init repo

flake.nix

@@ -0,0 +1,33 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+  outputs = {
+    nixpkgs,
+    flake-utils,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (
+      system: let
+        pkgs = import nixpkgs {
+          inherit system;
+          config = {
+            supportCuda = true;
+          };
+        };
+      in {
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            jdk
+            gradle
+            kotlin-language-server
+            ktfmt
+            jdt-language-server
+
+            graph-easy
+            graphviz
+          ];
+        };
+      }
+    );
+}