Load project metadata file only when needed

(cherry picked from commit 3dc47b0b847e4c42aeb0fd5e2f569c543b4f97ab)

editor/editor_settings.cpp

@@ -884,6 +884,10 @@ bool EditorSettings::_is_default_text_editor_theme(String p_theme_name) {
 	return p_theme_name == "default" || p_theme_name == "godot 2" || p_theme_name == "custom";
 }
 
+const String EditorSettings::_get_project_metadata_path() const {
+	return EditorPaths::get_singleton()->get_project_settings_dir().path_join("project_metadata.cfg");
+}
+
 // PUBLIC METHODS
 
 EditorSettings *EditorSettings::get_singleton() {
@@ -1171,24 +1175,31 @@ void EditorSettings::add_property_hint(const PropertyInfo &p_hint) {
 // Metadata
 
 void EditorSettings::set_project_metadata(const String &p_section, const String &p_key, Variant p_data) {
-	Ref<ConfigFile> cf = memnew(ConfigFile);
-	String path = EditorPaths::get_singleton()->get_project_settings_dir().path_join("project_metadata.cfg");
-	Error err;
-	err = cf->load(path);
-	ERR_FAIL_COND_MSG(err != OK && err != ERR_FILE_NOT_FOUND, "Cannot load editor settings from file '" + path + "'.");
-	cf->set_value(p_section, p_key, p_data);
-	err = cf->save(path);
-	ERR_FAIL_COND_MSG(err != OK, "Cannot save editor settings to file '" + path + "'.");
+	const String path = _get_project_metadata_path();
+
+	if (project_metadata.is_null()) {
+		project_metadata.instantiate();
+
+		Error err = project_metadata->load(path);
+		if (err != OK && err != ERR_FILE_NOT_FOUND) {
+			ERR_PRINT("Cannot load project metadata from file '" + path + "'.");
+		}
+	}
+	project_metadata->set_value(p_section, p_key, p_data);
+
+	Error err = project_metadata->save(path);
+	ERR_FAIL_COND_MSG(err != OK, "Cannot save project metadata to file '" + path + "'.");
 }
 
 Variant EditorSettings::get_project_metadata(const String &p_section, const String &p_key, Variant p_default) const {
-	Ref<ConfigFile> cf = memnew(ConfigFile);
-	String path = EditorPaths::get_singleton()->get_project_settings_dir().path_join("project_metadata.cfg");
-	Error err = cf->load(path);
-	if (err != OK) {
-		return p_default;
+	if (project_metadata.is_null()) {
+		project_metadata.instantiate();
+
+		const String path = _get_project_metadata_path();
+		Error err = project_metadata->load(path);
+		ERR_FAIL_COND_V_MSG(err != OK && err != ERR_FILE_NOT_FOUND, p_default, "Cannot load project metadata from file '" + path + "'.");
 	}
-	return cf->get_value(p_section, p_key, p_default);
+	return project_metadata->get_value(p_section, p_key, p_default);
 }
 
 void EditorSettings::set_favorites(const Vector<String> &p_favorites) {

editor/editor_settings.h

@@ -79,6 +79,7 @@ private:
 
 	HashSet<String> changed_settings;
 
+	mutable Ref<ConfigFile> project_metadata;
 	HashMap<String, PropertyInfo> hints;
 	HashMap<String, VariantContainer> props;
 	int last_order;
@@ -106,6 +107,7 @@ private:
 	void _load_godot2_text_editor_theme();
 	bool _save_text_editor_theme(String p_file);
 	bool _is_default_text_editor_theme(String p_theme_name);
+	const String _get_project_metadata_path() const;
 
 protected:
 	static void _bind_methods();