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#
# SPDX-License-Identifier: GPL-2.0-only
#
import hashlib
import itertools
import json
SPDX_VERSION = "2.2"
class _Property(object):
def __init__(self, *, default=None):
self.default = default
def setdefault(self, dest, name):
if self.default is not None:
dest.setdefault(name, self.default)
class _String(_Property):
def __init__(self, **kwargs):
super().__init__(**kwargs)
def set_property(self, attrs, name):
def get_helper(obj):
return obj._spdx[name]
def set_helper(obj, value):
obj._spdx[name] = value
def del_helper(obj):
del obj._spdx[name]
attrs[name] = property(get_helper, set_helper, del_helper)
def init(self, source):
return source
class _Object(_Property):
def __init__(self, cls, **kwargs):
super().__init__(**kwargs)
self.cls = cls
def set_property(self, attrs, name):
def get_helper(obj):
if not name in obj._spdx:
obj._spdx[name] = self.cls()
return obj._spdx[name]
def set_helper(obj, value):
obj._spdx[name] = value
def del_helper(obj):
del obj._spdx[name]
attrs[name] = property(get_helper, set_helper)
def init(self, source):
return self.cls(**source)
class _ListProperty(_Property):
def __init__(self, prop, **kwargs):
super().__init__(**kwargs)
self.prop = prop
def set_property(self, attrs, name):
def get_helper(obj):
if not name in obj._spdx:
obj._spdx[name] = []
return obj._spdx[name]
def del_helper(obj):
del obj._spdx[name]
attrs[name] = property(get_helper, None, del_helper)
def init(self, source):
return [self.prop.init(o) for o in source]
class _StringList(_ListProperty):
def __init__(self, **kwargs):
super().__init__(_String(), **kwargs)
class _ObjectList(_ListProperty):
def __init__(self, cls, **kwargs):
super().__init__(_Object(cls), **kwargs)
class MetaSPDXObject(type):
def __new__(mcls, name, bases, attrs):
attrs["_properties"] = {}
for key in attrs.keys():
if isinstance(attrs[key], _Property):
prop = attrs[key]
attrs["_properties"][key] = prop
prop.set_property(attrs, key)
return super().__new__(mcls, name, bases, attrs)
class SPDXObject(metaclass=MetaSPDXObject):
def __init__(self, **d):
self._spdx = {}
for name, prop in self._properties.items():
prop.setdefault(self._spdx, name)
if name in d:
self._spdx[name] = prop.init(d[name])
def serializer(self):
return self._spdx
def __setattr__(self, name, value):
if name in self._properties or name == "_spdx":
super().__setattr__(name, value)
return
raise KeyError("%r is not a valid SPDX property" % name)
class SPDXChecksum(SPDXObject):
algorithm = _String()
checksumValue = _String()
class SPDXRelationship(SPDXObject):
spdxElementId = _String()
relatedSpdxElement = _String()
relationshipType = _String()
comment = _String()
class SPDXExternalReference(SPDXObject):
referenceCategory = _String()
referenceType = _String()
referenceLocator = _String()
class SPDXPackageVerificationCode(SPDXObject):
packageVerificationCodeValue = _String()
packageVerificationCodeExcludedFiles = _StringList()
class SPDXPackage(SPDXObject):
name = _String()
SPDXID = _String()
versionInfo = _String()
downloadLocation = _String(default="NOASSERTION")
packageSupplier = _String(default="NOASSERTION")
homepage = _String()
licenseConcluded = _String(default="NOASSERTION")
licenseDeclared = _String(default="NOASSERTION")
summary = _String()
description = _String()
sourceInfo = _String()
copyrightText = _String(default="NOASSERTION")
licenseInfoFromFiles = _StringList(default=["NOASSERTION"])
externalRefs = _ObjectList(SPDXExternalReference)
packageVerificationCode = _Object(SPDXPackageVerificationCode)
hasFiles = _StringList()
packageFileName = _String()
class SPDXFile(SPDXObject):
SPDXID = _String()
fileName = _String()
licenseConcluded = _String(default="NOASSERTION")
copyrightText = _String(default="NOASSERTION")
licenseInfoInFiles = _StringList(default=["NOASSERTION"])
checksums = _ObjectList(SPDXChecksum)
fileTypes = _StringList()
class SPDXCreationInfo(SPDXObject):
created = _String()
licenseListVersion = _String()
comment = _String()
creators = _StringList()
class SPDXExternalDocumentRef(SPDXObject):
externalDocumentId = _String()
spdxDocument = _String()
checksum = _Object(SPDXChecksum)
class SPDXDocument(SPDXObject):
spdxVersion = _String(default="SPDX-" + SPDX_VERSION)
dataLicense = _String(default="CC0-1.0")
SPDXID = _String(default="SPDXRef-DOCUMENT")
name = _String()
documentNamespace = _String()
creationInfo = _Object(SPDXCreationInfo)
packages = _ObjectList(SPDXPackage)
files = _ObjectList(SPDXFile)
relationships = _ObjectList(SPDXRelationship)
externalDocumentRefs = _ObjectList(SPDXExternalDocumentRef)
def __init__(self, **d):
super().__init__(**d)
def to_json(self, f, *, sort_keys=False, indent=None, separators=None):
class Encoder(json.JSONEncoder):
def default(self, o):
if isinstance(o, SPDXObject):
return o.serializer()
return super().default(o)
sha1 = hashlib.sha1()
for chunk in Encoder(
sort_keys=sort_keys,
indent=indent,
separators=separators,
).iterencode(self):
chunk = chunk.encode("utf-8")
f.write(chunk)
sha1.update(chunk)
return sha1.hexdigest()
@classmethod
def from_json(cls, f):
return cls(**json.load(f))
def add_relationship(self, _from, relationship, _to, *, comment=None):
if isinstance(_from, SPDXObject):
from_spdxid = _from.SPDXID
else:
from_spdxid = _from
if isinstance(_to, SPDXObject):
to_spdxid = _to.SPDXID
else:
to_spdxid = _to
r = SPDXRelationship(
spdxElementId=from_spdxid,
relatedSpdxElement=to_spdxid,
relationshipType=relationship,
)
if comment is not None:
r.comment = comment
self.relationships.append(r)
def find_by_spdxid(self, spdxid):
for o in itertools.chain(self.packages, self.files):
if o.SPDXID == spdxid:
return o
return None
def find_external_document_ref(self, namespace):
for r in self.externalDocumentRefs:
if r.spdxDocument == namespace:
return r
return None
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