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-rwxr-xr-xextensions/tar.check23
1 files changed, 23 insertions, 0 deletions
diff --git a/extensions/tar.check b/extensions/tar.check
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--- /dev/null
+++ b/extensions/tar.check
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+#!/bin/sh
+# Copyright (C) 2014-2015 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, see <http://www.gnu.org/licenses/>.
+
+# 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