The following tags are not parsed: * Upstream bug tracker * Upstream changelog * Upstream documentation * Upstream maintainers https://devmanual.gentoo.org/ebuild-writing/misc-files/metadata/index.html
I suggest copying pkgcraft's API (with Upstream object) https://pkgcraft.github.io/pkgcraft-python/pkgcraft.pkg.html#module-pkgcraft.pkg.ebuild