presubmit.yaml (8 lines of code) (raw):
# Cloud Build YAML to run all presubmit tasks
steps:
- name: docker
script: |
set -e
# Find all directories that container a file named `Dockerfile`
for dir in $(find . -type d -exec test -e '{}'/Dockerfile \; -print); do
echo "BUILDING $dir"
docker build $dir
done