# 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, dep_getkey, 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 __nonzero__(self): self._load() return bool(self._atoms or self._nonatoms) 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, rev_transform.iterkeys()) 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: provided_cp = dep_getkey(provide) 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 dep_getkey(a) == 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)