Dockerfile

# Docker image for the Drone Capistrano plugin
#
#     cd $GOPATH/src/github.com/drone-plugins/drone-capistrano
#     make deps build docker

FROM ruby:2.4.1-alpine

ENV BUILD_PACKAGES="curl-dev build-base ca-certificates git openssh" \
    DEV_PACKAGES="zlib-dev libxml2-dev libxslt-dev tzdata yaml-dev sqlite-dev postgresql-dev mariadb-dev"

RUN \
  apk add --update --upgrade $BUILD_PACKAGES $DEV_PACKAGES && \
  echo 'gem: --no-document' >> /etc/gemrc && \
  chmod uog+r /etc/gemrc && \
  gem install bundler && \
  bundle config --global build.nokogiri  "--use-system-libraries" && \
  bundle config --global build.nokogumbo "--use-system-libraries" && \
  find / -type f -iname \*.apk-new -delete && \
  rm -rf /var/cache/apk/* && \
  rm -rf /usr/lib/ruby/gems/*/cache/* && \
  rm -rf /usr/local/bundle/cache/* && \
  rm -rf ~/.gem

ADD bundle.sh /
ADD drone-capistrano /bin/

ENTRYPOINT ["/bin/drone-capistrano"]