I wind up using defined more than I should probably admit. yes it is
dangerous/confusing b/c of parse order dependencies, but it is also really
useful for a few use cases

* static resources in a defined resource type (avoids having to use classes
to store all static dependencies)

* the big reason I keep on leaning on it is for package dependencies. Often
something needs an additional package installed (and it is possible that
other modules may have that same package dependency, and I don't want to
have to create a new class every time that I need another package
(especially for something complicated that may have tons of package
dependencies)

puppet-apt has a relevant pull request where someone wants to wrap a
defined? around python-software-properties for this exact reason

https://github.com/puppetlabs/puppet-apt/pull/10

On Thu, Jan 19, 2012 at 9:18 AM, Nigel Kersten <ni...@puppetlabs.com> wrote:

> I'm looking for strong opinions on whether we should or shouldn't
> deprecate the defined() function for Telly, the next major Puppet release
> this year.
>
> jcbollinger put it quite well in another thread:
>
> "Use of the "defined" function introduces a parse-order dependency, and
> the additional work you need to do to ensure that that dependency is always
> fulfilled overcomes any simplicity advantage that might otherwise exist."
>
>
>
> --
> Nigel Kersten
> Product Manager, Puppet Labs
>
>
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