Implement core.path_exists() (#16647)

doc/lua_api.md

@@ -5962,7 +5962,8 @@ Utilities
       touch_controls = false,
   }
   ```
-
+* `core.path_exists(path)`: returns true if the given path exists else false
+    * `path` is the path that will be tested can be either a directory or a file
 * `core.mkdir(path)`: returns success.
     * Creates a directory specified by `path`, creating parent directories
       if they don't exist.

src/script/lua_api/l_util.cpp

@@ -263,6 +263,21 @@ int ModApiUtil::l_is_yes(lua_State *L)
 	return 1;
 }
 
+// path_exists(path)
+int ModApiUtil::l_path_exists(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+
+	std::string path = luaL_checkstring(L, 1); //path
+
+	CHECK_SECURE_PATH(L, path.c_str(), false);
+
+	bool exists = fs::PathExists(path);
+	lua_pushboolean(L, exists);
+
+	return 1;
+}
+
 // get_builtin_path()
 int ModApiUtil::l_get_builtin_path(lua_State *L)
 {
@@ -724,6 +739,8 @@ void ModApiUtil::Initialize(lua_State *L, int top)
 
 	API_FCT(is_yes);
 
+	API_FCT(path_exists);
+
 	API_FCT(get_builtin_path);
 	API_FCT(get_user_path);
 
@@ -809,6 +826,8 @@ void ModApiUtil::InitializeAsync(lua_State *L, int top)
 
 	API_FCT(is_yes);
 
+	API_FCT(path_exists);
+
 	API_FCT(get_builtin_path);
 	API_FCT(get_user_path);
 

src/script/lua_api/l_util.h

@@ -52,6 +52,9 @@ private:
 	// is_yes(arg)
 	static int l_is_yes(lua_State *L);
 
+	// path_exists(path)
+	static int l_path_exists(lua_State *L);
+
 	// get_builtin_path()
 	static int l_get_builtin_path(lua_State *L);