Use go modules in cloud builder.

build/cloudbuild.sh

@@ -1,27 +1,22 @@
 #!/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 -e
 set -x
 
-# Google Container Builder automatically checks out all the code under the /workspace directory,
-# but we actually want it to under the correct expected package in the GOPATH (/go)
-# - Create the directory to host the code that matches the expected GOPATH package locations
-# - Use /go as the default GOPATH because this is what the image uses
-# - Link our current directory (containing the source code) to the package location in the GOPATH
+# Google Container Builder automatically checks
+# out all the code under the /workspace directory,
+# but we actually want it to under the correct
+# expected package in the GOPATH (/go)
+#
+# - Create the directory to host the code that
+#   matches the expected GOPATH package locations
+#
+# - Use /go as the default GOPATH because this is
+#   what the image uses
+#
+# - Link our current directory (containing the
+#   source code) to the package location in the
+#   GOPATH
 
 OWNER="sigs.k8s.io"
 REPO="kustomize"
@@ -37,13 +32,14 @@ ln -sf $(pwd) $GO_PKG_PATH
 cd $GO_PKG_PATH
 
 
-# NOTE: if snapshot is enabled, release is not published to GitHub and the build
-# is available under workspace/dist directory.
+# If snapshot is enabled, release is not published
+# to GitHub and the build is available under
+# workspace/dist directory.
+
 SNAPSHOT=""
 
 # parse commandline args copied from the link below
 # https://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa
-
 while [[ $# -gt 0 ]]
 do
 key="$1"
@@ -56,4 +52,8 @@ case $key in
 esac
 done
 
-/goreleaser release --config=build/goreleaser.yaml --rm-dist --skip-validate ${SNAPSHOT}
+/goreleaser \
+  release \
+  --config=build/goreleaser.yaml \
+  --rm-dist \
+  --skip-validate ${SNAPSHOT}