feat: expose actor argument (#9)

plugin.go

@@ -30,6 +30,7 @@ type (
 		Env          map[string]string
 		Image        string
 		EventPayload string // Webhook event payload
+		Actor        string
 		Verbose      bool
 	}
 
@@ -67,6 +68,12 @@ func (p Plugin) Exec() error {
 		"--detect-event",
 	}
 
+	// optional arguments
+	if p.Action.Actor != "" {
+		cmdArgs = append(cmdArgs, "--actor")
+		cmdArgs = append(cmdArgs, p.Action.Actor)
+	}
+
 	if p.Action.EventPayload != "" {
 		if err := ioutil.WriteFile(eventPayloadFile, []byte(p.Action.EventPayload), 0644); err != nil {
 			return errors.Wrap(err, "failed to write event payload to file")