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britney2-ubuntu
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Move (and rename) try_migration to the MigrationManager

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Signed-off-by: Niels Thykier <niels@thykier.net>
ubuntu/rebased
Niels Thykier 6 years ago
parent 28c7a052fa
commit 4803065e1a
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GPG Key ID: A65B78DBE67C7AAC
2 changed files with 100 additions and 95 deletions
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93
britney.py
Unescape View File

@ -209,7 +209,7 @@ from britney2.utils import (log_and_format_old_libraries, get_dependency_solvers
format_and_log_uninst, newly_uninst, make_migrationitem,
write_excuses, write_heidi_delta, write_controlfiles,
old_libraries, is_nuninst_asgood_generous,
clone_nuninst, check_installability,
clone_nuninst,
invalidate_excuses, compile_nuninst,
find_smooth_updateable_binaries, parse_provides,
MigrationConstraintException,
@ -334,7 +334,8 @@ class Britney(object):
target_suite = self.suite_info.target_suite
target_suite.inst_tester = self._inst_tester
self._migration_manager = MigrationManager(self.options, self.suite_info, self.all_binaries, self.pkg_universe)
self._migration_manager = MigrationManager(self.options, self.suite_info, self.all_binaries, self.pkg_universe,
self.constraints)
if not self.options.nuninst_cache:
self.logger.info("Building the list of non-installable packages for the full archive")
@ -1489,89 +1490,6 @@ class Britney(object):
res.append("%s-%d" % (arch[0], n))
return "%d+%d: %s" % (total, totalbreak, ":".join(res))
def try_migration(self, actions, nuninst_now, transaction, stop_on_first_regression=True):
is_accepted = True
affected_architectures = set()
item = actions
target_suite = self.suite_info.target_suite
packages_t = target_suite.binaries
nobreakall_arches = self.options.nobreakall_arches
new_arches = self.options.new_arches
break_arches = self.options.break_arches
arch = None
mm = self._migration_manager
if len(actions) == 1:
item = actions[0]
# apply the changes
affected_direct, affected_all = mm._apply_item_to_suite(item, transaction)
if item.architecture == 'source':
affected_architectures = set(self.options.architectures)
else:
affected_architectures.add(item.architecture)
else:
removals = set()
affected_direct = set()
affected_all = set()
for item in actions:
_, rms, _ = mm._compute_groups(item, allow_smooth_updates=False)
removals.update(rms)
affected_architectures.add(item.architecture)
if 'source' in affected_architectures:
affected_architectures = set(self.options.architectures)
for item in actions:
item_affected_direct, item_affected_all = mm._apply_item_to_suite(item,
transaction,
removals=removals)
affected_direct.update(item_affected_direct)
affected_all.update(item_affected_all)
# Optimise the test if we may revert directly.
# - The automatic-revert is needed since some callers (notably via hints) may
# accept the outcome of this migration and expect nuninst to be updated.
# (e.g. "force-hint" or "hint")
if stop_on_first_regression:
affected_all -= affected_direct
else:
affected_direct = set()
# Copy nuninst_comp - we have to deep clone affected
# architectures.
# NB: We do this *after* updating testing as we have to filter out
# removed binaries. Otherwise, uninstallable binaries that were
# removed by the item would still be counted.
nuninst_after = clone_nuninst(nuninst_now, packages_s=packages_t, architectures=affected_architectures)
must_be_installable = self.constraints['keep-installable']
# check the affected packages on all the architectures
for arch in affected_architectures:
check_archall = arch in nobreakall_arches
check_installability(target_suite, packages_t, arch, affected_direct, affected_all,
check_archall, nuninst_after)
# if the uninstallability counter is worse than before, break the loop
if stop_on_first_regression:
worse = False
if len(nuninst_after[arch]) > len(nuninst_now[arch]):
worse = True
else:
regression = nuninst_after[arch] - nuninst_now[arch]
if not regression.isdisjoint(must_be_installable):
worse = True
# ... except for a few special cases
if worse and ((item.architecture != 'source' and arch not in new_arches) or
(arch not in break_arches)):
is_accepted = False
break
return (is_accepted, nuninst_after, arch)
def iter_packages(self, packages, selected, nuninst=None, parent_transaction=None, try_removals=True):
"""Iter on the list of actions and apply them one-by-one
@ -1621,7 +1539,7 @@ class Britney(object):
with start_transaction(suite_info, all_binaries, parent_transaction) as transaction:
accepted = False
try:
accepted, nuninst_after, failed_arch = self.try_migration(comp,
accepted, nuninst_after, failed_arch = mm.migrate_item_to_target_suite(comp,
nuninst_last_accepted,
transaction)
if accepted:
@ -1741,8 +1659,9 @@ class Britney(object):
transaction = None
if init:
mm = self._migration_manager
# init => a hint (e.g. "easy") - so do the hint run
(_, nuninst_end, _) = self.try_migration(selected,
(_, nuninst_end, _) = mm.migrate_item_to_target_suite(selected,
self.nuninst_orig,
transaction,
stop_on_first_regression=False)

92
britney2/migration.py
Unescape View File

@ -1,15 +1,19 @@
import apt_pkg
from britney2.utils import MigrationConstraintException, compute_reverse_tree, find_smooth_updateable_binaries
from britney2.utils import (
MigrationConstraintException, compute_reverse_tree, check_installability, clone_nuninst,
find_smooth_updateable_binaries,
)
class MigrationManager(object):
def __init__(self, options, suite_info, all_binaries, pkg_universe):
def __init__(self, options, suite_info, all_binaries, pkg_universe, constraints):
self.options = options
self.suite_info = suite_info
self.all_binaries = all_binaries
self.pkg_universe = pkg_universe
self.constraints = constraints
def _compute_groups(self,
item,
@ -160,7 +164,7 @@ class MigrationManager(object):
return (adds, rms, smoothbins)
def _apply_item_to_suite(self, item, transaction, removals=frozenset()):
def _apply_item_to_target_suite(self, item, transaction, removals=frozenset()):
"""Apply a change to the target suite as requested by `item`
A transaction in which all changes will be recorded. Can be None (e.g.
@ -321,3 +325,85 @@ class MigrationManager(object):
transaction.add_undo_item(undo, updated_binaries)
# return the affected packages (direct and than all)
return (affected_direct, affected_all)
def migrate_item_to_target_suite(self, actions, nuninst_now, transaction, stop_on_first_regression=True):
is_accepted = True
affected_architectures = set()
item = actions
target_suite = self.suite_info.target_suite
packages_t = target_suite.binaries
nobreakall_arches = self.options.nobreakall_arches
new_arches = self.options.new_arches
break_arches = self.options.break_arches
arch = None
if len(actions) == 1:
item = actions[0]
# apply the changes
affected_direct, affected_all = self._apply_item_to_target_suite(item, transaction)
if item.architecture == 'source':
affected_architectures = set(self.options.architectures)
else:
affected_architectures.add(item.architecture)
else:
removals = set()
affected_direct = set()
affected_all = set()
for item in actions:
_, rms, _ = self._compute_groups(item, allow_smooth_updates=False)
removals.update(rms)
affected_architectures.add(item.architecture)
if 'source' in affected_architectures:
affected_architectures = set(self.options.architectures)
for item in actions:
item_affected_direct, item_affected_all = self._apply_item_to_target_suite(item,
transaction,
removals=removals)
affected_direct.update(item_affected_direct)
affected_all.update(item_affected_all)
# Optimise the test if we may revert directly.
# - The automatic-revert is needed since some callers (notably via hints) may
# accept the outcome of this migration and expect nuninst to be updated.
# (e.g. "force-hint" or "hint")
if stop_on_first_regression:
affected_all -= affected_direct
else:
affected_direct = set()
# Copy nuninst_comp - we have to deep clone affected
# architectures.
# NB: We do this *after* updating testing as we have to filter out
# removed binaries. Otherwise, uninstallable binaries that were
# removed by the item would still be counted.
nuninst_after = clone_nuninst(nuninst_now, packages_s=packages_t, architectures=affected_architectures)
must_be_installable = self.constraints['keep-installable']
# check the affected packages on all the architectures
for arch in affected_architectures:
check_archall = arch in nobreakall_arches
check_installability(target_suite, packages_t, arch, affected_direct, affected_all,
check_archall, nuninst_after)
# if the uninstallability counter is worse than before, break the loop
if stop_on_first_regression:
worse = False
if len(nuninst_after[arch]) > len(nuninst_now[arch]):
worse = True
else:
regression = nuninst_after[arch] - nuninst_now[arch]
if not regression.isdisjoint(must_be_installable):
worse = True
# ... except for a few special cases
if worse and ((item.architecture != 'source' and arch not in new_arches) or
(arch not in break_arches)):
is_accepted = False
break
return (is_accepted, nuninst_after, arch)

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