Gentoo overlay
It's just another layman overlay for Gentoo linux.
It may be not stable, so do not use it.
Usage
emerge --ask app-portage/layman
layman -o https://raw.githubusercontent.com/iAdanos/layman-overlay/master/overlay-adanos.xml -f -a adanos
Bonus links
Search software in overlays:
About custom overlays:
https://wiki.gentoo.org/wiki/Custom_repository https://wiki.gentoo.org/wiki/Layman https://wiki.gentoo.org/wiki/Project:Overlays
https://wiki.gentoo.org/wiki/Basic_guide_to_write_Gentoo_Ebuilds https://devmanual.gentoo.org/ebuild-writing/index.html https://devmanual.gentoo.org/general-concepts/index.html https://devmanual.gentoo.org/function-reference/index.html
http://abeni.sourceforge.net/docs/ebuild-quick-reference.html