diff --git a/script.sh b/script.sh
new file mode 100755
index 0000000..51acd86
--- /dev/null
+++ b/script.sh
@@ -0,0 +1,6 @@
+if ! (git diff --exit-code origin/master..master > /dev/null) \
+  || ! (git diff --exit-code master > /dev/null) \
+  || ! [[ -z "$(git status --porcelain)" ]] ; then
+  echo "Your local repo has some changes that aren't pushed to origin/master ."
+  exit 1
+fi
\ No newline at end of file