require "pathname"
ports = Pathname.glob("ports/archivers/*/").map { |i| i.basename.to_s }

ports.first do |port|
  puts file = File.read("ports/archivers/#{ port }/pkg/DESCR")
  puts "ports/archivers/#{ port }/pkg/DESCR"
  puts "hellooo?"
  File.exist? "ports/archivers/#{ port }/pkg/DESCR" 
end
=> "arc"

File.exist? "ports/archivers/arc/pkg/DESCR" 
=> true