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|
{ fetchurl, lib, stdenv, zstd
, testers, buck2 # for passthru.tests
}:
# NOTE (aseipp): buck2 uses a precompiled binary build for good reason — the
# upstream codebase extensively uses unstable `rustc` nightly features, and as a
# result can't be built upstream in any sane manner. it is only ever tested and
# integrated against a single version of the compiler, which produces all usable
# binaries. you shouldn't try to workaround this or get clever and think you can
# patch it to work; just accept it for now. it is extremely unlikely buck2 will
# build with a stable compiler anytime soon; see related upstream issues:
#
# - NixOS/nixpkgs#226677
# - NixOS/nixpkgs#232471
# - facebook/buck2#265
# - facebook/buck2#322
#
# worth noting: it *is* possible to build buck2 from source using
# buildRustPackage, and it works fine, but only if you are using flakes and can
# import `rust-overlay` from somewhere else to vendor your compiler. See
# nixos/nixpkgs#226677 for more information about that.
# NOTE (aseipp): this expression is mostly automated, and you are STRONGLY
# RECOMMENDED to use to nix-update for updating this expression when new
# releases come out, which runs the sibling `update.sh` script.
#
# from the root of the nixpkgs git repository, run:
#
# nix-shell maintainers/scripts/update.nix \
# --argstr commit true \
# --argstr package buck2
let
# build hashes, which correspond to the hashes of the precompiled binaries
# procued by GitHub Actions. this also includes the hash for a download of a
# compatible buck2-prelude
buildHashes = builtins.fromJSON (builtins.readFile ./hashes.json);
# our version of buck2; this should be a git tag
version = "2023-09-15";
# the platform-specific, statically linked binary — which is also
# zstd-compressed
src =
let
suffix = {
# map our platform name to the rust toolchain suffix
# NOTE (aseipp): must be synchronized with update.sh!
x86_64-darwin = "x86_64-apple-darwin";
aarch64-darwin = "aarch64-apple-darwin";
x86_64-linux = "x86_64-unknown-linux-musl";
aarch64-linux = "aarch64-unknown-linux-musl";
}."${stdenv.hostPlatform.system}" or (throw "Unsupported system: ${stdenv.hostPlatform.system}");
name = "buck2-${version}-${suffix}.zst";
hash = buildHashes."${stdenv.hostPlatform.system}";
url = "https://github.com/facebook/buck2/releases/download/${version}/buck2-${suffix}.zst";
in fetchurl { inherit name url hash; };
# compatible version of buck2 prelude; this is exported via passthru.prelude
# for downstream consumers to use when they need to automate any kind of
# tooling
prelude-src =
let
prelude-hash = "1cdbe261a4e669d9bb25bac5617b17919b2bb05c";
name = "buck2-prelude-${version}.tar.gz";
hash = buildHashes."_prelude";
url = "https://github.com/facebook/buck2-prelude/archive/${prelude-hash}.tar.gz";
in fetchurl { inherit name url hash; };
in stdenv.mkDerivation {
pname = "buck2";
version = "unstable-${version}"; # TODO (aseipp): kill 'unstable' once a non-prerelease is made
inherit src;
nativeBuildInputs = [ zstd ];
doCheck = true;
dontConfigure = true;
dontStrip = true;
unpackPhase = "unzstd ${src} -o ./buck2";
buildPhase = "chmod +x ./buck2";
checkPhase = "./buck2 --version";
installPhase = ''
mkdir -p $out/bin
install -D buck2 $out/bin/buck2
'';
passthru = {
prelude = prelude-src;
updateScript = ./update.sh;
tests = testers.testVersion {
package = buck2;
# NOTE (aseipp): the buck2 --version command doesn't actually print out
# the given version tagged in the release, but a hash, but not the git
# hash; the entire version logic is bizarrely specific to buck2, and needs
# to be reworked the open source build to behave like expected. in the
# mean time, it *does* always print out 'buck2 <hash>...' so we can just
# match on "buck2"
version = "buck2";
};
};
meta = with lib; {
description = "Fast, hermetic, multi-language build system";
homepage = "https://buck2.build";
changelog = "https://github.com/facebook/buck2/releases/tag/${version}";
license = with licenses; [ asl20 /* or */ mit ];
mainProgram = "buck2";
maintainers = with maintainers; [ thoughtpolice ];
platforms = [
"x86_64-linux" "aarch64-linux"
"x86_64-darwin" "aarch64-darwin"
];
};
}
|