[chef] Ohai "require_plugin" not working from ohai command line

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Say I have an Ohai plugin called lolcode.rb that has something like this:

require_plugin "linux::lolcode"

which delegates to another plugin by the same name located in the "linux"
subdirectory.

When I run chef-client using the ohai cookbook, I can see the node in Chef
Server being updated with the appropriate information from both plugins. 
However, if I run

ohai -f lolcode.rb

The "require_plugin" seems to be completely ignored.  The "linux/lolcode.rb"
plugin isn't called.  I can change the name of the directory and/or plugin to
be something completely invalid and while it doesn't fail, it doesn't work
either.


What am I doing wrong?