Initial commit

Dockerfile

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+FROM heroku/heroku:16-build
+MAINTAINER Jeff French <[email protected]>
+
+# 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"]

README.md

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+Heroku Rails Development with Docker
+=====================================
+
+This Docker image is intended to serve as a base for your Rails dev environment based on Heroku.
+
+
+## Example Usage
+
+### Dockerfile
+
+All you need is to use this image as your base:
+
+```dockerfile
+FROM moonswitch/heroku-rails
+```
+
+### Docker Compose
+
+Assuming you have a Rails app with the above Dockerfile in the root of the repo, you can setup a `docker-compose.yaml` file like this:
+
+```yaml
+services:
+  db:
+    image: postgres:10
+    volumes:
+      - postgresql-data:/var/lib/postgresql/data
+
+  app:
+    build: .
+    depends_on:
+      - db
+      - cache
+    volumes:
+      - ./:/app/user
+    environment:
+      DATABASE_URL: 'postgres://postgres:@db:5432/postgres'
+    ports:
+      - 3000:3000
+    command: bundle exec rails server
+```
+
+Then just run `docker-compose up` and visit `http://localhost:3000` in your browser.

init.sh

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+#!/bin/bash
+
+# just keep going if we don't have anything to install
+set +e
+
+if [ ! -f /etc/profile.d/secret.sh ]; then
+  # add secret key base to init
+  echo "export SECRET_KEY_BASE=\"$(openssl rand -base64 32)\"" > /etc/profile.d/secret.sh
+  chmod +x /etc/profile.d/secret.sh
+fi
+# export secret before anything
+source /etc/profile.d/secret.sh
+
+# if any changes to Gemfile occur between runs (e.g. if you mounted the
+# host directory in the container), it will install changes before proceeding
+if [ -f $WORKDIR_PATH/Gemfile ]; then
+  bundle check || bundle install --jobs 4
+fi
+
+if [ "$RAILS_ENV" == "production" ]; then
+  bundle exec rake assets:precompile
+fi
+
+for SCRIPT in $SCRIPT_PATH/*; do
+  [ -f "$SCRIPT" ] || continue
+  set -x;
+  source $SCRIPT;
+  { set +x; } 2>/dev/null
+done
+
+set -e
+
+exec "$@"