Issue #5517 has been updated by Luke Kanies.
It would be great to see a proposed fix that got us the appropriate behavior
here and in #4778. Something like this might work:
* Defer evaluation in both cases ('include' and parameterized classes)
* Automatically evaluate unevaluated classes that have variables mentioned
(which would fix #4778)
But I don't really know, and it would probably qualify as a big enough change
that it might have to wait for a major release.
In the meantime, I agree that this should at least throw a warning or
something; the fact that it looks like it works but then doesn't is pretty
horrible.
----------------------------------------
Bug #5517: behavior change within 2.6 makes it impossible to override class
parameters of "included" parametrized classes
https://projects.puppetlabs.com/issues/5517#change-82406
Author: Peter Meier
Status: Accepted
Priority: High
Assignee: eric sorenson
Category: language
Target version: 3.x
Affected Puppet version: 3.0.2
Keywords: parameterized_classes
Branch:
In 2.6.1 the following recipe:
<pre>
class a(
$b_c = { 'b' => 'foo' }
) {
notice $a::b_c
if $a::b_c {
notice $a::b_c['b']
}
}
class b {
class{'a': b_c => false }
}
class b::c inherits b {
Class['a']{ b_c => { 'b' => 'bleh' } }
}
class b::d {
include ::b::c
}
include b::d
</pre>
produces the following output:
<pre>
$ puppet foo.pp
notice: Scope(Class[A]): bbleh
notice: Scope(Class[A]): bleh
</pre>
Which is what I expected. However with 2.6.3 it produces the following output:
<pre>
# puppet foo.pp
notice: Scope(Class[A]): false
</pre>
Imho likely the changes for #4778 and #5074 are responsible for that behavior
change.
However this makes it impossible to overwrite parameters of a "included"
parametrized class in a subclass. There are only ugly workarounds for that
problem and I think this should actually work as it did within 2.6.1. Otherwise
the usefulness of parametrized classes is quite reduced.
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