MediaElch is a MediaManager for Kodi. Information about Movies, TV Shows, Concerts and Music are stored as nfo files. Fanarts are downloaded automatically from fanart.tv. Using the nfo generator, MediaElch can be used with other MediaCenters as well. https://github.com/komet/mediaelch https://www.mediaelch.de/mediaelch/ There are instructions for building on Ubuntu and openSUSE: https://mediaelch.github.io/mediaelch-doc/contributing/build/ubuntu_18_04.html https://mediaelch.github.io/mediaelch-doc/contributing/build/openSUSE_Leap_42_3.html
Please have a look at this ebuild https://gpo.zugaina.org/media-video/mediaelch https://gitlab.com/salfter/portage/tree/master/media-video/mediaelch This ebuild can certainly be improved, but is a start. It does not need eutils You can tidy it up by putting the lines in the empty skel.ebuild file. I suggest to continue the development in the overlay until a developer is found. See also https://repology.org/projects/?search=mediaelch