Initialize rails dev env using docker-compose

rails-docker-compose-init.sh

# USAGE
# ------
#
# Please ensure  there is that global_bundle volume before execute this script.
#
# ```
# docker volume create global_bundle --driver local
# bash rails-docker-compose-init.sh
# docker-compose run web rails new --database postgresql --skip-bundle --force .
# # edit your Gemfile and config/database.yml (host, username, password)
# docker-compose run web bundle install
# docker-compose run web rake db:create
# docker-compose run web rails webpacker:install
# docker-compose up -d
# ```

___APPNAME___=$(basename $(pwd))
___RUBY_VER___=2.6.5
___RAILS_VER___=6.0.0
___PSQL_VER___=12.0

docker volume inspect global_bundle > /dev/null
if [ $? -ne 0 ]; then
    echo 'This script needs global_bundle volume.'
    echo 'Please execute below.'
    echo 'docker volume create global_bundle --driver local'
    exit 1
fi


cat <<EOS > Gemfile
source 'https://rubygems.org'
ruby '${___RUBY_VER___}'
gem 'rails', '~> ${___RAILS_VER___}'
EOS

touch Gemfile.lock

cat <<EOS > Dockerfile
FROM ruby:${___RUBY_VER___}

RUN apt-get update -qq && \\
    apt-get install -y \\
                    build-essential \\
                    postgresql-client \\
                    nodejs \\
                    npm
RUN npm install -g yarn

ENV APPROOT /${___APPNAME___}
RUN mkdir -p \${APPROOT}
WORKDIR \${APPROOT}

COPY Gemfile \${APPROOT}/
COPY Gemfile.lock \${APPROOT}/

RUN bundle install
COPY . \${APPROOT}/

COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]

EXPOSE 3000
CMD ["rails", "server", "-b", "0.0.0.0"]
EOS

cat <<EOS > docker-compose.yaml
version: '3'
services:
  db:
    image: postgres:${___PSQL_VER___}
    ports:
      - 5432:5432
    volumes:
      - db:/var/lib/postgresql/data
      - ./postgres/init:/docker-entrypoint-initdb.d
    environment:
      POSTGRES_USER: ${___APPNAME___}
      POSTGRES_PASSWORD: password
      POSTGRES_INITDB_ARGS: "--encoding=UTF-8"
    hostname: postgres
    restart: always
    user: root
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - .:/${___APPNAME___}
      - global_bundle:/usr/local/bundle
      - /${___APPNAME___}/log
      - /${___APPNAME___}/tmp
    ports:
      - "3000:3000"
    depends_on:
      - db
volumes:
  db:
    driver: local
  global_bundle:
    external: true
EOS

cat <<EOS > entrypoint.sh
#!/bin/bash
set -e

# Remove a potentially pre-existing server.pid for Rails.
rm -f /${___APPNAME___}/tmp/pids/server.pid

# Then exec the container's main process (what's set as CMD in the Dockerfile).
exec "\$@"
EOS

mkdir -p postgres/init
cat <<EOS > postgres/init/init-development.sql
CREATE USER ${___APPNAME___} PASSWORD 'password';
CREATE DATABASE ${___APPNAME___}_development;
CREATE DATABASE ${___APPNAME___}_test;
GRANT ALL PRIVILEGES ON DATABASE ${___APPNAME___}* TO ${___APPNAME___};
EOS

echo 'Please run following:'
echo 'docker-compose run web rails new --database postgresql --skip-bundle --force .'
echo '# edit your Gemfile and config/database.yml (host, username, password)'
echo 'docker-compose run web bundle install'
echo 'docker-compose run web rake db:create'
echo 'docker-compose run web rails webpacker:install'
echo 'docker-compose up -d'