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

EAPI=8

inherit bash-completion-r1 edo multiprocessing toolchain-funcs xdg-utils

DESCRIPTION="compiled, garbage-collected systems programming language"
HOMEPAGE="https://nim-lang.org/"
SRC_URI="
	https://nim-lang.org/download/${P}.tar.xz
	experimental? (
		https://git.sr.ht/~cyber/${PN}-patches/archive/1.6.6.tar.gz
			-> ${PN}-patches-1.6.6.tar.gz
	)
"

LICENSE="MIT"
SLOT="0"
KEYWORDS="~amd64 ~arm ~x86"
IUSE="debug experimental"
RESTRICT="test"  # need to sort out depends and numerous failures

# BDEPEND="sys-process/parallel"
# BDEPEND="test? ( net-libs/nodejs )"

PATCHES=(
	"${FILESDIR}"/${PN}-0.20.0-paths.patch
	"${FILESDIR}"/${PN}-1.6.6-csources-flags.patch
)

# Borrowed from nim-utils.eclass (guru overlay).
nim_gen_config() {
	cat > nim.cfg <<- EOF || die "Failed to create Nim config"
	cc:"gcc"
	gcc.exe:"$(tc-getCC)"
	gcc.linkerexe:"$(tc-getCC)"
	gcc.cpp.exe:"$(tc-getCXX)"
	gcc.cpp.linkerexe:"$(tc-getCXX)"
	gcc.options.speed:"${CFLAGS}"
	gcc.options.size:"${CFLAGS}"
	gcc.options.debug:"${CFLAGS}"
	gcc.options.always:"${CPPFLAGS}"
	gcc.options.linker:"${LDFLAGS}"
	gcc.cpp.options.speed:"${CXXFLAGS}"
	gcc.cpp.options.size:"${CXXFLAGS}"
	gcc.cpp.options.debug:"${CXXFLAGS}"
	gcc.cpp.options.always:"${CPPFLAGS}"
	gcc.cpp.options.linker:"${LDFLAGS}"

	$([[ "${NOCOLOR}" == true || "${NOCOLOR}" == yes ]] && echo '--colors:"off"')
	-d:"$(usex debug debug release)"
	--parallelBuild:"$(makeopts_jobs)"
	EOF
}

src_prepare() {
	default

	# note: there are consumers in the ::guru overlay
	use experimental && eapply "${WORKDIR}"/${PN}-patches-1.6.6
}

src_configure() {
	xdg_environment_reset  # bug 667182

	unset NIMBLE_DIR
	tc-export CC CXX LD

	nim_gen_config
}

src_compile() {
	local -x PATH="${S}/bin:${PATH}"

	# Build from C sources
	# Compiling with sys-process/parallel fails for some reason but hopefully
	# we'll be able to enable it later...
	edo bash build.sh  # --parallel "$(makeopts_jobs)"

	edo ./bin/nim compile koch
	edo ./koch boot -d:nimUseLinenoise --skipParentCfg:off
	edo ./koch tools
}

src_test() {
	local -x PATH="${S}/bin:${PATH}"

	edo ./koch test
}

src_install() {
	local -x PATH="${S}/bin:${PATH}"

	edo ./koch install "${ED}"

	# "./koch install" installs only "nim" binary
	# but not the rest
	exeinto /usr/bin
	local exe
	for exe in bin/* ; do
		[[ "${exe}" == bin/nim ]] && continue
		doexe "${exe}"
	done

	newbashcomp tools/nim.bash-completion nim
	newbashcomp dist/nimble/nimble.bash-completion nimble
}