How to conveniently subscribe to multiple recently declared resources? - puppet

Question

How do I conveniently trigger a refresh on some resource upon a change in one of many other resources (possibly of various resource types) that were declared nearby, in puppet 4?
E.g.
# these resources
resource_type1 {...}
resource_type2 {...}
resource_type2 {...}
resource_type2 {...}
resource_type3 {...}
# should refresh this when changed
service {...}
I know I could list each resource in subscribe, and use resource collectors in it; but I'd like something more fitting for the chronically lazy.
I considered using a with block, but this doesn't work:
with() || {
# these resources
resource_type1 {...}
resource_type2 {...}
resource_type2 {...}
resource_type2 {...}
resource_type3 {...}
}
~>
# will refresh this when any of them have changed
service {...}
Only the last resource within the with block triggers a refresh.
You can test this for yourself using:
with() || {
file { '/etc/test':
content => 'Change this and notice it does not trigger',
}
file { '/etc/test2':
content => 'foo',
}
}
~>
exec {'/bin/echo triggered':
refreshonly => true,
}

Answer 1

In Puppet 4, while still leading to a good deal of boiler plate, a robust way of doing it is to use a class to group the resources:
class config {
resource_type1 {...}
resource_type2 {...}
resource_type2 {...}
resource_type2 {...}
resource_type3 {...}
}
class { 'config': }
~>
service {...}
When part of a class, you'll want to add a contain as well (here's why), like so:
class foo {
class { 'foo::config': }
~>
service {...}
contain 'foo::config'
}