How to identify if a optional attribute of resource is present in node configuration on puppet client run

[smartway]

A optional attribute of a resource defaults to a value which is not supported
on one of the platforms.
I want add a platform check to block the attribute, if the attribute is given by user throw a error.
Type file for this resource is present in other module which i cannot modify.
Is there a way to know if the attribute in present in manifest file and add a check for same in
my module.

[Henrik Lindberg]

On 2014-29-09 7:44, smartway wrote:
>
> A optional attribute of a resource defaults to a value which is not
> supported
> on one of the platforms.

If it defaults to an illegal value via the Resource Defaults mechanism,
it will be difficult to look it up.

> I want add a platform check to block the attribute, if the attribute is
> given by user throw a error.
> Type file for this resource is present in other module which i cannot
> modify.
> Is there a way to know if the attribute in present in manifest file and
> add a check for same in
> my module.
>

The order of evaluation makes this difficult. You can perhaps use a
collect expression with an override to set value to something else.
Making it fail in this case is more difficult, something crazy like
evaluating faulty overrides may work - e.g.

thetype <| theparam == unwanted_value |> {
bad_use_of_the_param => 'stop'
}

(untried, it may fail even if the query does not return any resources).

- henrik

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