/apps/twnlua: report error on loading

apps/twnlua/game.c

@@ -136,10 +136,6 @@ void game_tick(void) {
         lua_pop(state->L, 2);
 
         /* binding */
-        // lua_register(state->L, "sprite", b_sprite);
-        // lua_register(state->L, "rectangle", b_rectangle);
-        // lua_register(state->L, "text", b_text);
-
         bindgen_load_twn(state->L);
 
         /* now finally get to running the code */
@@ -149,14 +145,23 @@ void game_tick(void) {
             if (lua_pcall(state->L, 0, 0, 0) != LUA_OK) {
                 log_critical("%s", lua_tostring(state->L, -1));
                 lua_pop(state->L, 1);
+            } else
+                state->loaded_successfully = true;
+        } else {
+            /* got some sort of error, it should be pushed on top of the stack */
+            SDL_assert(lua_isstring(state->L, -1));
+            log_critical("Error loading /scripts/game.lua entry: %s", luaL_tolstring(state->L, -1, NULL));
+            lua_pop(state->L, 1);
         }
-        }
+
         free(game_buf);
+
         /* from this point we have access to everything defined in lua */
     }
 
     State *state = ctx.udata;
 
+    if (state->loaded_successfully) {
         bindgen_build_context(state->L);
         lua_getglobal(state->L, "ctx");
         if (!lua_isnoneornil(state->L, -1)) {
@@ -174,6 +179,7 @@ void game_tick(void) {
 
         lua_getglobal(state->L, "ctx");
         bindgen_upload_context(state->L);
+    }
 }
 
 

apps/twnlua/state.h

@@ -3,9 +3,11 @@
 
 #include <lua.h>
 
+#include <stdbool.h>
 
 typedef struct State {
     lua_State *L;
+    bool loaded_successfully;
 } State;