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# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

H=1142f73e05fef6a57141b8328944b13872d4135e

inherit toolchain-funcs

DESCRIPTION="Purely functional programming language with first class types"
HOMEPAGE="https://idris-lang.org/"

if [[ "${PV}" == *9999* ]] ; then
	inherit git-r3
	EGIT_REPO_URI="https://github.com/idris-lang/${PN^}.git"
else
	SRC_URI="https://github.com/idris-lang/${PN^}/archive/${H}.tar.gz -> ${P}.tar.gz"
	KEYWORDS="~amd64 ~x86"
	S="${WORKDIR}/${PN^}-${H}"
fi

LICENSE="BSD"
SLOT="0"
IUSE="+chez doc racket test-full"
REQUIRED_USE="^^ ( chez racket )"

RDEPEND="
	dev-libs/gmp
	chez? ( dev-scheme/chez:=[threads] )
	racket? ( dev-scheme/racket:=[threads] )
"
DEPEND="${RDEPEND}"
BDEPEND="
	doc? ( dev-python/sphinx_rtd_theme )
	test-full? (
		dev-scheme/chez[threads]
		dev-scheme/racket[threads]
		net-libs/nodejs
	)
"

# Generated via "SCHEME", not CC
QA_FLAGS_IGNORED="usr/lib/idris2/bin/idris2_app/idris2
	usr/lib/idris2/bin/idris2_app/idris2-boot"
QA_PRESTRIPPED="${QA_FLAGS_IGNORED}"

src_prepare() {
	# Clean up environment of Idris and Racket variables
	unset IDRIS2_DATA IDRIS2_INC_CGS IDRIS2_LIBS IDRIS2_PACKAGE_PATH
	unset IDRIS2_PATH IDRIS2_PREFIX
	unset PLTUSERHOME

	tc-export AR CC CXX LD RANLIB
	export CFLAGS
	sed -i '/^CFLAGS/d' ./support/*/Makefile || die

	# Fix "PREFIX"
	sed -i 's|$(HOME)/.idris2|/usr/lib/idris2|g' ./config.mk || die

	# Bad tests
	# Weird Racket Futures (parallelism) test, might need further investigation
	sed -i 's|, "futures001"||g' ./tests/Main.idr || die
	# > Missing incremental compile data, reverting to whole program compilation
	sed -i 's|"chez033",||g' ./tests/Main.idr || die

	default
}

src_configure() {
	export IDRIS2_VERSION=${PV}
	export SCHEME=$(usex chez chezscheme racket)

	if use chez ; then
		export IDRIS2_CG=chez
		export BOOTSTRAP_TARGET=bootstrap
	elif use racket ; then
		export IDRIS2_CG=racket
		export BOOTSTRAP_TARGET=bootstrap-racket
	else
		die 'Neither "chez" nor "racket" was chosen'
	fi
}

src_compile() {
	# > jobserver unavailable
	# This is caused by Makefile using a script which in turn calls make
	# https://github.com/idris-lang/Idris2/issues/2152
	emake SCHEME=${SCHEME} ${BOOTSTRAP_TARGET} -j1

	use doc && emake -C ./docs html
}

src_test() {
	emake SCHEME=${SCHEME} bootstrap-test
}

src_install() {
	# "DESTDIR" variable is not respected, use "PREFIX" instead
	emake IDRIS2_PREFIX="${D}"/usr/lib/idris2 PREFIX="${D}"/usr/lib/idris2 install
	dosym ../lib/${PN}/bin/${PN} /usr/bin/${PN}

	# Install documentation
	use doc && dodoc -r ./docs/build/html
	einstalldocs
}