add nix build from flake

flake.nix

@@ -14,6 +14,7 @@
         pkgs = import nixpkgs {
           inherit system overlays;
         };
+        optisize = pkgs.callPackage ./nix/optisize.nix { };
       in
       with pkgs;
       {
@@ -28,6 +29,7 @@
 
           shellHook = '' '';
         };
+        packages.default = optisize;
       }
     );
 }

nix/optisize.nix

@@ -0,0 +1,32 @@
+{ rustPlatform
+, version ? "git"
+, lib
+, makeWrapper
+, withHandbrake ? true
+, handbrake
+}:
+rustPlatform.buildRustPackage {
+  pname = "optisize";
+  inherit version;
+  src = ../.;
+  cargoLock.lockFile = ../Cargo.lock;
+
+  nativeBuildInputs = [ makeWrapper ];
+  postInstall = with lib;
+    let
+      runtimePaths = [ ]
+        ++ optional withHandbrake handbrake;
+    in
+    ''
+      wrapProgram $out/bin/optisize \
+        --prefix PATH : "${makeBinPath runtimePaths}"
+    '';
+
+  meta = {
+    description = "CLI utility to optimize file sizes by matching appropriate optimization scripts";
+    homepage = "https://github.com/equirosa/optisize";
+    license = lib.licenses.agpl3;
+    maintainers = with lib.maintainers; [ equirosa ];
+  };
+}
+