Convert Foreman YAML to Puppet hiera yaml

foreman_yaml.py

#!/usr/bin/env python

## USAGE
# ./foreman_yaml.py < myserver.foreman.yaml  > myserver.puppet.yaml

## Convert Foreman YAML:
# classes:
#   build_environment_vars:
#     env_vars: SERVER_ENVIRONMENT=development
#   build_java:
#     java_major_release: '8'
#     java_minor_release: '40'
#
## To puppet hiera yaml:
# build_environment_vars::env_vars: SERVER_ENVIRONMENT=development
# build_java::java_major_release: '8'
# build_java::java_minor_release: '40'

import sys
import yaml

doc = yaml.load(sys.stdin)
try:
    if hasattr(doc['classes'], 'items'):
        newdoc = {}
        for className, classParameters in doc['classes'].items():
            if hasattr(classParameters, 'items'):
                for parameterName, parameterValues in classParameters.items():
                    newdoc["%s::%s" % (className, parameterName)] = parameterValues
        print(yaml.dump(newdoc))
except NameError:
    print('No classes defined')