%import re
%def repository_identification(%%repository)

%set %%repository_re = re.compile(r'^((deb)|(deb-src)) (\[ .* \] )?(((http)|(https)|(ftp)|(ftps))://(?P<url>\S+)) (?P<suite>(\S+))(?P<components>(( \S+)+)?)')
%set %%elements = %%repository_re.match(%%repository).groupdict()
%return 'o={},a={},c={}'.format(%%elements['url'].split('/')[0], %%elements['suite'], %%elements['components'].strip())
  %return %%repository
%end def

%set %%repositories_detail = {'name': r.additional_repository_name, 'source': r.additional_repository_source, 'priority': 500, 'execptions': [] for r in %%getVar('additional_repository_name')}
%for %%priority_target in %%getVar('additional_repository_priority_target', [])
 %if %%priority_target.additional_priority_target in %%repositories_detail
  %silent %%repositories_detail[%%priority_target.additional_repository_priority_target]['priority'] = %%priority_target.additional_repository_global_priority
  %silent %%repositories_detail[%%priority_target.additional_repository_priority_target]['exceptions'] = %%priority_target.additional_repository_exempted_packages.split()
 %end if
%end for


%for %%repository in %%repositories_detail
Package: *
Pin: release %%repository_identification(%%repository['source'])
Pin-Priority: %%repository['priority']

 %for %%exception in %%repositories_detail[%%repository]['exceptions']
Package: %%exception
Pin: release %%repository_identification(%%repository['source'])
Pin-Priority: 500
 %end for
%end for