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

EAPI=8

inherit verify-sig edo

DESCRIPTION="NCurses Disk Usage"
HOMEPAGE="https://dev.yorhel.nl/ncdu"
SRC_URI="
	https://dev.yorhel.nl/download/${P}.tar.gz
	verify-sig? ( https://dev.yorhel.nl/download/${P}.tar.gz.asc )
"

LICENSE="MIT"
SLOT="0"
KEYWORDS="~amd64"

EZIG_MIN="0.10"
EZIG_MAX_EXCLUSIVE="0.11"

DEPEND="sys-libs/ncurses:=[unicode(+)]"
RDEPEND="${DEPEND}"
BDEPEND="
	|| ( dev-lang/zig:${EZIG_MIN} dev-lang/zig-bin:${EZIG_MIN} )
	virtual/pkgconfig
	dev-lang/perl
	verify-sig? ( sec-keys/openpgp-keys-yorhel )
"

VERIFY_SIG_OPENPGP_KEY_PATH="${BROOT}"/usr/share/openpgp-keys/yoranheling.asc

PATCHES=(
	"${FILESDIR}/${P}-makefile-add-zig-variable.patch"
)

# see https://github.com/ziglang/zig/issues/3382
# For now, Zig doesn't support CFLAGS/LDFLAGS/etc.
QA_FLAGS_IGNORED="usr/bin/ncdu"

# Many thanks to Florian Schmaus (Flowdalic)!
# Adapted from https://github.com/gentoo/gentoo/pull/28986
# Set the EZIG environment variable.
zig-set_EZIG() {
	[[ -n ${EZIG} ]] && return

	if [[ -n ${EZIG_OVERWRITE} ]]; then
		export EZIG="${EZIG_OVERWRITE}"
		return
	fi

	local candidate selected selected_ver ver

	for candidate in "${BROOT}"/usr/bin/zig-*; do
		if [[ ! -L ${candidate} || ${candidate} != */zig?(-bin)-+([0-9.]) ]]; then
			continue
		fi

		ver=${candidate##*-}

		if [[ -n ${EZIG_EXACT_VER} ]]; then
			ver_test "${ver}" -ne "${EZIG_EXACT_VER}" && continue

			selected="${candidate}"
			selected_ver="${ver}"
			break
		fi

		if [[ -n ${EZIG_MIN} ]] \
			   && ver_test "${ver}" -lt "${EZIG_MIN}"; then
			# Candidate does not satisfy EZIG_MIN condition.
			continue
		fi

		if [[ -n ${EZIG_MAX_EXCLUSIVE} ]] \
			   && ver_test "${ver}" -ge "${EZIG_MAX_EXCLUSIVE}"; then
			# Candidate does not satisfy EZIG_MAX_EXCLUSIVE condition.
			continue
		fi

		if [[ -n ${selected_ver} ]] \
			   && ver_test "${selected_ver}" -gt "${ver}"; then
			# Candidate is older than the currently selected candidate.
			continue
		fi

		selected="${candidate}"
		selected_ver="${ver}"
	done

	if [[ -z ${selected} ]]; then
		die "Could not find (suitable) zig installation in ${BROOT}/usr/bin"
	fi

	export EZIG="${selected}"
	export EZIG_VER="${selected_ver}"
}

# Invoke zig with the optionally provided arguments.
ezig() {
	zig-set_EZIG

	# Unfortunately, we cannot add more args here, since syntax is different
	# for every subcommands. Yes, even target/cpu :( f.i. :
	# -target/-mcpu for zig build-exe vs -Dtarget/-Dcpu for zig build-
	# -OReleaseSafe for zig build-exe vs -DReleaseSafe for zig build
	# (or even none, if hardcoded by upstream so choice is -Drelease=true/false)
	# Ofc we can patch this, but still...

	edo "${EZIG}" "${@}"
}

src_unpack() {
	if use verify-sig; then
		verify-sig_verify_detached "${DISTDIR}"/${P}.tar.gz{,.asc}
	fi
	default
}

src_configure() {
	zig-set_EZIG
	export ZIG=${EZIG}
}

src_test() {
	ezig build test -Drelease-fast
}

src_install() {
	emake PREFIX="${ED}"/usr install

	dodoc README.md ChangeLog
}