How to use script resource to substitute variable

Question

This question already has an answer here:

• How to substitute variable value in “docker run” command 1 answer

I am using chef script resource and trying to assign a fingerprint value as below

script 'retrieve_ucp_master_fingerprint' do  
  interpreter "bash"  
  code <<-EOH  
      export FINGERPRINT=D0:19:C5:80:42:66:56:AC:6F  
      docker run --rm -i -v /var/run/docker.sock:/var/run/docker.sock --name ucp docker/ucp join --replica --fingerprint $FINGERPRINT
  EOH  
end    

However, chef is not at all substituting the value of $FINGERPRINT

Answer 1

$FINGERPRINT is bash syntax, Chef is not involved. You can use #{} to interpolate Ruby expressions in some kinds of Ruby string literals, but you would have to say where that data is coming from.