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try_migration: Remove implicit rollback

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The issue with an implicit rollback is that the caller has no idea
whether it should invoke rollback or not if an exception occurs.

Signed-off-by: Niels Thykier <niels@thykier.net>
This commit is contained in:
Niels Thykier 2018-12-17 18:30:10 +00:00
parent a05a249e04
commit 814926f5c3
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GPG Key ID: A65B78DBE67C7AAC
1 changed files with 5 additions and 8 deletions
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13
britney.py
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@ -1809,7 +1809,7 @@ class Britney(object):
# return the affected packages (direct and than all)
return (affected_direct, affected_all)
def try_migration(self, actions, nuninst_now, transaction, automatic_revert=True):
def try_migration(self, actions, nuninst_now, transaction, stop_on_first_regression=True):
is_accepted = True
affected_architectures = set()
item = actions
@ -1855,7 +1855,7 @@ class Britney(object):
# - 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 automatic_revert:
if stop_on_first_regression:
affected_all -= affected_direct
else:
affected_direct = set()
@ -1878,7 +1878,7 @@ class Britney(object):
check_archall, nuninst_after)
# if the uninstallability counter is worse than before, break the loop
if automatic_revert:
if stop_on_first_regression:
worse = False
if len(nuninst_after[arch]) > len(nuninst_now[arch]):
worse = True
@ -1892,10 +1892,6 @@ class Britney(object):
is_accepted = False
break
# check if the action improved the uninstallability counters
if not is_accepted and automatic_revert:
transaction.rollback()
return (is_accepted, nuninst_after, arch)
def iter_packages(self, packages, selected, nuninst=None, parent_transaction=None):
@ -1959,6 +1955,7 @@ class Britney(object):
rescheduled_packages.extend(maybe_rescheduled_packages)
maybe_rescheduled_packages.clear()
else:
transaction.rollback()
broken = sorted(b for b in nuninst_after[failed_arch]
if b not in nuninst_last_accepted[failed_arch])
compare_nuninst = None
@ -2039,7 +2036,7 @@ class Britney(object):
(_, nuninst_end, undo_list,) = self.try_migration(selected,
self.nuninst_orig,
transaction,
automatic_revert=False)
stop_on_first_regression=False)
if recurse:
# Ensure upgrade_me and selected do not overlap, if we