So, I dopped into the debugger with:
$x = inline_template("<%= require 'ruby-debug';debugger;puts 'foo' %>"
and realized that the value returned from the statement:
$var1_override = $override_hash['var1']
is actually nil.
So an easier version of my question is rather or not nil can be treated the
same as undefined in Puppet.
On Tue, May 1, 2012 at 9:06 PM, Dan Bode <d...@puppetlabs.com> wrote:
> Hi all,
>
> I have run into an example where Puppet behaves exactly like I hoped it
> would. I am a little concerned that it may just be a coincidence that it
> happens to work like this. My question is rather or not the following is
> specified behavior that I can take advantage of (I may take advantage of it
> anyways, the question is actually rather I should be concerned about it
> working in the future :) )
>
> My use case:
>
> Supposed I have a class that has parameters that have defaults specified:
>
> class one(
> $var1 = 'default1',
> $var2 = 'default2'
> ) {
>
> notify { $var1: }
> notify { $var2: }
> }
>
> I want to call this class from another class, and that has a class
> parameter that accepts a hash that is used to potentially override various
> parameters from class 'one'
>
> class two(
> $override_hash = {}
> ) {
>
> $var1_override = $override_hash['var1']
>
> class { 'one':
> var1 => $var1_override
> }
> }
>
> class { 'two': }
>
> I was hoping that var1 from class one would not be overridden if the key
> var1 did not exist in the hash (I was hoping that it would be equivalent to
> passing undef)
>
>
> And that is actually exactly how it worked.
>
> Is that on purpose? I did not find anything about this in the
> documentation.
>
> regards,
>
> Dan
>
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