variable scoping and erb templates

[Matt Zagrabelny]

Greetings!

I am hitting a curious question and couldn't find an answer.

I can access variables from other classes when using an erb template.

Here is my minimal example:

# puppet apply variable_scope_test.pp
Notice: Compiled catalog for puppet.example.com in environment
production in 0.12 seconds
Notice: A variable from a different class:
Notice: /Stage[main]/Scope_example::Sub_class/Notify[A variable from a
different class: ]/message: defined 'message' as 'A variable from a
different class: '
Notice: Finished catalog run in 0.11 seconds

# cd /tmp
# head -n -0 variable_scope_test.pp template.erb template_output
==> variable_scope_test.pp <==
class scope_example {
$variable = "THIS IS A TEST!"
include scope_example::sub_class
}

class scope_example::sub_class {
file { '/tmp/template_output':
content => template('/tmp/template.erb'),
}
notify { "A variable from a different class: $variable": }
}

node 'puppet.example.com' {
include scope_example
}

==> template.erb <==
<%= @variable %>

==> template_output <==
THIS IS A TEST!

So why is the template allowed to see variables in other classes?

I would have ad expected to need to use the variable like:

<%= @scope_example::variable %>

But it clearly works without adjusting its namespace.

Thoughts?

Thanks!

-m

[Lowe Schmidt]

What version of Puppet are you running?

--

Lowe Schmidt | +46 723 867 157

-m

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[Matt Zagrabelny]

Hi Lowe,

On Tue, Aug 16, 2016 at 1:31 AM, Lowe Schmidt <m...@loweschmidt.se> wrote:
> What version of Puppet are you running?

Debian Jessie:

3.7.2-4

-m

>> email to puppet-users...@googlegroups.com.

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>
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[jcbollinger]

On Tuesday, August 16, 2016 at 7:06:28 AM UTC-5, Matt Zagrabelny wrote:

Hi Lowe,

On Tue, Aug 16, 2016 at 1:31 AM, Lowe Schmidt <m...@loweschmidt.se> wrote:
> What version of Puppet are you running?

Debian Jessie:

3.7.2-4

That looks like bug PUP-1220.  Note that although the ticket is marked as being fixed in Puppet 3.5, commentary on the ticket and details of the associated commit make me think that the fix only applies when you use the future parser.


John

[Matt Zagrabelny]

On Tue, Aug 16, 2016 at 8:04 AM, jcbollinger <John.Bo...@stjude.org> wrote:
>>
>> On Tue, Aug 16, 2016 at 1:31 AM, Lowe Schmidt <m...@loweschmidt.se> wrote:
>> > What version of Puppet are you running?
>>
>> Debian Jessie:
>>
>> 3.7.2-4
>>
>
>
> That looks like bug PUP-1220. Note that although the ticket is marked as
> being fixed in Puppet 3.5, commentary on the ticket and details of the
> associated commit make me think that the fix only applies when you use the
> future parser.

Thanks for clearing my confusion, John!

Best,

-m

[R.I.Pienaar]

historically this is how puppet worked both in manifests and templates, that
got deprecated but for some reason templates didnt get the same treatment, 4
finished the job

>
> Best,

>
> -m
>
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