Can I stop Bundler from adding RUBY VERSION to Gemfile.lock

Question

Every time I run any gem command on the command line, Bundler insists on touching my Gemfile.lock file to add this line:

RUBY VERSION
   ruby 2.         


        

Answer 1

No, it can't be removed, at least in the version(s) of Bundler current as I write this.

This block is added in the #to_lock method of Bundler::Definition. The only conditional it's wrapped in is if locked_ruby_version, and locked_ruby_version is a method which returns either the version defined in an existing lockfile (Gemfile.lock) or the system Ruby - Bundler tries very hard to avoid letting locked_ruby_version return a falsy value.