feat: add shell-intellij-gradle-openjdk.nix

modules/jetbrains-ide.nix

@@ -29,12 +29,13 @@ in
     #   /run/current-system/sw/bin/python3
     # This makes it easier to configure it as interpreter in Jetbrain's IDE.
     python3
-    # Gradle build tool
-    gradle
-    # LTS OpenJDK
+
+    # To use Gradle within InelliJ (or to use a specific OpenJDK version with Gradle), see
+    # shell-intellij-grade-openjd.nix
+
+    # If a more recent OpenJDK version than the bundled JDK is needed
     #unstable.jdk
-    # Latest OpenJDK
-    unstable.jdk23
+    #unstable.jdk23
 
     # Markdown preview
     #pandoc

shell-intellij-gradle-openjdk.nix

@@ -0,0 +1,35 @@
+# Example from my (non public) Software Quality course homework.
+# That (private) repo might contain a more up to date version.
+
+{
+  pkgs ? import <nixpkgs> {
+     # https://github.com/NixOS/nixpkgs/issues/166220#issuecomment-1745803058
+     config.allowUnfree = true;
+  }
+}:
+
+let
+  unstable = import (fetchTarball https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz) { };
+
+  # https://github.com/NixOS/nixpkgs/blob/4b218e54ae22c8b3ad642ff0dec842363c3abd0f/pkgs/top-level/all-packages.nix#L14583-L14588
+  jdk = unstable.jdk23.override {
+    enableJavaFX = true;
+    openjfx_jdk = unstable.openjfx23.override { withWebKit = true; };
+  };
+
+  # https://github.com/NixOS/nixpkgs/blob/23e89b7da85c3640bbc2173fe04f4bd114342367/pkgs/development/tools/build-managers/gradle/default.nix#L46
+  gradle = unstable.gradle.override { java = jdk; };
+in
+
+(
+  # Gradle's toolchain support does not work with IntelliJ, thus we have to use buildFHSUserEnv
+  pkgs.buildFHSUserEnv
+  {
+    name = "intellij-gradle-jdk23";
+    targetPkgs = pkgs_: [
+      pkgs_.jetbrains.idea-ultimate
+      jdk
+      gradle
+    ];
+  }
+).env