added nix flake (hacky, shipping sdl was a mistake)

.gitignore

@@ -11,6 +11,7 @@ cmake-build-release/
 *.coredump
 compile_commands.json
 /build*
+/result*
 .clangd
 .cache
 
@@ -20,3 +21,6 @@ compile_commands.json
 
 CMakeLists.txt.user*
 CMakeCache.txt
+
+*.tox
+imgui.ini

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1694553957,
+        "narHash": "sha256-8o15HEax53lBJjjcr5VHMpuuT6vBcrzSNB6y2iGlPaU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "e7fe745d22df5fa282b321e577fe18d4f62e0f0b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-23.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,99 @@
+{
+  description = "tomato flake";
+  # bc flakes and git submodules dont really like each other, you need to
+  # append '.?submodules=1' to the nix commands.
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/release-23.05";
+  };
+
+  outputs = { self, nixpkgs }:
+  let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+  in {
+    packages.${system}.default = pkgs.stdenv.mkDerivation {
+      pname = "tomato";
+      version = "0.0.0";
+
+      src = ./.;
+      submodules = 1;
+
+      nativeBuildInputs = with pkgs; [
+        cmake
+        ninja
+        pkg-config
+        patchelf
+      ];
+
+      # for some reason, buildInputs performs some magic an converts them to build dependencies, not runtime dependencies
+      # also, non static dependencies (?? how to ensure ??)
+      dlopenBuildInputs = with pkgs; [
+        xorg.libX11
+        xorg.libXext
+        xorg.xorgproto
+        xorg.libICE
+        xorg.libXi
+        xorg.libXScrnSaver
+        xorg.libXcursor
+        xorg.libXinerama
+        xorg.libXrandr
+        xorg.libXxf86vm
+        libGL
+      ];
+
+      buildInputs = with pkgs; [
+        #(libsodium.override { stdenv = pkgs.pkgsStatic.stdenv; })
+        #pkgsStatic.libsodium
+        libsodium
+      ] ++ self.packages.${system}.default.dlopenBuildInputs;
+
+      # TODO: replace with install command
+      installPhase = ''
+        mkdir -p $out/bin
+        mv bin/tomato $out/bin
+      '';
+
+      # copied from nixpkgs's SDL2 default.nix
+      # SDL is weird in that instead of just dynamically linking with
+      # libraries when you `--enable-*` (or when `configure` finds) them
+      # it `dlopen`s them at runtime. In principle, this means it can
+      # ignore any missing optional dependencies like alsa, pulseaudio,
+      # some x11 libs, wayland, etc if they are missing on the system
+      # and/or work with wide array of versions of said libraries. In
+      # nixpkgs, however, we don't need any of that. Moreover, since we
+      # don't have a global ld-cache we have to stuff all the propagated
+      # libraries into rpath by hand or else some applications that use
+      # SDL API that requires said libraries will fail to start.
+      #
+      # You can grep SDL sources with `grep -rE 'SDL_(NAME|.*_SYM)'` to
+      # list the symbols used in this way.
+      # TODO: only patch if building FOR nix (like not for when static building)
+      postFixup =
+        let
+          #rpath = lib.makeLibraryPath (dlopenPropagatedBuildInputs ++ dlopenBuildInputs);
+          rpath = nixpkgs.lib.makeLibraryPath (self.packages.${system}.default.dlopenBuildInputs);
+        in
+        nixpkgs.lib.optionalString (pkgs.stdenv.hostPlatform.extensions.sharedLibrary == ".so") ''
+          patchelf --set-rpath "$(patchelf --print-rpath $out/bin/tomato):${rpath}" "$out/bin/tomato"
+        '';
+    };
+
+    devShells.${system}.default = pkgs.mkShell {
+      #inputsFrom = with pkgs; [ SDL2 ];
+      buildInputs = [ self.packages.${system}.default ]; # this makes a prebuild tomato available in the shell, do we want this?
+
+      packages = with pkgs; [
+        cmake
+        pkg-config
+      ];
+
+      shellHook = "echo hello to tomato dev shell!";
+    };
+
+    apps.${system}.default = {
+      program = "${self.packages.${system}.default}/bin/tomato";
+      type = "app";
+    };
+  };
+}