nix/src/nix-expr-tests/package.nix

{ lib
, stdenv
, releaseTools

, meson
, ninja
, pkg-config

, nix-expr
, nix-expr-c
, nix-expr-test-support

, rapidcheck
, gtest
, runCommand

# Configuration Options

, versionSuffix ? ""

# Check test coverage of Nix. Probably want to use with at least
# one of `doCheck` or `doInstallCheck` enabled.
, withCoverageChecks ? false
}:

let
  inherit (lib) fileset;

  version = lib.fileContents ./.version + versionSuffix;

  mkDerivation =
    if withCoverageChecks
    then
      # TODO support `finalAttrs` args function in
      # `releaseTools.coverageAnalysis`.
      argsFun:
         releaseTools.coverageAnalysis (let args = argsFun args; in args)
    else stdenv.mkDerivation;
in

mkDerivation (finalAttrs: {
  pname = "nix-expr-tests";
  inherit version;

  src = fileset.toSource {
    root = ./.;
    fileset = fileset.unions [
      ./meson.build
      # ./meson.options
      (fileset.fileFilter (file: file.hasExt "cc") ./.)
      (fileset.fileFilter (file: file.hasExt "hh") ./.)
    ];
  };

  outputs = [ "out" "dev" ];

  nativeBuildInputs = [
    meson
    ninja
    pkg-config
  ];

  buildInputs = [
    nix-expr
    nix-expr-c
    nix-expr-test-support
    rapidcheck
    gtest
  ];

  preConfigure =
    # "Inline" .version so it's not a symlink, and includes the suffix.
    # Do the meson utils, without modification.
    ''
      echo ${version} > .version
      cp -r ${../../build-utils-meson} build-utils-meson
    '';

  mesonFlags = [
  ];

  env = lib.optionalAttrs (stdenv.isLinux && !(stdenv.hostPlatform.isStatic && stdenv.system == "aarch64-linux")) {
    LDFLAGS = "-fuse-ld=gold";
  };

  enableParallelBuilding = true;

  separateDebugInfo = !stdenv.hostPlatform.isStatic;

  # TODO Always true after https://github.com/NixOS/nixpkgs/issues/318564
  strictDeps = !withCoverageChecks;

  hardeningDisable = lib.optional stdenv.hostPlatform.isStatic "pie";

  passthru = {
    tests = {
      run = runCommand "${finalAttrs.pname}-run" {
      } ''
        PATH="${lib.makeBinPath [ finalAttrs.finalPackage ]}:$PATH"
        export _NIX_TEST_UNIT_DATA=${./data}
        nix-expr-tests
        touch $out
      '';
    };
  };

  meta = {
    platforms = lib.platforms.unix ++ lib.platforms.windows;
  };

} // lib.optionalAttrs withCoverageChecks {
  lcovFilter = [ "*/boost/*" "*-tab.*" ];

  hardeningDisable = [ "fortify" ];
})