1 files changed, 11 insertions, 0 deletions
diff --git a/dev/tools/check-overlays.sh b/dev/tools/check-overlays.sh
new file mode 100755
index 00000000..33a9ff05
--- /dev/null
+++ b/dev/tools/check-overlays.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+for f in $(git ls-files "dev/ci/user-overlays/")
+do
+    if ! ([[ "$f" = dev/ci/user-overlays/README.md ]] || [[ "$f" == *.sh ]])
+    then
+        >&2 echo "Bad overlay '$f'."
+        >&2 echo "User overlays need to have extension .sh to be picked up!"
+        exit 1
+    fi
+done