Please add skip_if_unavailable support to repo files

[cryptomilk]

Hi,

yum has a features so you can set skip_if_unavailable = true for repositories which are e.g. inside of a VPN and you don't always have access to it.

Thanks for considering.

[ElScotto]

Given the issues that the Balena Etcher project have had with Cloudsmith periodically blocking downloads from the apt and yum/dnf repositories due to periodic bandwidth overuse, adding skip_if_unavailable support to zypper for SUSE distros is definitely warranted.
It's a real pain when the failure of an RPM or DEB repository/PPA causes an entire "update" or "check-update" run to fail.
Having the package manager be able to automatically "step around" failed or otherwise unavailable package repositories is a good thing as it will at least allow the system administrators to apply available, applicable updates (including security updates) rather than missing them entirely.

[mlandres]

zypper does a kind of skip_if_unavailable as default (for legacy reasons). A repo failing to be auto-refreshed does not stop the action. You just get 106 - ZYPPER_EXIT_INF_REPOS_SKIPPED if otherwise 0 had been returned.