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britney2-ubuntu
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New algorithm for conflicts checks; improved general performances.

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bzr-import-20160707
Fabio Tranchitella 19 years ago
parent 05ac673cc0
commit 9802ae9914
1 changed files with 181 additions and 76 deletions
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221
britney.py
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@ -254,8 +254,10 @@ class Britney:
# initialize the parser
self.parser = optparse.OptionParser(version="%prog")
self.parser.add_option("-v", "", action="count", dest="verbose", help="enable verbose output")
self.parser.add_option("-c", "--config", action="store", dest="config",
default="/etc/britney.conf", help="path for the configuration file")
self.parser.add_option("-c", "--config", action="store", dest="config", default="/etc/britney.conf",
help="path for the configuration file")
self.parser.add_option("", "--arches", action="store", dest="architectures", default=None,
help="override architectures from configuration file")
(self.options, self.args) = self.parser.parse_args()
# if the configuration file exists, than read it and set the additional options
@ -273,7 +275,8 @@ class Britney:
elif k.startswith("HINTS_"):
self.HINTS[k.split("_")[1].lower()] = \
reduce(lambda x,y: x+y, [hasattr(self, "HINTS_" + i) and getattr(self, "HINTS_" + i) or (i,) for i in v.split()])
else:
elif not hasattr(self.options, k.lower()) or \
not getattr(self.options, k.lower()):
setattr(self.options, k.lower(), v)
# Sort the architecture list
@ -395,7 +398,8 @@ class Britney:
if p not in provides:
provides[p] = []
provides[p].append(pkg)
del dpkg['provides']
dpkg['provides'] = parts
else: dpkg['provides'] = []
# append the resulting dictionary to the package list
packages[pkg] = dpkg
@ -705,22 +709,25 @@ class Britney:
packages = []
# local copies for better performances
binaries = self.binaries[distribution][arch]
# for every package, version and operation in the block
for name, version, op in block:
# look for the package in unstable
if name in self.binaries[distribution][arch][0] and name not in excluded:
package = self.binaries[distribution][arch][0][name]
if name in binaries[0] and name not in excluded:
package = binaries[0][name]
# check the versioned dependency (if present)
if op == '' and version == '' or apt_pkg.CheckDep(package['version'], op, version):
packages.append(name)
# look for the package in the virtual packages list
if name in self.binaries[distribution][arch][1]:
if name in binaries[1]:
# loop on the list of packages which provides it
for prov in self.binaries[distribution][arch][1][name]:
for prov in binaries[1][name]:
if prov in excluded or \
prov not in self.binaries[distribution][arch][0]: continue
package = self.binaries[distribution][arch][0][prov]
prov not in binaries[0]: continue
package = binaries[0][prov]
# check the versioned dependency (if present)
# TODO: this is forbidden by the debian policy, which says that versioned
# dependencies on virtual packages are never satisfied. The old britney
@ -745,6 +752,10 @@ class Britney:
# retrieve the binary package from the specified suite and arch
binary_u = self.binaries[suite][arch][0][pkg]
# local copies for better performances
parse_depends = apt_pkg.ParseDepends
get_dependency_solvers = self.get_dependency_solvers
# analyze the dependency fields (if present)
for type in ('Pre-Depends', 'Depends'):
type_key = type.lower()
@ -752,15 +763,15 @@ class Britney:
continue
# for every block of dependency (which is formed as conjunction of disconjunction)
for block, block_txt in zip(apt_pkg.ParseDepends(binary_u[type_key]), binary_u[type_key].split(',')):
for block, block_txt in zip(parse_depends(binary_u[type_key]), binary_u[type_key].split(',')):
# if the block is satisfied in testing, then skip the block
solved, packages = self.get_dependency_solvers(block, arch, 'testing', excluded, strict=(excuse == None))
solved, packages = get_dependency_solvers(block, arch, 'testing', excluded, strict=(excuse == None))
if solved: continue
elif excuse == None:
return False
# check if the block can be satisfied in unstable, and list the solving packages
solved, packages = self.get_dependency_solvers(block, arch, suite)
solved, packages = get_dependency_solvers(block, arch, suite)
packages = [self.binaries[suite][arch][0][p]['source'] for p in packages]
# if the dependency can be satisfied by the same source package, skip the block:
@ -782,57 +793,138 @@ class Britney:
# if we have been called inside UpgradeRun, then check conflicts before
# saying that the package is really installable
if not excuse and conflicts:
return self.check_conflicts(pkg, arch, [], {})
return self.check_conflicts(pkg, arch, {}, {})
return True
def check_conflicts(self, pkg, arch, system, conflicts):
# if we are talking about a virtual package, skip it
if pkg not in self.binaries['testing'][arch][0]:
# local copies for better performances
binaries = self.binaries['testing'][arch]
parse_depends = apt_pkg.ParseDepends
check_depends = apt_pkg.CheckDep
# unregister conflicts
def unregister_conflicts(pkg, conflicts):
for c in conflicts.keys():
if conflicts[c][3] == pkg:
del conflicts[c]
# try to remove the offeding package
def handle_conflict(pkg, source, system, conflicts):
# reached the top of the tree
if not system[source][1]:
return False
# remove its conflicts
unregister_conflicts(source, conflicts)
# if there are alternatives, try them
alternatives = system[source][0]
for alt in alternatives:
if satisfy(alt, [x for x in alternatives if x != alt], pkg_from=system[source][1],
system=system, conflicts=conflicts, excluded=[source]):
return (system, conflicts)
# there are no alternatives, so remove the package which depends on it
return handle_conflict(pkg, system[source][1], system, conflicts)
# try to satisfy the dependency tree
def satisfy(pkg, pkg_alt=None, pkg_from=None, system=system, conflicts=conflicts, excluded=[]):
# real package
if pkg in binaries[0]:
binary_u = binaries[0][pkg]
if pkg in system:
return True
else: binary_u = None
# virtual package
providers = []
if pkg in binaries[1]:
providers = binaries[1][pkg]
if binary_u:
providers = filter(lambda x: (not pkg_alt or x not in pkg_alt) and x != pkg, providers)
if not pkg_alt:
pkg_alt = []
pkg_alt.extend(providers)
else:
if len(filter(lambda x: x in providers and x not in excluded, system)) > 0:
return True
for p in providers:
if p in excluded: continue
elif satisfy(p, [a for a in providers if a != p], pkg_from):
return True
return False
# missing package
if not binary_u: return False
binary_u = self.binaries['testing'][arch][0][pkg]
# add the package to the system
system[pkg] = (pkg_alt, pkg_from)
# register provided packages
if binary_u['provides']:
for p in binary_u['provides']:
system[p] = ([], pkg)
# check the conflicts
if pkg in conflicts:
name, version, op = conflicts[pkg]
if op == '' and version == '' or apt_pkg.CheckDep(binary_u['version'], op, version):
name, version, op, conflicting = conflicts[pkg]
if conflicting not in binary_u['provides'] and ( \
op == '' and version == '' or check_depends(binary_u['version'], op, version)):
output = handle_conflict(pkg, conflicting, system.copy(), conflicts.copy())
if output:
system, conflicts = output
else:
del system[pkg]
return False
# add the package
lconflicts = conflicts
system.append(pkg)
# register conflicts
if 'conflicts' in binary_u:
for block in map(operator.itemgetter(0), apt_pkg.ParseDepends(binary_u['conflicts'])):
if block[0] != pkg and block[0] in system:
for block in map(operator.itemgetter(0), parse_depends(binary_u['conflicts'])):
name, version, op = block
binary_c = self.binaries['testing'][arch][0][block[0]]
if op == '' and version == '' or apt_pkg.CheckDep(binary_c['version'], op, version):
if name in binary_u['provides']: continue
if block[0] != pkg and block[0] in system:
if block[0] in binaries[0]:
binary_c = binaries[0][block[0]]
else: binary_c = None
if op == '' and version == '' or binary_c and check_depends(binary_c['version'], op, version):
output = handle_conflict(name, pkg, system.copy(), conflicts.copy())
if output:
system, conflicts = output
else:
del system[pkg]
unregister_conflicts(pkg, conflicts)
return False
lconflicts[block[0]] = block
# FIXME: what if more than one package conflicts with it???
conflicts[block[0]] = (name, version, op, pkg)
# dependencies
# its dependencies
dependencies = []
for type in ('Pre-Depends', 'Depends'):
type_key = type.lower()
if type_key not in binary_u: continue
dependencies.extend(apt_pkg.ParseDepends(binary_u[type_key]))
for type in ('pre-depends', 'depends'):
if type not in binary_u: continue
dependencies.extend(parse_depends(binary_u[type]))
# go through them
for block in dependencies:
alternatives = map(operator.itemgetter(0), block)
valid = False
for name, version, op in block:
if name in system or self.check_conflicts(name, arch, system, lconflicts):
if name in system or satisfy(name, [a for a in alternatives if a != name], pkg):
valid = True
break
if not valid:
del system[pkg]
unregister_conflicts(pkg, conflicts)
for p in providers:
if satisfy(p, [a for a in providers if a != p], pkg_from):
return True
return False
conflicts.update(lconflicts)
return True
# check the package at the top of the tree
return satisfy(pkg)
# Package analisys methods
# ------------------------
@ -1349,14 +1441,18 @@ class Britney:
def get_nuninst(self):
nuninst = {}
# local copies for better performances
binaries = self.binaries['testing']
excuse_unsat_deps = self.excuse_unsat_deps
def add_nuninst(pkg, arch):
if pkg not in nuninst[arch]:
nuninst[arch].append(pkg)
for p in self.binaries['testing'][arch][0][pkg]['rdepends']:
tpkg = self.binaries['testing'][arch][0][p[0]]
for p in binaries[arch][0][pkg]['rdepends']:
tpkg = binaries[arch][0][p[0]]
if skip_archall and tpkg['architecture'] == 'all':
continue
r = self.excuse_unsat_deps(p[0], tpkg['source'], arch, 'testing', None, excluded=nuninst[arch])
r = excuse_unsat_deps(p[0], None, arch, 'testing', None, excluded=nuninst[arch], conflicts=False)
if not r:
add_nuninst(p[0], arch)
@ -1366,11 +1462,11 @@ class Britney:
else: skip_archall = False
nuninst[arch] = []
for pkg_name in self.binaries['testing'][arch][0]:
pkg = self.binaries['testing'][arch][0][pkg_name]
for pkg_name in binaries[arch][0]:
pkg = binaries[arch][0][pkg_name]
if skip_archall and pkg['architecture'] == 'all':
continue
r = self.excuse_unsat_deps(pkg_name, pkg['source'], arch, 'testing', None, excluded=nuninst[arch])
r = excuse_unsat_deps(pkg_name, None, arch, 'testing', None, excluded=nuninst[arch], conflicts=False)
if not r:
add_nuninst(pkg_name, arch)
@ -1489,6 +1585,15 @@ class Britney:
extra = []
nuninst_comp = self.get_nuninst()
# local copies for better performances
excuse_unsat_deps = self.excuse_unsat_deps
binaries = self.binaries
sources = self.sources
architectures = self.options.architectures
nobreakall_arches = self.options.nobreakall_arches
new_arches = self.options.new_arches
break_arches = self.options.break_arches
output.write("recur: [%s] %s %d/%d\n" % (",".join(self.selected), "", len(packages), len(extra)))
while packages:
@ -1500,8 +1605,8 @@ class Britney:
pkg_name, suite, affected, undo = self.doop_source(pkg)
for arch in ("/" in pkg and (pkg.split("/")[1],) or self.options.architectures):
if arch not in self.options.nobreakall_arches:
for arch in ("/" in pkg and (pkg.split("/")[1],) or architectures):
if arch not in nobreakall_arches:
skip_archall = True
else: skip_archall = False
@ -1512,9 +1617,9 @@ class Britney:
while len(broken) > l and not (l == 0 and l == len(broken)):
l = len(broken)
for p in filter(lambda x: x[1] == arch, affected):
if p[0] not in self.binaries['testing'][arch][0] or \
skip_archall and self.binaries['testing'][arch][0][p[0]]['architecture'] == 'all': continue
r = self.excuse_unsat_deps(p[0], None, arch, 'testing', None, excluded=broken, conflicts=True)
if p[0] not in binaries['testing'][arch][0] or \
skip_archall and binaries['testing'][arch][0][p[0]]['architecture'] == 'all': continue
r = excuse_unsat_deps(p[0], None, arch, 'testing', None, excluded=broken, conflicts=True)
if not r and p[0] not in broken: broken.append(p[0])
elif r and p[0] in nuninst[arch]:
nuninst[arch].remove(p[0])
@ -1523,18 +1628,18 @@ class Britney:
while l < len(broken):
l = len(broken)
for j in broken:
for p in self.binaries['testing'][arch][0][j]['rdepends']:
if p[0] not in self.binaries['testing'][arch][0] or \
skip_archall and self.binaries['testing'][arch][0][p[0]]['architecture'] == 'all': continue
r = self.excuse_unsat_deps(p[0], None, arch, 'testing', None, excluded=broken, conflicts=True)
for p in binaries['testing'][arch][0][j]['rdepends']:
if p[0] not in binaries['testing'][arch][0] or \
skip_archall and binaries['testing'][arch][0][p[0]]['architecture'] == 'all': continue
r = excuse_unsat_deps(p[0], None, arch, 'testing', None, excluded=broken, conflicts=True)
if not r and p[0] not in broken: broken.append(p[0])
for b in broken:
if b not in nuninst[arch]:
nuninst[arch].append(b)
if (("/" in pkg and arch not in self.options.new_arches) or \
(arch not in self.options.break_arches)) and len(nuninst[arch]) > len(nuninst_comp[arch]):
if (("/" in pkg and arch not in new_arches) or \
(arch not in break_arches)) and len(nuninst[arch]) > len(nuninst_comp[arch]):
better = False
break
@ -1561,19 +1666,19 @@ class Britney:
# undo the changes (source)
for k in undo['sources'].keys():
if k[0] == '-':
del self.sources['testing'][k[1:]]
else: self.sources['testing'][k] = undo['sources'][k]
del sources['testing'][k[1:]]
else: sources['testing'][k] = undo['sources'][k]
# undo the changes (new binaries)
if pkg in self.sources[suite]:
for p in self.sources[suite][pkg]['binaries']:
if pkg in sources[suite]:
for p in sources[suite][pkg]['binaries']:
binary, arch = p.split("/")
del self.binaries['testing'][arch][0][binary]
del binaries['testing'][arch][0][binary]
# undo the changes (binaries)
for p in undo['binaries'].keys():
binary, arch = p.split("/")
self.binaries['testing'][arch][0][binary] = undo['binaries'][p]
binaries['testing'][arch][0][binary] = undo['binaries'][p]
output.write(" finish: [%s]\n" % ",".join(self.selected))
output.write("endloop: %s\n" % (self.eval_nuninst(self.nuninst_orig)))

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