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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 DataLoader(object):
def load(self):
"""
Function to do the actual work of a Loader
"""
pass
class AtomFileLoader(DataLoader):
"""
Class to load data from a file full of atoms one per line
>>> atom1
>>> atom2
>>> atom3
becomes ['atom1', 'atom2', 'atom3']
"""
_recursive = False
def __init__(self, filename):
DataLoader.__init__(self)
self.fname = filename
def load(self):
data = {}
errors = {}
line_count = 0
file_list = None
if self._recursive and os.path.isdir(self.fname):
for root, dirs, files in os.walk(self.fname):
if 'CVS' in dirs:
dirs.remove('CVS')
files = filter(files,startswith('.'))
file_list.append([f.join(root,f) for f in files])
else:
file_list = [self.fname]
for file in file_list:
f = open(file, 'rb')
for line in f:
line_count = line_count + 1
if line.startswith('#'):
continue
split = line.strip().split()
if not len(split):
errors.setdefault(self.fname,[]).append(
"Malformed data at line: %s, data: %s"
% (line_count, split))
key = split[0]
data[key] = None
return (data,errors)
class KeyListFileLoader(DataLoader):
"""
Class to load data from a file full of key [list] tuples
>>>>key foo1 foo2 foo3
becomes
{'key':['foo1','foo2','foo3']}
"""
_recursive = False
def __init__(self, filename):
DataLoader.__init__(self)
self.fname = filename
def load(self):
data = {}
errors = {}
line_count = 0
file_list = None
if self._recursive and os.path.isdir(self.fname):
for root, dirs, files in os.walk(self.fname):
if 'CVS' in dirs:
dirs.remove('CVS')
files = filter(files,startswith('.'))
file_list.append([f.join(root,f) for f in files])
else:
file_list = [self.fname]
for file in file_list:
f = open(file, 'rb')
for line in f:
line_count = line_count + 1
if line.startswith('#'):
continue
split = line.strip().split()
if len(split) < 2:
errors.setdefault(self.fname,[]).append(
"Malformed data at line: %s, data: %s"
% (line_count, split))
key = split[0]
value = split[1:]
if key in data:
data[key].append(value)
else:
data[key] = value
return (data,errors)
class KeyValuePairFileLoader(DataLoader):
"""
Class to load data from a file full of key=value pairs
>>>>key=value
>>>>foo=bar
becomes:
{'key':'value',
'foo':'bar'}
"""
_recursive = False
def __init__(self, filename):
DataLoader.__init__(self)
self.fname = filename
def load(self):
"""
Return the {source: {key: value}} pairs from a file
Return the {source: [list of errors] from a load
@param recursive: If set and self.fname is a directory;
load all files in self.fname
@type: Boolean
@rtype: tuple
@returns:
Returns (data,errors), both may be empty dicts or populated.
"""
DataLoader.load(self)
data = {}
errors = {}
line_count = 0
file_list = None
if self._recursive and os.path.isdir(self.fname):
for root, dirs, files in os.walk(self.fname):
if 'CVS' in dirs:
dirs.remove('CVS')
files = filter(files,startswith('.'))
file_list.append([f.join(root,f) for f in files])
else:
file_list = [self.fname]
for file in file_list:
f = open(file, 'rb')
for line in f:
line_count = line_count + 1 # Increment line count
if line.startswith('#'):
continue
split = line.strip().split('=')
if len(split) < 2:
errors.setdefault(self.fname,[]).append(
"Malformed data at line: %s, data %s"
% (line_count, split))
key = split[0]
value = split[1:]
if key in data:
data[key].append(value)
else:
data[key] = value
return (data,errors)
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 __init__(self, loader):
self._loader = loader
def load(self):
self.data, self.errors = self._loader.load()
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.
"""
default_loader = KeyListFileLoader
def __init__(self, filename):
self.loader = self.default_loader(filename)
PackageKeywords.__init__(self, self.loader)
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 __init__(self, loader):
self._loader = loader
def load( self):
self.data, self.errors = self._loader.load()
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.
"""
default_loader = KeyListFileLoader
def __init__(self, filename):
self.loader = self.default_loader(filename)
PackageUse.__init__(self, self.loader)
class PackageMask(UserDict):
"""
A base class for Package.mask functionality
"""
data = {}
def __init__(self, loader):
self._loader = loader
def load(self):
self.data, self.errors = self._loader.load()
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
"""
default_loader = KeyValuePairFileLoader
def __init__(self, filename):
self.loader = self.default_loader(filename)
PackageMask.__init__(self, self.loader)
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