I think I figured out how to solve the problem. I changed
wrapper.tt2 this way (applying this
advice):
[% IF template.naked;
content;
ELSE;
content WRAPPER site_wrapper.tt2;
END;
%]
Then, in my template:
[% META naked = 1 %]
[% WRAPPER site_wrapper.tt2 %]
+
whatever
[% END %]
[% FOREACH c IN categories %]
[% FILTER redirect("${c.name}/index.html") %]
[% PROCESS portfolio/category %]
[% END %]
[% END %]
site_wrapper.tt2, as you can guess, contains the code that was in
wrapper.tt2. In
portfolio/category:
[% WRAPPER site_wrapper.tt2 %]
it works!
[% END %]
Now I have another problem: changing
META informations in the processed template. But that's another issue.