docker-compose.yml

version: "3"
services:
  wca_on_rails:
    build:
      context: WcaOnRails
    ports:
      - 3000:3000
    environment:
      DATABASE_HOST: wca_db
    working_dir: /app/WcaOnRails
    volumes:
      - .:/app
      - gems_volume:/usr/local/bundle
    tty: true
    # First, install Ruby and Node dependencies
    # Next, wait for the database to be ready for queries via https://stackoverflow.com/a/53717981/2558618
    # Load the database if it does not exist yet
    # Start the server and bind to 0.0.0.0 (vs 127.0.0.1) so Docker's port mappings work correctly
    command: >
      bash -c 'bundle install && yarn install &&
      while ! mysql --host=wca_db --user=root -e "SELECT 1" >/dev/null 2>&1; do
        echo "Waiting for MySQL to be ready" && sleep 5 ;
      done &&
      echo "MySQL is ready!" &&
      if ! [[ "`mysqlshow --user=root --host=wca_db wca_development`" =~ "Tables" ]] ;
        then echo "Populating development db, this will take a while" && bin/rake db:load:development ;
      fi &&
      bin/rails server -b 0.0.0.0'
    depends_on:
      - wca_db

  wca_db:
    image: mysql:8.0
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: "true"
    command: --default-authentication-plugin=mysql_native_password
    expose:
      - "3306"
    volumes:
      - wca_db_volume:/var/lib/mysql
    # Suppress unneeded messages via https://stackoverflow.com/a/55706057/2558618
    cap_add:
      - SYS_NICE

volumes:
  wca_db_volume:
    driver: local
  gems_volume:
    driver: local