This module runs a Hiera server that caches Hiera data. There is a huge caveat : only the data files are watched for changes, not the main configuration file.
A minor bug is that interpolation will not work for inputs containing the % character when it isn't used for interpolation.
The only method you'll ever need. It runs a Hiera server and gives you
a querying function. The
Nil output is explicitely given as a Maybe