def __init__(
self,
root_config,
pkg_cache=None,
pkg_root_config=None,
dynamic_deps=False,
ignore_built_slot_operator_deps=False,
soname_deps=False,
):
self._root_config = root_config
self._dynamic_deps = dynamic_deps
self._ignore_built_slot_operator_deps = ignore_built_slot_operator_deps
if pkg_root_config is None:
pkg_root_config = self._root_config
self._pkg_root_config = pkg_root_config
if pkg_cache is None:
pkg_cache = {}
real_vartree = root_config.trees["vartree"]
self._real_vardb = real_vartree.dbapi
portdb = root_config.trees["porttree"].dbapi
self.settings = real_vartree.settings
mykeys = list(real_vartree.dbapi._aux_cache_keys)
if "_mtime_" not in mykeys:
mykeys.append("_mtime_")
self._db_keys = mykeys
self._pkg_cache = pkg_cache
self.dbapi = PackageVirtualDbapi(real_vartree.settings)
if soname_deps:
self.dbapi = PackageDbapiProvidesIndex(self.dbapi)
self.dbapi.getpath = FakeVardbGetPath(self.dbapi)
self.dbapi._aux_cache_keys = set(self._db_keys)
# Initialize variables needed for lazy cache pulls of the live ebuild
# metadata. This ensures that the vardb lock is released ASAP, without
# being delayed in case cache generation is triggered.
self._aux_get = self.dbapi.aux_get
self._match = self.dbapi.match
if dynamic_deps:
self.dbapi.aux_get = self._aux_get_wrapper
self.dbapi.match = self._match_wrapper
self._aux_get_history = set()
self._portdb_keys = Package._dep_keys + ("EAPI", "KEYWORDS")
self._portdb = portdb
self._global_updates = None
def __init__(self, root_config, pkg_cache=None, pkg_root_config=None,
dynamic_deps=True, ignore_built_slot_operator_deps=False,
soname_deps=False):
self._root_config = root_config
self._dynamic_deps = dynamic_deps
self._ignore_built_slot_operator_deps = ignore_built_slot_operator_deps
if pkg_root_config is None:
pkg_root_config = self._root_config
self._pkg_root_config = pkg_root_config
if pkg_cache is None:
pkg_cache = {}
real_vartree = root_config.trees["vartree"]
self._real_vardb = real_vartree.dbapi
portdb = root_config.trees["porttree"].dbapi
self.settings = real_vartree.settings
mykeys = list(real_vartree.dbapi._aux_cache_keys)
if "_mtime_" not in mykeys:
mykeys.append("_mtime_")
self._db_keys = mykeys
self._pkg_cache = pkg_cache
self.dbapi = PackageVirtualDbapi(real_vartree.settings)
if soname_deps:
self.dbapi = PackageDbapiProvidesIndex(self.dbapi)
self.dbapi.getpath = FakeVardbGetPath(self.dbapi)
self.dbapi._aux_cache_keys = set(self._db_keys)
# Initialize variables needed for lazy cache pulls of the live ebuild
# metadata. This ensures that the vardb lock is released ASAP, without
# being delayed in case cache generation is triggered.
self._aux_get = self.dbapi.aux_get
self._match = self.dbapi.match
if dynamic_deps:
self.dbapi.aux_get = self._aux_get_wrapper
self.dbapi.match = self._match_wrapper
self._aux_get_history = set()
self._portdb_keys = Package._dep_keys + ("EAPI", "KEYWORDS")
self._portdb = portdb
self._global_updates = None
class FakeVartree(vartree):
"""This is implements an in-memory copy of a vartree instance that provides
all the interfaces required for use by the depgraph. The vardb is locked
during the constructor call just long enough to read a copy of the
installed package information. This allows the depgraph to do it's
dependency calculations without holding a lock on the vardb. It also
allows things like vardb global updates to be done in memory so that the
user doesn't necessarily need write access to the vardb in cases where
global updates are necessary (updates are performed when necessary if there
is not a matching ebuild in the tree). Instances of this class are not
populated until the sync() method is called."""
def __init__(self, root_config, pkg_cache=None, pkg_root_config=None,
dynamic_deps=True, ignore_built_slot_operator_deps=False,
soname_deps=False):
self._root_config = root_config
self._dynamic_deps = dynamic_deps
self._ignore_built_slot_operator_deps = ignore_built_slot_operator_deps
if pkg_root_config is None:
pkg_root_config = self._root_config
self._pkg_root_config = pkg_root_config
if pkg_cache is None:
pkg_cache = {}
real_vartree = root_config.trees["vartree"]
self._real_vardb = real_vartree.dbapi
portdb = root_config.trees["porttree"].dbapi
self.settings = real_vartree.settings
mykeys = list(real_vartree.dbapi._aux_cache_keys)
if "_mtime_" not in mykeys:
mykeys.append("_mtime_")
self._db_keys = mykeys
self._pkg_cache = pkg_cache
self.dbapi = PackageVirtualDbapi(real_vartree.settings)
if soname_deps:
self.dbapi = PackageDbapiProvidesIndex(self.dbapi)
self.dbapi.getpath = FakeVardbGetPath(self.dbapi)
self.dbapi._aux_cache_keys = set(self._db_keys)
# Initialize variables needed for lazy cache pulls of the live ebuild
# metadata. This ensures that the vardb lock is released ASAP, without
# being delayed in case cache generation is triggered.
self._aux_get = self.dbapi.aux_get
self._match = self.dbapi.match
if dynamic_deps:
self.dbapi.aux_get = self._aux_get_wrapper
self.dbapi.match = self._match_wrapper
self._aux_get_history = set()
self._portdb_keys = Package._dep_keys + ("EAPI", "KEYWORDS")
self._portdb = portdb
self._global_updates = None
@property
def root(self):
warnings.warn("The root attribute of "
"_emerge.FakeVartree.FakeVartree"
" is deprecated. Use "
"settings['ROOT'] instead.",
DeprecationWarning, stacklevel=3)
return self.settings['ROOT']
def _match_wrapper(self, cpv, use_cache=1):
"""
Make sure the metadata in Package instances gets updated for any
cpv that is returned from a match() call, since the metadata can
be accessed directly from the Package instance instead of via
aux_get().
"""
matches = self._match(cpv, use_cache=use_cache)
for cpv in matches:
if cpv in self._aux_get_history:
continue
self._aux_get_wrapper(cpv, [])
return matches
def _aux_get_wrapper(self, cpv, wants, myrepo=None):
if cpv in self._aux_get_history:
return self._aux_get(cpv, wants)
self._aux_get_history.add(cpv)
# This raises a KeyError to the caller if appropriate.
pkg = self.dbapi._cpv_map[cpv]
try:
live_metadata = dict(zip(self._portdb_keys,
self._portdb.aux_get(cpv, self._portdb_keys,
myrepo=pkg.repo)))
except (KeyError, portage.exception.PortageException):
live_metadata = None
self._apply_dynamic_deps(pkg, live_metadata)
return self._aux_get(cpv, wants)
def _apply_dynamic_deps(self, pkg, live_metadata):
try:
if live_metadata is None:
raise _DynamicDepsNotApplicable()
# Use the metadata from the installed instance if the EAPI
# of either instance is unsupported, since if the installed
# instance has an unsupported or corrupt EAPI then we don't
# want to attempt to do complex operations such as execute
# pkg_config, pkg_prerm or pkg_postrm phases. If both EAPIs
# are supported then go ahead and use the live_metadata, in
# order to respect dep updates without revision bump or EAPI
# bump, as in bug #368725.
if not (portage.eapi_is_supported(live_metadata["EAPI"]) and \
portage.eapi_is_supported(pkg.eapi)):
raise _DynamicDepsNotApplicable()
# preserve built slot/sub-slot := operator deps
built_slot_operator_atoms = None
if not self._ignore_built_slot_operator_deps and \
_get_eapi_attrs(pkg.eapi).slot_operator:
try:
built_slot_operator_atoms = \
find_built_slot_operator_atoms(pkg)
except InvalidDependString:
pass
if built_slot_operator_atoms:
live_eapi_attrs = _get_eapi_attrs(live_metadata["EAPI"])
if not live_eapi_attrs.slot_operator:
raise _DynamicDepsNotApplicable()
for k, v in built_slot_operator_atoms.items():
live_metadata[k] += (" " +
" ".join(_unicode(atom) for atom in v))
self.dbapi.aux_update(pkg.cpv, live_metadata)
except _DynamicDepsNotApplicable:
if self._global_updates is None:
self._global_updates = \
grab_global_updates(self._portdb)
# Bypass _aux_get_wrapper, since calling that
# here would trigger infinite recursion.
aux_keys = Package._dep_keys + self.dbapi._pkg_str_aux_keys
aux_dict = dict(zip(aux_keys, self._aux_get(pkg.cpv, aux_keys)))
perform_global_updates(
pkg.cpv, aux_dict, self.dbapi, self._global_updates)
def dynamic_deps_preload(self, pkg, metadata):
if metadata is not None:
metadata = dict((k, metadata.get(k, ''))
for k in self._portdb_keys)
self._apply_dynamic_deps(pkg, metadata)
self._aux_get_history.add(pkg.cpv)
def cpv_discard(self, pkg):
"""
Discard a package from the fake vardb if it exists.
"""
old_pkg = self.dbapi.get(pkg)
if old_pkg is not None:
self.dbapi.cpv_remove(old_pkg)
self._pkg_cache.pop(old_pkg, None)
self._aux_get_history.discard(old_pkg.cpv)
def sync(self, acquire_lock=1):
"""
Call this method to synchronize state with the real vardb
after one or more packages may have been installed or
uninstalled.
"""
locked = False
try:
if acquire_lock and os.access(self._real_vardb._dbroot, os.W_OK):
self._real_vardb.lock()
locked = True
self._sync()
finally:
if locked:
self._real_vardb.unlock()
# Populate the old-style virtuals using the cached values.
# Skip the aux_get wrapper here, to avoid unwanted
# cache generation.
try:
self.dbapi.aux_get = self._aux_get
self.settings._populate_treeVirtuals_if_needed(self)
finally:
if self._dynamic_deps:
self.dbapi.aux_get = self._aux_get_wrapper
def _sync(self):
real_vardb = self._root_config.trees["vartree"].dbapi
current_cpv_set = frozenset(real_vardb.cpv_all())
pkg_vardb = self.dbapi
# Remove any packages that have been uninstalled.
for pkg in list(pkg_vardb):
if pkg.cpv not in current_cpv_set:
self.cpv_discard(pkg)
# Validate counters and timestamps.
slot_counters = {}
root_config = self._pkg_root_config
validation_keys = ["COUNTER", "_mtime_"]
for cpv in current_cpv_set:
pkg_hash_key = Package._gen_hash_key(cpv=cpv,
installed=True, root_config=root_config,
type_name="installed")
pkg = pkg_vardb.get(pkg_hash_key)
if pkg is not None:
counter, mtime = real_vardb.aux_get(cpv, validation_keys)
try:
counter = long(counter)
except ValueError:
counter = 0
if counter != pkg.counter or \
mtime != pkg.mtime:
self.cpv_discard(pkg)
pkg = None
if pkg is None:
pkg = self._pkg(cpv)
other_counter = slot_counters.get(pkg.slot_atom)
if other_counter is not None:
if other_counter > pkg.counter:
continue
slot_counters[pkg.slot_atom] = pkg.counter
pkg_vardb.cpv_inject(pkg)
real_vardb.flush_cache()
def _pkg(self, cpv):
"""
The RootConfig instance that will become the Package.root_config
attribute can be overridden by the FakeVartree pkg_root_config
constructory argument, since we want to be consistent with the
depgraph._pkg() method which uses a specially optimized
RootConfig that has a FakeVartree instead of a real vartree.
"""
pkg = Package(cpv=cpv, built=True, installed=True,
metadata=zip(self._db_keys,
self._real_vardb.aux_get(cpv, self._db_keys)),
root_config=self._pkg_root_config,
type_name="installed")
self._pkg_cache[pkg] = pkg
return pkg
