Add a step to cloudbuild-nomulus CB job to create a release in Cloud Deploy (#3059)

* add step to create cd release in cb-nomulus job

* add variable for pipeline and region

* pass image with digest to release

* add source and skaffold to release command

* remove new lines from script

release/cloudbuild-nomulus.yaml

@@ -73,6 +73,7 @@ steps:
   - |
     nomulus_digest=$(gcloud container images list-tags gcr.io/${PROJECT_ID}/nomulus \
     --format="get(digest)" --filter="tags = ${TAG_NAME}")
+    echo "$nomulus_digest" > /workspace/nomulus_digest
     proxy_digest=$(gcloud container images list-tags gcr.io/${PROJECT_ID}/proxy \
     --format="get(digest)" --filter="tags = ${TAG_NAME}")
     gcloud --project=${PROJECT_ID} beta container binauthz attestations \
@@ -175,6 +176,33 @@ steps:
     cp db/build/libs/schema.jar output/
     cp core/build/libs/nomulus-public.jar output/
     cp core/build/libs/nomulus-tests-alldeps.jar output/
+# Create a release in Cloud Deploy to trigger the deployment pipeline
+- name: 'gcr.io/${PROJECT_ID}/builder:latest'
+  entrypoint: /bin/bash
+  args:
+  - -c
+  - |
+    set -e
+    echo "============================================="
+    echo "Triggering Google Cloud Deploy Release"
+    echo "============================================="
+    echo "Tag Name: ${TAG_NAME}"
+    echo "Project ID: ${PROJECT_ID}"
+    pipeline="deploy-nomulus"
+    region="us-central1"
+    # Release names must consist of lowercase letters, numbers, and hyphens.
+    release_name=$(echo "${TAG_NAME}" | tr '[:upper:]' '[:lower:]' | tr '_' '-')
+    echo "Release Name: $release_name"
+    echo "============================================="
+    # Read the pre-fetched image digest from the workspace file
+    nomulus_digest=$(cat /workspace/nomulus_digest)
+    gcloud deploy releases create "$release_name" \
+      --delivery-pipeline="$pipeline" \
+      --region="$region" \
+      --project=${PROJECT_ID} \
+      --images="nomulus=gcr.io/${PROJECT_ID}/nomulus@${nomulus_digest}" \
+      --source=. \
+      --skaffold-file=release/clouddeploy/skaffold.yaml
 # The tarballs and jars to upload to GCS.
 artifacts:
   objects: