When you inherit from a class the class you inherit from is evaluated
first, which is why it is able to set the parameter defaults for the
"subclass".
So when those if statements in foo::params are evaluated the class foo
simply haven't been evaluated yet, so you can't reference any
variables in it. Neither class parameters or normal variables.
If you replace $foo::bar with just $bar in the if statement it should work.
On 13 August 2012 08:51, Svein <sv...@soleim.at> wrote:
> I want to have a parametrized class with lookup from params.pp but I keep
> getting into problems.
>
>
>
> init.pp:
> class foo (
> $bar = $foo::params::bar,
> $foofoo = $foo::params::foofoo
> ) inherits foo::params {
> file {'/tmp/foobar':
> content => template("foo/foobar.erb"),
> }
>
> }
> params:
> class foo::params {
> $bar = true
> if $foo::bar {
> $foobar = 'yes'
> $foofoo = 'foo'
> }
> else {
> $foobar = 'no'
> $foofoo = 'bar'
> }
> }
>
> foobar.erb:
> <% if scope.lookupvar('foo::boo') -%>
> <%= scope.lookupvar('foo::foofoo') %>
> <% end -%>
> <%= scope.lookupvar('foo::params::foobar') %>
> <%= scope.lookupvar("foo::foofoo") %>
>
> When I run puppet on the class I get:
> puppet apply --modulepath=/modules/ foo/test/init.pp
> warning: Scope(Class[Foo::Params]): Could not look up qualified variable
> 'foo::bar'; class foo has not been evaluated at
> /modules/foo/manifests/params.pp:3
> warning: Scope(Class[Foo::Params]): Could not look up qualified variable
> 'foo::bar'; class foo has not been evaluated at
> /modules/foo/manifests/params.pp:3
> notice: Finished catalog run in 0.02 seconds
>
> and the file looks like:
> /tmp/foobar:
> bar
> no
> bar
>
>
> If I use include params.pp instead of inherits puppet gives:
> puppet apply --modulepath=/modules/ foo/test/init.pp
> warning: Scope(Class[Foo]): Could not look up qualified variable
> 'foo::params::bar'; class foo::params has not been evaluated at
> /modules/foo/manifests/init.pp:2
> warning: Scope(Class[Foo]): Could not look up qualified variable
> 'foo::params::bar'; class foo::params has not been evaluated at
> /modules/foo/manifests/init.pp:2
> warning: Scope(Class[Foo]): Could not look up qualified variable
> 'foo::params::foofoo'; class foo::params has not been evaluated at
> /modules/foo/manifests/init.pp:3
> warning: Scope(Class[Foo]): Could not look up qualified variable
> 'foo::params::foofoo'; class foo::params has not been evaluated at
> /modules/foo/manifests/init.pp:3
>
> and the file looks like.
> /tmp/foobar:
> undef
> no
> undef
>
>
> What I want it to look like is of cause:
> bar
> yes
> bar
>
> --
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--
Erik Dalén
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