Puppet Cookbook - Third Edition

Using the future parser

Puppet language is evolving at the moment; many features that are expected to be included in the next major release (4) are available if you enable the future parser.

Getting ready

• Ensure that the rgen gem is installed.
• Set parser = future in the [main] section of your puppet.conf(/etc/puppet/puppet.conf for open source Puppet as root,/etc/puppetlabs/puppet/puppet.conf for Puppet Enterprise, and~/.puppet/puppet.conf for a non-root user running puppet).
• To temporarily test with the future parser, use --parser=future on the command line.

How to do it...

Many of the experimental features deal with how code is evaluated, for example, in an earlier example we compared the value of the $::facterversion fact with a number, but the value ...