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Better document the new auto-hinter functionality.

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Signed-off-by: Adam D. Barratt <adam@adam-barratt.org.uk>
This commit is contained in:
Adam D. Barratt 2011-08-28 21:19:05 +00:00
parent 0b4c63a832
commit fb2279cf12
1 changed files with 14 additions and 2 deletions
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16
britney.py
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@ -2820,9 +2820,18 @@ class Britney:
self.upgrade_me = upgrade_me
def auto_hinter(self):
"""Auto hint circular dependencies
"""Auto-generate "easy" hints.
This method tries to auto hint circular dependencies analyzing the update
This method attempts to generate "easy" hints for sets of packages which
must migrate together. Beginning with a package which does not depend on
any other package (in terms of excuses), a list of dependencies and
reverse dependencies is recursively created.
Once all such lists have been generated, any which are subsets of other
lists are ignored in favour of the larger lists. The remaining lists are
then attempted in turn as "easy" hints.
We also try to auto hint circular dependencies analyzing the update
excuses relationships. If they build a circular dependency, which we already
know as not-working with the standard do_all algorithm, try to `easy` them.
"""
@ -2871,10 +2880,13 @@ class Britney:
for i in range(len(candidates)):
for j in range(i+1, len(candidates)):
if i in to_skip or j in to_skip:
# we already know this list isn't interesting
continue
elif frozenset(candidates[i]) >= frozenset(candidates[j]):
# j is a subset of i; ignore it
to_skip.append(j)
elif frozenset(candidates[i]) <= frozenset(candidates[j]):
# i is a subset of j; ignore it
to_skip.append(i)
for i in range(len(candidates)):
if i not in to_skip: