:)
Say, in Ruby: p = lambda {|q| puts '\\printbibliography{'.concat(Dir::glob(q.concat('*.bib')).map!{|x| x[0..-5]}.join(",")).concat('}')}; p.call('../Sandbox/')
gives me \printbibliography{../Sandbox/mybiblio,../Sandbox/test196,../Sandbox/mybiblio2}
. :)
— Paulo Cereda 30 secs ago