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Hi
I'm currently working on an own terminus for the catalog. One of the
ideas of this terminus is, that it can ask a configurable invalidator,
whether a certain catalog is still valid or not.
This invalidator should also be configurable in an own
terminus-dedicated config file and also deliverable by puppet modules.
So to load that invalidator I'm currently doing:
- ---
def invalidator
@invalidator ||= begin
name = config['invalidator']
Puppet::Util::Autoload.new(self, \
'puppet/cm_guard').load(name)
const_name = Puppet::Indirector::Terminus.name2const(name)
klass = "Puppet::CmGuard::#{const_name}"
constantize(klass).new
end
end
# TODO: there is for sure some internal puppet code that does that
# for me
def constantize(camel_cased_word)
names = camel_cased_word.split('::')
names.shift if names.empty? || names.first.empty?
constant = Object
names.each do |name|
constant = constant.const_defined?(name) ? \
constant.const_get(name) : constant.const_missing(name)
end
constant
end
- ---
I think I did the right thing by using Puppet::Util::Autoload to load
the file and make it possible that it is also distributable via module
lib dirs.
However as you see on my TODO: I'm not really happy how I get the
class instance from my config string. constantize is just copied over
from activesupport.
Is there an easier way to do that in puppet, similar to how I can do
it in rails? Aka. some_string.constantize
Thanks
~pete
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