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import os, os.path, re, sys, textwrap
__all__ = [
'ConfigParser',
'ConfigReaderCore',
]
class SchemaItemBoolean(object):
def __call__(self, i):
i = i.strip().lower()
if i in ("true", "1"):
return True
if i in ("false", "0"):
return False
raise Error
class SchemaItemList(object):
def __init__(self, type = "\s+"):
self.type = type
def __call__(self, i):
i = i.strip()
if not i:
return []
return [j.strip() for j in re.split(self.type, i)]
class ConfigReaderCore(dict):
config_name = "defines"
schemas = {
'base': {
'arches': SchemaItemList(),
'enabled': SchemaItemBoolean(),
'featuresets': SchemaItemList(),
'flavours': SchemaItemList(),
'modules': SchemaItemBoolean(),
},
'image': {
'configs': SchemaItemList(),
'initramfs': SchemaItemBoolean(),
'initramfs-generators': SchemaItemList(),
},
'relations': {
},
'xen': {
'dom0-support': SchemaItemBoolean(),
'versions': SchemaItemList(),
}
}
def __init__(self, dirs = []):
self._dirs = dirs
self._read_base()
def _read_arch(self, arch):
config = ConfigParser(self.schemas)
config.read(self.get_files("%s/%s" % (arch, self.config_name)))
featuresets = config['base',].get('featuresets', [])
flavours = config['base',].get('flavours', [])
for section in iter(config):
if section[0] in featuresets:
real = (section[-1], arch, section[0])
elif len(section) > 1:
real = (section[-1], arch, None) + section[:-1]
else:
real = (section[-1], arch) + section[:-1]
s = self.get(real, {})
s.update(config[section])
self[tuple(real)] = s
for featureset in featuresets:
self._read_arch_featureset(arch, featureset)
if flavours:
base = self['base', arch]
featuresets.insert(0, 'none')
base['featuresets'] = featuresets
del base['flavours']
self['base', arch] = base
self['base', arch, 'none'] = {'flavours': flavours, 'implicit-flavour': True}
def _read_arch_featureset(self, arch, featureset):
config = ConfigParser(self.schemas)
config.read(self.get_files("%s/%s/%s" % (arch, featureset, self.config_name)))
flavours = config['base',].get('flavours', [])
for section in iter(config):
real = (section[-1], arch, featureset) + section[:-1]
s = self.get(real, {})
s.update(config[section])
self[tuple(real)] = s
def _read_base(self):
config = ConfigParser(self.schemas)
config.read(self.get_files(self.config_name))
arches = config['base',]['arches']
featuresets = config['base',]['featuresets']
for section in iter(config):
if section[0].startswith('featureset-'):
real = (section[-1], None, section[0].lstrip('featureset-'))
else:
real = (section[-1],) + section[1:]
self[real] = config[section]
for arch in arches:
self._read_arch(arch)
for featureset in featuresets:
self._read_featureset(featureset)
def _read_featureset(self, featureset):
config = ConfigParser(self.schemas)
config.read(self.get_files("featureset-%s/%s" % (featureset, self.config_name)))
for section in iter(config):
real = (section[-1], None, featureset)
s = self.get(real, {})
s.update(config[section])
self[real] = s
def get_files(self, name):
return [os.path.join(i, name) for i in self._dirs if i]
def merge(self, section, arch = None, featureset = None, flavour = None):
ret = {}
ret.update(self.get((section,), {}))
if featureset:
ret.update(self.get((section, None, featureset), {}))
if arch:
ret.update(self.get((section, arch), {}))
if arch and featureset:
ret.update(self.get((section, arch, featureset), {}))
if arch and featureset and flavour:
ret.update(self.get((section, arch, None, flavour), {}))
ret.update(self.get((section, arch, featureset, flavour), {}))
return ret
class ConfigParser(object):
__slots__ = '_config', 'schemas'
def __init__(self, schemas):
self.schemas = schemas
from ConfigParser import RawConfigParser
self._config = config = RawConfigParser()
def __getitem__(self, key):
return self._convert()[key]
def __iter__(self):
return iter(self._convert())
def __str__(self):
return '<%s(%s)>' % (self.__class__.__name__, self._convert())
def _convert(self):
ret = {}
for section in self._config.sections():
data = {}
for key, value in self._config.items(section):
data[key] = value
s1 = section.split('_')
if s1[-1] in self.schemas:
ret[tuple(s1)] = self.SectionSchema(data, self.schemas[s1[-1]])
else:
ret[(section,)] = self.Section(data)
return ret
def keys(self):
return self._convert().keys()
def read(self, data):
return self._config.read(data)
class Section(dict):
def __init__(self, data):
super(ConfigParser.Section, self).__init__(data)
def __str__(self):
return '<%s(%s)>' % (self.__class__.__name__, self._data)
class SectionSchema(Section):
__slots__ = ()
def __init__(self, data, schema):
for key in data.keys():
try:
data[key] = schema[key](data[key])
except KeyError: pass
super(ConfigParser.SectionSchema, self).__init__(data)
if __name__ == '__main__':
import sys
config = ConfigReaderCore(['debian/config'])
sections = config.keys()
sections.sort()
for section in sections:
print "[%s]" % (section,)
items = config[section]
items_keys = items.keys()
items_keys.sort()
for item in items:
print "%s: %s" % (item, items[item])
print
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