From d74b93584564161b2de771089ee697f07d8bd5b5 Mon Sep 17 00:00:00 2001
From: poy <poy@google.com>
Date: Wed, 8 May 2019 10:21:24 -0600
Subject: [PATCH] ci: adds check to ensure go modules are up to date

---
 .travis.yml        |  1 +
 ci/check_go_mod.sh | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100755 ci/check_go_mod.sh

diff --git a/.travis.yml b/.travis.yml
index 54f22535..f7a32d9b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,4 +12,5 @@ script:
   - go install github.com/golang/mock/mockgen
   - ./ci/check_go_fmt.sh
   - ./ci/check_go_generate.sh
+  - ./ci/check_go_mod.sh
   - go test -v ./...
diff --git a/ci/check_go_mod.sh b/ci/check_go_mod.sh
new file mode 100755
index 00000000..56e79127
--- /dev/null
+++ b/ci/check_go_mod.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+# This script is used to ensure that the go.mod file is up to date.
+
+set -euo pipefail
+
+go mod tidy
+
+if [ ! -z "$(git status --porcelain)" ]; then
+    git status
+    echo
+    echo "The go.mod is not up to date."
+    exit 1
+fi