On Aug 5, 2014 6:41 PM, "Reid Vandewiele" <r...@puppetlabs.com> wrote:
> Example 1 (assuming behavior whereinmerging is OK, and that explicit
parameter specification takes precedence):
>
> apache::vhost { $servername:
> port => $port,
> ssl => $ssl,
> attribute_defaults => $extra_opts,
> }
Assuming that the semantics of 'undef' haven't changed to preclude this (I
know there are changes coming but don't quite remember what they are), an
interesting couple of cases are:
$extra_opts = { $ssl => true, ... }
apache::vhost { ...
ssl => undef,
attributes => $extra_opts,
}
And:
$extra_opts = { $ssl => undef, ... }
apache::vhost { ...
ssl => true,
attributes => $extra_opts,
}
My expectation is that in both cases 'undef' means "pretend I've said
nothing about thus attribute here" and that *true* wins in either case.
But what if what is intended is to explicitly *ignore* the setting in
$extra_opts, so that the type's default is used, as if the attribute had
been mentioned by neither the $extra_opts hash or the apache::vhost
declaration? I guess using a hash operation to copy and filter $extra_opts
would do it.
By the way (since the paint's not dry) I think just *attributes* as the
afforementioned metaparam would be best -- it clearly says what it is, is
short, and is meta-sounding enough that I would not even consider using it
"in the field" -- when developing a class, defined type, type/provider, etc.
Another alternative that occurs to me that breaks the "key => val" layout
and so is cognitively distinct is to use something like the facilities that
many modern languages have for passing hashes or arrays as arguments to
methods/functions:
apache::vhost { $title:
...
**$extra_opts
}
or:
apache::vhost { $title:
...
&$extra_opts
}
or:
apache::vhost { $tilte:
...
*$extra_opts
}
--
You received this message because you are subscribed to the Google Groups
"Puppet Developers" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to puppet-dev+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/puppet-dev/CAMmm3r557mJAxXT0m3vXv6T9OMfQCwK9npkdnT7Ro7ttkGtgUA%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.
