Documentation for https://tickets.puppetlabs.com/browse/HI-118 patches

118.pp

class test (
  $override_options = undef
) {
  notice($test::override_options)
}

include test

clientcert_custom.yaml

#/home/rnelson0/.puppet/hiera/clientcert/custom.yaml
---
lookupoptions::test::override_options:
  merge: deep
test::override_options:
  port: 443

common.yaml

#/home/rnelson0/.puppet/hiera/common.yaml
---
test::override_options:
  port: 80
  bind: 127.0.0.1

hiera.yaml

---
:backends:
    - yaml
:hierarchy:
    - clientcert/%{clientcert}
    - osfamily/%{osfamily}
    - common

:yaml:
    :datadir: /home/rnelson0/.puppet/hiera
#substitute your local location

output.txt

# With hiera_advanced_parameter_bindings disabled (default value)
[rnelson0@build02 puppet:ticket/master/HI-118-auto-merge-lookup±]$ bundle exec puppet config print hiera_advanced_parameter_bindings
false
[rnelson0@build02 puppet:ticket/master/HI-118-auto-merge-lookup±]$ bundle exec puppet apply ~/118.pp
Notice: Scope(Class[Test]): {port => 80, bind => 127.0.0.1}
Notice: Compiled catalog for build02.nelson.va in environment production in 0.08 seconds
Notice: Applied catalog in 0.04 seconds
[rnelson0@build02 puppet:ticket/master/HI-118-auto-merge-lookup±]$ bundle exec puppet apply ~/118.pp --certname=custom
Notice: Scope(Class[Test]): {port => 443}
Notice: Compiled catalog for custom in environment production in 0.10 seconds
Notice: Applied catalog in 0.02 seconds

# With hiera_advanced_parameter_bindings enabled through custom config file.
[rnelson0@build02 puppet:ticket/master/HI-118-auto-merge-lookup±]$ bundle exec puppet config print hiera_advanced_parameter_bindings --confdir ~/.puppet
true
[rnelson0@build02 puppet:ticket/master/HI-118-auto-merge-lookup±]$ bundle exec puppet apply ~/118.pp --confdir ~/.puppet
Notice: Scope(Class[Test]): {port => 80, bind => 127.0.0.1}
Notice: Compiled catalog for build02.nelson.va in environment production in 0.09 seconds
Notice: Applied catalog in 0.05 seconds
[rnelson0@build02 puppet:ticket/master/HI-118-auto-merge-lookup±]$ bundle exec puppet apply ~/118.pp --certname=custom --confdir ~/.puppet
Notice: Scope(Class[Test]): {port => 443, bind => 127.0.0.1}
Notice: Compiled catalog for custom in environment production in 0.08 seconds
Notice: Applied catalog in 0.02 seconds

puppet.conf

[main]
hiera_advanced_parameter_bindings = true