1 files changed, 26 insertions, 0 deletions
diff --git a/scripts/gemfile_lock_changed.sh b/scripts/gemfile_lock_changed.sh
new file mode 100755
index 00000000000..24e2c685f11
--- /dev/null
+++ b/scripts/gemfile_lock_changed.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+gemfile_lock_changed() {
+  if [ -n "$(git diff --name-only -- Gemfile.lock)" ]; then
+  cat << EOF
+  Gemfile was updated but Gemfile.lock was not updated.
+
+  Usually, when Gemfile is updated, you should run
+  \`\`\`
+  bundle install
+  \`\`\`
+
+  or
+
+  \`\`\`
+  bundle update <the-added-or-updated-gem>
+  \`\`\`
+
+  and commit the Gemfile.lock changes.
+EOF
+
+    exit 1
+  fi
+}
+
+gemfile_lock_changed