Connector for Cloud Build

# This workflow demonstrates how to use the Cloud Build connector. # The workflow creates a simple build and the image is stored to an Artifact Registry repo. # The workflow assumes a properly defined source tgz file already # exists in a Cloud Storage bucket: gs://your-project-id_cloudbuild/source/placeholder_src.tgz # and a repository "your-project-id-docker-repo" already # exists in Artifact Registry where the image will be stored. # The new table and dataset are both deleted in the following steps. # Expected successful output: "SUCCESS" - init:  assign:  - project_id: ${sys.get_env("GOOGLE_CLOUD_PROJECT_ID")}  - location_id: "global"  - repo: ${project_id + "-docker-repo"}  - image_path: ${"us-central1-docker.pkg.dev/" + project_id + "/" + repo + "/quickstart-image:tag1"} - create_build:  call: googleapis.cloudbuild.v1.projects.builds.create  args:  projectId: ${project_id}  parent: ${"projects/" + project_id + "/locations/" + location_id}  body:  source:  storageSource:  bucket: ${project_id + "_cloudbuild"}  object: "source/placeholder_src.tgz"  steps:  - name: "gcr.io/cloud-builders/docker"  args:  - "build"  - "-t"  - ${image_path}  - "."  images:  - ${image_path} - the_end:  return: "SUCCESS"