Issue #20758 has been reported by James Shubin.
----------------------------------------
Feature #20758: Accessing arguments in exported resource collection override
for override.
https://projects.puppetlabs.com/issues/20758
* Author: James Shubin
* Status: Unreviewed
* Priority: Normal
* Assignee:
* Category:
* Target version:
* Affected Puppet version:
* Keywords: awesome,feature,idea
* Branch:
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Sorry I don't know how to name the subject any better...
I came up with something which would be particularly useful for advanced puppet
users, which I don't think exists at the moment. If it does, please let me
know, if not, then consider this a feature request!
Given:
<pre>
@@foo::bar { 'some_name':
value => 'hello',
thing => 'world',
tag => 'mytag',
}
</pre>
and (on a different machine):
I'd like to be able to access the properties of the element being created, for
use in it's override block...
Here is a very contrived example, I've made up a fake syntax of round brackets:
$(thing) to show where i am using a variable from the object. This could be
sort of like regexp conditional _capture_ variables, but named...
<pre>
Foo::Bar <<| tag == 'mytag' |>> {
value => "override",
thing => $(value) ? { # $(value) should be one of the
arguments
'world' => 'Earth',
'baz' => "$(name)", # here we're using the name this
define has...
'yeah' => "$(tag)", # or maybe we want a property like tag
default => "$(thing)-whatever", # here's another example, but this
time with $thing
},
}
</pre>
Please note that the syntax of $(foo) that I made up is probably the wrong
thing... It can't be ${foo} because of course you always want to be able to
still access the main scope variables named as such, so perhaps something
special is needed. Maybe $:var (single colon?) or
$::special_namespace_identifier::foo, such as $::__override::foo, or
Foo::Bar::Variable ?
Cheers,
James
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