nixpkgs/pkgs/build-support/rust/default.nix

{ callPackage, fetchurl, stdenv, path, cacert, git, rust }:
let
  cargoVendor = callPackage ./cargo-vendor {};

  fetchcargo = import ./fetchcargo.nix {
    inherit stdenv cacert git rust cargoVendor;
  };
in
{ name, cargoSha256
, src ? null
, srcs ? null
, sourceRoot ? null
, logLevel ? ""
, buildInputs ? []
, cargoUpdateHook ? ""
, cargoDepsHook ? ""
, cargoBuildFlags ? []
, ... } @ args:

let
  lib = stdenv.lib;

  cargoDeps = fetchcargo {
    inherit name src srcs sourceRoot cargoUpdateHook;
    sha256 = cargoSha256;
  };

in stdenv.mkDerivation (args // {
  inherit cargoDeps;

  patchRegistryDeps = ./patch-registry-deps;

  buildInputs = [ cacert git rust.cargo rust.rustc ] ++ buildInputs;

  configurePhase = args.configurePhase or ''
    runHook preConfigure
    # noop
    runHook postConfigure
  '';

  postUnpack = ''
    eval "$cargoDepsHook"

    unpackFile "$cargoDeps"
    cargoDepsCopy=$(stripHash $(basename $cargoDeps))
    chmod -R +w "$cargoDepsCopy"

    mkdir .cargo
    cat >.cargo/config <<-EOF
      [source.crates-io]
      registry = 'https://github.com/rust-lang/crates.io-index'
      replace-with = 'vendored-sources'

      [source.vendored-sources]
      directory = '$(pwd)/$cargoDepsCopy'
    EOF

    unset cargoDepsCopy

    export RUST_LOG=${logLevel}
  '' + (args.postUnpack or "");

  buildPhase = with builtins; args.buildPhase or ''
    runHook preBuild
    echo "Running cargo build --release ${concatStringsSep " " cargoBuildFlags}"
    cargo build --release --frozen ${concatStringsSep " " cargoBuildFlags}
    runHook postBuild
  '';

  checkPhase = args.checkPhase or ''
    runHook preCheck
    echo "Running cargo test"
    cargo test
    runHook postCheck
  '';

  doCheck = args.doCheck or true;

  installPhase = args.installPhase or ''
    runHook preInstall
    mkdir -p $out/bin
    find target/release -maxdepth 1 -executable -exec cp "{}" $out/bin \;
    runHook postInstall
  '';

  passthru = { inherit cargoDeps; } // (args.passthru or {});
})