Description:

whohas is a command line tool that allows querying several package lists
at once - currently supported are Arch, Debian, Fedora, Gentoo, Mandriva,
openSUSE, Slackware (and linuxpackages.net), Source Mage, Ubuntu, FreeBSD,
NetBSD, OpenBSD, Fink, MacPorts and Cygwin. whohas is written in Perl and was
designed to help package maintainers find ebuilds, pkgbuilds and similar
package definitions from other distributions to learn from. However, it can
also be used by normal users who want to know:

- Which distribution provides packages on which the user depends.
- What version of a given package is in use in each distribution, or in each
release of a distribution (implemented only for Debian).