Applying packageset exceptions transitively
laney at ubuntu.com
Fri May 15 15:58:21 UTC 2020
I've been considering one of the recent exception requests that
Sébastien made (add yaru-theme to ubuntu-desktop). The request itself is
obviously correct IMO, but after looking into it a bit I think that the
packageset maintenance scripts should handle this class of cases without
an exception. Here's what happens, using the yaru-theme example but this
will apply more generally.
yaru-theme is put into desktop-core because it is depended on by
gnome-shell-common which is itself in desktop-core, according to
germinate and AFAICS correctly.
But gnome-shell-common is built from the gnome-shell source package
which *does* have an exception to be put into ubuntu-desktop.
packageset-report should do the following
- Look at the 'why' field output by germinate
- This references a binary package. Resolve that to a source package.
This information is also in the germinate output.
- Check if the source package is the subject of an exception. If so,
apply the exception to the current package too.
I've got a branch which implements a first cut at this
I know this isn't finalised yet. It works for the yaru-theme case, but
there are also some others which are IMO still incorrect, like mozjs68.
To fix those, I need to make the above algorithm apply repeatedly so
that exceptions to entire trees of dependencies rather than just the
Attached are two files. 'changes' is a raw list of the changes that
would be executed if you run my version of packageset. 'changes-diff' is
a diff wrt. the current version of packageset, i.e. it includes the
extra changes by applying single-step dependency resolution.
Would appreciate your thoughts and ideally a green light to go ahead and
finish the branch up. (While I'm there, I would also port the scripts to
python3 but in a separate commit.)
FWIW, I think it would be an improvement if you were to commit the
results of either the current version of packageset or (preferred) my
Iain Lane [ iain at orangesquash.org.uk ]
Debian Developer [ laney at debian.org ]
Ubuntu Developer [ laney at ubuntu.com ]
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