# Copyright 2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# QA check: ensure cargo based ebuilds define correct RUST_MIN_VER
# Maintainer: Rust Project <rust@gentoo.org>

cargo_ver_check() {
	has cargo ${INHERITED} || return

	local min_rust_ver= min_rust_source=
	# First version of Rust to support that edition
	declare -A RUST_EDITIONS=(
		[2024]="1.85.0"
		#[2021]="1.56.0" # our oldest rust version is 1.74.0
	)

	# Maximum value for "edition" across Cargo.toml files
	local cargo_toml_edition=$(
		find "${WORKDIR}" -name Cargo.toml -exec sed -n -e 's/^\s*edition\s*=\s*"\([0-9]*\)"\s*$/\1/p' {} \+ |
		sort -n |
		tail -n 1
	)
	if [[ -n ${cargo_toml_edition} && -n ${RUST_EDITIONS[${cargo_toml_edition}]} ]]; then
		min_rust_ver="${RUST_EDITIONS[${cargo_toml_edition}]}"
		min_rust_source="found Cargo.toml file which specifies edition=\"${cargo_toml_edition}\""
	fi

	# Maximum value for "rust-version" across Cargo.toml files
	local cargo_toml_rust_version=$(
		find "${WORKDIR}" -name Cargo.toml -exec sed -n -e 's/^\s*rust-version\s*=\s*"\([0-9.]*\)"\s*$/\1/p' {} \+ |
		sort -V |
		tail -n 1
	)
	if [[ -n ${cargo_toml_rust_version} ]] && ver_test "${min_rust_ver:-0}" -lt "${cargo_toml_rust_version}"; then
		min_rust_ver=${cargo_toml_rust_version}
		min_rust_source="found Cargo.toml file which specifies rust-version=\"${cargo_toml_rust_version}\""
	fi


	if [[ -n ${min_rust_ver} ]] && ver_test "${RUST_MIN_VER:-0}" -lt "${min_rust_ver}"; then
		eqawarn
		eqawarn "QA Notice: ${min_rust_source}"
		eqawarn "which requires RUST_MIN_VER=\"${min_rust_ver}\""
		eqawarn
	fi
}

cargo_ver_check
: # guarantee successful exit

# vim:ft=sh