FROM ruby:3-alpine

ARG JEKYLL_VERSION="4.3.2"

COPY patches /patches

WORKDIR /srv/jekyll

RUN apk add --no-cache --virtual=.build-dependencies g++ git make musl-dev patch \
    && echo -e 'source "https://rubygems.org"' > /Gemfile \
    && printf 'gem "jekyll", "%s"' "$JEKYLL_VERSION" >> /Gemfile \
    && cd / \
    && bundle --jobs=8 --without=development --without=test \
    && cd /usr/local/bundle/gems/jekyll-$JEKYLL_VERSION/ \
    && if [ -f /patches/${JEKYLL_VERSION}.patch ]; \
           then \
	       PATCH=$JEKYLL_VERSION; \
           else \
	       PATCH=master; \
       fi \
    && patch -s -p0 < "/patches/${PATCH}.patch" \
    && rm -rf /patches /Gemfile \
    && apk del .build-dependencies

EXPOSE 4000

VOLUME ["/srv/jekyll"]

CMD ["sh", "-c", "bundle install && jekyll serve -I --host 0.0.0.0"]