David Schmitt wrote:
> Thomas Bellman wrote:
>> Haven't you just shifted around the problem? You still have an array
>> that you need to process each element of, only it is now a list of
>> keystores per key, instead of a list of keys per keystore.
>
> The actual execution is always procedural (either within a custom type
> or exec). There is no problem to iterate over all keystores _there_.
Yes, but Paul seemed to argue that having array parameters and looping over
them was "un-Puppet-like" and bad design. And then he suggested a variant
that still used array parameters. I happen to disagree with that sentiment.
If you want to use an exec to process the elements of the array, you need
to be able to pass that array to exec someway. The only way I can think
of in standard Puppet is to use inline_template() to create the command;
not exactly pretty...
Custom types are nice, but I think most Puppet users don't want to write
them, and would rather stay within the Puppet language.
That said, there is a way to loop over arrays within Puppet, and that
is by passing it as the name to a helper definition. The OP would do
something like this:
define keystore($keys, ...)
{
keystore_helper {
$keys: ...;
}
...
}
define keystore_helper(...)
{
# Each element of $keys will be available as $name here
# Do something with it here
...
}
This is not unproblematic at the moment, though. Since the name must
be unique for each keystore_helper declaration, that makes it impossible
to have more than one keystore declaration with the same keys parameter.
One would have to preprocess the $keys parameter to prepend the keystore
name to each element, and there's no way to do that in stock 0.24.8.
(I think you will be able to do it in 0.25, by abusing inline_template()
and split(), but that's rather ugly.)
/Bellman
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