nix: add flake and derivation

Referenced issue: waku-org/nwaku#3232

Signed-off-by: markoburcul <[email protected]>

.gitignore

@@ -10,6 +10,9 @@ debug/
 target/
 wabt/
 
+# Generated by Nix
+result/
+
 # These are backup files generated by rustfmt
 **/*.rs.bk
 

default.nix

@@ -0,0 +1,20 @@
+{ pkgs }:
+
+pkgs.rustPlatform.buildRustPackage {
+  pname = "zerokit";
+  version = "nightly";
+
+  src = ./.;
+
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+    allowBuiltinFetchGit = true;
+  };
+
+  CARGO_HOME = "/tmp";
+
+  meta = with pkgs.lib; {
+    description = "Zerokit";
+    license = licenses.mit;
+  };
+}

flake.nix

@@ -0,0 +1,26 @@
+{
+  description = "A flake for building zerokit";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+  };
+
+  outputs = { self, nixpkgs }: 
+    let
+      stableSystems = [
+        "x86_64-linux" "aarch64-linux"
+        "x86_64-darwin" "aarch64-darwin"
+        "x86_64-windows" "i686-linux"
+        "i686-windows"
+      ];
+      forAllSystems = nixpkgs.lib.genAttrs stableSystems;
+      pkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
+    in
+    {
+      packages = forAllSystems (system: let
+        pkgs = pkgsFor.${system};
+      in {
+        default = pkgs.callPackage ./default.nix {};
+      });
+    };
+}