package mrustc-source {
	description = "patched mrustc source tree";
	exclude = true;

	version# = "0.12.0";
	output = remoteGitHub {
		suffix = "thepowersgang/mrustc";
		tag = "v"+version;
		checksum = "Db25OAKL_1yZIF6MlXOTHhrEJ-Pd-i-accVtt5rJollmpKm6B3bgS0xN7hoC1cVu";
	};
	chmod = true;
	patches = [
		"0001-do-not-download-rustc.patch",
		"0002-Revert-HIR-Typecheck-Optimise-by-doing-multiple-chec.patch",
		"0003-rustc-src-enable-rustix-use-libc-feature-revert-port.patch",

		"remove-git-invocations.patch",
	];
}

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

	source = mrustc-source;
	enterSource = true;
	writable = true;

	minimal = true;
	exec = make {
		inPlace = true;
		skipConfigure = true;
		make = [ "CXX='g++ -w'" ];
		// test suite runs during rustc-bootstrap
		skipCheck = true;
		install = "install -vD bin/mrustc /work/system/bin/mrustc";
	};

	inputs = [
		bash,

		// mrustc requires buggy gcc behaviour
		gcc,
	];

	runtime = [ gcc ];
}

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 rustc-bootstrap {
	description = "rust toolchain bootstrapped via mrustc";
	exclude = true;

	source = mrustc-source;
	extra = [ rustc-bootstrap-source ];

	enterSource = true;
	writable = true;

	exec = make {
		inPlace = true;
		skipConfigure = true;
		preMake = `
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"
mkdir bin && ln -s /system/bin/mrustc bin/
`;
		make = [
			"-f",
			"minicargo.mk",
			"CC=gcc",
			"CXX='g++ -w'",
			"LIBS",
		];
		check = [
			"CC=gcc",
			"CXX='g++ -w'",
			"test",
			"local_tests",
		];

		install = `
export CC=gcc CXX=g++
OUTDIR="output-$RUSTC_VERSION"
make -f minicargo.mk "$OUTDIR/rustc"
make -f minicargo.mk "$OUTDIR/cargo"
make -C run_rustc
`;
	};

	inputs = [
		bash,
		patch,
		cmake,
		pkg-config,
		perl,
		python,
		mrustc,

		kernel-headers,
	];
}