Mastering Puppet 5

Checking the input value with a validate block

We can validate the provided value of a new property called version with a validate block and, for example, a regex expression, as shown in the following code:

Puppet::Type.newtype(:mynewtype) do   ...   newproperty(:version) do     validate do |value|       fail("Invalid version specified") unless value =~         /^(\d+\.)?(\d+\.)?(\*|\d+)$/     end   end   ... end