vm: use error wrapping to detect ssh connection errors

This is a much cleaner logic than string matching.

1 files changed, 3 insertions, 1 deletions

diff --git a/vm/vmimpl/util.go b/vm/vmimpl/util.go
index 729e78de6..a0e3ce841 100644
--- a/vm/vmimpl/util.go
+++ b/vm/vmimpl/util.go
@@ -58,13 +58,15 @@ func WaitForSSH(timeout time.Duration, opts SSHOptions, OS string, stop chan err
 		}
 		if time.Since(startTime) > timeout {
 			return &osutil.VerboseError{
-				Err:    fmt.Errorf("can't ssh into the instance"),
+				Err:    ErrCantSSH,
 				Output: []byte(err.Error()),
 			}
 		}
 	}
 }
 
+var ErrCantSSH = fmt.Errorf("can't ssh into the instance")
+
 func SSHArgs(debug bool, sshKey string, port int, systemSSHCfg bool) []string {
 	return sshArgs(debug, sshKey, "-p", port, 0, systemSSHCfg)
 }