version: '3'
services:

  # serve

  jekyll-serve:
    container_name: jekyll-serve
    image: jekyll/jekyll
    # here's why we need --host 0.0.0.0
    # https://superuser.com/questions/949428/whats-the-difference-between-127-0-0-1-and-0-0-0-0
    command: bash -c "bundle update && bundle exec jekyll serve --host 0.0.0.0 --future --draft --force_polling --livereload"
    environment:
      JEKYLL_ENV: local
    ports:
      - 4000:4000
      - 35729:35729
    volumes:
      - .:/srv/jekyll
      - .bundle:/usr/local/bundle

  # build and push to rubygems.org

  gem-push:
    container_name: jekyll-gem-push
    image: jekyll/jekyll
    command: >
      bash -c "gem build -v jekyll-theme-isabelline.gemspec \
        && GEM_VER=`ruby -e '\
          require \"rubygems\"; \
          spec = Gem::Specification::load(\"jekyll-theme-isabelline.gemspec\"); \
          puts \"#{spec.version}\"'` \
        && gem push jekyll-theme-isabelline-$${GEM_VER}.gem \
        && rm jekyll-theme-isabelline-*.gem
      "
    volumes:
      - .:/srv/jekyll
      - .bundle:/usr/local/bundle
      - ./.gem:/root/.gem

  # helpers

  jekyll:
    container_name: jekyll
    image: jekyll/jekyll
    entrypoint: jekyll
    environment:      
      JEKYLL_ENV: local
    volumes:
      - .bundle:/usr/local/bundle
      - .:/srv/jekyll

  gem:
    container_name: jekyll-gem
    image: jekyll/jekyll
    entrypoint: gem
    volumes:
      - .bundle:/usr/local/bundle
      - .:/srv/jekyll

  bundle:
    container_name: jekyll
    image: jekyll/jekyll
    entrypoint: bundle
    volumes:
      - .bundle:/usr/local/bundle
      - .:/srv/jekyll
      - ./.gem:/root/.gem