deploy: Check the --upgrade flag has been used correctly.

Most write extensions don't handle both initial deployments and upgrades
of a system.

1 files changed, 24 insertions, 0 deletions

diff --git a/tar.check b/tar.check
new file mode 100755
index 00000000..cbeaf163
--- /dev/null
+++ b/tar.check
@@ -0,0 +1,24 @@
+#!/bin/sh
+# Copyright (C) 2014  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Preparatory checks for Morph 'tar' write extension
+
+set -eu
+
+if [ "$UPGRADE" == "yes" ]; then
+    echo >&2 "ERROR: Cannot upgrade a tar file deployment."
+    exit 1
+fi