From 8e53442f0030e83d4e5cbe2fbbeba024765540ce Mon Sep 17 00:00:00 2001
From: dibe4octo <184112480+dibe4octo@users.noreply.github.com>
Date: Fri, 7 Mar 2025 17:45:00 +0100
Subject: [PATCH] chore(nix): create flake

---
 .envrc     |  1 +
 .gitignore |  3 +++
 flake.lock | 25 +++++++++++++++++++++++++
 flake.nix  | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 81 insertions(+)
 create mode 100644 .envrc
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index beac80e..94cb99c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,6 @@ out/
 .vscode/
 
 *.class
+
+### nix ###
+.direnv
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..1d0fc86
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1739736696,
+        "narHash": "sha256-zON2GNBkzsIyALlOCFiEBcIjI4w38GYOb+P+R4S8Jsw=",
+        "rev": "d74a2335ac9c133d6bbec9fc98d91a77f1604c1f",
+        "revCount": 754461,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.754461%2Brev-d74a2335ac9c133d6bbec9fc98d91a77f1604c1f/01951426-5a87-7b75-8413-1a0d9ec5ff04/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.%2A.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..92a45e1
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,52 @@
+{
+  description = "A Nix-flake-based Java development environment";
+
+  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+
+  outputs = { self, nixpkgs }:
+    let
+      javaVersion = 17; # Change this value to update the whole stack
+
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs { inherit system; overlays = [ self.overlays.default ]; };
+      });
+    in
+    {
+      overlays.default =
+        final: prev:
+        let
+          jdk = prev."jdk${toString javaVersion}";
+        in
+        {
+          inherit jdk;
+          maven = prev.maven.override { jdk_headless = jdk; };
+          gradle = prev.gradle.override { java = jdk; };
+          lombok = prev.lombok.override { inherit jdk; };
+        };
+
+      devShells = forEachSupportedSystem ({ pkgs }: {
+        default = pkgs.mkShell {
+          packages = with pkgs; [
+            gcc
+            gradle_7
+            jdk
+            maven
+            ncurses
+            patchelf
+            zlib
+            python314
+          ];
+
+          shellHook =
+            let
+              loadLombok = "-javaagent:${pkgs.lombok}/share/java/lombok.jar";
+              prev = "\${JAVA_TOOL_OPTIONS:+ $JAVA_TOOL_OPTIONS}";
+            in
+            ''
+              export JAVA_TOOL_OPTIONS="${loadLombok}${prev}"
+            '';
+        };
+      });
+    };
+}