Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:zzndb001/openSUSE_Tumbleweed/home:zzndb001.repo
zypper refresh
zypper install shfmt
Para 15.6 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:zzndb001/15.6/home:zzndb001.repo
zypper refresh
zypper install shfmt
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:zzndb001/15.5/home:zzndb001.repo
zypper refresh
zypper install shfmt
Para 15.4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:zzndb001/15.4/home:zzndb001.repo
zypper refresh
zypper install shfmt