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Move get_reverse_tree into britney_util

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Rename get_reverse_tree and move it to britney_util with slightly
different arguments.

Signed-off-by: Niels Thykier <niels@thykier.net>
This commit is contained in:
Niels Thykier 2013-01-12 16:34:02 +01:00
parent 53012ea54b
commit 1c144b3eb2
2 changed files with 50 additions and 42 deletions
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49
britney.py
View File

@ -190,7 +190,6 @@ import urllib
import apt_pkg
from functools import reduce, partial
from itertools import chain, repeat, izip
from operator import attrgetter
if __name__ == '__main__':
@ -213,7 +212,7 @@ from migrationitem import MigrationItem, HintItem
from hints import HintCollection
from britney import buildSystem
from britney_util import (old_libraries_format, same_source, undo_changes,
register_reverses)
register_reverses, compute_reverse_tree)
from consts import (VERSION, SECTION, BINARIES, MAINTAINER, FAKESRC,
SOURCE, SOURCEVER, ARCHITECTURE, DEPENDS, CONFLICTS,
PROVIDES, RDEPENDS, RCONFLICTS)
@ -1887,6 +1886,7 @@ class Britney(object):
# local copies for better performances
sources = self.sources
binaries = self.binaries['testing']
get_reverse_tree = partial(compute_reverse_tree, self.binaries["testing"])
# remove all binary packages (if the source already exists)
if item.architecture == 'source' or not item.is_removal:
if item.package in sources['testing']:
@ -1903,7 +1903,7 @@ class Britney(object):
# save the old binary for undo
undo['binaries'][p] = binaries[parch][0][binary]
# all the reverse dependencies are affected by the change
affected.update(self.get_reverse_tree(binary, parch, 'testing'))
affected.update(get_reverse_tree(binary, parch))
# remove the provided virtual packages
for j in binaries[parch][0][binary][PROVIDES]:
key = j + "/" + parch
@ -1927,7 +1927,7 @@ class Britney(object):
# updates but not supported as a manual hint
elif item.package in binaries[item.architecture][0]:
undo['binaries'][item.package + "/" + item.architecture] = binaries[item.architecture][0][item.package]
affected.update(self.get_reverse_tree(item.package, item.architecture, 'testing'))
affected.update(get_reverse_tree(item.package, item.architecture))
del binaries[item.architecture][0][item.package]
self.systems[item.architecture].remove_binary(item.package)
@ -1948,10 +1948,10 @@ class Britney(object):
# save the old binary package
undo['binaries'][p] = binaries[parch][0][binary]
# all the reverse dependencies are affected by the change
affected.update(self.get_reverse_tree(binary, parch, 'testing'))
affected.update(get_reverse_tree(binary, parch))
# all the reverse conflicts and their dependency tree are affected by the change
for j in binaries[parch][0][binary][RCONFLICTS]:
affected.update(self.get_reverse_tree(j, parch, 'testing'))
affected.update(get_reverse_tree(j, parch))
self.systems[parch].remove_binary(binary)
else:
# the binary isn't in testing, but it may have been at
@ -1969,7 +1969,7 @@ class Britney(object):
if p in tundo['binaries']:
for rdep in tundo['binaries'][p][RDEPENDS]:
if rdep in binaries[parch][0] and rdep not in source[BINARIES]:
affected.update(self.get_reverse_tree(rdep, parch, 'testing'))
affected.update(get_reverse_tree(rdep, parch))
# add/update the binary package
binaries[parch][0][binary] = self.binaries[item.suite][parch][0][binary]
self.systems[parch].add_binary(binary, binaries[parch][0][binary][:PROVIDES] + \
@ -1984,7 +1984,7 @@ class Britney(object):
undo['virtual'][key] = binaries[parch][1][j][:]
binaries[parch][1][j].append(binary)
# all the reverse dependencies are affected by the change
affected.update(self.get_reverse_tree(binary, parch, 'testing'))
affected.update(get_reverse_tree(binary, parch))
# register reverse dependencies and conflicts for the new binary packages
if item.architecture == 'source':
@ -2001,39 +2001,6 @@ class Britney(object):
# return the package name, the suite, the list of affected packages and the undo dictionary
return (item, affected, undo)
def get_reverse_tree(self, pkg, arch, suite):
"""Calculate the full dependency tree for the given package
This method returns the full dependency tree for the package
`pkg`, inside the `arch` architecture for the suite `suite`
flatterned as an iterable.
The tree is returned as an iterable of (package, arch) tuples
and the iterable will contain (`pkg`, `arch`) if it is
available on that architecture.
If `pkg` is not available on that architecture in that suite,
this returns an empty iterable.
The method does not promise any ordering of the returned
elements and the iterable is not reusable nor mutable.
"""
binaries = self.binaries[suite][arch][0]
if pkg not in binaries:
return frozenset()
rev_deps = set(binaries[pkg][RDEPENDS])
seen = set([pkg])
binfilt = ifilter_only(binaries)
revfilt = ifilter_except(seen)
flatten = chain.from_iterable
while rev_deps:
# mark all of the current iteration of packages as affected
seen |= rev_deps
# generate the next iteration, which is the reverse-dependencies of
# the current iteration
rev_deps = set(revfilt(flatten( binaries[x][RDEPENDS] for x in binfilt(rev_deps) )))
return izip(seen, repeat(arch))
def _check_packages(self, binaries, systems, arch, affected, skip_archall, nuninst, pkg):
broken = nuninst[arch + "+all"]

43
britney_util.py
View File

@ -20,7 +20,7 @@
import apt_pkg
from functools import partial
from itertools import ifilter, ifilterfalse
from itertools import chain, ifilter, ifilterfalse, izip, repeat
import re
@ -218,3 +218,44 @@ def register_reverses(packages, provides, check_doubles=True, iterator=None,
if i not in packages: continue
if not check_doubles or pkg not in packages[i][RCONFLICTS]:
packages[i][RCONFLICTS].append(pkg)
def compute_reverse_tree(packages_s, pkg, arch,
set=set, flatten=chain.from_iterable,
RDEPENDS=RDEPENDS):
"""Calculate the full dependency tree for the given package
This method returns the full dependency tree for the package
"pkg", inside the "arch" architecture for a given suite flattened
as an iterable. The first argument "packages_s" is the binary
package table for that given suite (e.g. Britney().binaries["testing"]).
The tree (or graph) is returned as an iterable of (package, arch)
tuples and the iterable will contain ("pkg", "arch") if it is
available on that architecture.
If "pkg" is not available on that architecture in that suite,
this returns an empty iterable.
The method does not promise any ordering of the returned
elements and the iterable is not reusable.
The flatten=... and the "X=X" parameters are optimizations to
avoid "load global" in the loops.
"""
binaries = packages_s[arch][0]
if pkg not in binaries:
return frozenset()
rev_deps = set(binaries[pkg][RDEPENDS])
seen = set([pkg])
binfilt = ifilter_only(binaries)
revfilt = ifilter_except(seen)
while rev_deps:
# mark all of the current iteration of packages as affected
seen |= rev_deps
# generate the next iteration, which is the reverse-dependencies of
# the current iteration
rev_deps = set(revfilt(flatten( binaries[x][RDEPENDS] for x in binfilt(rev_deps) )))
return izip(seen, repeat(arch))