Implement 'aws_ssm' connection type #26

internal/client/connection_ssh.go

@@ -94,11 +94,10 @@ func (s *SSHConnection) Command(cmdLine []string) ([]byte, error) {
 		return nil, fmt.Errorf("ssh: cannot create command '%s' for host '%s': %w", strings.Join(cmdLine, " "), s.host, err)
 	}
 	out, err := cmd.CombinedOutput()
-	if err != nil {
-		if len(out) > 0 {
-			return nil, fmt.Errorf("ssh: cannot run command '%s': %w\n\n%s", cmd, err, string(out))
-		}
-		return nil, err
+	if err != nil && len(out) > 0 {
+		return nil, fmt.Errorf("ssh: cannot run command '%s': %w\n\n%s", cmd, err, string(out))
+	} else if err != nil {
+		return nil, fmt.Errorf("ssh: cannot run command '%s': %w", cmd, err)
 	}
 	return out, nil
 }