To ensure the security of your system you MUST read the source of the ebuild you are about to install. You will usually NOT need to explicitly specify this option.
But that would mean that you have an external program trying to automatically set variables within this very central configuration file.Since I consider that dangerous I prefer having a very small external file that only contains the setting for . The contents will get merged to a single list of overlays.makes it easy to retrieve and update overlays for Gentoo.In addition it makes it TRIVIAL to break your system.Thus you are removing the security shield that the standard tree provides for you.
You should keep that in mind when installing ebuilds from an overlay.
The Gentoo main tree provides you with high quality ebuilds that are all maintained by Gentoo developers.
This will not be the case for most of the overlays you can get by using .
This allows to add a personal collection of overlays that are not present in the global list.
now accepts multiple repository config file options.
Meaning that if an overlay does not support any of the specified protocols, it will not install.