def _create_rules_and_policy(self, request):
pool = self._pool
installed_repository = self._installed_repository
policy = InstalledFirstPolicy(pool, installed_repository)
assert len(request.jobs) == 1
job = request.jobs[0]
assert job.kind in (JobType.install, JobType.remove)
requirement = job.requirement
requirement_ids = [
pool.package_id(package)
for package in pool.what_provides(requirement)
]
policy.add_packages_by_id(requirement_ids)
# Add installed packages.
policy.add_packages_by_id(
[pool.package_id(package) for package in installed_repository]
)
installed_map = collections.OrderedDict()
for package in installed_repository:
installed_map[pool.package_id(package)] = package
rules_generator = RulesGenerator(pool, request, installed_map)
return list(rules_generator.iter_rules()), policy
def _create_rules_and_policy(self, request):
pool = self._pool
installed_repository = self._installed_repository
policy = InstalledFirstPolicy(pool, installed_repository)
assert len(request.jobs) == 1
job = request.jobs[0]
assert job.kind in (JobType.install, JobType.remove)
requirement = job.requirement
requirement_ids = [
pool.package_id(package)
for package in pool.what_provides(requirement)
]
policy.add_packages_by_id(requirement_ids)
# Add installed packages.
policy.add_packages_by_id(
[pool.package_id(package) for package in installed_repository])
installed_map = collections.OrderedDict()
for package in installed_repository:
installed_map[pool.package_id(package)] = package
rules_generator = RulesGenerator(pool, request, installed_map)
return list(rules_generator.iter_rules()), policy
def _create_rules_and_initialize_policy(self, request):
pool = self._pool
installed_repository = self._installed_repository
all_requirement_ids = []
soft_update_packages = set()
for job in request.jobs:
assert job.kind in (
JobType.install, JobType.remove, JobType.hard_update,
JobType.soft_update
), 'Unknown job kind: {}'.format(job.kind)
requirement = job.requirement
providers = tuple(pool.what_provides(
requirement, use_modifiers=False))
if len(providers) == 0:
raise NoPackageFound(requirement, str(requirement))
if job.kind == JobType.hard_update:
# An update request *must* install the latest package version
def key(package):
return (package.version, package in installed_repository)
providers = [max(providers, key=key)]
elif job.kind == JobType.soft_update:
soft_update_packages.update((pkg for pkg in providers
if pkg in installed_repository))
all_requirement_ids.extend(pool.package_id(p) for p in providers)
installed_package_ids = collections.OrderedDict()
for package in installed_repository:
package_id = pool.package_id(package)
installed_package_ids[package_id] = package
# Prefer the installed versions of all packages
policy = InstalledFirstPolicy(
pool, installed_repository,
ignore_installed_packages=soft_update_packages)
policy.add_requirements(all_requirement_ids)
rules_generator = RulesGenerator(
pool, request, installed_package_ids=installed_package_ids,
strict=self.strict)
return all_requirement_ids, list(rules_generator.iter_rules()), policy
def generate_rules_for_requirement(pool, requirement, installed_map=None):
"""Generate CNF rules for a requirement.
Parameters
----------
pool: Pool
Package constraints.
requirement: Requirement
Package to be installed.
Returns
-------
rules: list
Package rules describing the given scenario.
"""
request = Request()
request.install(requirement)
rules_generator = RulesGenerator(pool, request, installed_map)
rules = list(rules_generator.iter_rules())
return rules
def generate_rules_for_requirement(pool, requirement, installed_map=None):
"""Generate CNF rules for a requirement.
Parameters
----------
pool: Pool
Package constraints.
requirement: Requirement
Package to be installed.
Returns
-------
rules: list
Package rules describing the given scenario.
"""
request = Request()
request.install(requirement)
rules_generator = RulesGenerator(pool, request, installed_map)
rules = list(rules_generator.iter_rules())
return rules
def generate_rules_for_requirement(pool, requirement, installed_map=None):
"""Generate CNF rules for a requirement.
Parameters
----------
pool : Pool
A Pool of Repositories to use when fulfilling the requirement.
requirement : Requirement
The description of the package to be installed.
Returns
-------
rules : list
Package rules describing the given scenario.
"""
request = Request()
request.install(requirement)
rules_generator = RulesGenerator(
pool, request, installed_map=installed_map)
rules = list(rules_generator.iter_rules())
return rules
def generate_rules_for_requirement(pool, requirement, installed_map=None):
"""Generate CNF rules for a requirement.
Parameters
----------
pool : Pool
A Pool of Repositories to use when fulfilling the requirement.
requirement : Requirement
The description of the package to be installed.
Returns
-------
rules : list
Package rules describing the given scenario.
"""
request = Request()
request.install(requirement)
rules_generator = RulesGenerator(pool,
request,
installed_map=installed_map)
rules = list(rules_generator.iter_rules())
return rules
# Step 2: recurse
for dependency in best_dependencies:
solution = optimize_at_level(pool, dependency, new_rules, solution)
return solution
def optimize(pool, requirement, rules):
best_package = find_best_candidate(pool, requirement, rules)
solution = [best_package]
return optimize_at_level(pool, best_package, rules, solution)
if __name__ == '__main__':
repository = repository_from_index("full_index.json")
pool = Pool([repository])
requirement_str = "scikit_learn < 0.14"
requirement = Requirement._from_string(requirement_str)
request = Request()
request.install(requirement)
rules_generator = RulesGenerator(pool, request)
rules = list(rules_generator.iter_rules())
solution = optimize(pool, requirement, rules)
for decision in solution:
print(decision.name, str(decision.version))
# Step 2: recurse
for dependency in best_dependencies:
solution = optimize_at_level(pool, dependency, new_rules, solution)
return solution
def optimize(pool, requirement, rules):
best_package = find_best_candidate(pool, requirement, rules)
solution = [best_package]
return optimize_at_level(pool, best_package, rules, solution)
if __name__ == '__main__':
repository = repository_from_index("full_index.json")
pool = Pool([repository])
requirement_str = "scikit_learn < 0.14"
requirement = Requirement._from_string(requirement_str)
request = Request()
request.install(requirement)
rules_generator = RulesGenerator(pool, request)
rules = list(rules_generator.iter_rules())
solution = optimize(pool, requirement, rules)
for decision in solution:
print(decision.name, str(decision.version))