title: rbenv-vars - Rails app is not reading them. How do they get loaded?
body: <p>I am trying to deploy a Ruby 2.2 / Rails 4.2 application from a project I inherited, and rbenv-vars is used (along with rbenv). When I try to start the Puma service, I can tell that the rbenv variables aren't getting loaded because RAILS_ENV is not set, and database.yml doesn't read the environment and uses defaults. </p>
  
  <p>---------- UPDATE June 6 --------------</p>
  
  <pre><code>deployer@host0:~$ which rbenv
  /opt/rbenv/bin/rbenv
  deployer@host0:~$ rbenv vars
  rbenv: no such command `vars'
  deployer@host0:~$ echo $PATH
  /opt/rbenv/shims:/opt/rbenv/bin:/opt/rbenv/plugins/ruby-build/bin:/opt/rbenv/plugins/rbenv_vars/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/opt/vagrant_ruby/bin
  deployer@host0:~$ rbenv versions
    system
  * 2.2.4 (set by /opt/rbenv/version)
  deployer@host0:~$ ruby -v
  ruby 2.2.4p230 (2015-12-16 revision 53155) [x86_64-linux]
  deployer@host0:~$ gem list
  
  *** LOCAL GEMS ***
  
  bigdecimal (1.2.6)
  bundler (1.12.5)
  io-console (0.4.3)
  json (1.8.1)
  minitest (5.4.3)
  power_assert (0.2.2)
  psych (2.0.8)
  rake (10.4.2)
  rdoc (4.2.0)
  test-unit (3.0.8)
  deployer@host0:~$ which gem
  /opt/rbenv/shims/gem
  deployer@host0:~$ 
  </code></pre>
  
  <hr>
  
  <p>What do I have to do to get Ruby to load rbenv-vars to load the environment variables?</p>