On Fri, Aug 19, 2022 at 09:01:22AM +0800, Paul Wise wrote: > Before we consider enabling this by default, first we need a way for > `apt changelog` to download the full changelog rather than loading the > changelog from /usr/share/doc in the currently installed package. You can tell apt to ignore the local changelogs completely with: Acquire::Changelogs::AlwaysOnline "true"; This is set by default on ubuntu-vendor apts, not sure why as for a repository identifying as "Origin: Ubuntu" apt knows that it should grab the online changelog, regardless of the vendor apt is built for (Acquire::Changelogs::AlwaysOnline::Origin::Ubuntu). That is an all or nothing setting through as Ubuntu does trimming unconditionally for all their packages. I don't see a logic¹ that would be able to detect "builds with dh >= 14 (and hasn't opted out)" given only binary package metadata, but I guess for most needless downloads are not much of a concern. ¹ I guess we could implement looking at the free-form text in trimmed changelogs, but that feels a bit brittle. If the last line of the changelog doesn't start with " -- " … except that this isn't always the case as e.g. shown by dpkg. As previously said, another problem is that not all repositories have online changelogs – and most tools building repositories have no option for it –, but a dh change either effects them all or we get into the problem of wanting to know if a package will end up in a repository which has them or not while building (build-profile?). Also note that e.g. d-security has no online changelogs as far as apt is concerned as they are not to be found on metadata.f-m.d.o (#490848). The tracker uses a different URI which seemingly has them (and other files for download apt doesn't know/offer), but I have no idea who maintains that, if it should be used by others and the URI scheme is slightly different (it doesn't contain the component the package belongs to) so apt can't be told to use it anyway. (And IF apt should use it, it should be told via the Release files, which only stable does currently, stable-updates and stable-security rely on apts built-in fallback which is sad) Best regards David Kalnischkies P.S.: As I was quoted already, as a side note: I am not against nor in favour of trimming; I am just pointing out potential problems and sometimes even their solutions as far as apt is concerned.
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