Here's a hack to set the value of variables directly in a template itself.
use HTML::Template;
my $tmpl = HTML::Template->new(
scalarref => \do { local $/; <DATA> },
die_on_bad_params => 0,
loop_context_vars => 1,
filter => sub {
my $s=shift;
$$s=~s/%~([^~]+)~%/<TMPL_VAR NAME="$1">/g;
},
);
for my $key($tmpl->param) {
next unless $key =~ /^SET_VAR_([^_]+)_(.+)$/i;
$tmpl->param($1=>$2);
}
print $tmpl->output;
__DATA__
%~SET_VAR_p1_http://somelong.net/path~%
%~SET_VAR_p2_http://someother.net/otherpath~%
%~p1~%/foo.html
%~p1~%/bar.html
%~p2~%/baz.html
%~p2~%/qux.html
