# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

# inherit multilib
inherit cmake git-r3

# from mva
#inherit multibuild

DESCRIPTION="Cross-platform library for building Telegram clients"
HOMEPAGE="https://core.telegram.org/tdlib"
EGIT_REPO_URI="https://github.com/tdlib/td.git"
EGIT_COMMIT_TYPE="single+tags"

LICENSE="Boost-1.0"
SLOT="0"
KEYWORDS="~amd64 ~x86"
IUSE="clang cli debug doc +gcc low-ram lto java javascript"

REQUIRED_USE="
	gcc? ( !clang )
	!gcc? ( clang )
	java? ( !lto )
"

# mva dosn't have it but it is probably achieved by his src_prepare
# S="${WORKDIR}/td-${PV}"

# From mva
# BDEPEND="
# 	|| (
# 		>=sys-devel/clang-3.4:=
# 		>=sys-devel/gcc-4.9:=
# 	)
# 	dev-util/gperf
# 	virtual/jdk:=
# "

BDEPEND="gcc? ( >=sys-devel/gcc-4.9:= )
	>=dev-util/cmake-3.0.2
	dev-util/gperf
	clang? ( >=sys-devel/clang-3.4:= )
	low-ram? ( dev-lang/php[cli,ctype] )
	doc? (
		dev-lang/php
		app-doc/doxygen
		)
	java? ( virtual/jdk:= )"

# maybe php ctype needed in doc too

# php for doxygen is needed at least due to SERVER_BASED_SEARCH = NO in tdlib's Doxyfile

# Note that for Node.js ≤ 9.11.2 you must build TDLib with OpenSSL 1.0.* and for Node.js ≥ 10 with OpenSSL 1.1.* instead, so you may need to modify the following commands to install a proper OpenSSL version.

# according to TDLib build instructions, lto excludes java

RDEPEND="dev-libs/openssl:0=
	sys-libs/zlib"

DOCS=( README.md )

# from mva
src_prepare() {
	sed -r \
		-e '/install\(TARGETS/,/  INCLUDES/{s@(LIBRARY DESTINATION).*@\1 ${CMAKE_INSTALL_LIBDIR}@;s@(ARCHIVE DESTINATION).*@\1 ${CMAKE_INSTALL_LIBDIR}@;s@(RUNTIME DESTINATION).*@\1 ${CMAKE_INSTALL_BINDIR}@}' \
		-i CMakeLists.txt
	cmake_src_prepare
}

src_configure(){
	local mycmakeargs=(
		-DCMAKE_BUILD_TYPE=$(usex debug Debug Release)
		-DCMAKE_INSTALL_PREFIX=/usr
		-DTD_ENABLE_LTO=$(usex lto ON OFF)
		-DTD_ENABLE_JNI=$(usex java ON OFF)
		# According to TDLib build instructions, DOTNET=ON is only needed
		# for using tdlib from C# under Windows through C++/CLI
		-DTD_ENABLE_DOTNET=OFF
	)

	cmake_src_configure

	if use low-ram; then
		cmake --build "${BUILD_DIR}" --target prepare_cross_compiling
		php SplitSource.php
		# todo: we need to die on errors here but I don't know how
	fi

}

src_compile() {

	cmake_src_compile

	# from pg_overlay
	if use doc ; then
		doxygen Doxyfile || die "Could not build docs with doxygen"
	fi
	# completes without errors but I don't know if it's sensible
}

src_install() {

	# was suggested by upstream but seems redundant
	# use low-ram && php SplitSource.php --undo

	cmake_src_install

	use cli && dobin "${BUILD_DIR}"/tg_cli
	# can't we just skip it during build?

	# from pg_overlay
	use doc && local HTML_DOCS=( docs/html/. )
	einstalldocs

}