nixpkgs/pkgs/development/tools/build-managers/gradle/default.nix

{ stdenv, fetchurl, unzip, jdk, makeWrapper }:

rec {
  gradleGen = {name, src} : stdenv.mkDerivation rec {
    inherit name src;

    installPhase = ''
      mkdir -pv $out/lib/gradle/
      cp -rv lib/ $out/lib/gradle/

      gradle_launcher_jar=$(echo $out/lib/gradle/lib/gradle-launcher-*.jar)
      test -f $gradle_launcher_jar
      makeWrapper ${jdk}/bin/java $out/bin/gradle \
        --set JAVA_HOME ${jdk} \
        --add-flags "-classpath $gradle_launcher_jar org.gradle.launcher.GradleMain"
    '';

    phases = "unpackPhase installPhase";

    buildInputs = [ unzip jdk makeWrapper ];

    meta = {
      description = "Enterprise-grade build system";
      longDescription = ''
        Gradle is a build system which offers you ease, power and freedom.
        You can choose the balance for yourself. It has powerful multi-project
        build support. It has a layer on top of Ivy that provides a
        build-by-convention integration for Ivy. It gives you always the choice
        between the flexibility of Ant and the convenience of a
        build-by-convention behavior.
      '';
      homepage = http://www.gradle.org/;
      license = stdenv.lib.licenses.asl20;
    };
  };

  gradle28 = gradleGen rec {
    name = "gradle-2.8";

    src = fetchurl {
      url = "http://services.gradle.org/distributions/${name}-bin.zip";
      sha256 = "1jq3m6ihvcxyp37mwsg3i8li9hd6rpv8ri8ih2mgvph4y71bk3d8";
    };
  };

  gradle25 = gradleGen rec {
    name = "gradle-2.5";

    src = fetchurl {
      url = "http://services.gradle.org/distributions/${name}-bin.zip";
      sha256 = "0mc5lf6phkncx77r0papzmfvyiqm0y26x50ipvmzkcsbn463x59z";
    };
  };
}