121 lines
4.4 KiB
Nix
121 lines
4.4 KiB
Nix
{ fetchurl, lib, stdenv, zstd
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, testers, buck2 # for passthru.tests
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}:
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# NOTE (aseipp): buck2 uses a precompiled binary build for good reason — the
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# upstream codebase extensively uses unstable `rustc` nightly features, and as a
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# result can't be built upstream in any sane manner. it is only ever tested and
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# integrated against a single version of the compiler, which produces all usable
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# binaries. you shouldn't try to workaround this or get clever and think you can
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# patch it to work; just accept it for now. it is extremely unlikely buck2 will
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# build with a stable compiler anytime soon; see related upstream issues:
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#
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# - NixOS/nixpkgs#226677
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# - NixOS/nixpkgs#232471
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# - facebook/buck2#265
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# - facebook/buck2#322
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#
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# worth noting: it *is* possible to build buck2 from source using
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# buildRustPackage, and it works fine, but only if you are using flakes and can
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# import `rust-overlay` from somewhere else to vendor your compiler. See
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# nixos/nixpkgs#226677 for more information about that.
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# NOTE (aseipp): this expression is mostly automated, and you are STRONGLY
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# RECOMMENDED to use to nix-update for updating this expression when new
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# releases come out, which runs the sibling `update.sh` script.
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#
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# from the root of the nixpkgs git repository, run:
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#
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# nix-shell maintainers/scripts/update.nix \
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# --argstr commit true \
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# --argstr package buck2
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let
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# build hashes, which correspond to the hashes of the precompiled binaries
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# procued by GitHub Actions. this also includes the hash for a download of a
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# compatible buck2-prelude
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buildHashes = builtins.fromJSON (builtins.readFile ./hashes.json);
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# our version of buck2; this should be a git tag
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version = "2024-01-15";
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# the platform-specific, statically linked binary — which is also
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# zstd-compressed
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src =
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let
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suffix = {
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# map our platform name to the rust toolchain suffix
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# NOTE (aseipp): must be synchronized with update.sh!
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x86_64-darwin = "x86_64-apple-darwin";
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aarch64-darwin = "aarch64-apple-darwin";
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x86_64-linux = "x86_64-unknown-linux-musl";
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aarch64-linux = "aarch64-unknown-linux-musl";
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}."${stdenv.hostPlatform.system}" or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
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name = "buck2-${version}-${suffix}.zst";
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hash = buildHashes."${stdenv.hostPlatform.system}";
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url = "https://github.com/facebook/buck2/releases/download/${version}/buck2-${suffix}.zst";
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in fetchurl { inherit name url hash; };
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# compatible version of buck2 prelude; this is exported via passthru.prelude
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# for downstream consumers to use when they need to automate any kind of
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# tooling
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prelude-src =
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let
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prelude-hash = "ccf6f5d1693cfa215b60212cf9863d27c6fd6a69";
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name = "buck2-prelude-${version}.tar.gz";
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hash = buildHashes."_prelude";
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url = "https://github.com/facebook/buck2-prelude/archive/${prelude-hash}.tar.gz";
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in fetchurl { inherit name url hash; };
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in stdenv.mkDerivation {
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pname = "buck2";
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version = "unstable-${version}"; # TODO (aseipp): kill 'unstable' once a non-prerelease is made
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inherit src;
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nativeBuildInputs = [ zstd ];
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doCheck = true;
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dontConfigure = true;
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dontStrip = true;
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unpackPhase = "unzstd ${src} -o ./buck2";
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buildPhase = "chmod +x ./buck2";
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checkPhase = "./buck2 --version";
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installPhase = ''
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mkdir -p $out/bin
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install -D buck2 $out/bin/buck2
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'';
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passthru = {
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prelude = prelude-src;
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updateScript = ./update.sh;
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tests = testers.testVersion {
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package = buck2;
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# NOTE (aseipp): the buck2 --version command doesn't actually print out
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# the given version tagged in the release, but a hash, but not the git
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# hash; the entire version logic is bizarrely specific to buck2, and needs
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# to be reworked the open source build to behave like expected. in the
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# mean time, it *does* always print out 'buck2 <hash>...' so we can just
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# match on "buck2"
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version = "buck2";
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};
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};
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meta = with lib; {
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description = "Fast, hermetic, multi-language build system";
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homepage = "https://buck2.build";
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changelog = "https://github.com/facebook/buck2/releases/tag/${version}";
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license = with licenses; [ asl20 /* or */ mit ];
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mainProgram = "buck2";
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maintainers = with maintainers; [ thoughtpolice ];
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platforms = [
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"x86_64-linux" "aarch64-linux"
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"x86_64-darwin" "aarch64-darwin"
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];
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};
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}
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