FROM ruby:2.6.3-alpine AS base

ARG BUNDLE_JOBS=${nproc}
ARG BUNDLE_RETRY=5

ARG BUILD_PACKAGES="build-base git"
ARG DEV_PACKAGES="postgresql-dev yarn"
ARG RUBY_PACKAGES="tzdata"

RUN apk update && \
      apk add --no-cache $BUILD_PACKAGES $DEV_PACKAGES $RUBY_PACKAGES

RUN mkdir /app
WORKDIR /app

################################################################################
FROM base AS builder

# Copying the Gemfile separately allows the image to be cached.
# These steps are not rerun unless the Gemfile or Gemfile.lock is changed.
COPY Gemfile Gemfile.lock /app/
RUN BUNDLE_JOBS=$BUNDLE_JOBS BUNDLE_RETRY=$BUNDLE_RETRY bundle install

# Again, copy seperately so we can cache this step.
# There is no "--no-cache" option like NPM, and won't make sense to add one with
# upcoming yarn versions: https://github.com/yarnpkg/rfcs/pull/53
COPY package.json yarn.lock /app/
RUN yarn install && yarn cache clean

# Copy our app over now
COPY bin/ /app/bin
COPY Rakefile /app/
COPY .rspec .ruby-version tsconfig.json babel.config.js postcss.config.js \
  .browserslistrc .prettierrc.js .rubocop.yml .eslintrc.js /app/
COPY vendor/ /app/vendor
COPY config.ru /app/config.ru
COPY config/ /app/config
COPY config/database.yml.docker /app/config/database.yml
COPY public/ /app/public
COPY storage/ /app/storage
COPY lib/ /app/lib
COPY db/ /app/db
COPY app/ /app/app

# Compile our assets, moving unneeded directories out of way for the prod image
# after compilation has completed.
RUN rm -rf tmp/cache log && \
      mkdir -p /var/cache/app/app && \
      mv node_modules /var/cache/app

################################################################################
FROM base AS dev

COPY --from=builder /usr/local/bundle/ /usr/local/bundle/
COPY --from=builder /app/ /app/
COPY --from=builder /var/cache/app/ /app/
COPY spec/ /app/spec

# Watchman is required for relay-compiler to run in watch mode
COPY --from=icalialabs/watchman /usr/local/bin/watchman* /usr/local/bin/
RUN mkdir -p /usr/local/var/run/watchman && \
      touch /usr/local/var/run/watchman/.not-empty

################################################################################
FROM base AS prod

# FIXME: Not production ready

ENV RAILS_ENV=production

# Install only required gems for production, and remove any uneccesary build
# packages
RUN BUNDLE_JOBS=$BUNDLE_JOBS BUNDLE_RETRY=$BUNDLE_RETRY bundle install --without development test && \
      apk rm $BUILD_PACKAGES $DEV_PACKAGES

COPY --from=builder /app/ /app/

RUN rails assets:precompile && \
      rm -rf /app/app/assets && \
      rm -rf /app/app/javascript

# Run the server
EXPOSE 3000
CMD ["rails", "server", "-p", "3000"]