Jira (HI-494) Interpolation of the empty variable %{} has changed

[Rob Nelson (JIRA)]

Title: Message Title

Rob Nelson created an issue   Hiera / HI-494 Interpolation of the empty variable %{} has changed Issue Type: Bug Assignee: Unassigned Created: 2016/01/20 1:09 PM Priority: Normal Reporter: Rob Nelson (Note: the errant periods after %{} are to deal with Jira's formatting and are not actually there) Sometime between Puppet 3.8.x/Hiera 1.3.x and Puppet 4.3.x/Hiera 3.x, the interpolation result changed for the empty variable %{}. Where previously, it would interpolate as an empty string, useful to help prevent interpolation of a variable when generating hiera.yaml or other similar files, it now results in the scope array. Some examples, from https://github.com/hunner/puppet-hiera/issues/108: Example 1: Returns the scope array and due to context, it provides the object name. # puppet.yaml snippet hiera::datadir: '/etc/puppetlabs/code/environments/%%{}{environment}/hiera'   # Results in puppet3/hiera1 :yaml: :datadir: /etc/puppetlabs/code/environments/%{environment}/hiera   # Results in pupppet4/hiera3 :yaml: :datadir: /etc/puppetlabs/code/environments/%#<Hiera::Scope:0x17a1410d>{environment}/hiera Example 2: Results in the scope array being enumerated at the CLI. root@ip-172-30-2-36:~# cat /etc/puppetlabs/code/environments/production/hieradata/common.yaml | grep -i iptest iptest: 'testing "% % {} {::environment}": %%{}{::environment}' iptest2: 'testing "% % {::} {::environment}": %%{::}{::environment}'   root@ip-172-30-2-36:~# hiera iptest ::environment=production ::somevar=foo ::someother=bar testing "% % {} {::environment}": %{"::environment"=>"production", "::somevar"=>"foo", "::someother"=>"bar"}{::environment}   root@ip-172-30-2-36:~# hiera iptest2 ::environment=production ::somevar=foo ::someother=bar testing "% % {::} {::environment}": %{::environment} It is interesting that %{::}. now translates as the empty string, so at least there is a workaround in place. This looks like a regression from here. Is this a bug or a feature, given that %{}. wasn't necessarily supposed to be used to help prevent interpolation anyway? Add Comment   This message was sent by Atlassian JIRA (v6.4.12#64027-sha1:e3691cc) -- You received this message because you are subscribed to the Google Groups "Puppet Bugs" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-bugs+unsubscr...@googlegroups.com. To post to this group, send email to puppet-bugs@googlegroups.com. Visit this group at https://groups.google.com/group/puppet-bugs. For more options, visit https://groups.google.com/d/optout.