FROM "alpine:3.8"
LABEL maintainer="Julien Cabillot <dockerimages@cabillot.eu>"

ENV NOKOGIRI_USE_SYSTEM_LIBRARIES=1

RUN apk --no-cache upgrade && \
    apk --no-cache add ruby && \
    apk --no-cache add --virtual build-dependencies \
        build-base \
        libxml2-dev \
        libxslt-dev \
        ruby-dev && \
    echo 'gem: --no-document' > /etc/gemrc && \
    gem install json foodcritic --no-rdoc --no-ri && \
    gem cleanup \
    apk del build-dependencies && \
    rm -rf /usr/lib/ruby/gems/*/cache/* \
        /var/cache/apk/* \
        /tmp/* \
        /var/tmp/*

ENTRYPOINT [ "/usr/bin/foodcritic" ]