There are a variety of other archive formats which you may encounter. Instructions for some of them are detailed below:
If a package is supplied as a .zip file, you should:
DEPEND upon app-arch/unzip
unpack as normal
If a package is supplied as a .shar file, you should repackage it locally
into a .tar.bz2. It may also be useful to ask upstream to use a friendlier
package format
—
however, if they ship .shar, chances are they haven't
done a release in at least ten years.
.rar files must be repackaged locally into a .tar.bz2 file.