Allow absent main.lua;

src/lovr.c

@@ -89,7 +89,7 @@ void lovrRun(lua_State* L, char* root) {
   }
 
   // Run "main.lua" which will override/define pieces of lovr
-  if (luaL_dofile(L, path)) {
+  if (fileExists(path) && luaL_dofile(L, path)) {
     error("Failed to run main.lua");
     lua_pop(L, 1);
     exit(EXIT_FAILURE);

src/util.c

@@ -19,6 +19,10 @@ void error(const char* format, ...) {
   exit(EXIT_FAILURE);
 }
 
+int fileExists(char* filename) {
+  return access(filename, F_OK) != -1;
+}
+
 char* loadFile(char* filename) {
   struct stat info;
 

src/util.h

@@ -3,6 +3,7 @@
 #include <lualib.h>
 
 void error(const char* format, ...);
+int fileExists(char* filename);
 char* loadFile(char* filename);
 void luaRegisterModule(lua_State* L, const char* name, const luaL_Reg* module);
 void luaRegisterType(lua_State* L, const char* name, const luaL_Reg* functions, lua_CFunction gc);