Add bindata verify check and fix missing bindata changes (#2208)

Add script to verify if bindata is up to date.
Add changes in https://github.com/kubernetes/ingress-nginx/pull/2205 to bindata and reformat bindata file to the format that go-bindata generated.

.travis.yml

@@ -40,6 +40,7 @@ jobs:
     - sudo luarocks install luacheck
     - make luacheck
     - go get github.com/golang/lint/golint
+    - go get -u github.com/jteeuwen/go-bindata/...
     - make verify-all
   - stage: Coverage
     before_script:

Makefile

@@ -135,7 +135,7 @@ clean:
 
 .PHONE: code-generator
 code-generator:
-		go-bindata -o internal/file/bindata.go -prefix="rootfs" -pkg=file -ignore=Dockerfile -ignore=".DS_Store" rootfs/...
+		go-bindata -nometadata -o internal/file/bindata.go -prefix="rootfs" -pkg=file -ignore=Dockerfile -ignore=".DS_Store" rootfs/...
 
 .PHONY: build
 build: clean

hack/verify-bindata.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Copyright 2018 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+TMP_DIR="_tmp"
+
+cleanup() {
+  rm -rf "${TMP_DIR}"
+}
+trap "cleanup" EXIT SIGINT
+
+cleanup
+
+go-bindata -nometadata -o ${TMP_DIR}/bindata.go -prefix="rootfs" -pkg=file -ignore=Dockerfile -ignore=".DS_Store" rootfs/...
+
+ret=0
+diff -Naupr "${TMP_DIR}/bindata.go" "internal/file/bindata.go" || ret=$?
+if [[ ${ret} -eq 0 ]]
+then
+  echo "bindata.go up to date."
+else
+  echo "bindata.go is out of date. Please run make code-generator and NOT gofmt internal/file/bindata.go"
+  exit 1
+fi