What does the new config.gems get you that the old $GEM_PATH and
$GEM_HOME does not?
I just have a global gems repo, and the wider use-any-gem
functionality of vendor/gems for all gems, not just rails,
GEM_HOME to RAILS_ROOT/gems
GEM_PATH to $GEM_HOME:<the rest>
What am I missing?
%mkdir gems gems/bin
and so on. See the web page above.