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Add comment to clarify smooth update code

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This commit is contained in:
Ivo De Decker 2019-09-04 21:49:22 +00:00
parent c08ea9d33c
commit 301298e8c4
1 changed files with 9 additions and 0 deletions
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britney2/utils.py
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@ -754,6 +754,15 @@ def find_smooth_updateable_binaries(binaries_to_check,
combined = set(smoothbins)
combined.add(pkg_id)
for rdep in rdeps:
# each dependency clause has a set of possible
# alternatives that can satisfy that dependency.
# if any of them is outside the set of smoothbins, the
# dependency can be satisfied even if this binary was
# removed, so there is no need to keep it around for a
# smooth update
# if not, only this binary can satisfy the dependency, so
# we should keep it around until the rdep is no longer in
# testing
for dep_clause in pkg_universe.dependencies_of(rdep):
# filter out cruft binaries from unstable, because
# they will not be added to the set of packages that