package rustc-bootstrap-source {
	description = "rustc source tree used by mrustc";
	exclude = true;

	version# = "1.90.0";
	output = remoteTar {
		url = "https://static.rust-lang.org/dist/rustc-"+version+"-src.tar.gz";
		compress = gzip;
		checksum = "kUjk5mOHRc7cTom0uJ5afFTkhFcXLYK8tJl_aqduffGSHc0TH_a-KKz6PI0nk_xK";
	};
	chmod = true;
}

package mrustc {
	description = "alternative rust compiler (re-implementation)";
	website = "https://github.com/thepowersgang/mrustc";
	anitya = 391250;

	version# = "0.12.0";
	source = remoteGitHub {
		suffix = "thepowersgang/mrustc";
		tag = "v"+version;
		checksum = "Db25OAKL_1yZIF6MlXOTHhrEJ-Pd-i-accVtt5rJollmpKm6B3bgS0xN7hoC1cVu";
	};
	patches = [
		"0001-do-not-download-rustc.patch",
		"0002-Revert-HIR-Typecheck-Optimise-by-doing-multiple-chec.patch",
	];
	extra = [ rustc-bootstrap-source ];
	minimal = true;

	enterSource = true;
	writable = true;
	chmod = true;

	exec = make {
		inPlace = true;
		skipConfigure = true;
		preMake = `
ln -sf gcc /system/bin/cc
ln -sf g++ /system/bin/c++

export PARLEVEL=`+jobsE+`
export RUSTC_SOURCE='../extra/rustc-bootstrap-source'
export RUSTC_VERSION="$(cut -d ' ' -f 1 "$RUSTC_SOURCE/version")"
export MRUSTC_TARGET_VER="$(cut -d '.' -f 1,2 <<< "$RUSTC_VERSION")"
export OUTDIR_SUF="-$RUSTC_VERSION"
patch -d "$RUSTC_SOURCE" -p0 < "rustc-$RUSTC_VERSION-src.patch"
touch "$RUSTC_SOURCE/dl-version"
ln -s "$RUSTC_SOURCE" "rustc-$RUSTC_VERSION-src"

sed -i 's/\$(shell git show --pretty=%H -s --no-show-signature)/unknown/' Makefile
sed -i 's/\$(shell git show -s --pretty=%h --no-show-signature)/unknown/' Makefile
sed -i 's/\$(shell git symbolic-ref -q --short HEAD || git describe --tags --exact-match)/v`+version+`/' Makefile
sed -i 's/\$(shell git diff-index --quiet HEAD; echo $$?)/0/' Makefile
sed -i 's/\$(shell env LC_TIME=C date -u +"%a, %e %b %Y %T +0000")/Thu,  1 Jan 1970 00:00:00 +0000/' Makefile
`;
		preCheck = `
make -f minicargo.mk LIBS
make local_tests
`;
		check = [ "test" ];

		install = `
LLVM="$(which llvm-config)"
OUTDIR="output-$RUSTC_VERSION"
make -f minicargo.mk LLVM_CONFIG="$LLVM" "$OUTDIR/rustc"
make -f minicargo.mk LLVM_CONFIG="$LLVM" "$OUTDIR/cargo"
make -C LLVM_CONFIG="$LLVM" run_rustc
`;
	};

	inputs = [
		bash,
		patch,
		llvm,

		// mrustc requires buggy gcc behaviour
		gcc,
	];
}