fastddsgen: unpin gradle and openjdk

* gradle_7 is marked insecure (#452022) and up for removal (#358845)
* switch to openjdk21, the current LTS
* add a basic version package test

pkgs/by-name/fa/fastddsgen/493-addendum.patch

@@ -0,0 +1,17 @@
+    Fix gradle error
+    
+    https://docs.gradle.org/9.1.0/userguide/validation_problems.html#private_method_must_not_be_annotated
+
+diff --git a/build.gradle b/build.gradle
+index c6d537e..9029aae 100644
+--- a/build.gradle
++++ b/build.gradle
+@@ -69,7 +69,7 @@ public abstract class InstallPath extends DefaultTask {
+      * Install Task Action that copies the script and jar files
+      */
+     @TaskAction
+-    private void install() {
++    public void install() {
+         if (Os.isFamily(Os.FAMILY_WINDOWS)) {
+             final String install_path = (path != null && !path.isEmpty()) ? path : "C:\\Program Files\\fastddsgen\\";
+ 

pkgs/by-name/fa/fastddsgen/package.nix

@@ -3,36 +3,53 @@
   stdenv,
   makeWrapper,
   fetchFromGitHub,
-  gradle_7,
-  openjdk17,
+  fetchpatch2,
+  gradle,
+  openjdk,
+  testers,
 }:
 
-let
+stdenv.mkDerivation (finalAttrs: {
   pname = "fastddsgen";
   version = "4.2.0";
 
-  gradle = gradle_7;
-
-in
-stdenv.mkDerivation {
-  inherit pname version;
-
   src = fetchFromGitHub {
     owner = "eProsima";
     repo = "Fast-DDS-Gen";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     fetchSubmodules = true;
     hash = "sha256-weGS340MvPitWMgWx1cWTgYgGcQfJSTUus8EcBob7hY=";
   };
 
+  patches = [
+    # Note: PR is not yet merged
+    # Select commit from https://github.com/eProsima/IDL-Parser/pull/179
+    (fetchpatch2 {
+      url = "https://github.com/eProsima/IDL-Parser/commit/801ed2f671322c0134b8db180529c9a400d5ed2b.patch";
+      stripLen = 1;
+      extraPrefix = "thirdparty/idl-parser/";
+      includes = [ "thirdparty/idl-parser/build.gradle" ];
+      hash = "sha256-OzywQ02yaMnya+536DeHWeKwZefI4meYqmZcp3onwR8=";
+    })
+
+    # Note: PR is not yet merged
+    # Select commit from https://github.com/eProsima/Fast-DDS-Gen/pull/493
+    (fetchpatch2 {
+      url = "https://github.com/eProsima/Fast-DDS-Gen/commit/b1b66d587f38d4fd6227aa1969c3a10c2095ae7d.patch";
+      hash = "sha256-qVp9Xk8og8Ga2BMiqt2BFM0lAtDnmmwzteceievfcXE=";
+    })
+
+    ./493-addendum.patch
+  ];
+
   nativeBuildInputs = [
     gradle
-    openjdk17
+    openjdk
     makeWrapper
   ];
 
   mitmCache = gradle.fetchDeps {
-    inherit pname;
+    inherit (finalAttrs) pname;
     data = ./deps.json;
   };
 
@@ -51,7 +68,7 @@ stdenv.mkDerivation {
     # Override the default start script to use absolute java path.
     # Make the unwrapped "cpp" available in the path, since the wrapped "cpp"
     # passes additional flags and produces output incompatible with fastddsgen.
-    makeWrapper ${openjdk17}/bin/java $out/bin/fastddsgen \
+    makeWrapper ${openjdk}/bin/java $out/bin/fastddsgen \
       --add-flags "-jar $out/share/fastddsgen/java/fastddsgen.jar" \
       --prefix PATH : ${lib.makeBinPath [ stdenv.cc.cc ]}
 
@@ -65,6 +82,11 @@ stdenv.mkDerivation {
     gradle nixDownloadDeps
   '';
 
+  passthru.tests = testers.testVersion {
+    command = "${finalAttrs.meta.mainProgram} -version";
+    package = finalAttrs.finalPackage;
+  };
+
   meta = with lib; {
     description = "Fast-DDS IDL code generator tool";
     mainProgram = "fastddsgen";
@@ -79,6 +101,6 @@ stdenv.mkDerivation {
       used to publish or subscribe.
     '';
     maintainers = with maintainers; [ wentasah ];
-    platforms = openjdk17.meta.platforms;
+    platforms = openjdk.meta.platforms;
   };
-}
+})