nixpkgs/pkgs/development/tools/build-managers/bazel/cpp-test.nix

{
  bazel
, bazelTest
, bazel-examples
, gccStdenv
, lib
, runLocal
, runtimeShell
, writeScript
, writeText
, distDir
}:

let

  toolsBazel = writeScript "bazel" ''
    #! ${runtimeShell}

    export CXX='${gccStdenv.cc}/bin/g++'
    export LD='${gccStdenv.cc}/bin/ld'
    export CC='${gccStdenv.cc}/bin/gcc'

    # XXX: hack for macosX, this flags disable bazel usage of xcode
    # See: https://github.com/bazelbuild/bazel/issues/4231
    export BAZEL_USE_CPP_ONLY_TOOLCHAIN=1

    exec "$BAZEL_REAL" "$@"
  '';

  workspaceDir = runLocal "our_workspace" {} (''
    cp -r ${bazel-examples}/cpp-tutorial/stage3 $out
    find $out -type d -exec chmod 755 {} \;
  ''
  + (lib.optionalString gccStdenv.isDarwin ''
    mkdir $out/tools
    cp ${toolsBazel} $out/tools/bazel
  ''));

  testBazel = bazelTest {
    name = "bazel-test-cpp";
    inherit workspaceDir;
    bazelPkg = bazel;
    bazelScript = ''
      ${bazel}/bin/bazel \
        build --verbose_failures \
        --distdir=${distDir} \
          //...
    '';
  };

in testBazel