adding reproducible flag (#205)

* adding reproducible test

* newer version of go-containerregistry

* new ImageOptions

* switch reproducible flag to default to false

* small fixes

* update dep

cmd/executor/cmd/root.go

@@ -41,6 +41,7 @@ var (
 	buildArgs                   multiArg
 	tarPath                     string
 	singleSnapshot              bool
+	reproducible                bool
 )
 
 func init() {
@@ -56,6 +57,7 @@ func init() {
 	RootCmd.PersistentFlags().BoolVarP(&force, "force", "", false, "Force building outside of a container")
 	RootCmd.PersistentFlags().StringVarP(&tarPath, "tarPath", "", "", "Path to save the image in as a tarball instead of pushing")
 	RootCmd.PersistentFlags().BoolVarP(&singleSnapshot, "single-snapshot", "", false, "Set this flag to take a single snapshot at the end of the build.")
+	RootCmd.PersistentFlags().BoolVarP(&reproducible, "reproducible", "", false, "Strip timestamps out of the image to make it reproducible")
 }
 
 var RootCmd = &cobra.Command{
@@ -87,6 +89,7 @@ var RootCmd = &cobra.Command{
 			SnapshotMode:   snapshotMode,
 			Args:           buildArgs,
 			SingleSnapshot: singleSnapshot,
+			Reproducible:   reproducible,
 		})
 		if err != nil {
 			logrus.Error(err)