Add hack/verify-pkg-names.sh

hack/verify-pkg-names.sh

+#!/bin/bash
+
+# Copyright 2016 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.
+
+# Verify whether codes follow golang convention.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+source "${KUBE_ROOT}/hack/lib/init.sh"
+
+kube::golang::verify_go_version
+
+cd "${KUBE_ROOT}"
+if git --no-pager grep -E $'^(import |\t)[a-z]+[A-Z_][a-zA-Z]* "[^"]+"$' -- '**/*.go' ':(exclude)vendor/*' ':(exclude)staging/*'; then
+  echo "!!! Some package aliase break go conventions."
+  echo "To fix these errors, do not use capitalizaed or underlined characters"
+  echo "in pkg aliases. Refer to https://blog.golang.org/package-names for more info."
+  exit 1
+fi