# syntax=docker/dockerfile:1.4
# Heavy layer: Ruby gems + system packages. Rebuild only when Gemfile.lock changes.
#   docker build -f Dockerfile.deps -t custom/dalan-deps:1 .
FROM ruby:2.7.8

ARG UID=1000
ARG GID=1000

ENV APP_HOME=/home/app \
    BUNDLE_PATH=/opt/vendor/bundle \
    TZ=UTC

RUN groupadd -r --gid ${GID} app \
 && useradd --system --create-home --home ${APP_HOME} --shell /sbin/nologin --no-log-init \
      --gid ${GID} --uid ${UID} app

WORKDIR $APP_HOME

RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
    --mount=type=cache,target=/var/lib/apt,sharing=locked \
    apt-get update \
 && apt-get install -y --no-install-recommends default-libmysqlclient-dev git curl wget \
 && rm -rf /var/lib/apt/lists/* \
 && gem install bundler:2.2.16

COPY Gemfile Gemfile.lock ./

RUN mkdir -p ${BUNDLE_PATH} \
 && chown -R app:app ${BUNDLE_PATH} ${APP_HOME} \
 && su app -s /bin/bash -c "bundle config set --local path ${BUNDLE_PATH} \
 && bundle config set --local without 'development test' \
 && bundle install --jobs $(nproc)"

USER app
ENV PATH="${BUNDLE_PATH}/bin:${PATH}"