Quick start

1. Add repository manually

cd /etc/portage/repos.conf
sudo wget https://git.s-morozov.net/gentoo-overlays/smoverlay/raw/branch/master/Documentation/smoverlay.conf
sudo emerge --sync smoverlay

2. Add repository using eselect repository

sudo eselect repository add smoverlay git https://git.s-morozov.net/gentoo-overlays/smoverlay.git
sudo emerge --sync smoverlay

3. Add repository using layman (deprecated):

Add the following URL to your /etc/layman.cfg (or /etc/layman/layman.cfg):

https://www.s-morozov.net/overlays.xml

Example:

overlays  : http://www.gentoo.org/proj/en/overlays/repositories.xml
            https://another-repo.tld/repo.xml
            https://www.s-morozov.net/overlays.xml

Then you need to add repo by layman: layman -f && layman -a smoverlay