development.docker

FROM ruby:2.7.1

RUN apt-get update \
  && apt-get install -y --no-install-recommends \
    less \
  && rm -rf /var/lib/apt/lists/*

# Reasons for installing packages
# - less: better pager, for Pry in particular, but not only

RUN adduser --disabled-password --gecos '' app
USER app

RUN bundle config set jobs $(nproc --ignore=1)

# Setup the Solargraph LSP server for code autocompletion and navigation
RUN gem install solargraph && solargraph download-core
# For the "Go to definition" feature: make gems available on the host matchine
RUN bundle config set path vendor/bundle
# Allow running bundled gems executables without using `bundle exec`
ENV GEM_PATH=/usr/src/app/vendor/bundle/ruby/2.7.0:/usr/local/lib/ruby/gems/2.7.0:/usr/local/bundle
ENV PATH=./exe:/usr/src/app/vendor/bundle/ruby/2.7.0/bin:$PATH

# Allow running `exe/robot` without installing the gem
ENV RUBYLIB=/usr/src/app/lib

WORKDIR /usr/src/app

CMD ["tail", "-f", "/dev/null"]