From 17beb1d7ad47f65947faa9b30f5c656a2df97b9f Mon Sep 17 00:00:00 2001
From: Pawel Kilar <pkilar@gmail.com>
Date: Sat, 14 Oct 2017 21:38:44 +0100
Subject: [PATCH] Check if both SSH proxy and basiton are configured

---
 helper/communicator/config.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/helper/communicator/config.go b/helper/communicator/config.go
index d89a0ac27..5ecbdfc65 100644
--- a/helper/communicator/config.go
+++ b/helper/communicator/config.go
@@ -184,6 +184,10 @@ func (c *Config) prepareSSH(ctx *interpolate.Context) []error {
 			c.SSHFileTransferMethod))
 	}
 
+	if c.SSHBastionHost != "" && c.SSHProxyHost != "" {
+		errs = append(errs, errors.New("please specify either ssh_bastion_host or ssh_proxy_host, not both"))
+	}
+
 	return errs
 }