Fix nix flake and use gcc as compiler

.gitignore

@@ -12,3 +12,5 @@ include/bindings/ruby_compiled.h
 p.vim
 
 .cache/
+
+result

Makefile

@@ -2,16 +2,16 @@ SRC_DIR := src
 BIN_DIR := bin
 OBJ_DIR := build
 INCLUDE_DIR := include
+SCRIPT_DIR := scripts
 
-TARGET_DEBUG := $(BIN_DIR)/game-dbg
-TARGET_RELEASE := $(BIN_DIR)/game
+TARGET_DEBUG := $(BIN_DIR)/misth-dbg
+TARGET_RELEASE := $(BIN_DIR)/misth
 
 PCH_DEBUG := $(OBJ_DIR)/debug/pch.h.gch
 PCH_RELEASE := $(OBJ_DIR)/release/pch.h.gch
 
-CCACHE := ccache
-CXX := $(CCACHE) $(shell which clang++)
-CC := $(CCACHE) $(shell which clang)
+CC ?= gcc
+CXX ?= g++
 
 # ---------------- SDL3 ----------------
 
@@ -19,6 +19,11 @@ SDL_CFLAGS := $(shell pkg-config --cflags sdl3 sdl3-ttf sdl3-image)
 SDL_LIBS_DEBUG := $(shell pkg-config --libs sdl3 sdl3-ttf sdl3-image)
 SDL_LIBS_RELEASE := $(shell pkg-config --libs sdl3 sdl3-ttf sdl3-image)
 
+# ----------------- MRUBY --------------
+
+MRUBY_CFLAGS := -I$(MRUBY_INCLUDE)
+MRUBY_LIBS := $(MRUBY_LIB)
+
 # ---------------- FLAGS ----------------
 
 CFLAGS_DEBUG := \
@@ -26,25 +31,18 @@ CFLAGS_DEBUG := \
 	-Og -g -fno-omit-frame-pointer \
 	-Wno-unused-command-line-argument \
 	-I./include -I./libs/mruby/build/host/include \
-	$(SDL_CFLAGS)
+	$(SDL_CFLAGS) $(MRUBY_CFLAGS)
 
 CFLAGS_RELEASE := \
-	-std=c++20 -O3 -march=x86-64 -mtune=generic \
-	-flto=thin \
+	-std=c++20 -O3 -mtune=generic \
 	-fno-rtti -fomit-frame-pointer -DNDEBUG -s \
 	-Wno-unused-command-line-argument \
 	-I./include -I./libs/mruby/build/host/include \
-	$(SDL_CFLAGS)
+	$(SDL_CFLAGS) $(MRUBY_CFLAGS)
 
 PCH_CFLAGS_DEBUG := $(CFLAGS_DEBUG) -x c++-header
 PCH_CFLAGS_RELEASE := $(CFLAGS_RELEASE) -x c++-header
 
-# ---------------- LIBS ----------------
-
-LIBS := ./libs/mruby/build/host/lib/libmruby.a
-
-MGEM_DIR := ./libs/l_mgems
-
 # ---------------- SOURCES ----------------
 
 SRC := $(shell find $(SRC_DIR) -name "*.cc")
@@ -57,18 +55,18 @@ DEP_RELEASE := $(OBJ_RELEASE:.o=.d)
 
 # ---------------- TARGETS ----------------
 
-.PHONY: all debug release clean mgems
+.PHONY: all debug release clean scripts
 
-all: debug
+all: release
 
-debug: mgems $(TARGET_DEBUG)
+debug: scripts $(TARGET_DEBUG)
 
-release: mgems $(TARGET_RELEASE)
+release: scripts $(TARGET_RELEASE)
 
 # ---------------- MRB_MGEMS ----------------
 
-mgems:
-	@$(MGEM_DIR)/compile.sh
+scripts:
+	bash $(SCRIPT_DIR)/compile.sh
 
 # ---------------- PCH ----------------
 
@@ -86,12 +84,12 @@ $(PCH_RELEASE): $(INCLUDE_DIR)/pch.h
 
 $(TARGET_DEBUG): $(PCH_DEBUG) $(OBJ_DEBUG)
 	@mkdir -p $(BIN_DIR)
-	@$(CXX) $(CFLAGS_DEBUG) -o $@ $(OBJ_DEBUG) $(SDL_LIBS_DEBUG) $(LIBS)
+	@$(CXX) $(CFLAGS_DEBUG) -o $@ $(OBJ_DEBUG) $(SDL_LIBS_DEBUG) $(MRUBY_LIBS)
 	@echo "Debug build complete: $@"
 
 $(TARGET_RELEASE): $(PCH_RELEASE) $(OBJ_RELEASE)
 	@mkdir -p $(BIN_DIR)
-	@$(CXX) $(CFLAGS_RELEASE) -o $@ $(OBJ_RELEASE) $(SDL_LIBS_RELEASE) $(LIBS)
+	@$(CXX) $(CFLAGS_RELEASE) -o $@ $(OBJ_RELEASE) $(SDL_LIBS_RELEASE) $(MRUBY_LIBS)
 	@echo "Release build complete: $@"
 
 # ---------------- COMPILE ----------------
@@ -115,5 +113,5 @@ $(OBJ_DIR)/release/%.o: $(SRC_DIR)/%.cc $(PCH_RELEASE)
 
 clean:
 	@rm -rf $(OBJ_DIR) $(BIN_DIR)
-	@$(MGEM_DIR)/compile.sh clean
+	bash $(SCRIPT_DIR)/compile.sh clean
 	@echo "Cleaned build artifacts."

flake.nix

@@ -1,43 +1,119 @@
 {
-  description = "game";
+  description = "Project Misth";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    self.submodules = true;
   };
 
-  outputs = { self, nixpkgs }:
+  outputs =
+    { nixpkgs, ... }:
     let
-      systems = [ "x86_64-linux" ];
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
 
-      forAllSystems = f:
-        nixpkgs.lib.genAttrs systems (system:
-          f (import nixpkgs {
-            inherit system;
-          }));
-    in {
-      devShells = forAllSystems (pkgs: {
-        default = pkgs.mkShell {
-          packages = with pkgs; [
-            clang-tools
-            clang
-            ccache
-            pkg-config
-            gnumake
-            ruby
-            xxd
-            bear
+      mruby = pkgs.stdenv.mkDerivation {
+        pname = "mruby";
+        version = "0.0.1";
 
-            sdl3
-            sdl3-ttf
-            sdl3-image
-          ];
-
-          shellHook = ''
-            export CC=clang
-            export CXX=clang++
-            export LD=clang
-          '';
+        src = pkgs.lib.cleanSourceWith {
+          src = ./libs;
+          name = "mruby-src";
         };
-      });
+
+        patches = [
+          ./libs/changes.patch
+        ];
+
+        nativeBuildInputs = with pkgs; [
+          ruby
+          gnumake
+        ];
+
+        buildPhase = ''
+          cd mruby
+          rake
+        '';
+
+        installPhase = ''
+          mkdir -p $out
+
+          cp -r build/host/lib $out/lib
+          cp -r build/host/include $out/include
+
+          mkdir -p $out/bin
+          cp build/host/bin/mrbc $out/bin/mrbc
+        '';
+      };
+
+      misth = pkgs.stdenv.mkDerivation {
+        pname = "misth";
+        version = "0.1.0";
+
+        src = ./.;
+
+        nativeBuildInputs = with pkgs; [
+          pkg-config
+          gnumake
+          bear
+          xxd
+          bash
+        ];
+
+        buildInputs = with pkgs; [
+          sdl3
+          sdl3-ttf
+          sdl3-image
+
+          mruby
+        ];
+
+        buildPhase = ''
+          make \
+            MRBC=${mruby}/bin/mrbc \
+            MRUBY_INCLUDE=${mruby}/include \
+            MRUBY_LIB=${mruby}/lib/libmruby.a
+        '';
+
+        installPhase = ''
+          mkdir -p $out/bin
+          cp bin/misth $out/bin/misth
+        '';
+      };
+
+    in
+    {
+      packages.${system} = {
+        default = misth;
+        misth = misth;
+        mruby = mruby;
+      };
+
+      devShells.${system}.default = pkgs.mkShell {
+        inputsFrom = [ misth ];
+
+        packages = with pkgs; [
+          clang-tools
+          pkg-config
+          ccache
+          gnumake
+          bear
+          ruby
+          xxd
+
+          sdl3
+          sdl3-ttf
+          sdl3-image
+        ];
+
+        shellHook = ''
+          export CC="ccache gcc"
+          export CXX="ccache g++"
+
+          export MRBC=${mruby}/bin/mrbc
+          export MRUBY_INCLUDE=${mruby}/include
+          export MRUBY_LIB=${mruby}/lib/libmruby.a
+        '';
+      };
     };
 }

include/app/elements.h

@@ -73,8 +73,8 @@ private:
 };
 
 struct ERect : Element {
-  Color color = {255, 255, 255};
   Vec2<float> shape = {0, 0};
+  Color color = {255, 255, 255};
 
   Vec2<float> size() override;
 

include/ecs/ecs.h

@@ -3,8 +3,12 @@
 
 #include "utils.h"
 
-struct Entity;
+struct Entity {};
 struct Component;
 struct System;
 
+struct EntityPool {
+  Entity entities[];
+};
+
 #endif

libs/changes.patch

@@ -0,0 +1,30 @@
+--- ./mruby/build_config/default.rb
++++ ./mruby/build_config/default.rb
+@@ -1,6 +1,18 @@
+ MRuby::Build.new do |conf|
+   # load specific toolchain settings
+-  conf.toolchain
++  conf.toolchain :gcc
++
++  conf.cc do |cc|
++    cc.command = ENV['CC']
++  end
++
++  conf.cxx do |cxx|
++    cxx.command = ENV['CXX']
++  end
++
++  conf.linker do |linker|
++    linker.command = ENV['CXX']
++  end
+ 
+   # Use mrbgems
+   # conf.gem 'examples/mrbgems/ruby_extension_example'
+@@ -79,5 +79,5 @@
+   # Turn on `enable_debug` for better debugging
+   # conf.enable_debug
+-  conf.enable_bintest
+-  conf.enable_test
++  # conf.enable_bintest
++  # conf.enable_test
+ end

samples/button.rb

@@ -58,12 +58,18 @@ rect.click do
 end
 
 App.map_key :mouse_left, :action_name
+App.map_key :q, :quit
 
 start = Time.now
 c_ = 0.0
 c_c = 0
 
 App.update do |delta_time|
+  if App.pressed?(:quit)
+    App.exit!
+    next
+  end
+
   c_ += delta_time
   c_c += 1
 

scripts/compile.sh

@@ -4,7 +4,7 @@ set -e
 
 SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
 OUTPUT_TMP=$(mktemp)
-OUTPUT="$SCRIPT_DIR/../../include/bindings/ruby_compiled.h"
+OUTPUT="$SCRIPT_DIR/../include/bindings/ruby_compiled.h"
 
 if test "$1" = "clean"; then
   rm -f "$OUTPUT"
@@ -28,7 +28,7 @@ fi
 
 echo "Compiling mgems..."
 
-"$SCRIPT_DIR/../mruby/bin/mrbc" -o "$OUTPUT_TMP" "${FILES[@]}"
+"${MRBC:-mrbc}" -o "$OUTPUT_TMP" "${FILES[@]}"
 
 {
   echo "#ifndef MGEMS_H"