Install goreleaser into go 1.18 image for build

releasing/cloudbuild.sh

@@ -9,27 +9,41 @@
 #
 # To test it locally, run it in a goreleaser container:
 #
-#   # Get goreleaser image from cloudbuild.yaml
-#   export GORELEASER_IMAGE=goreleaser/goreleaser:v0.179.0
+#   # Get build image from cloudbuild.yaml
+#   export GOLANG_IMAGE=golang:1.18
 #
 #   # Drop into a shell
-#   docker run -it --entrypoint=/bin/bash  -v $(pwd):/go/src/github.com/kubernetes-sigs/kustomize -w /go/src/github.com/kubernetes-sigs/kustomize $GORELEASER_IMAGE
+#   docker run -it --entrypoint=/bin/bash -v $(pwd):/go/src/github.com/kubernetes-sigs/kustomize -w /go/src/github.com/kubernetes-sigs/kustomize $GOLANG_IMAGE
 #
 #   # Run this script in the container, where $TAG is the tag to "release" (e.g. kyaml/v0.13.4)
 #   ./releasing/cloudbuild.sh $TAG --snapshot
 #
 
-set -e
-set -x
+set -o errexit
+set -o nounset
+set -o pipefail
 
+if [[ -z "${1-}" ]] ; then
+  echo "Usage: $0 <fullTag> [--snapshot]"
+  echo "Example: $0 kyaml/v0.13.4"
+  exit 1
+fi
+
+set -x
 fullTag=$1
 shift
 
 if ! command -v jq &> /dev/null
 then
-    # This assumes we are in an alpine container (which is the case for goreleaser images)
+    # This is expecting to be run from Cloud Build, in a Debian-based official golang container
     echo "Installing jq."
-    apk add jq --no-cache
+    apt-get update && apt-get install -y jq
+fi
+
+if ! command -v goreleaser &> /dev/null
+then
+    echo "Installing goreleaser."
+    make --file Makefile-tools.mk "$(go env GOPATH)/bin/goreleaser"
 fi
 
 ./releasing/run-goreleaser.sh "$fullTag" release "$@"