This isn't directly related to #8010, but rather indirectly fills the
need to allow the end user to configure where data values are looked up.
This allows the namespace to be passed as a class parameter. A module
may then quickly and easily look up data from the user-defined
namespace.
This function aborts catalog compilation if any of the passed
values are not true or false. Note, this catches the string
values of true and false correct and will abort catalog
compilation if they are not boolean values.
Paired-with: Dan Bode <dan@puppetlabs.com>
While developing Puppet Modules with class parameters, data from the
user should be validated as per the Style Guide. Puppet should fail
early and hard in the situation of invalid data being passed into the
module.
This function provides a more concise method to the alternative of using
if statements in the Puppet manifests.
