feat: allow cmake built executable to be run anywhere

ScuffedMinecraft/src/Application.cpp

@@ -2,6 +2,10 @@
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_opengl3.h"
 
+#ifdef LINUX
+#include <cstdlib>
+#endif
+
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 #define STB_IMAGE_IMPLEMENTATION
@@ -56,8 +60,26 @@ float rectangleVertices[] =
 	-1.0f,  1.0f,  0.0f, 1.0f
 };
 
-int main()
-{
+int main (int argc, char *argv[]) {
+#ifdef LINUX
+  char* resolved_path = realpath(argv[0],NULL);
+  if (resolved_path == NULL) {
+    printf("%s: Please do not place binary in PATH\n", argv[0]);
+    exit(1);
+  }
+  size_t resolved_length = strlen(resolved_path);
+
+  // remove executable from path
+  for (size_t i = resolved_length; i > 0; i--) {
+    if (resolved_path[i] == '/' && resolved_path[i+1] != 0) {
+      resolved_path[i+1] = 0;
+      break;
+    }  
+  }
+  chdir(resolved_path);
+  free(resolved_path);
+#endif
+
 	// Initialize GLFW
 	glfwInit();
 	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
@@ -405,4 +427,4 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos)
 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
 {
 	camera.ProcessMouseScroll(yoffset);
-}
+}

ScuffedMinecraft/src/CMakeLists.txt

@@ -4,7 +4,11 @@ add_executable(scuffed_mc
   Camera.cpp Planet.cpp WorldGen.cpp ../vendor/glad.c
 )
 
+if(LINUX)
+  add_compile_definitions(LINUX)
+endif()
+
 # make sure the program runs in the right place from visual studio
 set_target_properties(scuffed_mc PROPERTIES VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}/bin")
 
-target_link_libraries(scuffed_mc imgui $<IF:$<PLATFORM_ID:Windows>,glfw3,glfw>)
+target_link_libraries(scuffed_mc imgui $<IF:$<PLATFORM_ID:Windows>,glfw3,glfw>)