[galaxy-dev] Uploading and outputting multiple files

Hi List, Our tools require an array of input files and also produce an array of files. This seems as a pretty standard task, but unfortunately Galaxy doesn't support this yet. I wonder if somebody has already implemented this kind of 'file array' data type? I.e. the user selects a local directory and uploads all files as a single dataset. Even better if the user could specify a regular expression for file selection. I know that there are other options, i.e. taring the files or using composite data type, but they don't seem natural. Any hints?