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# config.py -- Portage Config
# Copyright 2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$
import os
from UserDict import UserDict
class PackageKeywords(UserDict):
"""
A base class stub for things to inherit from; some people may want a database based package.keywords or something
Internally dict has pairs of the form
{'cpv':['keyword1','keyword2','keyword3'...]
"""
data = {}
def iteritems(self):
return self.data.iteritems()
def keys(self):
return self.data.keys()
def __contains__(self, other):
return other in self.data
def __hash__( self ):
return self.data.__hash__()
class PackageKeywordsFile(PackageKeywords):
"""
Inherits from PackageKeywords; implements a file-based backend. Doesn't handle recursion yet.
"""
def __init__( self, filename ):
self.fname = filename
def load(self, recursive):
"""
Package.keywords files have comments that begin with #.
The entries are of the form:
>>> cpv [-~]keyword1 [-~]keyword2 keyword3
>>> Exceptions include -*, ~*, and ** for keywords.
"""
if os.path.exists( self.fname ):
f = open(self.fname, 'rb')
for line in f:
if line.startswith('#'):
continue
split = line.split()
if len(split):
# Surprisingly this works for iterables of length 1
# fex ['sys-apps/portage','x86','amd64'] becomes {'sys-apps/portage':['x86','amd64']}
key, items = split[0],split[1:]
# if they specify the same cpv twice; stack the values (append) instead of overwriting.
if key in self.data:
self.data[key].append(items)
else:
self.data[key] = items
class PackageUse(UserDict):
"""
A base class stub for things to inherit from; some people may want a database based package.keywords or something
Internally dict has pairs of the form
{'cpv':['flag1','flag22','flag3'...]
"""
data = {}
def iteritems(self):
return self.data.iteritems()
def __hash__(self):
return hash(self.data)
def __contains__(self, other):
return other in self.data
def keys(self):
return self.data.keys()
class PackageUseFile(PackageUse):
"""
Inherits from PackageUse; implements a file-based backend. Doesn't handle recursion yet.
"""
def __init__(self, filename):
self.fname = filename
def load(self, recursive):
"""
Package.keywords files have comments that begin with #.
The entries are of the form:
>>> atom useflag1 useflag2 useflag3..
useflags may optionally be negative with a minus sign (-)
>>> atom useflag1 -useflag2 useflag3
"""
if os.path.exists( self.fname ):
f = open(self.fname, 'rb')
for line in f:
if line.startswith('#'):
continue
split = line.split()
if len(split):
# Surprisingly this works for iterables of length 1
# fex ['sys-apps/portage','foo','bar'] becomes {'sys-apps/portage':['foo','bar']}
key, items = split[0],split[1:]
# if they specify the same cpv twice; stack the values (append) instead of overwriting.
if key in self.data:
self.data[key].append(items)
else:
self.data[key] = items
class PackageMask(UserDict):
"""
A base class for Package.mask functionality
"""
data = {}
def iteritems(self):
return self.data.iteritems()
def __hash__(self):
return hash(self.data)
def __contains__(self, other):
return other in self.data
def keys(self):
return self.data.keys()
def iterkeys(self):
return self.data.iterkeys()
class PackageMaskFile(PackageMask):
"""
A class that implements a file-based package.mask
Entires in package.mask are of the form:
atom1
atom2
or optionally
-atom3
to revert a previous mask; this only works when masking files are stacked
"""
def __init__(self, filename):
self.fname = filename
def load(self, recursive):
"""
Package.keywords files have comments that begin with #.
The entries are of the form:
>>> atom useflag1 useflag2 useflag3..
useflags may optionally be negative with a minus sign (-)
>>> atom useflag1 -useflag2 useflag3
"""
if os.path.exists( self.fname ):
f = open(self.fname, 'rb')
for line in f:
if line.startswith('#'):
continue
split = line.split()
if len(split):
atom = split[0] # This is an extra assignment, but I think it makes the code more explicit in what goes into the dict
self.data[atom] = None # we only care about keys in the dict, basically abusing it as a list
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