# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

CMAKE_IN_SOURCE_BUILD=1
CRATES=""
RUST_MIN_VER="1.93.0"

inherit cargo cmake edo shell-completion

CM_COMMIT="dd1f6fa66e5e26dd7a1f6449133f825edbd8f614"
TS_COMMIT="0dc0343c9876267d99a7577ed4fc2289406a7869"
WT_COMMIT="a7044cced9990dea7613bb8d770f0cda99f2a353"

DESCRIPTION="A lightweight WebAssembly runtime"
HOMEPAGE="https://github.com/bytecodealliance/wasmtime"
SRC_URI="https://github.com/bytecodealliance/wasmtime/archive/v${PV}.tar.gz -> ${P}.tar.gz
	https://github.com/SpiderX/portage-overlay/releases/download/${P}/${P}-crates.tar.xz
	test? ( https://github.com/WebAssembly/component-model/archive/${CM_COMMIT}.tar.gz -> ${P}-cm.tar.gz
		https://github.com/WebAssembly/testsuite/archive/${TS_COMMIT}.tar.gz -> ${P}-ts.tar.gz
		https://github.com/WebAssembly/wasi-testsuite/archive/${WT_COMMIT}.tar.gz -> ${P}-wt.tar.gz )"

LICENSE="0BSD Apache-2.0 Apache-2.0-with-LLVM-exceptions BSD CC0-1.0
	CDLA-Permissive-2.0 ISC MIT MPL-2.0 UoI-NCSA Unicode-3.0 ZLIB"
SLOT="0"
KEYWORDS="~amd64"
IUSE="cxx llvm_targets_WebAssembly rust_sysroots_wasm test"
REQUIRED_USE="test? ( llvm_targets_WebAssembly rust_sysroots_wasm )"
RESTRICT="!test? ( test )"

DEPEND="llvm_targets_WebAssembly? ( >=dev-lang/rust-${RUST_MIN_VER}[llvm_targets_WebAssembly,rust_sysroots_wasm?] )"
RDEPEND="${DEPEND}"
BDEPEND="test? ( dev-cpp/gtest )"

PATCHES=( "${FILESDIR}/${PN}"-45.0.1-test-cmake.patch )

DOCS=( "${S}"/{README,RELEASES}.md )
CMAKE_USE_DIR="${S}/crates/c-api"
BUILD_DIR="${S}/crates/c-api"

src_prepare() {
	# run it unconditionally to avoid double patching
	cmake_src_prepare

	if use test ; then
		edo rm -rf tests/{component-model,{spec,wasi}_testsuite}
		edo ln -s ../../component-model-"${CM_COMMIT}" \
			tests/component-model
		edo ln -s ../../testsuite-"${TS_COMMIT}" \
			tests/spec_testsuite
		edo ln -s ../../wasi-testsuite-"${WT_COMMIT}" \
			tests/wasi_testsuite
	fi
}

src_configure() {
	if use cxx ; then
		local mycmakeargs=(
			-DCMAKE_CXX_STANDARD=20
		)
		cmake_src_configure
		if use test ; then
			local mycmakeargs=(
				-DBUILD_TESTS=ON
			)
			# the example CMake tests are a separate project from the C API itself
			CMAKE_USE_DIR="${S}"/examples BUILD_DIR="${S}"/examples/build \
				cmake_src_configure
		fi
	fi

	cargo_src_configure
}

src_compile() {
	cargo_src_compile

	if use cxx ; then
		# libwasmtime.so is produced by cargo but installed through the CMake C API
		# pass Gentoo LDFLAGS via RUSTFLAGS and add an explicit SONAME
		for ldflag in ${LDFLAGS} ; do RUSTFLAGS+=" -C link-arg=${ldflag}" ; done
		export RUSTFLAGS="${RUSTFLAGS} -C link-arg=-Wl,-soname,libwasmtime.so.${PV%%.*}"
		cmake_src_compile
		if use test ; then
			CMAKE_USE_DIR="${S}"/examples BUILD_DIR="${S}"/examples/build \
				cmake_src_compile
		fi
	fi

	local completion
	for completion in bash fish zsh ; do
		edo target/release/wasmtime completion ${completion} > wasmtime.${completion}
	done
}

src_test() {
	use cxx && CMAKE_USE_DIR="${S}/examples" \
		BUILD_DIR="${S}/examples/build" cmake_src_test

	cargo_src_test
}

src_install() {
	einstalldocs
	cargo_src_install
	if use cxx ; then
		cmake_src_install
		edo mv "${ED}"/usr/"$(get_libdir)"/libwasmtime.so{,."${PV%%.*}"}
		dosym libwasmtime.so."${PV%%.*}" usr/"$(get_libdir)"/libwasmtime.so
	fi

	newbashcomp wasmtime.bash wasmtime
	newfishcomp wasmtime.fish wasmtime
	newzshcomp wasmtime.zsh _wasmtime
}