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# Copyright 2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
import sys
from portage import cpv_getkey, flatten
from portage.dep import Atom, isvalidatom, match_from_list, \
best_match_to_list, use_reduce, paren_reduce
from portage.exception import InvalidAtom
if sys.hexversion >= 0x3000000:
basestring = str
OPERATIONS = ["merge", "unmerge"]
class PackageSet(object):
# Set this to operations that are supported by your subclass. While
# technically there is no difference between "merge" and "unmerge" regarding
# package sets, the latter doesn't make sense for some sets like "system"
# or "security" and therefore isn't supported by them.
_operations = ["merge"]
description = "generic package set"
def __init__(self):
self._atoms = set()
self._atommap = {}
self._loaded = False
self._loading = False
self.errors = []
self._nonatoms = set()
self.world_candidate = True
def __contains__(self, atom):
self._load()
return atom in self._atoms or atom in self._nonatoms
def __iter__(self):
self._load()
for x in self._atoms:
yield x
for x in self._nonatoms:
yield x
def __bool__(self):
self._load()
return bool(self._atoms or self._nonatoms)
if sys.hexversion < 0x3000000:
__nonzero__ = __bool__
def supportsOperation(self, op):
if not op in OPERATIONS:
raise ValueError(op)
return op in self._operations
def _load(self):
if not (self._loaded or self._loading):
self._loading = True
self.load()
self._loaded = True
self._loading = False
def getAtoms(self):
self._load()
return self._atoms.copy()
def getNonAtoms(self):
self._load()
return self._nonatoms.copy()
def _setAtoms(self, atoms):
self._atoms.clear()
self._nonatoms.clear()
for a in atoms:
if not isinstance(a, Atom):
if isinstance(a, basestring):
a = a.strip()
if not a:
continue
try:
a = Atom(a)
except InvalidAtom:
self._nonatoms.add(a)
continue
self._atoms.add(a)
self._updateAtomMap()
def load(self):
# This method must be overwritten by subclasses
# Editable sets should use the value of self._mtime to determine if they
# need to reload themselves
raise NotImplementedError()
def containsCPV(self, cpv):
self._load()
for a in self._atoms:
if match_from_list(a, [cpv]):
return True
return False
def getMetadata(self, key):
if hasattr(self, key.lower()):
return getattr(self, key.lower())
else:
return ""
def _updateAtomMap(self, atoms=None):
"""Update self._atommap for specific atoms or all atoms."""
if not atoms:
self._atommap.clear()
atoms = self._atoms
for a in atoms:
self._atommap.setdefault(a.cp, set())
self._atommap[a.cp].add(a)
# Not sure if this one should really be in PackageSet
def findAtomForPackage(self, pkg):
"""Return the best match for a given package from the arguments, or
None if there are no matches. This matches virtual arguments against
the PROVIDE metadata. This can raise an InvalidDependString exception
if an error occurs while parsing PROVIDE."""
# Atoms matched via PROVIDE must be temporarily transformed since
# match_from_list() only works correctly when atom.cp == pkg.cp.
rev_transform = {}
for atom in self.iterAtomsForPackage(pkg):
if atom.cp == pkg.cp:
rev_transform[atom] = atom
else:
rev_transform[Atom(atom.replace(atom.cp, pkg.cp, 1))] = atom
best_match = best_match_to_list(pkg, iter(rev_transform))
if best_match:
return rev_transform[best_match]
return None
def iterAtomsForPackage(self, pkg):
"""
Find all matching atoms for a given package. This matches virtual
arguments against the PROVIDE metadata. This will raise an
InvalidDependString exception if PROVIDE is invalid.
"""
cpv_slot_list = [pkg]
cp = cpv_getkey(pkg.cpv)
self._load() # make sure the atoms are loaded
atoms = self._atommap.get(cp)
if atoms:
for atom in atoms:
if match_from_list(atom, cpv_slot_list):
yield atom
provides = pkg.metadata['PROVIDE']
if not provides:
return
provides = provides.split()
for provide in provides:
try:
provided_cp = Atom(provide).cp
except InvalidAtom:
continue
atoms = self._atommap.get(provided_cp)
if atoms:
for atom in atoms:
if match_from_list(atom.replace(provided_cp, cp),
cpv_slot_list):
yield atom
class EditablePackageSet(PackageSet):
def update(self, atoms):
self._load()
modified = False
normal_atoms = []
for a in atoms:
if not isinstance(a, Atom):
try:
a = Atom(a)
except InvalidAtom:
modified = True
self._nonatoms.add(a)
continue
normal_atoms.append(a)
if normal_atoms:
modified = True
self._atoms.update(normal_atoms)
self._updateAtomMap(atoms=normal_atoms)
if modified:
self.write()
def add(self, atom):
self.update([atom])
def replace(self, atoms):
self._setAtoms(atoms)
self.write()
def remove(self, atom):
self._load()
self._atoms.discard(atom)
self._nonatoms.discard(atom)
self._updateAtomMap()
self.write()
def removePackageAtoms(self, cp):
self._load()
for a in list(self._atoms):
if a.cp == cp:
self.remove(a)
self.write()
def write(self):
# This method must be overwritten in subclasses that should be editable
raise NotImplementedError()
class InternalPackageSet(EditablePackageSet):
def __init__(self, initial_atoms=None):
super(InternalPackageSet, self).__init__()
if initial_atoms != None:
self.update(initial_atoms)
def clear(self):
self._atoms.clear()
self._updateAtomMap()
def load(self):
pass
def write(self):
pass
class DummyPackageSet(PackageSet):
def __init__(self, atoms=None):
super(DummyPackageSet, self).__init__()
if atoms:
self._setAtoms(atoms)
def load(self):
pass
def singleBuilder(cls, options, settings, trees):
atoms = options.get("packages", "").split()
return DummyPackageSet(atoms=atoms)
singleBuilder = classmethod(singleBuilder)
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