[archlinux] apt-file equivalent

pacman and yaourt are great but…

Q: Is there an equivalent to apt-file (GNU/Debian) that allows to search for a file within packages not installed (on repositories) ?

A: pacfile

eg :
pacfile mkfs.vfat
extra/dosfstools-3.0.9-1 sbin/mkfs.vfat
extra/dosfstools-3.0.9-1 usr/share/man/man8/mkfs.vfat.8.gz