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# Copyright (C) 2012-2014 Aleksey Lim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import bisect
import logging
from sugar_network import db, toolkit
from sugar_network.model import Release, context as base_context
from sugar_network.node import obs
from sugar_network.toolkit.router import ACL
from sugar_network.toolkit.coroutine import this
from sugar_network.toolkit import spec, sat, http, coroutine, enforce
_logger = logging.getLogger('node.model')
_presolve_queue = None
class _Release(Release):
_package_cast = db.Dict(db.List())
def typecast(self, value):
if not this.resource.exists or 'package' not in this.resource['type']:
return Release.typecast(self, value)
value = self._package_cast.typecast(value)
enforce(value.get('binary'), http.BadRequest, 'No binary aliases')
distro = this.request.key
if distro == '*':
lsb_id = None
lsb_release = None
elif '-' in this.request.key:
lsb_id, lsb_release = distro.split('-', 1)
else:
lsb_id = distro
lsb_release = None
releases = this.resource.record.get('releases')
resolves = releases['value'].setdefault('resolves', {})
to_presolve = []
for repo in obs.get_repos():
if lsb_id and lsb_id != repo['lsb_id'] or \
lsb_release and lsb_release != repo['lsb_release']:
continue
# Make sure there are no alias overrides
if not lsb_id and repo['lsb_id'] in releases['value'] or \
not lsb_release and repo['name'] in releases['value']:
continue
pkgs = sum([value.get(i, []) for i in ('binary', 'devel')], [])
version = None
try:
for arch in repo['arches']:
version = obs.resolve(repo['name'], arch, pkgs)['version']
except Exception, error:
_logger.warning('Failed to resolve %r on %s',
pkgs, repo['name'])
resolve = {'status': str(error)}
else:
to_presolve.append((repo['name'], pkgs))
resolve = {
'version': spec.parse_version(version),
'packages': pkgs,
'status': 'success',
}
resolves.setdefault(repo['name'], {}).update(resolve)
if to_presolve and _presolve_queue is not None:
_presolve_queue.put(to_presolve)
if resolves:
this.resource.record.set('releases', **releases)
return value
def teardown(self, value):
if 'package' not in this.resource['type']:
return Release.typecast(self, value)
# TODO Delete presolved files
class Context(base_context.Context):
@db.stored_property(db.Aggregated, subtype=_Release(),
acl=ACL.READ | ACL.INSERT | ACL.REMOVE | ACL.REPLACE)
def releases(self, value):
return value
@releases.setter
def releases(self, value):
if value or this.request.method != 'POST':
self.invalidate_solutions()
return value
def diff(volume, in_seq, out_seq=None, exclude_seq=None, layer=None,
ignore_documents=None, **kwargs):
if out_seq is None:
out_seq = toolkit.Sequence([])
is_the_only_seq = not out_seq
if layer:
if isinstance(layer, basestring):
layer = [layer]
layer.append('common')
try:
for resource, directory in volume.items():
if ignore_documents and resource in ignore_documents:
continue
coroutine.dispatch()
directory.commit()
yield {'resource': resource}
for guid, patch in directory.diff(in_seq, exclude_seq,
layer=layer if resource == 'context' else None):
adiff = {}
adiff_seq = toolkit.Sequence()
for prop, meta, seqno in patch:
adiff[prop] = meta
adiff_seq.include(seqno, seqno)
if adiff:
yield {'guid': guid, 'diff': adiff}
out_seq.include(adiff_seq)
if is_the_only_seq:
# There is only one diff, so, we can stretch it to remove all holes
out_seq.stretch()
except StopIteration:
pass
yield {'commit': out_seq}
def merge(volume, records):
directory = None
commit_seq = toolkit.Sequence()
merged_seq = toolkit.Sequence()
synced = False
for record in records:
resource_ = record.get('resource')
if resource_:
directory = volume[resource_]
continue
if 'guid' in record:
seqno, merged = directory.merge(**record)
synced = synced or merged
if seqno is not None:
merged_seq.include(seqno, seqno)
continue
commit = record.get('commit')
if commit is not None:
commit_seq.include(commit)
continue
if synced:
this.broadcast({'event': 'sync'})
return commit_seq, merged_seq
def solve(volume, top_context, lsb_id=None, lsb_release=None,
stability=None, requires=None):
top_context = volume['context'][top_context]
top_stability = stability or ['stable']
if isinstance(top_stability, basestring):
top_stability = [top_stability]
top_cond = None
top_requires = {}
if isinstance(requires, basestring):
top_requires.update(spec.parse_requires(requires))
elif requires:
for i in requires:
top_requires.update(spec.parse_requires(i))
if top_context['dependencies']:
top_requires.update(spec.parse_requires(top_context['dependencies']))
if top_context.guid in top_requires:
top_cond = top_requires.pop(top_context.guid)
lsb_distro = '-'.join([lsb_id, lsb_release]) if lsb_release else None
varset = [None]
context_clauses = {}
clauses = []
_logger.debug('Solve %r lsb_id=%r lsb_release=%r stability=%r requires=%r',
top_context.guid, lsb_id, lsb_release, top_stability, top_requires)
def ensure_version(version, cond):
if not cond:
return True
for not_before, before in cond['restrictions']:
if before is not None and version >= before or \
not_before is not None and version < not_before:
return False
return True
def rate_release(digest, release):
return [_STABILITY_RATES.get(release['stability']) or 0,
release['version'],
digest,
]
def add_deps(context, v_usage, deps):
if top_requires and context.guid == top_context.guid:
deps.update(top_requires)
for dep, cond in deps.items():
dep_clause = [-v_usage]
for v_release in add_context(dep):
if ensure_version(varset[v_release][0], cond):
dep_clause.append(v_release)
clauses.append(dep_clause)
def add_context(context):
if context in context_clauses:
return context_clauses[context]
context = volume['context'][context]
releases = context['releases']
clause = []
if 'package' in context['type']:
pkg_lst = None
pkg_ver = []
pkg = releases.get('resolves', {}).get(lsb_distro)
if pkg:
pkg_ver = pkg['version']
pkg_lst = pkg['packages']
else:
alias = releases.get(lsb_id) or releases.get('*')
if alias:
alias = alias['value']
pkg_lst = alias.get('binary', []) + alias.get('devel', [])
if pkg_lst:
clause.append(len(varset))
varset.append((pkg_ver, 'packages', {context.guid: pkg_lst}))
else:
candidates = []
for digest, release in releases.items():
if 'value' not in release:
continue
release = release['value']
if release['stability'] not in top_stability or \
context.guid == top_context.guid and \
not ensure_version(release['version'], top_cond):
continue
bisect.insort(candidates, rate_release(digest, release))
for release in reversed(candidates):
digest = release[-1]
release = releases[digest]['value']
v_release = len(varset)
varset.append((
release['version'],
'files',
{context.guid: digest},
))
clause.append(v_release)
add_deps(context, v_release, release.get('requires') or {})
if clause:
context_clauses[context.guid] = clause
else:
_logger.trace('No candidates for %r', context.guid)
return clause
top_clause = add_context(top_context.guid)
if not top_clause:
_logger.debug('No versions for %r', top_context.guid)
return None
result = sat.solve(clauses + [top_clause], context_clauses)
if not result:
_logger.debug('Failed to solve %r', top_context.guid)
return None
if not top_context.guid in result:
_logger.debug('No top versions for %r', top_context.guid)
return None
solution = {'files': {}, 'packages': {}}
for v in result.values():
__, key, items = varset[v]
solution[key].update(items)
top_release = top_context['releases'][solution['files'][top_context.guid]]
solution['commands'] = top_release['value']['commands']
_logger.debug('Solution for %r: %r', top_context.guid, solution)
return solution
def presolve(presolve_path):
global _presolve_queue
_presolve_queue = coroutine.Queue()
for repo_name, pkgs in _presolve_queue:
obs.presolve(repo_name, pkgs, presolve_path)
_STABILITY_RATES = {
'insecure': 0,
'buggy': 1,
'developer': 2,
'testing': 3,
'stable': 4,
}
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