ubuntu/main : lp:ubuntu-release-upgrader : Git : Code : Release Upgrader

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Branch merges

4 branches proposed for merging into this one.

Branch information

Name:: ubuntu/main

Repository:: lp:ubuntu-release-upgrader

Recent commits

8e59fb1... by Nick Rosbrook on 2024-07-11

Release ubuntu-release-upgrader 1:24.10.5

ca33904... by Nick Rosbrook on 2024-07-11

Run pre-build.sh: updating mirrors, demotions, and translations.

5a45a94... by Julian Andres Klode on 2024-04-29

Reimplement obsolete removal with resolve_by_keep

Basically the idea is that we pass auto_fix=False to the cache
and then use resolve_by_keep() to revert any removals that cause
additional removals.

This is easier than it sounds however, as we need to pay special
attention to forced_obsoletes. As can be seen in the code, forced
obsoletes also remove additional dependencies (they do not check
the changes made by mark_delete() and revert it).

So we solve this with a two stage approach:

1. We mark the forced obsoletes for removal with auto_fix turned
on. This will keep the behavior for them the same. If one of
them can't be removed, we end up reverting it.

For this, we need to keep the code to create and restore the
snapshot.

2. We mark the other packages for removal without auto_fix and
then call ProblemResolver.resolve_by_keep() to fix any broken
packages by keeping them back.

This brings runtime from multiple seconds down to half a second
for a bare lxd container:

2024-04-29 10:34:35,549 DEBUG Start checking for obsolete pkgs
2024-04-29 10:34:35,912 DEBUG Finish checking for obsolete pkgs

It used to be over 11s before:

2024-04-29 10:28:59,382 DEBUG Start checking for obsolete pkgs
2024-04-29 10:29:11,855 DEBUG Finish checking for obsolete pkgs

LP: #1874272

c99e1f3... by Julian Andres Klode on 2024-04-29

Move the actiongroup out of the obsoletes loop

This improves performance as we do not need to check for autoremovable
packages after each removal.

a063051... by Nick Rosbrook on 2024-07-10

DistUpgrade: clean up backup sources

Either on abort, or on a successful upgrade, remove the backup sources
created before migrating and rewriting sources. Leaving these around
creates clutter.

Merged branch ~enr0n/ubuntu-release-upgrader:restore-migrated-sources

5664621... by Nick Rosbrook on 2024-07-10