Posted about 2 years ago. Visible to the public.
Bundler: How to install version 1 instead of 2 (latest version)
When installing a gem you can use version comparators like
~>. That way it is possible to fetch the latest version of Bundler 1 with this command:
gem install bundler -v '~>1'
How to install bundler for Ruby < 2.3 is a common usecase where you might need Bundler 1.