Cloud Build on a Schedule, without Trigger.

scheduled-cloudbuild.sh

PROJECT_ID=myproject
gcloud scheduler jobs create http ${PROJECT_ID}-run-build \
	--schedule='1 12 * * *' \
	--uri=https://cloudbuild.googleapis.com/v1/projects/${PROJECT_ID}/builds?alt=json \
	--message-body-from-file=- \
	--oauth-service-account-email=${PROJECT_ID}@appspot.gserviceaccount.com \
	--oauth-token-scope=https://www.googleapis.com/auth/cloud-platform \
<<EOF
{ "steps": [
	{
		"id": "hello cron",
		"name": "alpine",
		"args": ["echo", "Hello schedule"]
	}]
}
EOF