# Template file for 'rust'
# partially adapted from Alpine/Adélie's Rust APKBUILD
#
# Permission to use rust and cargo trademark is granted.
# See: https://github.com/rust-lang/core-team/issues/4
#
# Always make sure custom distfiles used for bootstrap are
# uploaded to https://repo-default.voidlinux.org/distfiles/
#
pkgname=rust
version=1.57.0
revision=1
wrksrc="rustc-${version}-src"
hostmakedepends="cmake curl pkg-config python3 tar cargo-bootstrap"
makedepends="libffi-devel ncurses-devel libxml2-devel zlib-devel llvm12"
depends="rust-std"
short_desc="Safe, concurrent, practical systems language"
maintainer="Enno Boland <gottox@voidlinux.org>"
license="MIT, Apache-2.0"
homepage="https://www.rust-lang.org/"
distfiles="https://static.rust-lang.org/dist/rustc-${version}-src.tar.gz"
checksum=3546f9c3b91b1f8b8efd26c94d6b50312c08210397b4072ed2748e2bd4445c1a
lib32disabled=yes
make_check=no # CBA for now

build_options="bindist"
desc_option_bindist="Generate tarballs for bootstrap"

if [ "$XBPS_LIBC" = "musl" ]; then
	hostmakedepends+=" libexecinfo-devel"
fi
if [ "$XBPS_TARGET_LIBC" = "musl" ]; then
	makedepends+=" libexecinfo-devel"
fi

if [ "$CROSS_BUILD" ]; then
	hostmakedepends+=" rust llvm12"
	# These are required for building the buildhost's stage0/1
	hostmakedepends+=" libffi-devel libxml2-devel ncurses-devel zlib-devel"
else
	hostmakedepends+=" rust-bootstrap"
fi

# we need this because cargo verifies checksums of all files in vendor
# crates when it builds and gives us no way to override or update the
# file sanely... so just clear out the file list
_clear_vendor_checksums() {
	sed -i 's/\("files":{\)[^}]*/\1/' vendor/$1/.cargo-checksum.json
}

post_patch() {
	rm -rf src/llvm-project
	if [ "$build_option_bindist" ]; then
		for x in ${FILESDIR}/patches/static-llvm/*.patch; do
			msg_normal "Applying patch $x\n"
			patch -sNp1 -i ${x}
		done
	fi

	# clear out all the checksum nonsense of patched vendor crates
	_clear_vendor_checksums libc
	_clear_vendor_checksums typenum
	_clear_vendor_checksums cc
	_clear_vendor_checksums rustc-ap-rustc_target
	_clear_vendor_checksums target-lexicon
	_clear_vendor_checksums tikv-jemallocator
}

do_configure() {
	local _local_rebuild _use_debug _use_debug_rustc _use_rpath _use_docs _llvm_shared

	if [ "$CROSS_BUILD" ]; then
		_local_rebuild="true"
	else
		_local_rebuild="false"
	fi

	# disable rustc debug info as it bloats up rust-std significantly
	# set to 1 or 2 if you wish to have debug info for rustc, it won't
	# link on 32-bit platforms though (too big)
	_use_debug_rustc="0"
	# just disable debug for now
	_use_debug="0"

	# if true, the binaries will be built with rpath, so the binaries will be
	# usable directly from the build directory, this is not desirable for
	# packaging but is useful when building bootstrap binaries
	if [ "$build_option_bindist" ]; then
		_use_rpath="true"
		_use_docs="false"
		_llvm_shared="false"
	else
		_use_rpath="false"
		_use_docs="true"
		_llvm_shared="true"
	fi

	cat > config.toml <<- EOF
		changelog-seen = 2
		[llvm]
		ninja = false
		link-shared = ${_llvm_shared}
		[build]
		build = "${RUST_BUILD}"
		host = [ "${RUST_TARGET}" ]
		target = [ "${RUST_TARGET}" ]
		cargo = "/usr/bin/cargo"
		rustc = "/usr/bin/rustc"
		submodules = false
		python = "python3"
		locked-deps = true
		vendor = true
		full-bootstrap = false
		local-rebuild = ${_local_rebuild}
		extended = false
		docs = ${_use_docs}
		tools = []
		[install]
		prefix = "/usr"
		[rust]
		optimize = true
		debug = false
		codegen-units = 1
		codegen-units-std = 1
		debuginfo-level = ${_use_debug}
		debuginfo-level-rustc = ${_use_debug_rustc}
		debuginfo-level-tests = 0
		incremental = false
		parallel-compiler = false
		channel = "stable"
		rpath = ${_use_rpath}
		verbose-tests = true
		dist-src = false
		jemalloc = false
		llvm-libunwind = "no"
		codegen-tests = false
		[dist]
		src-tarball = false
		[target.${RUST_BUILD}]
		llvm-config = "/usr/bin/llvm-config"
		crt-static = false
		cc = "${CC_host:-$CC}"
		cxx = "${CXX_host:-$CXX}"
		ar = "${AR_host:-$AR}"
		linker = "${CC_host:-$CC}"
	EOF

	if [ "$CROSS_BUILD" ]; then
		cat >> config.toml <<- EOF
			[target.${RUST_TARGET}]
			llvm-config = "/usr/bin/llvm-config"
			crt-static = false
			cc = "${CC}"
			cxx = "${CXX}"
			ar = "${AR}"
			linker = "${CC}"
			sysroot = "${XBPS_CROSS_BASE}"
		EOF
	fi
}

# Set the correct CFLAGS for the build host, we have to compile libbacktrace
# for it during stage1. Otherwise it attemps to use CFLAGS, which are the CFLAGS
# of the cross host.
do_build() {
	export RUST_BACKTRACE=1
	export CARGO_HOME="$wrksrc/.cargo"
	export SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
	# prevent sysroot from leaking in
	export RUSTFLAGS=""
	env CFLAGS_${RUST_BUILD}="${CFLAGS_host}" \
		CXXFLAGS_${RUST_BUILD}="${CXXFLAGS_host}" \
		CFLAGS_${RUST_TARGET}="${CFLAGS}" \
		CXXFLAGS_${RUST_TARGET}="${CXXFLAGS}" \
		python3 x.py dist --jobs $XBPS_MAKEJOBS
}

do_check() {
	export RUST_BACKTRACE=1

	python3 x.py test ${makejobs} --no-doc --no-fail-fast \
		src/test/codegen \
		src/test/codegen-units \
		src/test/incremental \
		src/test/mir-opt \
		src/test/pretty \
		src/test/run-make \
		src/test/run-make-fulldeps \
		src/test/ui \
		src/test/ui-fulldeps
}

do_install() {
	if [ "$build_option_bindist" ]; then
		mkdir -p ${XBPS_SRCDISTDIR}/distfiles
		install -m 0644 \
			build/dist/rustc-${version}-${RUST_TARGET}.tar.xz \
			build/dist/rust-std-${version}-${RUST_TARGET}.tar.xz \
			${XBPS_SRCDISTDIR}/distfiles
		exit 1
	fi

	vmkdir usr
	tar xf build/dist/rustc-${version}-${RUST_TARGET}.tar.gz \
	 -C "$DESTDIR/usr" --strip-components=2 --exclude=manifest.in
	tar xf build/dist/rust-std-${version}-${RUST_TARGET}.tar.gz \
	 -C "$DESTDIR/usr/lib" --strip-components=3 --exclude=manifest.in
	tar xf build/dist/rustc-dev-${version}-${RUST_TARGET}.tar.gz \
	 -C "$DESTDIR/usr/lib" --strip-components=3 --exclude=manifest.in
	tar xf build/dist/rust-docs-${version}-${RUST_TARGET}.tar.gz \
	 -C "$DESTDIR/usr" --strip-components=2 --exclude=manifest.in

	vlicense COPYRIGHT
	vlicense LICENSE-APACHE
	vlicense LICENSE-MIT

	cd ${DESTDIR}/usr/lib
	# symlinks instead of copies
	mv *.so rustlib/${RUST_TARGET}/lib
	ln -sf rustlib/${RUST_TARGET}/lib/*.so .

	# executable used for split dwarf, currently unstable on linux.
	# it's copied directly from the local llvm package, but
	# FIXME: cross builds are installing the version from the build machine,
	# it shouldn't be necessary to remove it
	rm rustlib/${RUST_TARGET}/bin/rust-llvm-dwp
}

rust-doc_package() {
	short_desc+=" - documentation"
	pkg_install() {
		vmove usr/share/doc
	}
}

rust-std_package() {
	short_desc+=" - standard library"
	if [ "$XBPS_TARGET_LIBC" = "musl" ]; then
		depends="libexecinfo-devel"
	fi
	pkg_install() {
		vmove usr/lib/rustlib
	}
}