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inst-builder: Split relation loop and optimize conflicts

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Signed-off-by: Niels Thykier <niels@thykier.net>
This commit is contained in:
Niels Thykier 2018-08-12 12:25:20 +00:00
parent 6a3d100b92
commit 6f97e36477
1 changed files with 46 additions and 46 deletions
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92
britney2/installability/builder.py
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@ -50,55 +50,55 @@ def build_installability_tester(suite_info, archs):
with builder.relation_builder(pkg_id) as relations:
for (al, dep) in [(depends, True), (conflicts, False)]:
# Breaks/Conflicts are so simple that we do not need to keep align the relation
# with the suite. This enables us to do a few optimizations.
if conflicts:
for dep_suite in suite_info:
dep_binaries_s_a, dep_provides_s_a = dep_suite.binaries[arch]
for block in (relation for relation in conflicts):
# if a package satisfies its own conflicts relation, then it is using §7.6.2
rels = (s.pkg_id for s in solvers(block, dep_binaries_s_a, dep_provides_s_a)
if s.pkg_id != pkg_id)
for r in rels:
relations.add_breaks(r)
for block in al:
sat = set()
for block in depends:
sat = set()
for dep_suite in suite_info:
dep_binaries_s_a, dep_provides_s_a = dep_suite.binaries[arch]
pkgs = solvers(block, dep_binaries_s_a, dep_provides_s_a)
for pdata in pkgs:
dep_pkg_id = pdata.pkg_id
if dep:
sat.add(dep_pkg_id)
elif pkg_id != dep_pkg_id:
# if t satisfies its own
# conflicts relation, then it
# is using §7.6.2
relations.add_breaks(dep_pkg_id)
if dep:
if len(block) != 1:
relations.add_dependency_clause(sat)
else:
# This dependency might be a part
# of a version-range a la:
#
# Depends: pkg-a (>= 1),
# pkg-a (<< 2~)
#
# In such a case we want to reduce
# that to a single clause for
# efficiency.
#
# In theory, it could also happen
# with "non-minimal" dependencies
# a la:
#
# Depends: pkg-a, pkg-a (>= 1)
#
# But dpkg is known to fix that up
# at build time, so we will
# probably only see "ranges" here.
key = block[0][0]
if key in possible_dep_ranges:
possible_dep_ranges[key] &= sat
else:
possible_dep_ranges[key] = sat
for dep_suite in suite_info:
dep_binaries_s_a, dep_provides_s_a = dep_suite.binaries[arch]
sat.update(s.pkg_id for s in solvers(block, dep_binaries_s_a, dep_provides_s_a))
if dep:
for clause in possible_dep_ranges.values():
relations.add_dependency_clause(clause)
if len(block) != 1:
relations.add_dependency_clause(sat)
else:
# This dependency might be a part
# of a version-range a la:
#
# Depends: pkg-a (>= 1),
# pkg-a (<< 2~)
#
# In such a case we want to reduce
# that to a single clause for
# efficiency.
#
# In theory, it could also happen
# with "non-minimal" dependencies
# a la:
#
# Depends: pkg-a, pkg-a (>= 1)
#
# But dpkg is known to fix that up
# at build time, so we will
# probably only see "ranges" here.
key = block[0][0]
if key in possible_dep_ranges:
possible_dep_ranges[key] &= sat
else:
possible_dep_ranges[key] = sat
for clause in possible_dep_ranges.values():
relations.add_dependency_clause(clause)
return builder.build()