depot/third_party/nixpkgs/pkgs/development/compilers/zig/generic.nix

{ lib
, stdenv
, fetchFromGitHub
, cmake
, llvmPackages
, libxml2
, zlib
, coreutils
, callPackage
, ...
}:

args:

stdenv.mkDerivation (finalAttrs: {
  pname = "zig";

  src = fetchFromGitHub {
    owner = "ziglang";
    repo = "zig";
    rev = finalAttrs.version;
    inherit (args) hash;
  };

  nativeBuildInputs = [
    cmake
    llvmPackages.llvm.dev
  ];

  buildInputs = [
    libxml2
    zlib
  ] ++ (with llvmPackages; [
    libclang
    lld
    llvm
  ]);

  # On Darwin, Zig calls std.zig.system.darwin.macos.detect during the build,
  # which parses /System/Library/CoreServices/SystemVersion.plist and
  # /System/Library/CoreServices/.SystemVersionPlatform.plist to determine the
  # OS version. This causes the build to fail during stage 3 with
  # OSVersionDetectionFail when the sandbox is enabled.
  __impureHostDeps = lib.optionals stdenv.hostPlatform.isDarwin [
    "/System/Library/CoreServices/.SystemVersionPlatform.plist"
    "/System/Library/CoreServices/SystemVersion.plist"
  ];

  env.ZIG_GLOBAL_CACHE_DIR = "$TMPDIR/zig-cache";

  # Zig's build looks at /usr/bin/env to find dynamic linking info. This doesn't
  # work in Nix's sandbox. Use env from our coreutils instead.
  postPatch = if lib.versionAtLeast args.version "0.12" then ''
    substituteInPlace lib/std/zig/system.zig \
      --replace "/usr/bin/env" "${coreutils}/bin/env"
  '' else ''
    substituteInPlace lib/std/zig/system/NativeTargetInfo.zig \
      --replace "/usr/bin/env" "${coreutils}/bin/env"
  '';

  doInstallCheck = true;
  installCheckPhase = ''
    runHook preInstallCheck

    $out/bin/zig test --cache-dir "$TMPDIR/zig-test-cache" -I $src/test $src/test/behavior.zig

    runHook postInstallCheck
  '';

  passthru = {
    hook = callPackage ./hook.nix {
      zig = finalAttrs.finalPackage;
    };
    cc = callPackage ./cc.nix {
      zig = finalAttrs.finalPackage;
    };
    stdenv = callPackage ./stdenv.nix {
      zig = finalAttrs.finalPackage;
    };
  };

  meta = {
    description = "General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software";
    homepage = "https://ziglang.org/";
    changelog = "https://ziglang.org/download/${finalAttrs.version}/release-notes.html";
    license = lib.licenses.mit;
    maintainers = with lib.maintainers; [ andrewrk ] ++ lib.teams.zig.members;
    mainProgram = "zig";
    platforms = lib.platforms.unix;
  };
} // removeAttrs args [ "hash" ])