For standard run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:joeyli:branches:devel:openSUSE:Factory/standard/home:joeyli:branches:devel:openSUSE:Factory.repo
zypper refresh
zypper install shim
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:joeyli:branches:devel:openSUSE:Factory/openSUSE_Factory_ARM/home:joeyli:branches:devel:openSUSE:Factory.repo
zypper refresh
zypper install shim
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:joeyli:branches:devel:openSUSE:Factory/16.0/home:joeyli:branches:devel:openSUSE:Factory.repo
zypper refresh
zypper install shim
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:joeyli:branches:devel:openSUSE:Factory/15.6/home:joeyli:branches:devel:openSUSE:Factory.repo
zypper refresh
zypper install shim