0d18d39e98
switch-to-configuration.pl is currently hard-coded to assume that if a unit is in the "auto-restart" state that something has gone wrong, but this is not strictly true. For example, I run offlineimap as a oneshot service restarting itself every minute (on success). NixOS currently thinks that offlineimap has failed to start as it enters the auto-restart state, because it doesn't consider why the unit failed. This commit changes switch-to-configuration.pl to inspect the full status of a unit in auto-restart state, and now only considers it failed if the ExecMainStatus is non-zero.