKE_CUDA_HOST_COMPILER="$(tc-getCXX)"
		-DCMAKE_C_FLAGS="${CFLAGS}"
		-DCMAKE_CXX_FLAGS="${CXXFLAGS}"
		-DCMAKE_CXX_STANDARD=$( (usev c++14 || usev c++17) | cut -c4-)
		-DPYTHON_EXECUTABLE="${EPREFIX}/usr/bin/${EPYTHON}"
		-DCMAKE_INSTALL_PREFIX="${EPREFIX}/usr/lib/${PN}/$(ver_cut 1-2)"
		-DCMAKE_INSTALL_MANDIR="${EPREFIX}/usr/lib/${PN}/$(ver_cut 1-2)/share/man"
		-DCMAKE_INSTALL_LIBDIR="lib"
		-DDEFAULT_SYSROOT="${EPREFIX}"
		-DCLING_BUILD_PLUGINS=OFF
		-Dasserts=OFF
		-Ddev=OFF
		-Dexceptions=ON
		-Dfail-on-missing=ON
		-Dgnuinstall=OFF
		-Dshared=ON
		-Dsoversion=ON
		-Dbuiltin_llvm=ON
		-Dbuiltin_clang=ON
		-Dbuiltin_cling=ON
		-Dbuiltin_openui5=ON
		-Dbuiltin_afterimage=OFF
		-Dbuiltin_cfitsio=OFF
		-Dbuiltin_cppzmq=OFF
		-Dbuiltin_davix=OFF
		-Dbuiltin_fftw3=OFF
		-Dbuiltin_freetype=OFF
		-Dbuiltin_ftgl=OFF
		-Dbuiltin_gl2ps=OFF
		-Dbuiltin_glew=OFF
		-Dbuiltin_gsl=OFF
		-Dbuiltin_lz4=OFF
		-Dbuiltin_lzma=OFF
		-Dbuiltin_nlohmannjson=OFF
		-Dbuiltin_openssl=OFF
		-Dbuiltin_pcre=OFF
		-Dbuiltin_tbb=OFF
		-Dbuiltin_unuran=OFF
		-Dbuiltin_vc=OFF
		-Dbuiltin_vdt=OFF
		-Dbuiltin_veccore=OFF
		-Dbuiltin_xrootd=OFF
		-Dbuiltin_xxhash=OFF
		-Dbuiltin_zeromq=OFF
		-Dbuiltin_zlib=OFF
		-Dbuiltin_zstd=OFF
		-Dalien=OFF
		-Darrow=OFF
		-Dasimage=$(usex asimage)
		-Dccache=OFF # use ccache via portage
		-Dcefweb=OFF
		-Dclad=OFF
		-Dcocoa=$(usex aqua)
		-Dcuda=$(usex cuda)
		-Dcudnn=$(usex cudnn)
		-Dcxxmodules=OFF # requires clang, unstable
		-Ddataframe=ON
		-Ddavix=$(usex davix)
		-Ddcache=OFF
		-Ddistcc=OFF
		-Dfcgi=$(usex http)
		-Dfftw3=$(usex fftw)
		-Dfitsio=$(usex fits)
		-Dfortran=$(usex fortran)
		-Dgdml=$(usex gdml)
		-Dgfal=OFF
		-Dgminimal=OFF
		-Dgsl_shared=$(usex gsl)
		-Dgviz=$(usex graphviz)
		-Dhttp=$(usex http)
		-Dimt=$(usex tbb)
		-Dlibcxx=$(usex libcxx)
		-Dmathmore=$(usex gsl)
		-Dminimal=OFF
		-Dminuit2=$(usex minuit)
		-Dminuit=$(usex minuit)
		-Dmlp=$(usex tmva)
		-Dmonalisa=OFF
		-Dmpi=$(usex mpi)
		-Dmysql=$(usex mysql)
		-Dodbc=$(usex odbc)
		-Dopengl=$(usex opengl)
		-Doracle=$(usex oracle)
		-Dpgsql=$(usex postgres)
		-Dpyroot=$(usex python) # python was renamed to pyroot
		-Dpyroot_legacy=OFF
		-Dpythia6=$(usex pythia6)
		-Dpythia8=$(usex pythia8)
		-Dqt5web=$(usex qt5)
		-Dqt6web=OFF
		-Dr=$(usex R)
		-Droofit=$(usex roofit)
		-Droofit_multiprocess=OFF
		-Droot7=$(usex root7)
		-Drootbench=OFF
		-Droottest=OFF
		-Drpath=OFF
		-Druntime_cxxmodules=OFF
		-Dshadowpw=$(usex shadow)
		-Dspectrum=ON
		-Dsqlite=$(usex sqlite)
		-Dssl=$(usex ssl)
		-Dtcmalloc=OFF
		-Dtest_distrdf_dask=OFF
		-Dtest_distrdf_pyspark=OFF
		-Dtesting=$(usex test)
		-Dtmva=$(usex tmva)
		-Dtmva-cpu=$(usex tmva)
		-Dtmva-gpu=$(usex cuda)
		-Dtmva-pymva=$(usex tmva)
		-Dtmva-rmva=$(usex R)
		-Dtmva-sofie=OFF
		-Dunuran=$(usex unuran)
		-During=$(usex uring)
		-Dvc=$(usex vc)
		-Dvdt=OFF
		-Dveccore=OFF
		-Dvecgeom=OFF
		-Dx11=$(usex X)
		-Dxml=$(usex xml)
		-Dxrootd=$(usex xrootd)
	)

	cmake_src_configure
}

src_install() {
	cmake_src_install

	ROOTSYS=${EPREFIX}/usr/lib/${PN}/$(ver_cut 1-2)

	if [[ ${PV} == "9999" ]]; then
		ROOTENV="9900${PN}-git"
	else
		ROOTENV="$((9999 - $(ver_cut 2)))${PN}-$(ver_cut 1-2)-git"
	fi

	cat > ${ROOTENV} <<- EOF || die
	MANPATH="${ROOTSYS}/share/man"
	PATH="${ROOTSYS}/bin"
	ROOTPATH="${ROOTSYS}/bin"
	LDPATH="${ROOTSYS}/lib"
	EOF

	if use python; then
		echo "PYTHONPATH=\"${ROOTSYS}/lib\"" >> ${ROOTENV} || die
	fi

	doenvd ${ROOTENV}

	if use emacs; then
		elisp-install ${PN}-$(ver_cut 1-2) "${BUILD_DIR}"/root-help.el
	fi

	pushd "${D}/${ROOTSYS}" > /dev/null

	rm -r emacs bin/*.{csh,sh,fish} || die

	if ! use examples; then
		rm -r tutorials || die
	fi

	# create versioned symlinks for binaries
	if [[ ! ${PV} == "9999" ]]; then
		cd bin;
		for exe in *; do
			dosym "${exe}" "/usr/lib/${PN}/$(ver_cut 1-2)/bin/${exe}-$(ver_cut 1-2)"
		done
	fi
}