config.gem requires gem?

I have a bunch of config.gem statements in my environment.rb file:

config.gem "fastercsv", :version => "~>1.5.0"
  config.gem "parseexcel", :version => "~>0.5.2"
  config.gem "geokit", :version => "~>1.4.1"
  config.gem "facebooker", :version => "~>1.0.50"

...

If I do "rake gems:install" then I get this issue: rake aborted! no such file to load -- fastercsv

Well...i know there is no such file to load because I am trying to install it. I suspect this may result from the location of my r开发者_如何学Goequire. I have a module in my lib directory:

module SmartContactsImporter

  require 'fastercsv'
  require 'parseexcel'
...

Maybe Rails doesn't like me requiring a gem there but it seems silly since there is nothing wrong with having your module depend on a gem. Any ideas on how to solve this issue?

UPDATE Turns out that this issue also occured with mechanize, geokit, and the list is continuing. It's a bit strange that config.gem doesn't work pretty easily out of the box. FYI I'm not freezing my gems.

If you leave out the require in SmartContactsImporter this should work (config.gem "fastercsv" will do the require for you).

You can work around it when a require is needed in environment.rb with a:

begin
  require "rack/cache"
rescue LoadError
  STDERR.puts "not loaded rack/cache: #{$!}"
end

This is ugly but it does do the trick.

You shouldn't require inside your module, config.gem will require it for you.

There's also a related issue with config.gem where it will attempt to require a dependent gem that is not yet installed whilst installing the gems, but this doesn't appear to be the case yet.