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solver: Reduce two small loops into a comprehension

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Signed-off-by: Niels Thykier <niels@thykier.net>
This commit is contained in:
Niels Thykier 2019-01-19 18:00:59 +00:00
parent d3e06fc45f
commit 16dc303190
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1 changed files with 4 additions and 9 deletions
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13
britney2/installability/solver.py
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@ -16,6 +16,7 @@
import logging
from collections import deque
from itertools import chain
from britney2.utils import (ifilter_only, iter_except)
@ -237,15 +238,9 @@ class InstallabilitySolver(object):
# that migrates based on various rules.
for (item, adds, rms) in groups:
key = str(item)
oldcons = set()
newcons = set()
for r in rms:
oldcons.update(universe.negative_dependencies_of(r))
for a in adds:
newcons.update(universe.negative_dependencies_of(a))
current = newcons & oldcons
oldcons -= current
newcons -= current
oldcons = set(chain.from_iterable(universe.negative_dependencies_of(r) for r in rms))
newcons = set(chain.from_iterable(universe.negative_dependencies_of(a) for a in adds))
oldcons -= newcons
if oldcons:
# Some of the old binaries have "conflicts" that will
# be removed.