Differential D6019 Diff 21770 swh/model/identifiers.py

Changeset View

Standalone View

swh/model/identifiers.py

	Show First 20 Lines • Show All 851 Lines • ▼ Show 20 Lines
	def extid_identifier(extid: Dict[str, Any]) -> str:			def extid_identifier(extid: Dict[str, Any]) -> str:
	"""Return the intrinsic identifier for an ExtID object.			"""Return the intrinsic identifier for an ExtID object.

	An ExtID identifier is a salted sha1 (using the git hashing algorithm with			An ExtID identifier is a salted sha1 (using the git hashing algorithm with
	the ``extid`` object type) of a manifest following the format:			the ``extid`` object type) of a manifest following the format:

	```			```
	extid_type $StrWithoutSpaces			extid_type $StrWithoutSpaces
				[extid_version $Str]
	extid $Bytes			extid $Bytes
	target $CoreSwhid			target $CoreSwhid
	```			```

	$StrWithoutSpaces is an ASCII string, and may not contain spaces.			$StrWithoutSpaces is an ASCII string, and may not contain spaces.

	Newlines in $Bytes are escaped as with other git fields, ie. by adding a			Newlines in $Bytes are escaped as with other git fields, ie. by adding a
	space after them.			space after them.

				The extid_version line is only generated if the version is non-zero.

	Returns:			Returns:
	str: the intrinsic identifier for `extid`			str: the intrinsic identifier for `extid`

	"""			"""

	headers = [			headers = [
	(b"extid_type", extid["extid_type"].encode("ascii")),			(b"extid_type", extid["extid_type"].encode("ascii")),
	(b"extid", extid["extid"]),
	(b"target", str(extid["target"]).encode("ascii")),
	]			]
				extid_version = extid.get("extid_version", 0)
				if extid_version != 0:
				headers.append((b"extid_version", str(extid_version).encode("ascii")))

				headers.extend(
				[(b"extid", extid["extid"]), (b"target", str(extid["target"]).encode("ascii")),]
				)

	git_object = format_git_object_from_headers("extid", headers)			git_object = format_git_object_from_headers("extid", headers)
	return hashlib.new("sha1", git_object).hexdigest()			return hashlib.new("sha1", git_object).hexdigest()


	# type of the "object_type" attribute of the SWHID class; either			# type of the "object_type" attribute of the SWHID class; either
	# ObjectType or ExtendedObjectType			# ObjectType or ExtendedObjectType
	_TObjectType = TypeVar("_TObjectType", ObjectType, ExtendedObjectType)			_TObjectType = TypeVar("_TObjectType", ObjectType, ExtendedObjectType)
	▲ Show 20 Lines • Show All 382 Lines • Show Last 20 Lines