Comment 10 for bug 1693900

juliank, Do you mean ppa-purge should be translated to completely different programming language, and that I can not even rely on apt-get outputting something that matches '^Err[ :]' to stdout in such cases? Sounds difficult.

What do you mean by "Our results are boolean, we might not be able to really influence the exit status." I do not understand why the "results" could not be changed to be something else.

You say: "You don't want to prevent the system from being upgraded (in an update&&upgrade type scenario) just because some third party repository disappeared."
Something like
'apt-get update || [ $? -ne "$FATAL_APT_UPDATE_ERROR" ] && apt-get upgrade'
in command line would let upgrade happen even in case of partially successful update.