{ hydraSrc ? { outPath = ./.; revCount = 1234; rev = "abcdef"; }
, officialRelease ? false
, shell ? false
}:

with import <nixpkgs/lib>;

let

  pkgs = import <nixpkgs> {};

  genAttrs' = genAttrs [ "x86_64-linux" /* "i686-linux" */ ];

  hydraServer = hydraPkg:
    { config, pkgs, ... }:
    { imports = [ ./hydra-module.nix ];

      virtualisation.memorySize = 1024;
      virtualisation.writableStore = true;

      services.hydra-dev.enable = true;
      services.hydra-dev.package = hydraPkg;
      services.hydra-dev.hydraURL = "http://hydra.example.org";
      services.hydra-dev.notificationSender = "admin@hydra.example.org";

      services.postgresql.enable = true;
      services.postgresql.package = pkgs.postgresql92;

      environment.systemPackages = [ pkgs.perlPackages.LWP pkgs.perlPackages.JSON ];
    };

in

rec {

  build = genAttrs' (system:

    with import <nixpkgs> { inherit system; };

    let

      aws-sdk-cpp' =
        aws-sdk-cpp.override {
          apis = ["s3"];
          customMemoryManagement = false;
        };

      stdenv6 = overrideCC stdenv gcc6;
    in

    callPackage ./. {
      stdenv = stdenv6 // { mkDerivation = args: releaseTools.nixBuild (args // {
        stdenv = stdenv6;
        postUnpack = optionalString (!shell) ''
          # Clean up when building from a working tree.
          (cd $sourceRoot && (git ls-files -o --directory | xargs -r rm -rfv)) || true
        '';
      }); };
      inherit (gitAndTools) topGit;
      nix = nixUnstable;
      aws-sdk-cpp = aws-sdk-cpp';
      hydraSrc = if shell then null else hydraSrc;
    });

  manual = pkgs.runCommand "hydra-manual-${build.x86_64-linux.version}"
    { build = build.x86_64-linux;
    }
    ''
      mkdir -p $out/share
      cp -prvd $build/share/doc $out/share/

      mkdir $out/nix-support
      echo "doc manual $out/share/doc/hydra" >> $out/nix-support/hydra-build-products
    '';

  tests.install = genAttrs' (system:
    with import <nixpkgs/nixos/lib/testing.nix> { inherit system; };
    simpleTest {
      machine = hydraServer build.${system};
      testScript =
        ''
          $machine->waitForJob("hydra-init");
          $machine->waitForJob("hydra-server");
          $machine->waitForJob("hydra-evaluator");
          $machine->waitForJob("hydra-queue-runner");
          $machine->waitForOpenPort("3000");
          $machine->succeed("curl --fail http://localhost:3000/");
        '';
    });

  tests.api = genAttrs' (system:
    with import <nixpkgs/nixos/lib/testing.nix> { inherit system; };
    simpleTest {
      machine = hydraServer build.${system};
      testScript =
        let dbi = "dbi:Pg:dbname=hydra;user=root;"; in
        ''
          $machine->waitForJob("hydra-init");

          # Create an admin account and some other state.
          $machine->succeed
              ( "su - hydra -c \"hydra-create-user root --email-address 'alice\@example.org' --password foobar --role admin\""
              , "mkdir /run/jobset /tmp/nix"
              , "chmod 755 /run/jobset /tmp/nix"
              , "cp ${./tests/api-test.nix} /run/jobset/default.nix"
              , "chmod 644 /run/jobset/default.nix"
              , "chown -R hydra /run/jobset /tmp/nix"
              );

          $machine->succeed("systemctl stop hydra-evaluator hydra-queue-runner");
          $machine->waitForJob("hydra-server");
          $machine->waitForOpenPort("3000");

          # Run the API tests.
          $machine->mustSucceed("su - hydra -c 'perl ${./tests/api-test.pl}' >&2");
        '';
  });

  /*
  tests.s3backup = genAttrs' (system:
    with import <nixpkgs/nixos/lib/testing.nix> { inherit system; };
    let hydra = build.${system}
    simpleTest {
      machine =
        { config, pkgs, ... }:
        { services.postgresql.enable = true;
          services.postgresql.package = pkgs.postgresql92;
          environment.systemPackages = [ hydra pkgs.rubyLibs.fakes3 ];
          virtualisation.memorySize = 2047;
          boot.kernelPackages = pkgs.linuxPackages_3_10;
          virtualisation.writableStore = true;
          networking.extraHosts = ''
            127.0.0.1 hydra.s3.amazonaws.com
          '';
        };

      testScript =
        ''
          $machine->waitForJob("postgresql");

          # Initialise the database and the state.
          $machine->succeed
              ( "createdb -O root hydra"
              , "psql hydra -f ${hydra}/libexec/hydra/sql/hydra-postgresql.sql"
              , "mkdir /var/lib/hydra"
              , "mkdir /tmp/jobs"
              , "cp ${./tests/s3-backup-test.pl} /tmp/s3-backup-test.pl"
              , "cp ${./tests/api-test.nix} /tmp/jobs/default.nix"
              );

          # start fakes3
          $machine->succeed("fakes3 --root /tmp/s3 --port 80 &>/dev/null &");
          $machine->waitForOpenPort("80");

          $machine->succeed("cd /tmp && LOGNAME=root AWS_ACCESS_KEY_ID=foo AWS_SECRET_ACCESS_KEY=bar HYDRA_DBI='dbi:Pg:dbname=hydra;user=root;' HYDRA_CONFIG=${./tests/s3-backup-test.config} perl -I ${hydra}/libexec/hydra/lib -I ${hydra.perlDeps}/lib/perl5/site_perl ./s3-backup-test.pl >&2");
        '';
  });
  */
}