[chef] Handle errors raised in ruby blocks?

[Peter Loron < >]

I have some ruby blocks in a cookbook I'm working on. What is the proper way 
to raise/handle issues when something goes wrong in one of the blocks?

For example, in one block I'm using FileUtils.copy_file to copy a large zip 
archive from a server to the node running the recipe. When the file source 
doesn't exist, the failure is silent and the recipe just keeps on trucking. 
I'm wrapping the command in a begin/rescue block and calling 
'Chef::Application.fatal!', but no dice.

Can somebody provide the clue stick?

Thanks.

-Pete