add flake for vulkan dev (host)

.envrc

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

.gitignore

@@ -3,6 +3,7 @@
 /build/
 /prof-*.gz
 /env
+/.direnv
 
 /internal/pkg/stitch/*.jpg
 /internal/pkg/stitch/*.MISSING

flake.nix

@@ -0,0 +1,54 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+  } @ inputs: let
+    lib = nixpkgs.lib;
+    system = "x86_64-linux";
+    pkgs = import inputs.nixpkgs {
+      system = system;
+    };
+  in {
+    formatter.${system} = nixpkgs.legacyPackages.${system}.alejandra;
+
+    devShells.${system}.default = pkgs.mkShell rec {
+      nativeBuildInputs = with pkgs; [];
+      packages = with pkgs; [];
+
+      buildInputs = with pkgs; [
+        # Build tools
+        gcc
+        pkg-config
+        clang-tools
+        gnumake
+        curl
+        go
+
+        # Cross
+        pkgsCross.aarch64-multiplatform.buildPackages.gcc # Provides aarch64-unknown-linux-gnu-gcc
+
+        # Vulkan bare tools and depencencies
+        glslang
+        vulkan-headers
+        vulkan-loader
+        vulkan-validation-layers
+
+        # More Vulkan tools
+        vulkan-extension-layer
+        vulkan-tools
+        vulkan-tools-lunarg
+        vulkan-volk
+      ];
+
+      LD_LIBRARY_PATH = "${lib.makeLibraryPath buildInputs}";
+      VK_LAYER_PATH = "${pkgs.vulkan-validation-layers}/share/vulkan/explicit_layer.d";
+      VULKAN_SDK = "${pkgs.vulkan-validation-layers}/share/vulkan/explicit_layer.d";
+      XDG_DATA_DIRS = builtins.getEnv "XDG_DATA_DIRS";
+      XDG_RUNTIME_DIR = "/run/user/1000";
+    };
+  };
+}