Dockerfile

FROM heroku/heroku:16-build
MAINTAINER Jeff French <jeff.french@moonswitch.com>

# Which versions?
ENV RUBY_VERSION=2.5.1 \
    BUNDLER_VERSION=1.15.2 \
    NODE_VERSION=8.10.0 \
    YARN_VERSION=1.0.2

# Setup the environment
ENV LC_ALL=en_US.UTF-8 \
    GEM_PATH=/app/heroku/ruby/bundle/ruby/$RUBY_VERSION \
    GEM_HOME=/app/heroku/ruby/bundle/ruby/$RUBY_VERSION \
    PATH=/app/heroku/ruby/ruby-$RUBY_VERSION/bin:/app/heroku/ruby/node-$NODE_VERSION/bin:/app/heroku/ruby/yarn-$YARN_VERSION/bin:/app/user/bin:/app/heroku/ruby/bundle/ruby/$RUBY_VERSION/bin:$PATH \
    BUNDLE_APP_CONFIG=/app/heroku/ruby/.bundle/config \
    WORKDIR_PATH=/app/user \
    SCRIPT_PATH=/app/profile.d

# Add the init script
COPY ./init.sh /usr/bin/init.sh

# Install all the tooling
RUN set -e ;\
    echo "Setting up directories and installing Ruby v${RUBY_VERSION}, Node v${NODE_VERSION}, Yarn v${YARN_VERSION}, and Bundler v${BUNDLER_VERSION}..." ;\
    #####
    # Setup directories
    #
    mkdir -p "${WORKDIR_PATH}" ;\
    mkdir -p "${SCRIPT_PATH}" ;\
    mkdir -p /app/heroku/ruby/bundle/ruby/$RUBY_VERSION ;\
    #####
    # Make the init script executable
    #####
    chmod +x /usr/bin/init.sh ;\
    #####
    # Install Ruby
    #####
    mkdir -p /app/heroku/ruby/ruby-$RUBY_VERSION ;\
    curl -s --retry 3 -L https://heroku-buildpack-ruby.s3.amazonaws.com/heroku-16/ruby-$RUBY_VERSION.tgz | tar xz -C /app/heroku/ruby/ruby-$RUBY_VERSION ;\
    #####
    # Install Node
    #####
    curl -s --retry 3 -L http://s3pository.heroku.com/node/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.gz | tar xz -C /app/heroku/ruby/ ;\
    mv /app/heroku/ruby/node-v$NODE_VERSION-linux-x64 /app/heroku/ruby/node-$NODE_VERSION ;\
    #####
    # Install Yarn
    #####
    curl -s --retry 3 -L https://yarnpkg.com/downloads/$YARN_VERSION/yarn-v$YARN_VERSION.tar.gz | tar xz -C /app/heroku/ruby/ ;\
    mv /app/heroku/ruby/yarn-v$YARN_VERSION /app/heroku/ruby/yarn-$YARN_VERSION ;\
    #####
    # Install Bundler
    #####
    gem install bundler -v $BUNDLER_VERSION --no-ri --no-rdoc ;\
    #####
    # export env vars during run time
    #####
    echo "cd /app/user/" > "${SCRIPT_PATH}/home.sh" ;\
    echo "export PATH=\"$PATH\" GEM_PATH=\"$GEM_PATH\" GEM_HOME=\"$GEM_HOME\" SECRET_KEY_BASE=\"$SECRET_KEY_BASE\" BUNDLE_APP_CONFIG=\"$BUNDLE_APP_CONFIG\"" > "${SCRIPT_PATH}/ruby.sh"

WORKDIR /app/user

# Run bundler to cache dependencies
ONBUILD COPY ["Gemfile", "Gemfile.lock", "${WORKDIR_PATH}/"]
ONBUILD RUN bundle install --path /app/heroku/ruby/bundle --jobs 4

# run npm or yarn install
# add yarn.lock to .slugignore in your project
ONBUILD COPY package*.json yarn.* "${WORKDIR_PATH}/"
ONBUILD RUN [ -f yarn.lock ] && yarn install --no-progress || npm install

# Add all files
ONBUILD ADD . "${WORKDIR_PATH}"

ENTRYPOINT ["/usr/bin/init.sh"]