Puppet users - Nov 2012 - How do you call a custom function from another module?

I have a utils module that contains common utilities. Most are defined 
types.

However, I''ve just added the first custom function in 
utils/lib/puppet/parser/functions/basename.rb .

It seems this cannot be referenced in the intuitive fashion from another 
module, namely:

  utils::basename(args)

Is it possible to call a custom function from another module? If so, what 
is the syntax? If not, is there a workaround besides copying the custom 
function to the referencing module?

Sincere thanks,

David

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Ah, I''ve got it: simply include the module then call the function 
unqualified:

include utils
# ...
basename(args)


David


On Thursday, November 29, 2012 11:37:01 AM UTC, KomodoDave
wrote:
>
> I have a utils module that contains common utilities. Most are defined 
> types.
>
> However, I''ve just added the first custom function in 
> utils/lib/puppet/parser/functions/basename.rb .
>
> It seems this cannot be referenced in the intuitive fashion from another 
> module, namely:
>
>   utils::basename(args)
>
> Is it possible to call a custom function from another module? If so, what 
> is the syntax? If not, is there a workaround besides copying the custom 
> function to the referencing module?
>
> Sincere thanks,
>
> David
>
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Hmm.. actually there''s still something amiss.

Doing the include as described above changed the error from:

Error 400 on SERVER: Unknown function utils::basename


to:

Error 400 on SERVER: Function ''basename'' does not return a
value


..which made me think it was now being found.

I then fixed the bug by adding to basename definition the required :type => 
:rvalue .

However, instead of solving the issue I now see the message:

Error 400 on SERVER: undefined method `basename''


Any suggestions would be most welcome at this point!

Thank you.

David


On Thursday, November 29, 2012 11:58:09 AM UTC, KomodoDave
wrote:
>
> Ah, I''ve got it: simply include the module then call the function 
> unqualified:
>
> include utils
> # ...
> basename(args)
>
>
> David
>
>
> On Thursday, November 29, 2012 11:37:01 AM UTC, KomodoDave wrote:
>>
>> I have a utils module that contains common utilities. Most are defined 
>> types.
>>
>> However, I''ve just added the first custom function in 
>> utils/lib/puppet/parser/functions/basename.rb .
>>
>> It seems this cannot be referenced in the intuitive fashion from
another
>> module, namely:
>>
>>   utils::basename(args)
>>
>> Is it possible to call a custom function from another module? If so,
what
>> is the syntax? If not, is there a workaround besides copying the custom
>> function to the referencing module?
>>
>> Sincere thanks,
>>
>> David
>>
>
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I fixed the problem by prefixing the one-line definition of basename with a 
return.

Should I infer Puppet doesn''t support the standard Ruby mechanism of 
returning the last evaluated result within a function?

I did have:

module Puppet::Parser::Functions
    newfunction(:basename, :type => :rvalue) do |args|
        File.basename(*args)
    end
end

..which resulted in:

err: Could not retrieve catalog from remote server: Error 400 on SERVER: 
undefined method `basename''

I now have:

module Puppet::Parser::Functions
    newfunction(:basename, :type => :rvalue) do |args|
        return File.basename(*args)
    end
end

..which works like a charm.

Cheers,

David


On Thursday, November 29, 2012 12:04:53 PM UTC, KomodoDave
wrote:
>
> Hmm.. actually there''s still something amiss.
>
> Doing the include as described above changed the error from:
>
> Error 400 on SERVER: Unknown function utils::basename
>
>
> to:
>
> Error 400 on SERVER: Function ''basename'' does not return
a value
>
>
> ..which made me think it was now being found.
>
> I then fixed the bug by adding to basename definition the required :type 
> => :rvalue .
>
> However, instead of solving the issue I now see the message:
>
> Error 400 on SERVER: undefined method `basename''
>
>
> Any suggestions would be most welcome at this point!
>
> Thank you.
>
> David
>
>
> On Thursday, November 29, 2012 11:58:09 AM UTC, KomodoDave wrote:
>>
>> Ah, I''ve got it: simply include the module then call the
function
>> unqualified:
>>
>> include utils
>> # ...
>> basename(args)
>>
>>
>> David
>>
>>
>> On Thursday, November 29, 2012 11:37:01 AM UTC, KomodoDave wrote:
>>>
>>> I have a utils module that contains common utilities. Most are
defined
>>> types.
>>>
>>> However, I''ve just added the first custom function in 
>>> utils/lib/puppet/parser/functions/basename.rb .
>>>
>>> It seems this cannot be referenced in the intuitive fashion from
another
>>> module, namely:
>>>
>>>   utils::basename(args)
>>>
>>> Is it possible to call a custom function from another module? If
so,
>>> what is the syntax? If not, is there a workaround besides copying
the
>>> custom function to the referencing module?
>>>
>>> Sincere thanks,
>>>
>>> David
>>>
>>
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