Britney has a special case for essential packages to ensure that any
package that with essential packages are not installable. This check
did not account for a case, where a package is not co-installable with
two or more pseudo-essential package part of the same OR dependency.
A contrived example based on real world data:
Package: foo
# Conflict with all providers of "awk"
Conflicts: mawk | gawk | original-awk
This alone is actually not sufficient to trigger the bug, as
_get_min_pseudo_ess_set is in theory some times smart enough to pick
an "obvious" solution between the pseudo-essential option.
When it does, one of the above ends up in the (de-facto) essential set
and then the installability tester correctly rejects "foo".
Though, even with the fix above, the handling for this is probably not
correct if the essential set is not (fully co-)installable. However,
that basically only happens if we are bootstrapping an architecture
(or testing is royally broken, in which case this is the least of our
worries).
Signed-off-by: Niels Thykier <niels@thykier.net>
Doing this means that you can't use the hint tester for packages with
uppercase characters in the version, e.g.
Version mismatch, dreamchess 0.2.1-rc2-2build1 != 0.2.1-RC2-2build1
Closes: Debian#846141
Signed-off-by: Niels Thykier <niels@thykier.net>
This fixes commit 497edc to really allow policies to see if the excuse has
already been invalidated by previous policies.
Signed-off-by: Niels Thykier <niels@thykier.net>
Cleanly split doop_source into a (small) part about source packages
and a (longer) part about binary packages.
Signed-off-by: Niels Thykier <niels@thykier.net>
Coverage suggests that the conditions are always true. If so, we can
replace the "elif" with a regular "if" - but for now, lets keep an
assert.
Signed-off-by: Niels Thykier <niels@thykier.net>
Add a check to ensure we do not create broken test data (as happened
recently, where the architecture values were swapped for a single
binary). A cold hard failure like this is easier to debug
compared to Britney playing "garbage in, garbage out".
Signed-off-by: Niels Thykier <niels@thykier.net>
Add some "no cover" to some unrecoverable exceptions
(e.g. misconfiguration) or base-class methods that are not intended to
be invoked.
Signed-off-by: Niels Thykier <niels@thykier.net>
doop_source never (no longer?) creates an element in "virtual" where
the package name is prefixed with "-", so we can drop that branch.
Signed-off-by: Niels Thykier <niels@thykier.net>
