Revert "dont use pointer"

This reverts commit 40cea11.

cmd/helm-migrate-values/root.go

@@ -63,13 +63,13 @@ func NewRootCmd(actionConfig *action.Configuration, settings *cli.EnvSettings, o
 	var migrationDir string
 	flags.StringVar(&migrationDir, "migration-dir", "value-migrations", "Specifies the relative path to the directory containing migration definition files. The path should be relative to the Helm chart directory.")
 
-	runner := newRunner(actionConfig, flags, settings, out, migrationDir, &outputFile, log)
+	runner := newRunner(actionConfig, flags, settings, out, &migrationDir, &outputFile, log)
 	cmd.RunE = runner
 
 	return cmd, nil
 }
 
-func newRunner(actionConfig *action.Configuration, flags *pflag.FlagSet, settings *cli.EnvSettings, out io.Writer, migrationDir string, outputFile *string, log pkg.Logger) func(cmd *cobra.Command, args []string) error {
+func newRunner(actionConfig *action.Configuration, flags *pflag.FlagSet, settings *cli.EnvSettings, out io.Writer, migrationDir *string, outputFile *string, log pkg.Logger) func(cmd *cobra.Command, args []string) error {
 	// We use the install action for locating the chart
 	var installAction = action.NewInstall(actionConfig)
 	var listAction = action.NewList(actionConfig)
@@ -130,7 +130,7 @@ func newRunner(actionConfig *action.Configuration, flags *pflag.FlagSet, setting
 				return fmt.Errorf("failed to extract major version from chart version: %s", release.Chart.Metadata.Version)
 			}
 			relMajorVer, _ := strconv.Atoi(matches[1])
-			migrationsPath := filepath.Join(*chartDir, migrationDir)
+			migrationsPath := filepath.Join(*chartDir, *migrationDir)
 
 			// vTo is always nil, because it really only makes sense to migrate to the current chart version.
 			// The migrations library does support migrating to a specific version though.