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When auto-hinting, also try a "minimal" package set

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The minimal set is comprised of only the first level of (reverse)
dependencies, before any further iterations of packages are added to
the set.  In some cases, the result of the full iteration will contain
packages which cause problems when migrated but the minimal set,
although possibly a less optimal solution, may be able to migrate
successfully.

It is assumed that migrating the larger set of packages will be
preferred if possible, so minimal sets are tried later.

Signed-off-by: Adam D. Barratt <adam@adam-barratt.org.uk>
This commit is contained in:
Adam D. Barratt 2011-10-19 18:23:52 +00:00
parent cf080e49bd
commit dcad3f3480
1 changed files with 21 additions and 15 deletions
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36
britney.py
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@ -2593,6 +2593,7 @@ class Britney:
# loop on them
candidates = []
mincands = []
for e in excuses:
excuse = excuses[e]
if e in self.sources['testing'] and self.sources['testing'][e][VERSION] == excuse.ver[1]:
@ -2603,29 +2604,34 @@ class Britney:
candidates.append(hint.items())
else:
items = [ (e, excuse.ver[1]) ]
looped = False
for item, ver in items:
# excuses which depend on "item" or are depended on by it
items.extend( [ (x, excuses[x].ver[1]) for x in excuses if \
(item in excuses[x].deps or x in excuses[item].deps) \
and (x, excuses[x].ver[1]) not in items ] )
if not looped and len(items) > 1:
mincands.append(items[:])
looped = True
if len(items) > 1:
candidates.append(items)
to_skip = []
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:
self.do_hint("easy", "autohinter", candidates[i])
for l in [ candidates, mincands ]:
to_skip = []
for i in range(len(l)):
for j in range(i+1, len(l)):
if i in to_skip or j in to_skip:
# we already know this list isn't interesting
continue
elif frozenset(l[i]) >= frozenset(l[j]):
# j is a subset of i; ignore it
to_skip.append(j)
elif frozenset(l[i]) <= frozenset(l[j]):
# i is a subset of j; ignore it
to_skip.append(i)
for i in range(len(l)):
if i not in to_skip:
self.do_hint("easy", "autohinter", l[i])
def old_libraries(self):
"""Detect old libraries left in testing for smooth transitions