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# -*- coding: utf-8 -*-
#
# File: portato/backend/portage/settings.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 2006-2010 René 'Necoro' Neumann
# This is free software. You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
#
# Written by René 'Necoro' Neumann <necoro@necoro.net>
from __future__ import absolute_import
import os
import portage
from threading import Lock
class PortageSettings:
"""Encapsulation of the portage settings.
@ivar settings: portage settings
@ivar settingslock: a simple Lock
@ivar trees: a dictionary of the trees
@ivar porttree: shortcut to C{trees[root]["porttree"]}
@ivar vartree: shortcut to C{trees[root]["vartree"]}
@ivar virtuals: shortcut to C{trees[root]["virtuals"]}"""
def __init__ (self):
"""Initializes the instance. Calls L{load()}."""
self.settingslock = Lock()
self.trees = None
self.load()
def load(self):
"""(Re)loads the portage settings and sets the variables."""
kwargs = {}
for k, envvar in (("config_root", "PORTAGE_CONFIGROOT"), ("target_root", "ROOT")):
kwargs[k] = os.environ.get(envvar, None)
self.trees = portage.create_trees(trees=self.trees, **kwargs)
self.settings = self.trees["/"]["vartree"].settings
for myroot in self.trees:
if myroot != "/":
self.settings = self.trees[myroot]["vartree"].settings
break
self.settings.unlock()
root = self.settings["ROOT"]
self.porttree = self.trees[root]["porttree"]
self.vartree = self.trees[root]["vartree"]
self.virtuals = self.trees[root]["virtuals"]
self.global_settings = portage.config(clone=self.settings)
self._cpv = None
portage.settings = None # we use our own one ...
def setcpv (self, cpv, **kwargs):
if cpv != self._cpv:
self.settings.setcpv(cpv, **kwargs)
self._cpv = cpv
def reset (self):
self.settings.reset()
self._cpv = None
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