select sc.file, string_agg(s.source, ',' order by s.source) as pkglist
from newest_sources s, src_contents sc
where s.id = sc.source_id group by sc.file'''
select sc.file, string_agg(s.source, ',' order by s.source) as pkglist
from newest_sources s, src_contents sc
where s.id = sc.source_id group by sc.file'''