Lua API: Add `rmdir`, `cpdir` and `mvdir` (#9638)

Co-authored-by: rubenwardy <rw@rubenwardy.com>

doc/lua_api.txt

@@ -4624,6 +4624,19 @@ Utilities
 * `minetest.mkdir(path)`: returns success.
     * Creates a directory specified by `path`, creating parent directories
       if they don't exist.
+* `minetest.rmdir(path, recursive)`: returns success.
+    * Removes a directory specified by `path`.
+    * If `recursive` is set to `true`, the directory is recursively removed.
+      Otherwise, the directory will only be removed if it is empty.
+    * Returns true on success, false on failure.
+* `minetest.cpdir(source, destination)`: returns success.
+    * Copies a directory specified by `path` to `destination`
+    * Any files in `destination` will be overwritten if they already exist.
+    * Returns true on success, false on failure.
+* `minetest.mvdir(source, destination)`: returns success.
+    * Moves a directory specified by `path` to `destination`.
+    * If the `destination` is a non-empty directory, then the move will fail.
+    * Returns true on success, false on failure.
 * `minetest.get_dir_list(path, [is_dir])`: returns list of entry names
     * is_dir is one of:
         * nil: return all entries,

src/script/lua_api/l_util.cpp

@@ -349,6 +349,49 @@ int ModApiUtil::l_mkdir(lua_State *L)
 	return 1;
 }
 
+// rmdir(path, recursive)
+int ModApiUtil::l_rmdir(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+	const char *path = luaL_checkstring(L, 1);
+	CHECK_SECURE_PATH(L, path, true);
+
+	bool recursive = readParam<bool>(L, 2, false);
+
+	if (recursive)
+		lua_pushboolean(L, fs::RecursiveDelete(path));
+	else
+		lua_pushboolean(L, fs::DeleteSingleFileOrEmptyDirectory(path));
+
+	return 1;
+}
+
+// cpdir(source, destination)
+int ModApiUtil::l_cpdir(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+	const char *source = luaL_checkstring(L, 1);
+	const char *destination = luaL_checkstring(L, 2);
+	CHECK_SECURE_PATH(L, source, false);
+	CHECK_SECURE_PATH(L, destination, true);
+
+	lua_pushboolean(L, fs::CopyDir(source, destination));
+	return 1;
+}
+
+// mpdir(source, destination)
+int ModApiUtil::l_mvdir(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+	const char *source = luaL_checkstring(L, 1);
+	const char *destination = luaL_checkstring(L, 2);
+	CHECK_SECURE_PATH(L, source, true);
+	CHECK_SECURE_PATH(L, destination, true);
+
+	lua_pushboolean(L, fs::MoveDir(source, destination));
+	return 1;
+}
+
 // get_dir_list(path, is_dir)
 int ModApiUtil::l_get_dir_list(lua_State *L)
 {
@@ -588,6 +631,9 @@ void ModApiUtil::Initialize(lua_State *L, int top)
 	API_FCT(decompress);
 
 	API_FCT(mkdir);
+	API_FCT(rmdir);
+	API_FCT(cpdir);
+	API_FCT(mvdir);
 	API_FCT(get_dir_list);
 	API_FCT(safe_file_write);
 
@@ -651,6 +697,9 @@ void ModApiUtil::InitializeAsync(lua_State *L, int top)
 	API_FCT(decompress);
 
 	API_FCT(mkdir);
+	API_FCT(rmdir);
+	API_FCT(cpdir);
+	API_FCT(mvdir);
 	API_FCT(get_dir_list);
 
 	API_FCT(encode_base64);

src/script/lua_api/l_util.h

@@ -80,6 +80,15 @@ private:
 	// mkdir(path)
 	static int l_mkdir(lua_State *L);
 
+	// rmdir(path, recursive)
+	static int l_rmdir(lua_State *L);
+
+	// cpdir(source, destination, remove_source)
+	static int l_cpdir(lua_State *L);
+
+	// mvdir(source, destination)
+	static int l_mvdir(lua_State *L);
+
 	// get_dir_list(path, is_dir)
 	static int l_get_dir_list(lua_State *L);