allow junk go.mod & go.sum files

argv.go

@@ -14,6 +14,7 @@ type args struct {
 	Notes   bool `arg:"--metadata"                     help:"save as git metadata (notes)"`
 	Restore bool `arg:"--restore"   default:"true"     help:"restore from git metadata"`
 	Force   bool `arg:"--force"                        help:"remove the old one"`
+	Pure    bool `arg:"--pure"      default:"false"    help:"never leave go.* files unless things are perfect"`
 }
 
 func (args) Version() string {

exit.go

@@ -18,7 +18,9 @@ func badExit(check *gitpb.Repo, err error) {
 	log.DaemonMode(true)
 	log.Info("go-mod-clean failed: ", err, forge.GetGoSrc())
 	if check != nil {
-		eraseGoMod(check)
+		if argv.Pure {
+			eraseGoMod(check)
+		}
 	}
 	os.Exit(-1)
 }