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-rw-r--r--debian/lib/python/debian_linux/config.py256
1 files changed, 256 insertions, 0 deletions
diff --git a/debian/lib/python/debian_linux/config.py b/debian/lib/python/debian_linux/config.py
new file mode 100644
index 000000000..37e3764ab
--- /dev/null
+++ b/debian/lib/python/debian_linux/config.py
@@ -0,0 +1,256 @@
+import collections
+import os
+import os.path
+import pickle
+import re
+import sys
+
+from configparser import RawConfigParser
+
+__all__ = [
+ 'ConfigCoreDump',
+ 'ConfigCoreHierarchy',
+ 'ConfigParser',
+]
+
+
+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 ValueError
+
+
+class SchemaItemInteger(object):
+ def __call__(self, i):
+ return int(i.strip(), 0)
+
+
+class SchemaItemList(object):
+ def __init__(self, type=r"\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)]
+
+
+# Using OrderedDict instead of dict makes the pickled config reproducible
+class ConfigCore(collections.OrderedDict):
+ def get_merge(self, section, arch, featureset, flavour, key, default=None):
+ temp = []
+
+ if arch and featureset and flavour:
+ temp.append(self.get((section, arch, featureset, flavour), {})
+ .get(key))
+ temp.append(self.get((section, arch, None, flavour), {}).get(key))
+ if arch and featureset:
+ temp.append(self.get((section, arch, featureset), {}).get(key))
+ if arch:
+ temp.append(self.get((section, arch), {}).get(key))
+ if featureset:
+ temp.append(self.get((section, None, featureset), {}).get(key))
+ temp.append(self.get((section,), {}).get(key))
+
+ ret = []
+
+ for i in temp:
+ if i is None:
+ continue
+ elif isinstance(i, (list, tuple)):
+ ret.extend(i)
+ elif ret:
+ # TODO
+ return ret
+ else:
+ return i
+
+ return ret or default
+
+ 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
+
+ def dump(self, fp):
+ pickle.dump(self, fp, 0)
+
+
+class ConfigCoreDump(object):
+ def __new__(self, fp):
+ return pickle.load(fp)
+
+
+class ConfigCoreHierarchy(object):
+ schema_base = {
+ 'base': {
+ 'arches': SchemaItemList(),
+ 'enabled': SchemaItemBoolean(),
+ 'featuresets': SchemaItemList(),
+ 'flavours': SchemaItemList(),
+ },
+ }
+
+ def __new__(cls, schema, dirs=[]):
+ schema_complete = cls.schema_base.copy()
+ for key, value in schema.items():
+ schema_complete.setdefault(key, {}).update(value)
+ return cls.Reader(dirs, schema_complete)()
+
+ class Reader(object):
+ config_name = "defines"
+
+ def __init__(self, dirs, schema):
+ self.dirs, self.schema = dirs, schema
+
+ def __call__(self):
+ ret = ConfigCore()
+ self.read(ret)
+ return ret
+
+ def get_files(self, *dirs):
+ dirs = list(dirs)
+ dirs.append(self.config_name)
+ return (os.path.join(i, *dirs) for i in self.dirs if i)
+
+ def read_arch(self, ret, arch):
+ config = ConfigParser(self.schema)
+ config.read(self.get_files(arch))
+
+ 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 = ret.get(real, {})
+ s.update(config[section])
+ ret[tuple(real)] = s
+
+ for featureset in featuresets:
+ self.read_arch_featureset(ret, arch, featureset)
+
+ if flavours:
+ base = ret['base', arch]
+ featuresets.insert(0, 'none')
+ base['featuresets'] = featuresets
+ del base['flavours']
+ ret['base', arch] = base
+ ret['base', arch, 'none'] = {'flavours': flavours,
+ 'implicit-flavour': True}
+
+ def read_arch_featureset(self, ret, arch, featureset):
+ config = ConfigParser(self.schema)
+ config.read(self.get_files(arch, featureset))
+
+ for section in iter(config):
+ real = (section[-1], arch, featureset) + section[:-1]
+ s = ret.get(real, {})
+ s.update(config[section])
+ ret[tuple(real)] = s
+
+ def read(self, ret):
+ config = ConfigParser(self.schema)
+ config.read(self.get_files())
+
+ arches = config['base', ]['arches']
+ featuresets = config['base', ].get('featuresets', [])
+
+ for section in iter(config):
+ if section[0].startswith('featureset-'):
+ real = (section[-1], None, section[0][11:])
+ else:
+ real = (section[-1],) + section[1:]
+ ret[real] = config[section]
+
+ for arch in arches:
+ self.read_arch(ret, arch)
+ for featureset in featuresets:
+ self.read_featureset(ret, featureset)
+
+ def read_featureset(self, ret, featureset):
+ config = ConfigParser(self.schema)
+ config.read(self.get_files('featureset-%s' % featureset))
+
+ for section in iter(config):
+ real = (section[-1], None, featureset)
+ s = ret.get(real, {})
+ s.update(config[section])
+ ret[real] = s
+
+
+class ConfigParser(object):
+ __slots__ = '_config', 'schemas'
+
+ def __init__(self, schemas):
+ self.schemas = schemas
+
+ self._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
+ section_list = section.split('_')
+ section_base = section_list[-1]
+ if section_base in self.schemas:
+ section_ret = tuple(section_list)
+ data = self._convert_one(self.schemas[section_base], data)
+ else:
+ section_ret = (section, )
+ ret[section_ret] = data
+ return ret
+
+ def _convert_one(self, schema, data):
+ ret = {}
+ for key, value in data.items():
+ if key in schema:
+ value = schema[key](value)
+ ret[key] = value
+ return ret
+
+ def keys(self):
+ return self._convert().keys()
+
+ def read(self, data):
+ return self._config.read(data)
+
+
+if __name__ == '__main__':
+ sys.path.append('debian/lib/python')
+ config = ConfigCoreDump(open('debian/config.defines.dump', 'rb'))
+ for section, items in sorted(config.items(),
+ key=(lambda a: tuple(i or '' for i in a[0]))):
+ print(u"[%s]" % (section,))
+ for item, value in sorted(items.items()):
+ print(u"%s: %s" % (item, value))
+ print()