优化error输出

cmd/saastool/convert.go

@@ -38,8 +38,7 @@ func RunConvert(args ...string) error {
 	destPath := paramDestPath(fs)
 
 	if err := fs.Parse(args); err != nil {
-		fmt.Fprintln(os.Stderr, "command line parse error", "err", err)
-		return err
+		return fmt.Errorf("Command line parse error: %w", err)
 	}
 
 	if fs.NArg() > 0 || *mapCfgFile == "" || len(*sourcePath) == 0 || len(*destPath) == 0 {
@@ -49,8 +48,7 @@ func RunConvert(args ...string) error {
 
 	mapCfg, err := LoadMapFile(*mapCfgFile)
 	if err != nil {
-		fmt.Fprintln(os.Stderr, "LoadConfigFile error", "err", err)
-		return err
+		return fmt.Errorf("LoadMapFile error: %w", err)
 	}
 
 	convertParams := convertParams{