Fix CLI export when export_path is in preset.

Export presets contains the export_path option, to specify the default
export location, but the CLI export option disregarded that, and always
required and export path to be specified.
After this commit, if the export path is not specified in the command,
the one in the preset will be used, erroring only if it's not present or
invalid.

editor/editor_node.cpp

@@ -760,15 +760,18 @@ void EditorNode::_fs_changed() {
 					preset_name);
 		} else {
 			Ref<EditorExportPlatform> platform = preset->get_platform();
-			if (platform.is_null()) {
+			const String export_path = export_defer.path.empty() ? preset->get_export_path() : export_defer.path;
+			if (export_path.empty()) {
+				export_error = vformat("Export preset '%s' doesn't have a default export path, and none was specified.", preset_name);
+			} else if (platform.is_null()) {
 				export_error = vformat("Export preset '%s' doesn't have a matching platform.", preset_name);
 			} else {
 				Error err = OK;
 				if (export_defer.pack_only) { // Only export .pck or .zip data pack.
-					if (export_defer.path.ends_with(".zip")) {
-						err = platform->export_zip(preset, export_defer.debug, export_defer.path);
-					} else if (export_defer.path.ends_with(".pck")) {
-						err = platform->export_pack(preset, export_defer.debug, export_defer.path);
+					if (export_path.ends_with(".zip")) {
+						err = platform->export_zip(preset, export_defer.debug, export_path);
+					} else if (export_path.ends_with(".pck")) {
+						err = platform->export_pack(preset, export_defer.debug, export_path);
 					}
 				} else { // Normal project export.
 					String config_error;
@@ -777,7 +780,7 @@ void EditorNode::_fs_changed() {
 						ERR_PRINT(vformat("Cannot export project with preset '%s' due to configuration errors:\n%s", preset_name, config_error));
 						err = missing_templates ? ERR_FILE_NOT_FOUND : ERR_UNCONFIGURED;
 					} else {
-						err = platform->export_project(preset, export_defer.debug, export_defer.path);
+						err = platform->export_project(preset, export_defer.debug, export_path);
 					}
 				}
 				switch (err) {
@@ -787,7 +790,7 @@ void EditorNode::_fs_changed() {
 						export_error = vformat("Project export failed for preset '%s', the export template appears to be missing.", preset_name);
 						break;
 					case ERR_FILE_BAD_PATH:
-						export_error = vformat("Project export failed for preset '%s', the target path '%s' appears to be invalid.", preset_name, export_defer.path);
+						export_error = vformat("Project export failed for preset '%s', the target path '%s' appears to be invalid.", preset_name, export_path);
 						break;
 					default:
 						export_error = vformat("Project export failed with error code %d for preset '%s'.", (int)err, preset_name);

main/main.cpp

@@ -1890,14 +1890,6 @@ bool Main::start() {
 		return false;
 	}
 
-	if (_export_preset != "") {
-		if (positional_arg == "") {
-			String err = "Command line includes export parameter option, but no destination path was given.\n";
-			err += "Please specify the binary's file path to export to. Aborting export.";
-			ERR_PRINT(err);
-			return false;
-		}
-	}
 #endif
 
 	if (script == "" && game_path == "" && String(GLOBAL_DEF("application/run/main_scene", "")) != "") {