I have not tried with the creates param, but if its undef ( I.e. no one
have set it) you can use it directly

exec { "drush-${title}" :

      command => "drush ${command} ${root_option} ${uri_option}
${force_option} ${additional_options}",

      path    => [ '/bin', '/usr/bin' ],

      creates => $creates,

    }

If it's undef, this should work like not specifying it.

Regards,
El 29/05/2014 16:34, "Mark McFate" <summitt.dwel...@gmail.com> escribió:

> I'm probably going about this all wrong, but I have an instance where I've
> employed a Puppet module and need to *sometimes* add a "creates"
> attribute to one of the exec's defined there.  My code (below) is probably
> all wrong, but I think you'll see what I am trying to do...
>
>   if $creates != nil {
>     exec { "drush-${title}" :
>       command => "drush ${command} ${root_option} ${uri_option}
> ${force_option} ${additional_options}",
>       path    => [ '/bin', '/usr/bin' ],
>       creates => $creates,
>     }
>   } else {
>     exec { "drush-${title}" :
>       command => "drush ${command} ${root_option} ${uri_option}
> ${force_option} ${additional_options}",
>       path    => [ '/bin', '/usr/bin' ],
>     }
>   }
>
>
> This doesn't work and neither does specifying an empty or nil attribute,
> like "creates => ''" or "creates => nil".
>
> If nothing else, I will create two different exec's, one with and the
> other without a creates attribute.  Can anyone suggest a more elegant
> solution?
>
> Thanks in advance.
>
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