Reduce a "loop over all valid items" to a "loop over an item's
dependencies + reverse dependencies". For sparse graphs, this
is much more efficient.
Signed-off-by: Niels Thykier <niels@thykier.net>
Possibly, Britney should support this somewhat more gracefully. But
start with this work around for now.
Signed-off-by: Niels Thykier <niels@thykier.net>
We do not need these in the HeidiResult file, so we might as well stop
emitting them. Note that faux packages will still appear in other
output (like the "uninst" lists/caches).
Signed-off-by: Niels Thykier <niels@thykier.net>
python-apt's "TagFile" seems to cut the field short if it meets a
comment. Therefore allow comments in the actual field value to avoid
this nasty behaviour.
Signed-off-by: Niels Thykier <niels@thykier.net>
Packages in main should not need them. Presuming we eventually make
Britney enforce separation between components, "non-free" seems like a
better default.
Signed-off-by: Niels Thykier <niels@thykier.net>
If there is a regression in "present-and-installable" constraints (on
non-break architectures), then discard the item even if the nuninst
counters have improved.
Signed-off-by: Niels Thykier <niels@thykier.net>
Replace a "if" with an unconditionally false condition with a negative
assert of the "correct" condition. The bug has been present for 2½
years with no known adverse effects.
Signed-off-by: Niels Thykier <niels@thykier.net>
For (non-hint) migrations, split the set of affected into two
parts; one for reverse dependencies and one "negative dependencies"
(e.g. Conflicts).
If there are only regressions in the nuninst after checking the first
set, then there is no reason to continue with the second set (as
"negative dependencies" can only make it worse at that point).
Signed-off-by: Niels Thykier <niels@thykier.net>
Ideally we would reject all items with known unsatisfiable
dependencies as they would not be installable in testing. However,
there are a few known corner cases where we still want to migrate them
(notably when they are already broken in testing).
This commit is an attempt to weed out some of the "obviously" broken
items that will not successfully migrate.
Signed-off-by: Niels Thykier <niels@thykier.net>
In the next commit, the binary packages will be turned into
namedtuples and will become immutable objects.
Signed-off-by: Niels Thykier <niels@thykier.net>
In an architecture only migration, we currently see two notes for
every arch:all packages:
* Ignoring "new" arch:all package
* Ignoring "removal" of arch:all package
But a closer look at the situation is that the arch:all packages is
generally the same in both testing and the source suite.
This commit removes these notes when the arch:all is the same in both
suites.
Signed-off-by: Niels Thykier <niels@thykier.net>
Niels Thykier