template of rails application that I used in some clients

template_rails.rb

gem 'active_model_serializers'
gem 'airbrake'

gem_group :development do
  gem 'rubocop', '~> 1.30', require: false
  gem 'brakeman', require: false
  gem 'rubocop-rspec', '~> 2.11', require: false
  gem 'rubocop-rails', require: false
end

gem_group :development, :test do
  gem "dotenv-rails"
  gem "factory_bot_rails"
  gem "rspec-rails"
end

application do
  <<~CONFIG
  config.tag_version = File.readlines(File.join(Rails.root, 'version')).join.chop
  
  config.i18n.default_locale = :"en-US"
  CONFIG
end

empty_directory ".github/workflows"
empty_directory "docker"

file 'version'
file 'CHANGELOG.md'

copy_file "config/environments/production.rb", "config/environments/staging.rb"
gsub_file 'config/environments/staging.rb', /(config.consider_all_requests_local)\s+= false/, '\1 = true'
gsub_file 'config/environments/staging.rb', /(config.log_level)\s+= :info/, '\1 = :warn'

file ".github/workflows/github-actions.yml", URI.open("https://raw.githubusercontent.com/template_path/github-actions.yml", http_basic_authentication: [ENV["GITHUB_OAUTH_TOKEN"]]).read
gsub_file '.github/workflows/github-actions.yml', /<PROJECT>/, app_name.dasherize.upcase


# `DATA.read` does not work with template scripts
data_files = URI.open(__FILE__).read.split(/__END__\n/, 3).last

data_files.split(/@@(\.?.+)\n/)[1..-1].each_slice(2).each do |file_name, content|
  file file_name, ERB.new(content).result
end

after_bundle do
  generate("rspec:install")
  generate(:airbrake)
  run "rubocop -A"

  git :init
  git add: "."
  git commit: %Q{ -m 'Initial commit' }
end

__END__
@@.github/pull_request_template.md
**Motivation:**
...

**Solution:**
...


@@docker/dev/Dockerfile
FROM ruby:<%= RUBY_VERSION %>-alpine

SHELL ["/bin/ash", "-eo", "pipefail", "-c"]

RUN apk update \
  && apk --no-cache add \
             --update \
             build-base \
             freetds-dev \
             tzdata \
             git \
             linux-headers \
             shared-mime-info \
             curl \
             coreutils \
             libcrypto1.1 \
             libssl1.1 \
             bash


ENV BUNDLE_WITHOUT='development:test:debug' \
    BUNDLE_GITHUB__COM=x-access-token:${GITHUB_OAUTH_TOKEN} \
    BUNDLE_PATH=/bundle \
    BUNDLE_BIN=/bundle/bin \
    GEM_HOME=/bundle

ENV PATH="${BUNDLE_BIN}:${PATH}"

RUN mkdir $BUNDLE_PATH && \
    adduser -D app && \
    chown -R app $BUNDLE_PATH

USER app

WORKDIR /usr/src/app

COPY --chown=app . ./

RUN gem install bundler --no-document && \
    bundle install --jobs=3 --retry=3

ARG SOURCE_TAG
RUN echo ${SOURCE_TAG} > ./version

EXPOSE 3000

HEALTHCHECK --interval=5m --timeout=10s \
  CMD curl -f http://localhost:3000/healthcheck || exit 1

CMD ["bundle", "exec", "puma", "-C", "./config/puma.rb"]

@@docker-compose.yml
services:
  app:
    build:
      context: .
      args:
        GITHUB_OAUTH_TOKEN: ${GITHUB_OAUTH_TOKEN}
    command: 'bundle exec rails s -p 3000 -b 0.0.0.0'
    ports:
      - 3000:3000
    volumes:
      - .:/usr/src/app

@@.rubocop.yml
require:
  - rubocop-rails
  - rubocop-rspec

AllCops:
  Exclude:
    - 'db/**/*'
    - 'config/**/*'
    - 'script/**/*'
    - 'bin/*'
    - 'vendor/**/*'
Bundler/OrderedGems:
  Enabled: false
Layout/ExtraSpacing:
  Enabled: false
Layout/SpaceInsidePercentLiteralDelimiters:
  Enabled: false
StringLiterals:
  Enabled: false
Style/BlockComments:
  Enabled: false
Style/Documentation:
  Enabled: false
Style/SymbolArray:
  Enabled: false
Rails/FilePath:
  Enabled: false
Naming/RescuedExceptionsVariableName:
  Enabled: false
Style/PreferredHashMethods:
  Enabled: false
Style/NumericPredicate:
  Enabled: false
Style/HashSyntax:
  EnforcedShorthandSyntax: either
RSpec/NestedGroups:
  Max: 4
Layout/ClosingParenthesisIndentation:
  Enabled: false
Layout/EndAlignment:
  Enabled: false
Layout/ArgumentAlignment:
  Enabled: false
Layout/ElseAlignment:
  Enabled: false
RSpec/ExampleLength:
  CountAsOne: ['array', 'heredoc', 'hash']
Layout/IndentationWidth:
  Enabled: false
RSpec/NamedSubject:
  Enabled: false
Metrics/MethodLength:
  CountAsOne: ['array', 'heredoc', 'hash']
RSpec/StubbedMock:
  Enabled: false
RSpec/AnyInstance:
  Enabled: false
Metrics/ClassLength:
  CountAsOne: ['array', 'heredoc', 'hash']
Rails/DynamicFindBy:
  Enabled: false