一時期は乱立したgemのgeneratorをbundle gemがほぼ統一。travisのファイルが入ってたり、Code of Conductが入ったり、rspecかminitestか選べたりといろいろ新しくなってました。
% bundle gem google-search_rank
Creating gem 'google-search_rank'...
Do you want to include a code of conduct in gems you generate?
Codes of conduct can increase contributions to your project by contributors who prefer collaborative, safe spaces. You can read more about the code of conduct at contributor-covenat.org. Having a code of conduct means agreeing to the responsibility of enforcing it, so be sure that you are prepared to do that. For suggestions about how to enforce codes of conuct, see bit.ly/coc-enforcement. y/(n): y
Do you want to license your code permissively under the MIT license?
This means that any other developer or company will be legally allowed to use your code for free as long as they admit you created it. You can read more about the MIT license at choosealicense.com/licenses/mit. y/(n): y
Do you want to generate tests with your gem?
Type 'rspec' or 'minitest' to generate those test files now and in the future. rspec/minitest/(none): minitest
create google-search_rank/Gemfile
create google-search_rank/.gitignore
create google-search_rank/lib/google/search_rank.rb
create google-search_rank/lib/google/search_rank/version.rb
create google-search_rank/google-search_rank.gemspec
create google-search_rank/Rakefile
create google-search_rank/README.md
create google-search_rank/bin/console
create google-search_rank/bin/setup
create google-search_rank/CODE_OF_CONDUCT.md
create google-search_rank/LICENSE.txt
create google-search_rank/.travis.yml
create google-search_rank/test/minitest_helper.rb
create google-search_rank/test/test_google/search_rank.rb
Initializing git repo in /Users/komagata/code/google-search_rank一回選択したら設定ファイルに書かれるみたいです。
% cat ~/.bundle/config
---
BUNDLE_GEM__COC: true
BUNDLE_GEM__MIT: true
BUNDLE_GEM__TEST: minitestもちろん僕はminitestちゃん！