# Description: The Rust language with Cargo included.
# URL: http://www.rust-lang.org/
# Maintainer: Danny Rawlins, crux at romster dot me
# Depends on: llvm
# Optional: sccache llvm-32

name=rust
version=1.42.0
##cat src/stage0.txt
_date=2020-02-27
_rustc=1.41.1
_cargo=0.42.0
##

release=2
source=(
	https://static.rust-lang.org/dist/${name}c-$version-src.tar.gz
	https://static.rust-lang.org/dist/$_date/rust-std-$_rustc-x86_64-unknown-linux-gnu.tar.gz
	https://static.rust-lang.org/dist/$_date/rustc-$_rustc-x86_64-unknown-linux-gnu.tar.gz
	https://static.rust-lang.org/dist/$_date/cargo-$_cargo-x86_64-unknown-linux-gnu.tar.gz
)
 
build() {
	cd "${name}c-$version-src"

	local ERROR
	local DATE="$(awk '/^date: / { print $2 }' src/stage0.txt)"
	local RUSTC="$(awk '/^rustc: / { print $2 }' src/stage0.txt)"
	local CARGO="$(awk '/^cargo: / { print $2 }' src/stage0.txt)"
	if [ "$DATE" != "$_date" ]; then
		printf "\e[031mError: _date $_date != $DATE\033[0m\n"
		ERROR=1
	fi
	if [ "$RUSTC" != "$_rustc" ]; then
		printf "\e[031mError: _rustc $_rustc != $RUSTC\033[0m\n"
		ERROR=1
	fi
	if [ "$CARGO" != "$_cargo" ]; then
		printf "\e[031mError: _cargo $_cargo != $CARGO\033[0m\n"
		ERROR=1
	fi
	[ $ERROR ] && exit 1
	unset DATE RUSTC CARGO ERROR

	mkdir -p build/cache/$_date
	cp $PKGMK_SOURCE_DIR/rust-std-$_rustc-x86_64-unknown-linux-gnu.tar.gz build/cache/$_date/
	cp $PKGMK_SOURCE_DIR/rustc-$_rustc-x86_64-unknown-linux-gnu.tar.gz build/cache/$_date/
	cp $PKGMK_SOURCE_DIR/cargo-$_cargo-x86_64-unknown-linux-gnu.tar.gz build/cache/$_date/

	prt-get isinst sccache && export RUSTC_WRAPPER=/usr/bin/sccache

cat <<- EOF > $SRC/config.toml
	[llvm]
	ninja = true
	targets = "X86"
	experimental-targets = ""
	link-shared = true

	[install]
	prefix = "/usr"

	[rust]
	channel = "stable"
	rpath = false
	codegen-tests = false
	backtrace-on-ice = true

	[build]
	docs = false
	extended = true
	python = "python3"
EOF
	# part of [build] options
        if [ -e '/usr/bin/rustc' ]; then
		if [ -z "$(/usr/bin/ldd /usr/bin/rustc | egrep '.*libLLVM-.*.so => not found')" ]; then
cat <<- EOF >> $SRC/config.toml
	cargo = "/usr/bin/cargo"
	rustc = "/usr/bin/rustc"
EOF
		else
			printf "\e[031mllvm broken symlink detected, not using system rust to bootstrap\033[0m\n"
		fi
        fi

cat <<- EOF >> $SRC/config.toml
	[target.x86_64-unknown-linux-gnu]
	llvm-config = "/usr/bin/llvm-config"
EOF

	if [ -e '/usr/bin/llvm-config-32' ]; then
cat <<- EOF >> $SRC/config.toml
	[target.i686-unknown-linux-gnu]
	llvm-config = "/usr/bin/llvm-config-32"
EOF
	fi

	cat $SRC/config.toml

	mkdir "$PKGMK_SOURCE_DIR/rust" || true
	export CARGO_HOME="$PKGMK_SOURCE_DIR/rust"

	export RUSTFLAGS="$RUSTFLAGS -C link-args=-lffi"
	/usr/bin/python3 ./x.py build --config="${SRC}"/config.toml --exclude src/tools/miri -j ${JOBS-1}

	export LIBSSH2_SYS_USE_PKG_CONFIG=1
	DESTDIR=$PKG /usr/bin/python3 ./x.py --config="${SRC}"/config.toml install
	unset LIBSSH2_SYS_USE_PKG_CONFIG

	#cleanup
	rm -r $PKG/usr/share/doc
	rm -r $PKG/usr/share/zsh
	rm -r $PKG/etc
	rm $PKG/usr/lib/rustlib/{components,manifest-rustc,rust-installer-version,uninstall.sh}
}