Example of Puppet Collector to avoid using Stages for prep of Yum repo

gistfile1.pp

# Example of using Collector to avoid having to do 
# clever things with Puppet Stages.

yumrepo { 'epel':
  ...
}

# For all Package resources in the catalog, append 
# the EPEL repo to the require metaparameter thus 
# ensuring that the EPEL yumrepo has been configured 
# before we install any packages via the yum provider.  
Package <||> { require +> Yumrepo['epel'],}