docker-compose.yml

services:
  runner:
    build:
      context: .
    platform: linux/amd64
    env_file: .env
    restart: unless-stopped

    # SIGTERM has to reach entrypoint.sh's trap AND let an in-flight job finish
    # before the runner deregisters. Docker's default 10s grace period would
    # SIGKILL mid-job and leave a stale "offline" runner in GitHub.
    stop_grace_period: 2m

    # Named volumes, not bind mounts: Gradle's cache is hundreds of thousands of
    # small files, and on macOS a bind mount routes every one of those through
    # virtiofs. Named volumes stay inside the VM and are markedly faster.
    # Inspect with `docker compose exec runner du -sh /cache/gradle`, reset with
    # `docker volume rm github-runner_gradle-cache`.
    volumes:
      - gradle-cache:/cache/gradle
      - toolcache:/opt/hostedtoolcache
      - work:/_work

volumes:
  gradle-cache:
  toolcache:
  work: