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# Copyright (C) 2010-2013 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/>.
# pylint: disable-msg=W0611,F0401,W0201,E1101,W0232
import sys
import logging
from os.path import isabs, join, dirname
from sugar_network.client import packagekit, SUGAR_API_COMPATIBILITY
from sugar_network.toolkit.spec import parse_version
from sugar_network.toolkit import http, lsb_release, pipe, exception
sys.path.insert(0, join(dirname(__file__), '..', 'lib', 'zeroinstall'))
from zeroinstall.injector import reader, model, arch as _arch
from zeroinstall.injector.config import Config
from zeroinstall.injector.driver import Driver
from zeroinstall.injector.requirements import Requirements
from zeroinstall.injector.arch import machine_ranks
from zeroinstall.injector.distro import try_cleanup_distro_version
model.Interface.__init__ = lambda *args: _interface_init(*args)
reader.check_readable = lambda *args, **kwargs: True
reader.update_from_cache = lambda *args, **kwargs: None
reader.load_feed_from_cache = lambda url, **kwargs: _load_feed(url)
_logger = logging.getLogger('zeroinstall')
_stability = None
_conn = None
def canonicalize_machine(arch):
if arch in ('noarch', 'all'):
return None
return _arch.canonicalize_machine(arch)
def select_architecture(arches):
"""Select most appropriate, for the host system, machine architecture
:param arches:
list of architecture names to select
:returns:
one of passed architecture names, or, `None` if not any
"""
result_rank = 9999
result_arch = None
for arch in arches:
rank = machine_ranks.get(canonicalize_machine(arch))
if rank is not None and rank < result_rank:
result_rank = rank
result_arch = arch
return result_arch
def solve(conn, context, stability):
global _conn, _stability
_conn = conn
_stability = stability
req = Requirements(context)
# TODO
req.command = 'activity'
config = Config()
driver = Driver(config, req)
solver = driver.solver
solver.record_details = True
status = None
ready = False
while True:
solver.solve(context, driver.target_arch, command_name=req.command)
if ready and solver.ready:
break
ready = solver.ready
resolved = None
for url in solver.feeds_used:
feed = config.iface_cache.get_feed(url)
if feed is None:
continue
while feed.to_resolve:
try:
resolved = packagekit.resolve(feed.to_resolve.pop(0))
except Exception, error:
if feed.to_resolve:
continue
if status is None:
status = conn.get(cmd='status')
if status['route'] == 'offline':
raise http.ServiceUnavailable(str(error))
else:
raise
feed.resolve(resolved.values())
feed.to_resolve = None
if not resolved:
break
selections = solver.selections.selections
missed = []
top_summary = []
dep_summary = []
for iface, impls in solver.details.items():
summary = (top_summary if iface.uri == context else dep_summary)
summary.append(iface.uri)
if impls:
sel = selections.get(iface.uri)
for impl, reason in impls:
if not reason and sel is None:
reason = 'wrong version'
missed.append(iface.uri)
if reason:
reason = '(%s)' % reason
summary.append('%s v%s %s' % (
'*' if sel is not None and sel.impl is impl else ' ',
impl.get_version(),
reason or '',
))
else:
summary.append(' (no versions)')
missed.append(iface.uri)
pipe.trace('\n '.join(['Solving results:'] + top_summary + dep_summary))
if not ready:
# pylint: disable-msg=W0212
reason_exception = solver.get_failure_reason()
if reason_exception is not None:
reason = reason_exception.message
else:
reason = 'Cannot find implementations for %s' % ', '.join(missed)
raise RuntimeError(reason)
solution = []
solution.append(_impl_new(config, context, selections[context]))
for iface, sel in selections.items():
if sel is not None and iface != context:
solution.append(_impl_new(config, iface, sel))
return solution
def _interface_init(self, url):
self.uri = url
self.reset()
def _impl_new(config, iface, sel):
feed = config.iface_cache.get_feed(iface)
impl = {'id': sel.id,
'context': iface,
'version': sel.version,
'name': feed.title,
'stability': sel.impl.upstream_stability.name,
}
if sel.impl.hints:
for key in ('mime_type', 'blob_size', 'unpack_size'):
value = sel.impl.hints.get(key)
if value is not None:
impl[key] = value
if isabs(sel.id):
impl['spec'] = join(sel.id, 'activity', 'activity.info')
if sel.local_path:
impl['path'] = sel.local_path
if sel.impl.to_install:
impl['install'] = sel.impl.to_install
if sel.impl.download_sources:
prefix = sel.impl.download_sources[0].extract
if prefix:
impl['prefix'] = prefix
commands = sel.get_commands()
if commands:
impl['command'] = commands.values()[0].path.split()
return impl
def _load_feed(context):
feed = _Feed(context)
if context == 'sugar':
try:
from jarabe import config
host_version = '.'.join(config.version.split('.', 2)[:2])
except ImportError:
# XXX sweets-sugar binding might be not sourced
host_version = '0.94'
for version in SUGAR_API_COMPATIBILITY.get(host_version) or []:
feed.implement_sugar(version)
feed.name = feed.title = context
return feed
feed_content = None
try:
feed_content = _conn.get(['context', context], cmd='feed',
stability=_stability, distro=lsb_release.distributor_id())
pipe.trace('Found %s feed: %r', context, feed_content)
except http.ServiceUnavailable:
pipe.trace('Failed to fetch %s feed', context)
raise
except Exception:
exception(_logger, 'Failed to fetch %r feed', context)
pipe.trace('No feeds for %s', context)
return None
# XXX 0install fails on non-ascii `name` values
feed.name = context
feed.title = feed_content['name']
feed.to_resolve = feed_content.get('packages')
if not feed.to_resolve:
pipe.trace('No compatible packages for %s', context)
for impl in feed_content['implementations']:
feed.implement(impl)
if not feed.to_resolve and not feed.implementations:
pipe.trace('No implementations for %s', context)
return feed
class _Feed(model.ZeroInstallFeed):
# pylint: disable-msg=E0202
def __init__(self, context):
self.context = context
self.local_path = None
self.implementations = {}
self.last_modified = None
self.feeds = []
self.metadata = []
self.last_checked = None
self.to_resolve = None
self._package_implementations = []
self.title = None
@property
def url(self):
return self.context
@property
def feed_for(self):
return set([self.context])
def resolve(self, packages):
top_package = packages[0]
impl = _Implementation(self, self.context, None)
impl.version = parse_version(top_package['version'])
impl.released = 0
impl.arch = '*-%s' % (top_package['arch'] or '*')
impl.upstream_stability = model.stability_levels['packaged']
impl.to_install = [i for i in packages if not i['installed']]
impl.add_download_source(self.context, 0, None)
self.implementations[self.context] = impl
def implement(self, release):
impl_id = release['guid']
impl = _Implementation(self, impl_id, None)
impl.version = parse_version(release['version'])
impl.released = 0
impl.arch = release['arch']
impl.upstream_stability = model.stability_levels['stable']
impl.requires.extend(_read_requires(release.get('requires')))
impl.hints = release
if isabs(impl_id):
impl.local_path = impl_id
else:
impl.add_download_source(impl_id,
release.get('size') or 0, release.get('extract'))
for name, command in release['commands'].items():
impl.commands[name] = _Command(name, command)
for name, insert, mode in release.get('bindings') or []:
binding = model.EnvironmentBinding(name, insert, mode=mode)
impl.bindings.append(binding)
self.implementations[impl_id] = impl
def implement_sugar(self, sugar_version):
impl_id = 'sugar-%s' % sugar_version
impl = _Implementation(self, impl_id, None)
impl.version = parse_version(sugar_version)
impl.released = 0
impl.arch = '*-*'
impl.upstream_stability = model.stability_levels['packaged']
impl.local_path = '/'
self.implementations[impl_id] = impl
class _Implementation(model.ZeroInstallImplementation):
to_install = None
hints = None
class _Dependency(model.InterfaceDependency):
def __init__(self, guid, data):
self._importance = data.get('importance', model.Dependency.Essential)
self._metadata = {}
self.qdom = None
self.interface = guid
self.restrictions = []
self.bindings = []
for not_before, before in data.get('restrictions') or []:
restriction = model.VersionRangeRestriction(
not_before=parse_version(not_before),
before=parse_version(before))
self.restrictions.append(restriction)
@property
def context(self):
return self.interface
@property
def metadata(self):
return self._metadata
@property
def importance(self):
return self._importance
def get_required_commands(self):
return []
@property
def command(self):
pass
class _Command(model.Command):
def __init__(self, name, data):
self.qdom = None
self.name = name
self._path = data['exec']
self._requires = _read_requires(data.get('requires'))
@property
def path(self):
return self._path
@property
def requires(self):
return self._requires
def get_runner(self):
pass
def __str__(self):
return ''
@property
def bindings(self):
return []
def _read_requires(data):
result = []
for guid, dep_data in (data or {}).items():
result.append(_Dependency(guid, dep_data))
return result
if __name__ == '__main__':
from pprint import pprint
logging.basicConfig(level=logging.DEBUG)
pipe.trace = logging.info
pprint(solve(*sys.argv[1:]))
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