Puppet users - Mar 2010 - Calling a function from a template

Hi,

I''m attempting to call a custom function directly from a template.
I''ve gotten as far as being able to call the function, but it
isn''t
returning the correct value.  I''ve created a simple function that just
returns the value passed to it:

echo.rb:
module Puppet::Parser::Functions
  newfunction(:echo, :type => :rvalue ) do |args|
    args[0]
  end
end

When I call this from the template like so:

template.erb
<% Puppet::Parser::Functions.autoloader.loadall %>
Function from template is: <%= scope.function_echo("temp") %>

The returned value is:

Function from template is: 116

For some unknown reason it is returning a number.  Does anyone have
any suggestions on how I might get this to work?

Thanks,

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On Fri, Mar 26, 2010 at 9:54 AM, Mike <mruncieman@gmail.com> wrote:
> Hi,
>
> I''m attempting to call a custom function directly from a template.
> I''ve gotten as far as being able to call the function, but it
isn''t
> returning the correct value.  I''ve created a simple function that
just
> returns the value passed to it:
>
> echo.rb:
> module Puppet::Parser::Functions
>  newfunction(:echo, :type => :rvalue ) do |args|
>    args[0]
>  end
> end
>
> When I call this from the template like so:
>
> template.erb
> <% Puppet::Parser::Functions.autoloader.loadall %>
> Function from template is: <%= scope.function_echo("temp")
%>
>
> The returned value is:
>
> Function from template is: 116
>


It looks like our docs/wiki doesn''t have documentation on calling
functions
from templates.    I need to fix that.

The ASCII value for ''t'' is 116, which seems to mean an array
is not being
passed for "args".

Does scope.function_echo(["temp"]) work instead?

Failing that, I would think you could also assign a variable in the manifest
and use that within your template.

Let me know what you find out.

--Michael

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On Mar 26, 10:59 am, Michael DeHaan <mich...@puppetlabs.com>
wrote:
> Does scope.function_echo(["temp"]) work instead?
That did it!  Thanks a lot!

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On Fri, Mar 26, 2010 at 11:08 AM, Mike <mruncieman@gmail.com> wrote:
>
>
> On Mar 26, 10:59 am, Michael DeHaan <mich...@puppetlabs.com> wrote:
> > Does scope.function_echo(["temp"]) work instead?
>
> That did it!  Thanks a lot!
>

Great, I''ll add some info to our docs about this.

If anyone else has suggestions on similar tricks/things that are not covered
with respect to custom functions, types/providers, etc, let me know!

--Michael

>
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>
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>
>
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