On Thursday, July 5, 2012 2:59:07 PM UTC-5, fpee wrote:
>
> On 07/05/2012 08:30 AM, jcbollinger wrote:
>
> > If that's so then you are relying on a Puppet bug, or perhaps you have
> > oversimplified your example. The language guide specifically states
> > that the += operator affects the observed value of the affected variable
> > only in the scope where the plussignment is performed. You definitely
> > should not see the modified value in classes that are not declared in
> > the scope of the plussignment.
>
> Cool! Let's find out. Here is a working tiny example:
>
> node my_standard {
> $pkg_list += 'one two three '
> }
>
> node 'testnode' inherits my_standard {
> include my_test1
> include my_test2
> }
>
> class my_test1 {
> $pkg_list += 'four five '
> notify {"pkg_list=$pkg_list":}
> notice("pkg_list=$pkg_list")
> }
>
> class my_test2 {
> $pkg_list += 'six seven '
> notify {"pkg_list=$pkg_list":}
> notice("pkg_list=$pkg_list")
> }
>
> The output when run on testnode:
>
> notice: /Stage[main]/My_test1/Notify[pkg_list=one two three four five
> ]/message: defined 'message' as 'pkg_list=one two three four five '
>
> notice: /Stage[main]/My_test2/Notify[pkg_list=one two three four five
> six seven ]/message: defined 'message' as 'pkg_list=one two three four
> five six seven '
>
> So, the my_test2 scope does have the changes from the my_test1 scope.
> Using puppet-server 2.7.9-1 (epel version).
>
> As the guy who has many modules that use this bug, I like it's
> functionality :)
>
> Should I file a bug report?
>
Not if you like the buggy behavior :-)
Personally, I would be very concerned that it might stop working between
one point release and another, with no warning. The behavior is not merely
undocumented, but *contrary* to the documentation as far as I can tell.
At this point, however, I'm hoping that one of the PuppetLabs guys will
jump in to either explain why I'm wrong or confirm that it's a bug.
John
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