Puppet users - Aug 2012 - Possible Bug? - Array Variable + Double Quotes

All, I am trying to have a unique type name be having 
"${username}-${dotfile}" where $dotfile is an array of filenames.
This is based on the Puppet 2.7 Cookbook to manage user dotfiles and ssh 
keys.

I opened a bug here:
http://projects.puppetlabs.com/issues/15919

I have a github gist here:
https://gist.github.com/3323851

Any insight would be greatly appreciated.

Thanks,
Ron

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On Mon, Aug 13, 2012 at 4:47 AM, Ron <ronald.valente@gmail.com>
wrote:
> All, I am trying to have a unique type name be having
> "${username}-${dotfile}" where $dotfile is an array of filenames.
> This is based on the Puppet 2.7 Cookbook to manage user dotfiles and ssh
> keys.
>
> I opened a bug here:
> http://projects.puppetlabs.com/issues/15919
>
> I have a github gist here:
> https://gist.github.com/3323851
>
> Any insight would be greatly appreciated.
Puppet notify resource converts the array to a string. It''s not that
the variable isn''t an array, but you are looking at the .to_s output.
The following example should demonstrate this better:

var = [1, 2]
notice("user-${var}")
$arr = inline_template("<%= var.inspect %>")
notice("user-${arr}")

notice: Scope(Class[main]): user-12
notice: Scope(Class[main]): user-["1", "2"]
notice: Finished catalog run in 0.04 seconds

A common misconception, but most people expect in puppet string+array
results in an array value with the string prefix every array element,
what you get is actually string + array.to_s. I haven''t seen the
cookbook recipe, but I think what you meant is something closer to
this:

https://gist.github.com/7860c7d8c157432381e3

The crazy parsejson (from stdlib) inline_template is just getting
around inline_template returning string. That should be rewritten as a
puppet function. Anyhow the manifests should give an idea what you are
trying to do.

Nan

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On Monday, August 13, 2012 1:20:27 PM UTC-5, Nan Liu
wrote:
>
>
> A common misconception, but most people expect in puppet string+array 
> results in an array value with the string prefix every array element, 
> what you get is actually string + array.to_s.

Yes, we seem to have seen a lot of that around here recently.  We also 
sometimes see the closely related mistake of using "$my_array" instead
of
simply $my_array.  I suppose it''s a sign that there is interest in 
combinatorial approaches to declaring resources.

 
> I haven''t seen the 
> cookbook recipe, but I think what you meant is something closer to 
> this: 
>
> https://gist.github.com/7860c7d8c157432381e3 
>
>
For cases such as this one, where decorated versions of the elements of a 
single array are desired, the built-in regsubst() function can do the job 
relatively easily.  Note that the result should be assigned to a new 
variable, as function return values cannot directly be used as resource 
titles.


John

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On Monday, August 13, 2012 5:14:46 PM UTC-4, jcbollinger
wrote:
>
>
>
> On Monday, August 13, 2012 1:20:27 PM UTC-5, Nan Liu wrote:
>>
>>
>> A common misconception, but most people expect in puppet string+array 
>> results in an array value with the string prefix every array element, 
>> what you get is actually string + array.to_s.
>
>
> Yes, we seem to have seen a lot of that around here recently.  We also 
> sometimes see the closely related mistake of using "$my_array"
instead of
> simply $my_array.  I suppose it''s a sign that there is interest in
> combinatorial approaches to declaring resources.
>
Yeah the reason I need the $name-$dotfile is to ensure they are unique. 
That said, without the quotes or the requirement for $name then it would 
work just fine as $dotfile.
 
>
>  
>
>> I haven''t seen the 
>> cookbook recipe, but I think what you meant is something closer to 
>> this: 
>>
>> https://gist.github.com/7860c7d8c157432381e3 
>>
>>
> For cases such as this one, where decorated versions of the elements of a 
> single array are desired, the built-in regsubst() function can do the job 
> relatively easily.  Note that the result should be assigned to a new 
> variable, as function return values cannot directly be used as resource 
> titles.
>
>
How would I go about running a substring on something without a delimeter. 
Maybe I am just missing something obvious here.
 
>
> John
>
>
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HUGE Thanks to Nan Liu!

Here is my updated gist on github. This is now working and in production.
https://gist.github.com/3323851

Best,
Ron

On Monday, August 13, 2012 5:23:17 PM UTC-4, Ron wrote:
>
>
>
> On Monday, August 13, 2012 5:14:46 PM UTC-4, jcbollinger wrote:
>>
>>
>>
>> On Monday, August 13, 2012 1:20:27 PM UTC-5, Nan Liu wrote:
>>>
>>>
>>> A common misconception, but most people expect in puppet
string+array
>>> results in an array value with the string prefix every array
element,
>>> what you get is actually string + array.to_s.
>>
>>
>> Yes, we seem to have seen a lot of that around here recently.  We also 
>> sometimes see the closely related mistake of using
"$my_array" instead of
>> simply $my_array.  I suppose it''s a sign that there is
interest in
>> combinatorial approaches to declaring resources.
>>
>
> Yeah the reason I need the $name-$dotfile is to ensure they are unique. 
> That said, without the quotes or the requirement for $name then it would 
> work just fine as $dotfile.
>  
>
>>
>>  
>>
>>> I haven''t seen the 
>>> cookbook recipe, but I think what you meant is something closer to 
>>> this: 
>>>
>>> https://gist.github.com/7860c7d8c157432381e3 
>>>
>>>
>> For cases such as this one, where decorated versions of the elements of
a
>> single array are desired, the built-in regsubst() function can do the
job
>> relatively easily.  Note that the result should be assigned to a new 
>> variable, as function return values cannot directly be used as resource
>> titles.
>>
>>
> How would I go about running a substring on something without a delimeter. 
> Maybe I am just missing something obvious here.
>  
>
>>
>> John
>>
>>
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On Mon, Aug 13, 2012 at 2:44 PM, Ron <ronald.valente@gmail.com>
wrote:
> HUGE Thanks to Nan Liu!
>
> Here is my updated gist on github. This is now working and in production.
> https://gist.github.com/3323851
Whoops, please don''t abuse inline_template despite my terrible example.

John, thanks for the suggestion. The regsubst solution should work
something like:

$uname = ''jcb''
$var = [''a'', ''b'', ''c-d'']
$exp = regsubst($var, ''^(.+)$'',
"/home/${uname}/\\0", ''G'')
notice($exp)

Thanks,

Nan

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