Migrate Nix shell config to Flake

.envrc

@@ -1 +1 @@
-use nix
+use flake

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1701952659,
+        "narHash": "sha256-TJv2srXt6fYPUjxgLAL0cy4nuf1OZD4KuA1TrCiQqg0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b4372c4924d9182034066c823df76d6eaf1f4ec4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,42 @@
+{
+  description = "BASE engine";
+
+  inputs = {
+    nixpkgs.url = github:NixOS/nixpkgs/nixos-23.11;
+  };
+
+  outputs = { self, nixpkgs }:
+  let
+    pkgs = import nixpkgs { inherit system; };
+    system = "x86_64-linux";
+    opengl = "/run/opengl-driver";
+  in {
+    devShells.${system}.default = with pkgs; mkShell {
+      name = "base-editor";
+
+      buildInputs = [
+        xorg.libXtst
+        alsa-lib
+        gradle_7
+        jdk17
+        protobuf
+      ];
+
+      shellHook = ''
+        echo
+        echo
+        echo "======================================================================================================"
+        echo "Welcome to BASE NixOS flake shell environment"
+        echo "Remember to provide following LD environment variable in order to run application outside this shell:"
+        echo
+        echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
+        echo "======================================================================================================"
+        echo
+        echo
+      '';
+
+      LD_LIBRARY_PATH = "${opengl}/lib:${xorg.libXtst}/lib:${alsa-lib}/lib";
+      PROTOBUF_EXECUTABLE = "${protobuf}/bin/protoc";
+    };
+  };
+}

gradle.properties

@@ -11,10 +11,10 @@ javaFxPluginVersion=0.0.10
 tornadoFxVersion=2.0.0-SNAPSHOT
 ikonliVersion=12.2.0
 protobufPluginVersion=0.8.18
-protobufVersion=3.19.1
+protobufVersion=3.24.4
 richtextfxVersion=0.10.7
 janinoVersion=3.1.6
 apacheCommonsVersion=3.6.1
 h2Version=1.4.200
 hikariVersion=5.0.0
-javaPoetVersion=1.13.0
+javaPoetVersion=1.13.0

proto/build.gradle

@@ -29,7 +29,13 @@ sourceSets {
 protobuf {
     // Fetch protoc compiler
     protoc {
-        artifact = "com.google.protobuf:protoc:$protobufVersion"
+        def protobufExecutable = System.getenv("PROTOBUF_EXECUTABLE")
+
+        if (protobufExecutable == null) {
+            artifact = "com.google.protobuf:protoc:$protobufVersion"
+        } else {
+            path = protobufExecutable
+        }
     }
 
     generatedFilesBaseDir = "$projectDir/build/proto/"
@@ -42,4 +48,4 @@ protobuf {
             }
         }
     }
-}
+}

shell.nix

@@ -1,43 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-# Because of high dependency on native libraries like OpenGL and OpenAL
-# on the NixOS the BASE engine requires few modifications.
-# Basically this shell.nix could be enough, however the OpenGL is highly tied with the hardware,
-# so the following change needs to be applied in the configuration.nix (or your flake configuration, whatever):
-#  hardware.opengl = {
-#    enable = true;
-#    extraPackages = with pkgs; [
-#      libGL
-#    ];
-#    setLdLibraryPath = true;
-#  };
-#
-# Also for GNOME environments, the Editor requires the libglassgtk3.so library,
-# so it is available via xorg.libXtst package mentioned already in the shell definition below.
-
-let
-  opengl = "/run/opengl-driver";
-in pkgs.mkShell {
-  name = "BASE NixOS runtime";
-
-  buildInputs = [
-    pkgs.xorg.libXtst  # Required by editor on GNOME environments (due to libglassgtk3.so dependency)
-    pkgs.alsa-lib      # Either alsa or jack or pulseaudio library is required by game engine via OpenAL native library
-  ];
-
-  # OpenGL needs to be configured via /etc/nixos/configuration.nix
-  LD_LIBRARY_PATH = "${opengl}/lib:${pkgs.xorg.libXtst}/lib:${pkgs.alsa-lib}/lib";
-
-  shellHook = ''
-    echo
-    echo
-    echo "======================================================================================================"
-    echo "Welcome to BASE NixOS shell environment"
-    echo "Remember to provide following LD environment variable in order to run application outside this shell:"
-    echo
-    echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
-    echo "======================================================================================================"
-    echo
-    echo
-  '';
-}