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metadata.py
# -*- coding: utf-8 -*- # # Copyright (C) 2012 The Python Software Foundation. # See LICENSE.txt and CONTRIBUTORS.txt. # """Implementation of the Metadata for Python packages PEPs. Supports all metadata formats (1.0, 1.1, 1.2, and 2.0 experimental). """ from __future__ import unicode_literals import codecs from email import message_from_file import json import logging import re from . import DistlibException, __version__ from .compat import StringIO, string_types, text_type from .markers import interpret from .util import extract_by_key, get_extras from .version import get_scheme, PEP440_VERSION_RE logger = logging.getLogger(__name__) class MetadataMissingError(DistlibException): """A required metadata is missing""" class MetadataConflictError(DistlibException): """Attempt to read or write metadata fields that are conflictual.""" class MetadataUnrecognizedVersionError(DistlibException): """Unknown metadata version number.""" class MetadataInvalidError(DistlibException): """A metadata value is invalid""" # public API of this module __all__ = ['Metadata', 'PKG_INFO_ENCODING', 'PKG_INFO_PREFERRED_VERSION'] # Encoding used for the PKG-INFO files PKG_INFO_ENCODING = 'utf-8' # preferred version. Hopefully will be changed # to 1.2 once PEP 345 is supported everywhere PKG_INFO_PREFERRED_VERSION = '1.1' _LINE_PREFIX_1_2 = re.compile('\n \|') _LINE_PREFIX_PRE_1_2 = re.compile('\n ') _241_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform', 'Summary', 'Description', 'Keywords', 'Home-page', 'Author', 'Author-email', 'License') _314_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform', 'Supported-Platform', 'Summary', 'Description', 'Keywords', 'Home-page', 'Author', 'Author-email', 'License', 'Classifier', 'Download-URL', 'Obsoletes', 'Provides', 'Requires') _314_MARKERS = ('Obsoletes', 'Provides', 'Requires', 'Classifier', 'Download-URL') _345_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform', 'Supported-Platform', 'Summary', 'Description', 'Keywords', 'Home-page', 'Author', 'Author-email', 'Maintainer', 'Maintainer-email', 'License', 'Classifier', 'Download-URL', 'Obsoletes-Dist', 'Project-URL', 'Provides-Dist', 'Requires-Dist', 'Requires-Python', 'Requires-External') _345_MARKERS = ('Provides-Dist', 'Requires-Dist', 'Requires-Python', 'Obsoletes-Dist', 'Requires-External', 'Maintainer', 'Maintainer-email', 'Project-URL') _426_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform', 'Supported-Platform', 'Summary', 'Description', 'Keywords', 'Home-page', 'Author', 'Author-email', 'Maintainer', 'Maintainer-email', 'License', 'Classifier', 'Download-URL', 'Obsoletes-Dist', 'Project-URL', 'Provides-Dist', 'Requires-Dist', 'Requires-Python', 'Requires-External', 'Private-Version', 'Obsoleted-By', 'Setup-Requires-Dist', 'Extension', 'Provides-Extra') _426_MARKERS = ('Private-Version', 'Provides-Extra', 'Obsoleted-By', 'Setup-Requires-Dist', 'Extension') _ALL_FIELDS = set() _ALL_FIELDS.update(_241_FIELDS) _ALL_FIELDS.update(_314_FIELDS) _ALL_FIELDS.update(_345_FIELDS) _ALL_FIELDS.update(_426_FIELDS) EXTRA_RE = re.compile(r'''extra\s*==\s*("([^"]+)"|'([^']+)')''') def _version2fieldlist(version): if version == '1.0': return _241_FIELDS elif version == '1.1': return _314_FIELDS elif version == '1.2': return _345_FIELDS elif version == '2.0': return _426_FIELDS raise MetadataUnrecognizedVersionError(version) def _best_version(fields): """Detect the best version depending on the fields used.""" def _has_marker(keys, markers): for marker in markers: if marker in keys: return True return False keys = [] for key, value in fields.items(): if value in ([], 'UNKNOWN', None): continue keys.append(key) possible_versions = ['1.0', '1.1', '1.2', '2.0'] # first let's try to see if a field is not part of one of the version for key in keys: if key not in _241_FIELDS and '1.0' in possible_versions: possible_versions.remove('1.0') if key not in _314_FIELDS and '1.1' in possible_versions: possible_versions.remove('1.1') if key not in _345_FIELDS and '1.2' in possible_versions: possible_versions.remove('1.2') if key not in _426_FIELDS and '2.0' in possible_versions: possible_versions.remove('2.0') # possible_version contains qualified versions if len(possible_versions) == 1: return possible_versions[0] # found ! elif len(possible_versions) == 0: raise MetadataConflictError('Unknown metadata set') # let's see if one unique marker is found is_1_1 = '1.1' in possible_versions and _has_marker(keys, _314_MARKERS) is_1_2 = '1.2' in possible_versions and _has_marker(keys, _345_MARKERS) is_2_0 = '2.0' in possible_versions and _has_marker(keys, _426_MARKERS) if int(is_1_1) + int(is_1_2) + int(is_2_0) > 1: raise MetadataConflictError('You used incompatible 1.1/1.2/2.0 fields') # we have the choice, 1.0, or 1.2, or 2.0 # - 1.0 has a broken Summary field but works with all tools # - 1.1 is to avoid # - 1.2 fixes Summary but has little adoption # - 2.0 adds more features and is very new if not is_1_1 and not is_1_2 and not is_2_0: # we couldn't find any specific marker if PKG_INFO_PREFERRED_VERSION in possible_versions: return PKG_INFO_PREFERRED_VERSION if is_1_1: return '1.1' if is_1_2: return '1.2' return '2.0' _ATTR2FIELD = { 'metadata_version': 'Metadata-Version', 'name': 'Name', 'version': 'Version', 'platform': 'Platform', 'supported_platform': 'Supported-Platform', 'summary': 'Summary', 'description': 'Description', 'keywords': 'Keywords', 'home_page': 'Home-page', 'author': 'Author', 'author_email': 'Author-email', 'maintainer': 'Maintainer', 'maintainer_email': 'Maintainer-email', 'license': 'License', 'classifier': 'Classifier', 'download_url': 'Download-URL', 'obsoletes_dist': 'Obsoletes-Dist', 'provides_dist': 'Provides-Dist', 'requires_dist': 'Requires-Dist', 'setup_requires_dist': 'Setup-Requires-Dist', 'requires_python': 'Requires-Python', 'requires_external': 'Requires-External', 'requires': 'Requires', 'provides': 'Provides', 'obsoletes': 'Obsoletes', 'project_url': 'Project-URL', 'private_version': 'Private-Version', 'obsoleted_by': 'Obsoleted-By', 'extension': 'Extension', 'provides_extra': 'Provides-Extra', } _PREDICATE_FIELDS = ('Requires-Dist', 'Obsoletes-Dist', 'Provides-Dist') _VERSIONS_FIELDS = ('Requires-Python',) _VERSION_FIELDS = ('Version',) _LISTFIELDS = ('Platform', 'Classifier', 'Obsoletes', 'Requires', 'Provides', 'Obsoletes-Dist', 'Provides-Dist', 'Requires-Dist', 'Requires-External', 'Project-URL', 'Supported-Platform', 'Setup-Requires-Dist', 'Provides-Extra', 'Extension') _LISTTUPLEFIELDS = ('Project-URL',) _ELEMENTSFIELD = ('Keywords',) _UNICODEFIELDS = ('Author', 'Maintainer', 'Summary', 'Description') _MISSING = object() _FILESAFE = re.compile('[^A-Za-z0-9.]+') def _get_name_and_version(name, version, for_filename=False): """Return the distribution name with version. If for_filename is true, return a filename-escaped form.""" if for_filename: # For both name and version any runs of non-alphanumeric or '.' # characters are replaced with a single '-'. Additionally any # spaces in the version string become '.' name = _FILESAFE.sub('-', name) version = _FILESAFE.sub('-', version.replace(' ', '.')) return '%s-%s' % (name, version) class LegacyMetadata(object): """The legacy metadata of a release. Supports versions 1.0, 1.1 and 1.2 (auto-detected). You can instantiate the class with one of these arguments (or none): - *path*, the path to a metadata file - *fileobj* give a file-like object with metadata as content - *mapping* is a dict-like object - *scheme* is a version scheme name """ # TODO document the mapping API and UNKNOWN default key def __init__(self, path=None, fileobj=None, mapping=None, scheme='default'): if [path, fileobj, mapping].count(None) < 2: raise TypeError('path, fileobj and mapping are exclusive') self._fields = {} self.requires_files = [] self._dependencies = None self.scheme = scheme if path is not None: self.read(path) elif fileobj is not None: self.read_file(fileobj) elif mapping is not None: self.update(mapping) self.set_metadata_version() def set_metadata_version(self): self._fields['Metadata-Version'] = _best_version(self._fields) def _write_field(self, fileobj, name, value): fileobj.write('%s: %s\n' % (name, value)) def __getitem__(self, name): return self.get(name) def __setitem__(self, name, value): return self.set(name, value) def __delitem__(self, name): field_name = self._convert_name(name) try: del self._fields[field_name] except KeyError: raise KeyError(name) def __contains__(self, name): return (name in self._fields or self._convert_name(name) in self._fields) def _convert_name(self, name): if name in _ALL_FIELDS: return name name = name.replace('-', '_').lower() return _ATTR2FIELD.get(name, name) def _default_value(self, name): if name in _LISTFIELDS or name in _ELEMENTSFIELD: return [] return 'UNKNOWN' def _remove_line_prefix(self, value): if self.metadata_version in ('1.0', '1.1'): return _LINE_PREFIX_PRE_1_2.sub('\n', value) else: return _LINE_PREFIX_1_2.sub('\n', value) def __getattr__(self, name): if name in _ATTR2FIELD: return self[name] raise AttributeError(name) # # Public API # # dependencies = property(_get_dependencies, _set_dependencies) def get_fullname(self, filesafe=False): """Return the distribution name with version. If filesafe is true, return a filename-escaped form.""" return _get_name_and_version(self['Name'], self['Version'], filesafe) def is_field(self, name): """return True if name is a valid metadata key""" name = self._convert_name(name) return name in _ALL_FIELDS def is_multi_field(self, name): name = self._convert_name(name) return name in _LISTFIELDS def read(self, filepath): """Read the metadata values from a file path.""" fp = codecs.open(filepath, 'r', encoding='utf-8') try: self.read_file(fp) finally: fp.close() def read_file(self, fileob): """Read the metadata values from a file object.""" msg = message_from_file(fileob) self._fields['Metadata-Version'] = msg['metadata-version'] # When reading, get all the fields we can for field in _ALL_FIELDS: if field not in msg: continue if field in _LISTFIELDS: # we can have multiple lines values = msg.get_all(field) if field in _LISTTUPLEFIELDS and values is not None: values = [tuple(value.split(',')) for value in values] self.set(field, values) else: # single line value = msg[field] if value is not None and value != 'UNKNOWN': self.set(field, value) self.set_metadata_version() def write(self, filepath, skip_unknown=False): """Write the metadata fields to filepath.""" fp = codecs.open(filepath, 'w', encoding='utf-8') try: self.write_file(fp, skip_unknown) finally: fp.close() def write_file(self, fileobject, skip_unknown=False): """Write the PKG-INFO format data to a file object.""" self.set_metadata_version() for field in _version2fieldlist(self['Metadata-Version']): values = self.get(field) if skip_unknown and values in ('UNKNOWN', [], ['UNKNOWN']): continue if field in _ELEMENTSFIELD: self._write_field(fileobject, field, ','.join(values)) continue if field not in _LISTFIELDS: if field == 'Description': if self.metadata_version in ('1.0', '1.1'): values = values.replace('\n', '\n ') else: values = values.replace('\n', '\n |') values = [values] if field in _LISTTUPLEFIELDS: values = [','.join(value) for value in values] for value in values: self._write_field(fileobject, field, value) def update(self, other=None, **kwargs): """Set metadata values from the given iterable `other` and kwargs. Behavior is like `dict.update`: If `other` has a ``keys`` method, they are looped over and ``self[key]`` is assigned ``other[key]``. Else, ``other`` is an iterable of ``(key, value)`` iterables. Keys that don't match a metadata field or that have an empty value are dropped. """ def _set(key, value): if key in _ATTR2FIELD and value: self.set(self._convert_name(key), value) if not other: # other is None or empty container pass elif hasattr(other, 'keys'): for k in other.keys(): _set(k, other[k]) else: for k, v in other: _set(k, v) if kwargs: for k, v in kwargs.items(): _set(k, v) def set(self, name, value): """Control then set a metadata field.""" name = self._convert_name(name) if ((name in _ELEMENTSFIELD or name == 'Platform') and not isinstance(value, (list, tuple))): if isinstance(value, string_types): value = [v.strip() for v in value.split(',')] else: value = [] elif (name in _LISTFIELDS and not isinstance(value, (list, tuple))): if isinstance(value, string_types): value = [value] else: value = [] if logger.isEnabledFor(logging.WARNING): project_name = self['Name'] scheme = get_scheme(self.scheme) if name in _PREDICATE_FIELDS and value is not None: for v in value: # check that the values are valid if not scheme.is_valid_matcher(v.split(';')[0]): logger.warning( "'%s': '%s' is not valid (field '%s')", project_name, v, name) # FIXME this rejects UNKNOWN, is that right? elif name in _VERSIONS_FIELDS and value is not None: if not scheme.is_valid_constraint_list(value): logger.warning("'%s': '%s' is not a valid version (field '%s')", project_name, value, name) elif name in _VERSION_FIELDS and value is not None: if not scheme.is_valid_version(value): logger.warning("'%s': '%s' is not a valid version (field '%s')", project_name, value, name) if name in _UNICODEFIELDS: if name == 'Description': value = self._remove_line_prefix(value) self._fields[name] = value def get(self, name, default=_MISSING): """Get a metadata field.""" name = self._convert_name(name) if name not in self._fields: if default is _MISSING: default = self._default_value(name) return default if name in _UNICODEFIELDS: value = self._fields[name] return value elif name in _LISTFIELDS: value = self._fields[name] if value is None: return [] res = [] for val in value: if name not in _LISTTUPLEFIELDS: res.append(val) else: # That's for Project-URL res.append((val[0], val[1])) return res elif name in _ELEMENTSFIELD: value = self._fields[name] if isinstance(value, string_types): return value.split(',') return self._fields[name] def check(self, strict=False): """Check if the metadata is compliant. If strict is True then raise if no Name or Version are provided""" self.set_metadata_version() # XXX should check the versions (if the file was loaded) missing, warnings = [], [] for attr in ('Name', 'Version'): # required by PEP 345 if attr not in self: missing.append(attr) if strict and missing != []: msg = 'missing required metadata: %s' % ', '.join(missing) raise MetadataMissingError(msg) for attr in ('Home-page', 'Author'): if attr not in self: missing.append(attr) # checking metadata 1.2 (XXX needs to check 1.1, 1.0) if self['Metadata-Version'] != '1.2': return missing, warnings scheme = get_scheme(self.scheme) def are_valid_constraints(value): for v in value: if not scheme.is_valid_matcher(v.split(';')[0]): return False return True for fields, controller in ((_PREDICATE_FIELDS, are_valid_constraints), (_VERSIONS_FIELDS, scheme.is_valid_constraint_list), (_VERSION_FIELDS, scheme.is_valid_version)): for field in fields: value = self.get(field, None) if value is not None and not controller(value): warnings.append("Wrong value for '%s': %s" % (field, value)) return missing, warnings def todict(self, skip_missing=False): """Return fields as a dict. Field names will be converted to use the underscore-lowercase style instead of hyphen-mixed case (i.e. home_page instead of Home-page). """ self.set_metadata_version() mapping_1_0 = ( ('metadata_version', 'Metadata-Version'), ('name', 'Name'), ('version', 'Version'), ('summary', 'Summary'), ('home_page', 'Home-page'), ('author', 'Author'), ('author_email', 'Author-email'), ('license', 'License'), ('description', 'Description'), ('keywords', 'Keywords'), ('platform', 'Platform'), ('classifiers', 'Classifier'), ('download_url', 'Download-URL'), ) data = {} for key, field_name in mapping_1_0: if not skip_missing or field_name in self._fields: data[key] = self[field_name] if self['Metadata-Version'] == '1.2': mapping_1_2 = ( ('requires_dist', 'Requires-Dist'), ('requires_python', 'Requires-Python'), ('requires_external', 'Requires-External'), ('provides_dist', 'Provides-Dist'), ('obsoletes_dist', 'Obsoletes-Dist'), ('project_url', 'Project-URL'), ('maintainer', 'Maintainer'), ('maintainer_email', 'Maintainer-email'), ) for key, field_name in mapping_1_2: if not skip_missing or field_name in self._fields: if key != 'project_url': data[key] = self[field_name] else: data[key] = [','.join(u) for u in self[field_name]] elif self['Metadata-Version'] == '1.1': mapping_1_1 = ( ('provides', 'Provides'), ('requires', 'Requires'), ('obsoletes', 'Obsoletes'), ) for key, field_name in mapping_1_1: if not skip_missing or field_name in self._fields: data[key] = self[field_name] return data def add_requirements(self, requirements): if self['Metadata-Version'] == '1.1': # we can't have 1.1 metadata *and* Setuptools requires for field in ('Obsoletes', 'Requires', 'Provides'): if field in self: del self[field] self['Requires-Dist'] += requirements # Mapping API # TODO could add iter* variants def keys(self): return list(_version2fieldlist(self['Metadata-Version'])) def __iter__(self): for key in self.keys(): yield key def values(self): return [self[key] for key in self.keys()] def items(self): return [(key, self[key]) for key in self.keys()] def __repr__(self): return '<%s %s %s>' % (self.__class__.__name__, self.name, self.version) METADATA_FILENAME = 'pydist.json' WHEEL_METADATA_FILENAME = 'metadata.json' class Metadata(object): """ The metadata of a release. This implementation uses 2.0 (JSON) metadata where possible. If not possible, it wraps a LegacyMetadata instance which handles the key-value metadata format. """ METADATA_VERSION_MATCHER = re.compile('^\d+(\.\d+)*$') NAME_MATCHER = re.compile('^[0-9A-Z]([0-9A-Z_.-]*[0-9A-Z])?$', re.I) VERSION_MATCHER = PEP440_VERSION_RE SUMMARY_MATCHER = re.compile('.{1,2047}') METADATA_VERSION = '2.0' GENERATOR = 'distlib (%s)' % __version__ MANDATORY_KEYS = { 'name': (), 'version': (), 'summary': ('legacy',), } INDEX_KEYS = ('name version license summary description author ' 'author_email keywords platform home_page classifiers ' 'download_url') DEPENDENCY_KEYS = ('extras run_requires test_requires build_requires ' 'dev_requires provides meta_requires obsoleted_by ' 'supports_environments') SYNTAX_VALIDATORS = { 'metadata_version': (METADATA_VERSION_MATCHER, ()), 'name': (NAME_MATCHER, ('legacy',)), 'version': (VERSION_MATCHER, ('legacy',)), 'summary': (SUMMARY_MATCHER, ('legacy',)), } __slots__ = ('_legacy', '_data', 'scheme') def __init__(self, path=None, fileobj=None, mapping=None, scheme='default'): if [path, fileobj, mapping].count(None) < 2: raise TypeError('path, fileobj and mapping are exclusive') self._legacy = None self._data = None self.scheme = scheme #import pdb; pdb.set_trace() if mapping is not None: try: self._validate_mapping(mapping, scheme) self._data = mapping except MetadataUnrecognizedVersionError: self._legacy = LegacyMetadata(mapping=mapping, scheme=scheme) self.validate() else: data = None if path: with open(path, 'rb') as f: data = f.read() elif fileobj: data = fileobj.read() if data is None: # Initialised with no args - to be added self._data = { 'metadata_version': self.METADATA_VERSION, 'generator': self.GENERATOR, } else: if not isinstance(data, text_type): data = data.decode('utf-8') try: self._data = json.loads(data) self._validate_mapping(self._data, scheme) except ValueError: # Note: MetadataUnrecognizedVersionError does not # inherit from ValueError (it's a DistlibException, # which should not inherit from ValueError). # The ValueError comes from the json.load - if that # succeeds and we get a validation error, we want # that to propagate self._legacy = LegacyMetadata(fileobj=StringIO(data), scheme=scheme) self.validate() common_keys = set(('name', 'version', 'license', 'keywords', 'summary')) none_list = (None, list) none_dict = (None, dict) mapped_keys = { 'run_requires': ('Requires-Dist', list), 'build_requires': ('Setup-Requires-Dist', list), 'dev_requires': none_list, 'test_requires': none_list, 'meta_requires': none_list, 'extras': ('Provides-Extra', list), 'modules': none_list, 'namespaces': none_list, 'exports': none_dict, 'commands': none_dict, 'classifiers': ('Classifier', list), 'source_url': ('Download-URL', None), 'metadata_version': ('Metadata-Version', None), } del none_list, none_dict def __getattribute__(self, key): common = object.__getattribute__(self, 'common_keys') mapped = object.__getattribute__(self, 'mapped_keys') if key in mapped: lk, maker = mapped[key] if self._legacy: if lk is None: result = None if maker is None else maker() else: result = self._legacy.get(lk) else: value = None if maker is None else maker() if key not in ('commands', 'exports', 'modules', 'namespaces', 'classifiers'): result = self._data.get(key, value) else: # special cases for PEP 459 sentinel = object() result = sentinel d = self._data.get('extensions') if d: if key == 'commands': result = d.get('python.commands', value) elif key == 'classifiers': d = d.get('python.details') if d: result = d.get(key, value) else: d = d.get('python.exports') if not d: d = self._data.get('python.exports') if d: result = d.get(key, value) if result is sentinel: result = value elif key not in common: result = object.__getattribute__(self, key) elif self._legacy: result = self._legacy.get(key) else: result = self._data.get(key) return result def _validate_value(self, key, value, scheme=None): if key in self.SYNTAX_VALIDATORS: pattern, exclusions = self.SYNTAX_VALIDATORS[key] if (scheme or self.scheme) not in exclusions: m = pattern.match(value) if not m: raise MetadataInvalidError("'%s' is an invalid value for " "the '%s' property" % (value, key)) def __setattr__(self, key, value): self._validate_value(key, value) common = object.__getattribute__(self, 'common_keys') mapped = object.__getattribute__(self, 'mapped_keys') if key in mapped: lk, _ = mapped[key] if self._legacy: if lk is None: raise NotImplementedError self._legacy[lk] = value elif key not in ('commands', 'exports', 'modules', 'namespaces', 'classifiers'): self._data[key] = value else: # special cases for PEP 459 d = self._data.setdefault('extensions', {}) if key == 'commands': d['python.commands'] = value elif key == 'classifiers': d = d.setdefault('python.details', {}) d[key] = value else: d = d.setdefault('python.exports', {}) d[key] = value elif key not in common: object.__setattr__(self, key, value) else: if key == 'keywords': if isinstance(value, string_types): value = value.strip() if value: value = value.split() else: value = [] if self._legacy: self._legacy[key] = value else: self._data[key] = value @property def name_and_version(self): return _get_name_and_version(self.name, self.version, True) @property def provides(self): if self._legacy: result = self._legacy['Provides-Dist'] else: result = self._data.setdefault('provides', []) s = '%s (%s)' % (self.name, self.version) if s not in result: result.append(s) return result @provides.setter def provides(self, value): if self._legacy: self._legacy['Provides-Dist'] = value else: self._data['provides'] = value def get_requirements(self, reqts, extras=None, env=None): """ Base method to get dependencies, given a set of extras to satisfy and an optional environment context. :param reqts: A list of sometimes-wanted dependencies, perhaps dependent on extras and environment. :param extras: A list of optional components being requested. :param env: An optional environment for marker evaluation. """ if self._legacy: result = reqts else: result = [] extras = get_extras(extras or [], self.extras) for d in reqts: if 'extra' not in d and 'environment' not in d: # unconditional include = True else: if 'extra' not in d: # Not extra-dependent - only environment-dependent include = True else: include = d.get('extra') in extras if include: # Not excluded because of extras, check environment marker = d.get('environment') if marker: include = interpret(marker, env) if include: result.extend(d['requires']) for key in ('build', 'dev', 'test'): e = ':%s:' % key if e in extras: extras.remove(e) # A recursive call, but it should terminate since 'test' # has been removed from the extras reqts = self._data.get('%s_requires' % key, []) result.extend(self.get_requirements(reqts, extras=extras, env=env)) return result @property def dictionary(self): if self._legacy: return self._from_legacy() return self._data @property def dependencies(self): if self._legacy: raise NotImplementedError else: return extract_by_key(self._data, self.DEPENDENCY_KEYS) @dependencies.setter def dependencies(self, value): if self._legacy: raise NotImplementedError else: self._data.update(value) def _validate_mapping(self, mapping, scheme): if mapping.get('metadata_version') != self.METADATA_VERSION: raise MetadataUnrecognizedVersionError() missing = [] for key, exclusions in self.MANDATORY_KEYS.items(): if key not in mapping: if scheme not in exclusions: missing.append(key) if missing: msg = 'Missing metadata items: %s' % ', '.join(missing) raise MetadataMissingError(msg) for k, v in mapping.items(): self._validate_value(k, v, scheme) def validate(self): if self._legacy: missing, warnings = self._legacy.check(True) if missing or warnings: logger.warning('Metadata: missing: %s, warnings: %s', missing, warnings) else: self._validate_mapping(self._data, self.scheme) def todict(self): if self._legacy: return self._legacy.todict(True) else: result = extract_by_key(self._data, self.INDEX_KEYS) return result def _from_legacy(self): assert self._legacy and not self._data result = { 'metadata_version': self.METADATA_VERSION, 'generator': self.GENERATOR, } lmd = self._legacy.todict(True) # skip missing ones for k in ('name', 'version', 'license', 'summary', 'description', 'classifier'): if k in lmd: if k == 'classifier': nk = 'classifiers' else: nk = k result[nk] = lmd[k] kw = lmd.get('Keywords', []) if kw == ['']: kw = [] result['keywords'] = kw keys = (('requires_dist', 'run_requires'), ('setup_requires_dist', 'build_requires')) for ok, nk in keys: if ok in lmd and lmd[ok]: result[nk] = [{'requires': lmd[ok]}] result['provides'] = self.provides author = {} maintainer = {} return result LEGACY_MAPPING = { 'name': 'Name', 'version': 'Version', 'license': 'License', 'summary': 'Summary', 'description': 'Description', 'classifiers': 'Classifier', } def _to_legacy(self): def process_entries(entries): reqts = set() for e in entries: extra = e.get('extra') env = e.get('environment') rlist = e['requires'] for r in rlist: if not env and not extra: reqts.add(r) else: marker = '' if extra: marker = 'extra == "%s"' % extra if env: if marker: marker = '(%s) and %s' % (env, marker) else: marker = env reqts.add(';'.join((r, marker))) return reqts assert self._data and not self._legacy result = LegacyMetadata() nmd = self._data for nk, ok in self.LEGACY_MAPPING.items(): if nk in nmd: result[ok] = nmd[nk] r1 = process_entries(self.run_requires + self.meta_requires) r2 = process_entries(self.build_requires + self.dev_requires) if self.extras: result['Provides-Extra'] = sorted(self.extras) result['Requires-Dist'] = sorted(r1) result['Setup-Requires-Dist'] = sorted(r2) # TODO: other fields such as contacts return result def write(self, path=None, fileobj=None, legacy=False, skip_unknown=True): if [path, fileobj].count(None) != 1: raise ValueError('Exactly one of path and fileobj is needed') self.validate() if legacy: if self._legacy: legacy_md = self._legacy else: legacy_md = self._to_legacy() if path: legacy_md.write(path, skip_unknown=skip_unknown) else: legacy_md.write_file(fileobj, skip_unknown=skip_unknown) else: if self._legacy: d = self._from_legacy() else: d = self._data if fileobj: json.dump(d, fileobj, ensure_ascii=True, indent=2, sort_keys=True) else: with codecs.open(path, 'w', 'utf-8') as f: json.dump(d, f, ensure_ascii=True, indent=2, sort_keys=True) def add_requirements(self, requirements): if self._legacy: self._legacy.add_requirements(requirements) else: run_requires = self._data.setdefault('run_requires', []) always = None for entry in run_requires: if 'environment' not in entry and 'extra' not in entry: always = entry break if always is None: always = { 'requires': requirements } run_requires.insert(0, always) else: rset = set(always['requires']) | set(requirements) always['requires'] = sorted(rset) def __repr__(self): name = self.name or '(no name)' version = self.version or 'no version' return '<%s %s %s (%s)>' % (self.__class__.__name__, self.metadata_version, name, version)
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