wip: nix flake

flake.nix

@@ -0,0 +1,57 @@
+{
+  description = "Stream VR games from your PC to your headset via Wi-Fi";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/master";
+    flake-utils.url = "github:numtide/flake-utils";  # TODO use upstream nix utils
+    openvr = {
+      url = "github:ValveSoftware/openvr";
+      flake = false;
+    };
+  };
+
+  outputs = { self, nixpkgs, flake-utils, openvr }: flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+          lib = pkgs.lib;
+          buildPackages = with pkgs; [rustc cargo pkg-config jack1 alsa-lib pipewire.dev openssl clang libclang glibc llvmPackages.libclang ffmpeg.dev];
+          dependencyPackages = with pkgs; [nasm vulkan-headers libva libdrm pipewire openssl ffmpeg];
+          nvidiaPackages = with pkgs.cudaPackages; [cuda_nvcc cuda_cudart libnpp];
+          devShell = {stdenv, nvidia}: pkgs.mkShell {
+            buildInputs = buildPackages ++ dependencyPackages ++ (lib.optionals nvidia nvidiaPackages);
+          };
+      in
+        {
+          packages.default = pkgs.rustPlatform.buildRustPackage rec {
+            pname = "alvr";
+            BINDGEN_EXTRA_CLANG_ARGS = [
+              ''-I"${pkgs.llvmPackages.libclang.lib}/lib/clang/${pkgs.llvmPackages.libclang.version}/include"''
+              "-I ${pkgs.glibc.dev}/include"
+            ];  # TODO
+            version = "21";  # TODO
+            OPENVR_PATH = "${openvr}";
+            doCheck = false;  # TODO
+            # LIBCLANG_PATH = "${pkgs.libclang.lib}/lib";
+            # LIBCLANG_PATH = "${pkgs.llvmPackages.libclang.lib}/lib";
+            postUnpack = ''
+            # Deal with submodules which is still annoying in Nix.
+            cp -aR $OPENVR_PATH $(ls | grep -- -source)/openvr
+            '';
+            src = ./.;
+            RUST_BACKTRACE = "full";  # TODO
+            nativeBuildInputs = buildPackages;
+            buildInputs = buildPackages ++ dependencyPackages;
+            dontCargoInstall = true;  # TODO
+            cargoLock = {
+              lockFile = ./Cargo.lock;
+              outputHashes = {
+                "openxr-0.17.1" = "sha256-fG/JEqQQwKP5aerANAt5OeYYDZxcvUKCCaVdWRqHBPU=";
+                "settings-schema-0.2.0" = "sha256-luEdAKDTq76dMeo5kA+QDTHpRMFUg3n0qvyQ7DkId0k=";
+              };
+            };
+            CARGO_MANIFEST_DIR = ./.;  # probably unneeded
+          };
+          devShells.default = devShell { stdenv = pkgs.stdenv; nvidia = false; };
+          devShells.nvidia  = devShell { stdenv = pkgs.stdenv; nvidia = true; };
+        }
+    );
+}