buildkite_agent_hook.sh

#!/usr/bin/env bash
# This is a BuildKite Agent hook, which gets downloaded from S3 onto the
# running machine, and is run before the start of every job in the pipeline.
# See https://buildkite.com/docs/agent/v3/hooks

set -o errexit
set -o nounset

echo "Hello! I am the agent hook downloaded from S3!"

# Log in to Docker Hub, so we can pull images from the platform ECR repos.
aws ecr get-login-password \
| docker login \
    --username AWS \
    --password-stdin 760097843905.dkr.ecr.eu-west-1.amazonaws.com

echo "These are the containers which are running, probably from a previous job:"
docker ps

echo "I'm going to stop these containers now, so this job has a clean start."
docker kill $(docker ps -q) || true

echo "How much space am I using?"
df -h

echo "Goodbye! The agent hook is finished now!"