gitlab-ctl: show usage if no args passed

diff --git a/gitlab-ctl.sh b/gitlab-ctl.sh
index 088aafa688e1adad058432eb7e1741ff24b2db9b..e505480427ed6b098b0523c6d571c1031e19b220 100755 (executable)
--- a/gitlab-ctl.sh
+++ b/gitlab-ctl.sh
@@ -66,7 +66,24 @@ posttrans() {
        EOF
 }
 
-COMMAND=$1; shift
+usage() {
+       cat <<-EOF
+Usage: $0: command (subcommand)
+
+upgrade
+  Run migrations after a package upgrade
+
+       EOF
+}
+
+COMMAND=$1
+
+if [ -z "$COMMAND" ]; then
+       usage
+       exit 0
+fi
+
+shift
 case "$COMMAND" in
 preinst)
        preinst