add nix package definition

Co-authored-by: Julian Groß  <julian.g@posteo.de>

Author: RTUnreal

flake.lock

@@ -0,0 +1,79 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+  outputs =
+    inputs:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } (
+      { inputs, ... }:
+      {
+        systems = [
+          "x86_64-linux"
+          "aarch64-linux"
+          "aarch64-darwin"
+        ];
+
+        perSystem =
+          {
+            pkgs,
+            lib,
+            self',
+            inputs',
+            ...
+          }:
+          {
+            packages = {
+              glad = pkgs.callPackage ./nix/glad.nix { };
+              etc2comp = pkgs.callPackage ./nix/etc2comp.nix { };
+
+              cgltf = pkgs.callPackage ./nix/cgltf.nix { };
+
+              artery-font-format = pkgs.callPackage ./nix/artery-font-format.nix { };
+
+              polyvox = pkgs.callPackage ./nix/polyvox.nix { };
+
+              gif_creator = pkgs.callPackage ./nix/gif_creator.nix { };
+
+              scribe = pkgs.callPackage ./nix/scribe.nix { };
+
+              overte = pkgs.callPackage ./nix/overte.nix {
+                inherit (self'.packages)
+                  glad
+                  scribe
+                  gif_creator
+                  polyvox
+                  artery-font-format
+                  cgltf
+                  etc2comp
+                  draco
+                  glm
+                  ;
+                libv8 = pkgs.nodejs.libv8;
+              };
+
+              # TODO: update/remove when overte updates to more modern version
+              draco = pkgs.callPackage ./nix/draco.nix { };
+
+              glm = pkgs.callPackage ./nix/glm.nix { };
+            };
+            devShells.default = pkgs.mkShell {
+              packages = [
+                pkgs.conan
+                pkgs.ninja
+                pkgs.gdb
+              ];
+              inputsFrom = [ self'.packages.overte ];
+
+              NVTT_DIR = "${pkgs.nvidia-texture-tools}";
+              GLSLANG_DIR = "${pkgs.glslang}/bin";
+              SCRIBE_DIR = "${self'.packages.scribe}/tools";
+              SPIRV_CROSS_DIR = "${pkgs.spirv-cross}/bin";
+              SPIRV_TOOLS_DIR = "${pkgs.spirv-tools}/bin";
+              # Enable function alignment to fix crashes in relation to V8 scripting engine
+              CXXFLAGS = "-falign-functions";
+            };
+          };
+      }
+    );
+}

flake.nix

@@ -0,0 +1,16 @@
+{ stdenv, fetchFromGitHub }:
+stdenv.mkDerivation rec {
+  pname = "artery-font-format";
+  version = "1.1";
+  src = fetchFromGitHub {
+    owner = "Chlumsky";
+    repo = "artery-font-format";
+    tag = "v${version}";
+    hash = "sha256-JozvSQJt/62083sGX0jwMC2xmmpYrGvwd9MIfHtnqCs=";
+  };
+
+  installPhase = ''
+    mkdir -p $out/include/
+    cp -r artery-font $out/include/
+  '';
+}

nix/artery-font-format.nix

@@ -0,0 +1,22 @@
+{
+  stdenv,
+  fetchFromGitHub,
+}:
+stdenv.mkDerivation rec {
+  pname = "cgltf";
+  version = "1.15";
+  src = fetchFromGitHub {
+    owner = "jkuhlmann";
+    repo = "cgltf";
+    tag = "v${version}";
+    hash = "sha256-e+sVqcdOuLhsDHVntGzAwxtPxookrn706yEWDzNVvgI=";
+  };
+  outputs = [
+    "out"
+    "dev"
+  ];
+  installPhase = ''
+    mkdir -p $dev/include $out
+    cp cgltf* $dev/include/
+  '';
+}

nix/cgltf.nix

@@ -0,0 +1,36 @@
+diff --git a/src/draco/core/hash_utils.h b/src/draco/core/hash_utils.h
+index dd910d0..1ca934f 100644
+--- a/src/draco/core/hash_utils.h
++++ b/src/draco/core/hash_utils.h
+@@ -16,6 +16,7 @@
+ #define DRACO_CORE_HASH_UTILS_H_
+ 
+ #include <stdint.h>
++#include <cstddef>
+ 
+ #include <functional>
+ 
+diff --git a/src/draco/io/file_utils.h b/src/draco/io/file_utils.h
+index 18f0f59..44c3258 100644
+--- a/src/draco/io/file_utils.h
++++ b/src/draco/io/file_utils.h
+@@ -15,6 +15,7 @@
+ #ifndef DRACO_IO_FILE_UTILS_H_
+ #define DRACO_IO_FILE_UTILS_H_
+ 
++#include <cstdint>
+ #include <string>
+ #include <vector>
+ 
+diff --git a/src/draco/io/parser_utils.cc b/src/draco/io/parser_utils.cc
+index 6e42a58..45df9d1 100644
+--- a/src/draco/io/parser_utils.cc
++++ b/src/draco/io/parser_utils.cc
+@@ -18,6 +18,7 @@
+ #include <cctype>
+ #include <cmath>
+ #include <iterator>
++#include <limits>
+ 
+ namespace draco {
+ namespace parser {

nix/draco.diff

@@ -0,0 +1,26 @@
+# copied from: https://github.com/NixOS/nixpkgs/blob/6a78816d7420ba5cb3093d4f0412d2bf0a57bfdd/pkgs/development/libraries/draco/default.nix
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  cmake,
+}:
+stdenv.mkDerivation rec {
+  version = "1.3.6";
+  pname = "draco";
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "draco";
+    rev = version;
+    hash = "sha256-QJUEF+AzI+Nt52CvVKETFxOgOzFVfo8SNtpa/dCHTRk=";
+  };
+  patches = [ ./draco.diff ];
+  enableParallelBuilding = true;
+  nativeBuildInputs = [ cmake ];
+  cmakeFlags = [
+    # Fake these since we are building from a tarball
+    "-Ddraco_git_hash=${version}"
+    "-Ddraco_git_desc=${version}"
+    "-DBUILD_UNITY_PLUGIN=1"
+  ];
+}

nix/draco.nix

@@ -0,0 +1,28 @@
+{
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+}:
+stdenv.mkDerivation {
+  pname = "etc2comp";
+  version = "unstable-2022-06-01";
+  src = fetchFromGitHub {
+    owner = "google";
+    repo = "etc2comp";
+    rev = "39422c1aa2f4889d636db5790af1d0be6ff3a226";
+    hash = "sha256-mLr2Fsn9s9eWi71ljCll8c1hCk+dW6jCr7GG67ZTZ00=";
+  };
+  nativeBuildInputs = [ cmake ];
+  outputs = [
+    "out"
+    "dev"
+    "lib"
+  ];
+  installPhase = ''
+    mkdir -p $lib/lib $dev/include $out/bin
+    cp EtcLib/libEtcLib.a $lib/lib/
+    cp EtcTool/EtcTool $out/bin/
+    cp -r ../EtcLib $dev/include/
+  '';
+  meta.mainProgram = "EtcTool";
+}

nix/etc2comp.nix

@@ -0,0 +1,14 @@
+{ stdenv, fetchzip }:
+stdenv.mkDerivation {
+  pname = "GifCreator";
+  version = "2016.11";
+  src = fetchzip {
+    url = "https://build-deps.overte.org/dependencies/GifCreator.zip";
+    hash = "sha256-WxYVy8T10ASsrvnHUdaoeh7befsFDlpR6ZsFtXTgFWA=";
+  };
+
+  installPhase = ''
+    mkdir -p $out/include/GifCreator
+    cp GifCreator.h $out/include/GifCreator/
+  '';
+}