A Puppet puzzle involving gathered resources and tags.

fun-with-tags.pp

# I was expecting this to create either /tmp/ab only, or all three files.
# Instead, it creates /tmp/a and /tmp/ab.                                                                                                      
# What's going on?                                                                                                                             

define x() {
  file { "/tmp/${name}": ensure => present }
}

@x { 'a': tag => ['a'] }
@x { 'b': tag => ['b'] }
@x { 'ab': tag => ['a', 'b'] }

X <| tag == ['a', 'b'] |>