Refactoed config schema storage: store data in YAML; generate compact version records
This commit is contained in:
Maxim Kulkin
parent
a2cfa5bcbf
commit
5637f040f6
@ -14,3 +14,4 @@ recordtype==1.1
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paramiko==1.11.0
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oslo.config==1.2.1
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requests==1.2.0
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PyYAML==3.10
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@ -138,7 +138,7 @@ class OpenstackComponent(Service):
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# Apply defaults
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if schema:
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for parameter in filter(lambda p: p.default, schema.parameters):
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if parameter.section == 'DEFAULT':
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if not parameter.section or parameter.section == 'DEFAULT':
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config.set_default(parameter.name, parameter.default)
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else:
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config.set_default(
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173
rubick/schema.py
173
rubick/schema.py
@ -1,5 +1,7 @@
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from contextlib import contextmanager
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import re
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import os.path
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import yaml
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from rubick.common import Issue, MarkedIssue, Mark, Version, find, index
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from rubick.exceptions import RubickException
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@ -9,67 +11,8 @@ class SchemaError(RubickException):
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pass
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class SchemaVersionRecord(object):
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# checkpoint's data is version number
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def __init__(self, version, checkpoint):
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super(SchemaVersionRecord, self).__init__()
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self.version = Version(version)
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self.checkpoint = checkpoint
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self.adds = []
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self.removals = []
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self._current_section = 'DEFAULT'
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def __repr__(self):
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return (
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'<SchemaVersionRecord %s%s>' % (
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self.version, ' (checkpoint)' if self.checkpoint else '')
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)
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def __cmp__(self, other):
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return self.version.__cmp__(other.version)
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def section(self, name):
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self._current_section = name
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def param(self, *args, **kwargs):
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if not 'section' in kwargs and self._current_section:
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kwargs['section'] = self._current_section
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self.adds.append(ConfigParameterSchema(*args, **kwargs))
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def remove_param(self, name):
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self.removals.append(name)
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class SchemaBuilder(object):
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def __init__(self, data):
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super(SchemaBuilder, self).__init__()
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self.data = data
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@contextmanager
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def version(self, version, checkpoint=False):
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version_record = SchemaVersionRecord(version, checkpoint)
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yield version_record
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self.data.append(version_record)
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self.data.sort()
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class ConfigSchemaRegistry:
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__schemas = {}
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@classmethod
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def register_schema(self, project, configname=None):
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if not configname:
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configname = '%s.conf' % project
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fullname = '%s/%s' % (project, configname)
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if fullname not in self.__schemas:
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self.__schemas[fullname] = []
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return SchemaBuilder(self.__schemas[fullname])
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db_path = os.path.join(os.path.dirname(__file__), 'schemas')
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@classmethod
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def get_schema(self, project, version, configname=None):
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@ -78,26 +21,47 @@ class ConfigSchemaRegistry:
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fullname = '%s/%s' % (project, configname)
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version = Version(version)
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if not fullname in self.__schemas:
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path = os.path.join(self.db_path, project, configname + '.yml')
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if not os.path.exists(path):
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return None
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records = self.__schemas[fullname]
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with open(path) as f:
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records = yaml.load(f.read())
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i = len(records) - 1
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# Find latest checkpoint prior given version
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while i >= 0 and not (records[i].checkpoint
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and records[i].version <= version):
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while i >= 0 and not (records[i].get('checkpoint', False)
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and Version(records[i]['version']) <= version):
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i -= 1
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if i < 0:
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return None
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if Version(records[0]['version']) > version:
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# Reached the earliest record yet haven't found version
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return None
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# Haven't found checkpoint but yearliest version is less than given
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# Assuming first record is checkpoint
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i = 0
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parameters = []
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seen_parameters = set()
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last_version = None
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while i < len(records) and records[i].version <= version:
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last_version = records[i].version
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for param in records[i].adds:
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while i < len(records) and Version(records[i]['version']) <= version:
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last_version = records[i]['version']
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for param_data in records[i].get('added', []):
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name = param_data['name']
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section = None
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if '.' in name:
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section, name = name.split('.', 1)
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param = ConfigParameterSchema(
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name, param_data['type'], section=section,
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default=param_data.get('default', None),
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description=param_data.get('help', None),
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required=param_data.get('required', False),
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deprecation_message=param_data.get('deprecated', None))
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if param.name in seen_parameters:
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old_param_index = index(
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parameters,
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@ -107,13 +71,13 @@ class ConfigSchemaRegistry:
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else:
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parameters.append(param)
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seen_parameters.add(param.name)
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for param_name in records[i].removals:
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for param_name in records[i].get('removed', []):
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param_index = index(
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parameters,
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lambda p: p.name == param_name)
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if index != -1:
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parameters.pop(param_index)
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seen_parameters.remove(param_name)
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seen_parameters.discard(param_name)
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i += 1
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return ConfigSchema(fullname, last_version, 'ini', parameters)
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@ -170,14 +134,18 @@ class ConfigParameterSchema:
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class TypeValidatorRegistry:
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__validators = {}
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__default_validator = None
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@classmethod
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def register_validator(self, type_name, type_validator):
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def register_validator(self, type_name, type_validator, default=False):
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self.__validators[type_name] = type_validator
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if default:
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self.__default_validator = type_name
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@classmethod
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def get_validator(self, name):
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return self.__validators[name]
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return self.__validators.get(
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name, self.__validators[self.__default_validator])
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class SchemaIssue(Issue):
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@ -195,21 +163,28 @@ class InvalidValueError(MarkedIssue):
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class TypeValidator(object):
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def __init__(self, f):
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def __init__(self, base_type, f):
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super(TypeValidator, self).__init__()
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self.base_type = base_type
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self.f = f
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def validate(self, value):
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if value is None:
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return value
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return getattr(self, 'f')(value)
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def type_validator(name, **kwargs):
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def type_validator(name, base_type=None, default=False, **kwargs):
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if not base_type:
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base_type = name
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def wrap(fn):
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def wrapped(s):
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return fn(s, **kwargs)
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o = TypeValidator(wrapped)
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TypeValidatorRegistry.register_validator(name, o)
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o = TypeValidator(base_type, wrapped)
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TypeValidatorRegistry.register_validator(name, o, default=default)
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return fn
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return wrap
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@ -219,6 +194,9 @@ def isissue(o):
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@type_validator('boolean')
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def validate_boolean(s):
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if isinstance(s, bool):
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return s
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s = s.lower()
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if s == 'true':
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return True
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@ -325,8 +303,8 @@ def validate_host_label(s):
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return s
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@type_validator('host')
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@type_validator('host_address')
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@type_validator('host', base_type='string')
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@type_validator('host_address', base_type='string')
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def validate_host_address(s):
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result = validate_ipv4_address(s)
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if not isissue(result):
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@ -348,13 +326,13 @@ def validate_host_address(s):
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return '.'.join(labels)
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@type_validator('network')
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@type_validator('network_address')
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@type_validator('network', base_type='string')
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@type_validator('network_address', base_type='string')
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def validate_network_address(s):
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return validate_ipv4_network(s)
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@type_validator('host_and_port')
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@type_validator('host_and_port', base_type='string')
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def validate_host_and_port(s, default_port=None):
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parts = s.strip().split(':', 2)
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@ -374,15 +352,18 @@ def validate_host_and_port(s, default_port=None):
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return (host_address, port)
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@type_validator('string')
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@type_validator('list')
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@type_validator('multi')
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@type_validator('string', base_type='string', default=True)
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@type_validator('list', base_type='list')
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@type_validator('multi', base_type='multi')
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def validate_string(s):
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return s
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@type_validator('integer')
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def validate_integer(s, min=None, max=None):
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if isinstance(s, int):
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return s
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leading_whitespace_len = 0
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while leading_whitespace_len < len(s) \
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and s[leading_whitespace_len].isspace():
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@ -419,16 +400,22 @@ def validate_integer(s, min=None, max=None):
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@type_validator('float')
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def validate_float(s):
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if isinstance(s, float):
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return s
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# TODO: Implement proper validation
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return float(s)
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@type_validator('port')
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@type_validator('port', base_type='integer')
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def validate_port(s, min=1, max=65535):
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return validate_integer(s, min=min, max=max)
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def validate_list(s, element_type):
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if isinstance(s, list):
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return s
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element_type_validator = TypeValidatorRegistry.get_validator(element_type)
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if not element_type_validator:
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return SchemaIssue('Invalid element type "%s"' % element_type)
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@ -458,13 +445,16 @@ def validate_list(s, element_type):
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return result
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@type_validator('string_list')
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@type_validator('string_list', base_type='list')
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def validate_string_list(s):
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return validate_list(s, element_type='string')
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@type_validator('string_dict')
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@type_validator('string_dict', base_type='multi')
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def validate_dict(s, element_type='string'):
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if isinstance(s, dict):
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return s
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element_type_validator = TypeValidatorRegistry.get_validator(element_type)
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if not element_type_validator:
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return SchemaIssue('Invalid element type "%s"' % element_type)
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@ -500,7 +490,7 @@ def validate_dict(s, element_type='string'):
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return result
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@type_validator('rabbitmq_bind')
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@type_validator('rabbitmq_bind', base_type='string')
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def validate_rabbitmq_bind(s):
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m = re.match('\d+', s)
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if m:
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@ -527,12 +517,15 @@ def validate_rabbitmq_bind(s):
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def validate_rabbitmq_list(s, element_type):
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if isinstance(s, list):
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return s
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if not (s.startswith('[') and s.endswith(']')):
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return SchemaIssue('List should be surrounded by [ and ]')
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return validate_list(s[1:-1], element_type=element_type)
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@type_validator('rabbitmq_bind_list')
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@type_validator('rabbitmq_bind_list', base_type='list')
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def validate_rabbitmq_bind_list(s):
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return validate_rabbitmq_list(s, element_type='rabbitmq_bind')
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@ -8,6 +8,8 @@ from copy import copy
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from oslo.config import cfg
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from rubick.schemas.yaml_utils import yaml_string, yaml_value
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def identity(x):
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return x
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@ -77,11 +79,11 @@ class YamlSchemaWriter(object):
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if self._current_section and self._current_section != 'DEFAULT':
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fullname = '%s.%s' % (self._current_section, name)
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self.file.write(" - name: %s\n" % fullname)
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self.file.write(" type: %s\n" % type)
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self.file.write(" default: %s\n" % repr(default_value))
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self.file.write(" - name: %s\n" % yaml_string(fullname, allowSimple=True))
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self.file.write(" type: %s\n" % yaml_string(type, allowSimple=True))
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self.file.write(" default: %s\n" % yaml_value(default_value))
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if description:
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self.file.write(" help: %s\n" % repr(description))
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self.file.write(" help: %s\n" % yaml_string(description))
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self.file.write("\n")
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237
rubick/schemas/generator.py
Executable file
237
rubick/schemas/generator.py
Executable file
@ -0,0 +1,237 @@
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import glob
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import os.path
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import logging
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from collections import OrderedDict
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import yaml
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from rubick.common import index, Version, Issue
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from rubick.schema import TypeValidatorRegistry as TypeRegistry
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from rubick.schemas.yaml_utils import yaml_string, yaml_value
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DIFF_THRESHOLD=0.5
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logger = logging.getLogger('rubick.schemas.generator')
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def yaml_dump_schema_records(records):
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lines = []
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for record in records:
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if len(record['added']) == 0 and len(record['removed']) == 0:
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continue
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lines.append('- version: %s' % yaml_string(str(record['version'])))
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if 'checkpoint' in record:
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lines.append(' checkpoint: %s' % yaml_value(record['checkpoint']))
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if 'added' in record and len(record['added']) > 0:
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lines.append(' added:')
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for param in record['added']:
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lines.append('')
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lines.append(' - name: %s' % yaml_string(param['name'], allowSimple=True))
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lines.append(' type: %s' % yaml_string(param['type'], allowSimple=True))
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if 'default' in param:
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lines.append(' default: %s' % yaml_value(param['default']))
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if 'help' in param:
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lines.append(' help: %s' % yaml_string(param['help']))
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extra_data = [k for k in param.keys()
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if k not in ['name', 'type', 'default', 'help']]
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for attr in extra_data:
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lines.append(' %s: %s' % (attr, yaml_value(param[attr])))
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if 'removed' in record and len(record['removed']) > 0:
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lines.append(' removed:')
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for removed in record['removed']:
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lines.append(' - %s' % yaml_string(removed, allowSimple=True))
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lines.append('')
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lines.append('# ====================================================')
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lines.append('')
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return "\n".join(lines)
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def generate_project_schema(project):
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logger.info('Processing project %s' % project)
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project_path = os.path.join(os.path.dirname(__file__), project)
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files = glob.glob(os.path.join(project_path, '*.yml'))
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if files == []:
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logger.info("Found no YAML files in project %s. Skipping it" % project)
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return
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x = index(files, lambda f: f.endswith('.conf.yml'))
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if x != -1:
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database_file = files[x]
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del files[x]
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else:
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database_file = os.path.join(project_path, project+'.conf.yml')
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schema_records = []
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if os.path.exists(database_file):
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logger.debug("Processing database file %s" % database_file)
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with open(database_file) as f:
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schema_records.extend(yaml.load(f.read()))
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schema_versions = []
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for version_file in files:
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logger.debug("Processing version file %s" % version_file)
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with open(version_file) as f:
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schema_versions.append(yaml.load(f.read()))
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schema_versions = sorted(schema_versions, key=lambda s: s['version'])
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parameters = OrderedDict()
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for schema in schema_versions:
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added = []
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seen = set()
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logger.debug('Processing schema version %s' % schema['version'])
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for param in schema['parameters']:
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prev_param = parameters.get(param['name'], None)
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if not prev_param:
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logger.debug('Parameter %s does not exist yet, adding it as new' % param['name'])
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param['comment'] = 'New param'
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added.append(param)
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else:
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seen.add(param['name'])
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if param['type'] != prev_param['type']:
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validator = TypeRegistry.get_validator(prev_param['type'])
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if param['type'] == validator.base_type:
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param['type'] = prev_param['type']
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if 'default' in param and param['default'] is not None:
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value = validator.validate(param['default'])
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if not isinstance(value, Issue):
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param['default'] = value
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else:
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logger.error("In project '%s' version %s default value for parameter '%s' is not valid value of type %s: %s" %
|
||||
(project, schema['version'], param['name'], param['type'], repr(param['default'])))
|
||||
else:
|
||||
logger.debug('Parameter %s type has changed from %s to %s' %
|
||||
(param['name'], prev_param['type'], param['type']))
|
||||
param['comment'] = 'Type has changed'
|
||||
added.append(param)
|
||||
continue
|
||||
|
||||
if param.get('default', None) != prev_param.get('default', None):
|
||||
logger.debug('Parameter %s default value has changed from %s to %s' %
|
||||
(param['name'], prev_param['default'], param['default']))
|
||||
param['comment'] = 'Default value has changed'
|
||||
added.append(param)
|
||||
continue
|
||||
|
||||
if param.get('help', None) != prev_param.get('help', None):
|
||||
param['comment'] = 'Help string has changed'
|
||||
added.append(param)
|
||||
|
||||
removed = [name for name in parameters.keys() if name not in seen]
|
||||
if len(removed) > 0:
|
||||
logger.debug('Following parameters from previous schema version are not present in current version, marking as removed: %s' % ','.join(removed))
|
||||
|
||||
# Decide either to use full schema update or incremental
|
||||
changes_count = sum(map(len, [added, removed]))
|
||||
|
||||
logger.debug('Found %d change(s) from previous version schema' % changes_count)
|
||||
|
||||
if changes_count > int(len(parameters)*DIFF_THRESHOLD):
|
||||
logger.debug('Using full schema update')
|
||||
|
||||
new_parameters = parameters.copy()
|
||||
for param in added:
|
||||
new_parameters[param['name']] = param
|
||||
for name in removed:
|
||||
del new_parameters[name]
|
||||
|
||||
new_schema_record = dict(version=schema['version'],
|
||||
added=new_parameters.values(),
|
||||
removed=[],
|
||||
checkpoint=True)
|
||||
else:
|
||||
logger.debug('Using incremental schema update')
|
||||
|
||||
new_schema_record = dict(version=schema['version'],
|
||||
added=added, removed=removed)
|
||||
|
||||
# Place schema record either replacing existing one or appending as new
|
||||
old_schema_record_idx = index(
|
||||
schema_records, lambda r: r['version'] == new_schema_record['version'])
|
||||
|
||||
if old_schema_record_idx != -1:
|
||||
old_schema_record = schema_records[old_schema_record_idx]
|
||||
# Collect information from existing records
|
||||
old_schema_parameters = {}
|
||||
for param in old_schema_record.get('added', []):
|
||||
old_schema_parameters[param['name']] = param
|
||||
|
||||
for param in added:
|
||||
old_param = old_schema_parameters.get(param['name'], None)
|
||||
if not old_param:
|
||||
continue
|
||||
|
||||
extra_data = [(k, v) for k, v in old_param.items()
|
||||
if k not in ['name', 'type', 'default', 'help']]
|
||||
param.update(extra_data)
|
||||
|
||||
validator = TypeRegistry.get_validator(old_param['type'])
|
||||
if param['type'] not in [old_param['type'], validator.base_type]:
|
||||
param['comment'] = 'Type has changed'
|
||||
# Type has changed, enforcing old type to prevent accidental data loss
|
||||
param['type'] = old_param['type']
|
||||
if 'default' in old_param:
|
||||
param['default'] = old_param['default']
|
||||
|
||||
if 'default' in param:
|
||||
if param['default'] is not None:
|
||||
value = validator.validate(old_param['default'])
|
||||
if not isinstance(value, Issue):
|
||||
param['default'] = value
|
||||
else:
|
||||
logger.error("In project '%s' version %s default value for parameter '%s' is not valid value of type %s: %s" %
|
||||
(project, schema['version'], param['name'], param['type'], repr(param['default'])))
|
||||
|
||||
if 'default' in param:
|
||||
if param['default'] != old_param.get('default', None):
|
||||
param['comment'] = 'Default value has changed'
|
||||
continue
|
||||
|
||||
logger.debug('Replacing schema record %s' % repr(new_schema_record))
|
||||
schema_records[old_schema_record_idx] = new_schema_record
|
||||
else:
|
||||
logger.debug('Appending schema record %s' % repr(new_schema_record))
|
||||
schema_records.append(new_schema_record)
|
||||
|
||||
# Update parameter info
|
||||
for param in new_schema_record.get('added', []):
|
||||
parameters[param['name']] = param
|
||||
|
||||
for name in new_schema_record.get('removed', []):
|
||||
del parameters[name]
|
||||
|
||||
|
||||
schema_records = sorted(schema_records,
|
||||
key=lambda r: Version(r['version']))
|
||||
|
||||
with open(database_file, 'w') as f:
|
||||
f.write(yaml_dump_schema_records(schema_records))
|
||||
|
||||
|
||||
def main():
|
||||
logging.basicConfig(level=logging.INFO)
|
||||
for project_path in glob.glob(os.path.join(os.path.dirname(__file__), '*')):
|
||||
if not os.path.isdir(project_path):
|
||||
continue
|
||||
|
||||
generate_project_schema(os.path.basename(project_path))
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
21
rubick/schemas/yaml_utils.py
Normal file
21
rubick/schemas/yaml_utils.py
Normal file
@ -0,0 +1,21 @@
|
||||
def yaml_string(s, allowSimple=False):
|
||||
if "'" in s:
|
||||
return '"%s"' % s.replace('\\', '\\\\').replace('"', '\\"')
|
||||
else:
|
||||
if not allowSimple or any([c in s for c in " :,"]):
|
||||
return "'%s'" % s
|
||||
else:
|
||||
return s
|
||||
|
||||
|
||||
def yaml_value(x):
|
||||
if x is None:
|
||||
return '~'
|
||||
elif x == True:
|
||||
return 'true'
|
||||
elif x == False:
|
||||
return 'false'
|
||||
elif isinstance(x, str):
|
||||
return yaml_string(x)
|
||||
else:
|
||||
return repr(x)
|
||||
Loading…
x
Reference in New Issue
Block a user