Add Nix flake

Author: deepy

.envrc

@@ -0,0 +1 @@
+use flake --impure

.gitignore

@@ -14,4 +14,5 @@ node_modules
 .settings
 bin
 examples/**/*.lock
-*.hprof
+*.hprof
+.direnv/

flake.lock

@@ -0,0 +1,33 @@
+{
+  description = "A Nix-flake-based development environment";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/release-23.05";
+
+  outputs = { self, nixpkgs }:
+    let
+      javaVersion = 11;
+      nodeVersion = 18;
+      overlays = [
+        (final: prev: rec {
+          jdk = prev."jdk${toString javaVersion}";
+          nodejs = prev."nodejs-${toString nodeVersion}_x";
+          pnpm = prev.nodePackages.pnpm;
+        })
+      ];
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs { inherit overlays system; };
+      });
+    in
+    {
+      devShells = forEachSupportedSystem ({ pkgs }: {
+        default = pkgs.mkShell {
+          NIX_LD_LIBRARY_PATH = nixpkgs.lib.makeLibraryPath [
+            pkgs.stdenv.cc.cc.lib
+          ];
+          NIX_LD = nixpkgs.lib.fileContents "${pkgs.stdenv.cc}/nix-support/dynamic-linker";
+          packages = with pkgs; [ jdk nodejs pnpm stdenv ];
+        };
+      });
+    };
+}