title: Use rvmrc or ruby-version file to set a project gemset with RVM?
body: <p>I use RVM, the <a href="https://rvm.io/">Ruby Version Manager</a> to specify a Ruby version and a set of gems for each of my Rails projects.</p>
  
  <p>I have a <code>.rvmrc</code> file to automatically select a Ruby version and gemset whenever I <code>cd</code> into a project directory.</p>
  
  <p>After installing RVM 1.19.0, I get a message</p>
  
  <blockquote>
    <p>You are using <code>.rvmrc</code>, it requires trusting, it is slower and it is
    not compatible with other ruby managers, you can switch to
    <code>.ruby-version</code> using <code>rvm rvmrc to [.]ruby-version</code> or ignore this
    warnings with <code>rvm rvmrc warning ignore
    /Users/userName/code/railsapps/rails-prelaunch-signup/.rvmrc</code>,
    <code>.rvmrc</code> will continue to be the default project file in RVM 1 and RVM
    2, to ignore the warning for all files run <code>rvm rvmrc warning ignore
    all.rvmrcs</code>.</p>
  </blockquote>
  
  <p>Should I continue using my <code>.rvmrc</code> file or should I switch to a <code>.ruby-version</code> file? Which is optimal? What are the ramifications?</p>