Since advancemame, advancecomp and advancemenu are already on portage, I think an advancescan ebuild should be created. In fact, mamory, the only rom manager for linux that worked well, seems to be abandoned, and this is the only replacement I've seen. From the homepage: "AdvanceSCAN is a command line rom manager for MAME, MESS, AdvanceMAME, AdvanceMESS and Raine. The main features are : * Directly read, write zip archives without decompressing and recompressing them for the best performance. * Add, copy, move and rename files in the zip archives. Any rom that you have is placed automatically in the correct zip. * Recognize the text files added by rom sites and delete them. * Recognize the text files added by the rom dumpers and keep or delete them. * It's safe. On all the zip operations any file removed or overwritten is saved in the `rom_unknown' `sample_unknown' directories and kept for future uses. This will prevent any unwanted remove operation. * Generate differential rom sets."
Forgot to close this when I added games-emulation/advancescan on 03/25. Thanks for the bug report.