javy-8.0.0-r4bennypowers

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

EAPI=8

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"

RUST_MIN_VER="1.85.0"
RUST_REQ_USE="rust_sysroots_wasm"

inherit cargo

DESCRIPTION="JavaScript to WebAssembly toolchain"
HOMEPAGE="https://github.com/bytecodealliance/javy"
SRC_URI="
	https://github.com/bytecodealliance/javy/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz
	${CARGO_CRATE_URIS}
"

LICENSE="Apache-2.0-with-LLVM-exceptions"
# Dependent crate licenses
LICENSE+="
	Apache-2.0 BSD ISC MIT MPL-2.0 Unicode-3.0 ZLIB
	|| ( Apache-2.0 MIT )
"
SLOT="0"
KEYWORDS="~amd64"

# clang is needed for cross-compiling C code to wasm32-wasip1 (QuickJS in
# rquickjs-sys) and for building binaryen C++ via wasm-opt-sys/cxx
BDEPEND="
	llvm-core/clang
"

QA_FLAGS_IGNORED="usr/bin/javy"

pkg_setup() {
	rust_pkg_setup

	# Verify wasm32-wasip1 target is available. Gentoo's rust_sysroots_wasm
	# only provides wasm32-unknown-unknown; wasip1 must be added manually.
	local sysroot
	sysroot="$(rustc --print sysroot)" || die
	if [[ ! -d "${sysroot}/lib/rustlib/wasm32-wasip1" ]]; then
		eerror "The wasm32-wasip1 Rust target is not installed."
		eerror "Gentoo's rust_sysroots_wasm USE flag only provides wasm32-unknown-unknown."
		eerror ""
		eerror "Install the target manually:"
		eerror "  rustup target add wasm32-wasip1"
		eerror ""
		eerror "Or download and install it from the Rust release:"
		eerror "  RUST_VER=\$(rustc --version | cut -d' ' -f2)"
		eerror "  wget https://static.rust-lang.org/dist/rust-std-\${RUST_VER}-wasm32-wasip1.tar.xz"
		eerror "  tar xf rust-std-\${RUST_VER}-wasm32-wasip1.tar.xz"
		eerror "  cp -a rust-std-\${RUST_VER}-wasm32-wasip1/rust-std-wasm32-wasip1/lib/rustlib/wasm32-wasip1 \\"
		eerror "    \$(rustc --print sysroot)/lib/rustlib/"
		die "wasm32-wasip1 target not found in Rust sysroot"
	fi
}

src_compile() {
	# Build the default plugin for wasm32-wasip1.
	# This must happen before the CLI build, whose build.rs expects the
	# plugin at target/wasm32-wasip1/release/plugin.wasm.
	# Run in a subshell to isolate host RUSTFLAGS from the wasm build.
	(
		unset CARGO_BUILD_RUSTFLAGS CARGO_ENCODED_RUSTFLAGS RUSTFLAGS
		unset CARGO_TARGET_WASM32_WASIP1_RUSTFLAGS
		unset CARGO_BUILD_TARGET
		export CARGO_PROFILE_RELEASE_LTO=false
		export CARGO_PROFILE_RELEASE_STRIP=none
		export CC_wasm32_wasip1=clang
		cargo build -p javy-plugin --target wasm32-wasip1 --release
	) || die "plugin build failed"

	# Build the CLI binary (its build.rs picks up and processes the plugin)
	local -x CARGO_PROFILE_RELEASE_LTO=off
	cargo_src_compile -p javy-cli
}

src_install() {
	dobin "$(cargo_target_dir)/javy"
	dodoc README.md
}