Source code for swh.loader.package.archive.loader

# Copyright (C) 2019-2024  The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information

from __future__ import annotations

import datetime
import hashlib
import logging
from os import path
import string
from typing import Any, Dict, Iterator, Mapping, Optional, Sequence, Tuple, Union

import attr
import iso8601

from swh.loader.core.utils import EMPTY_AUTHOR, release_name
from swh.loader.package.loader import BasePackageInfo, PackageLoader, PartialExtID
from swh.model.model import ObjectType, Release, Sha1Git, TimestampWithTimezone
from import StorageInterface

logger = logging.getLogger(__name__)

[docs] @attr.s class ArchivePackageInfo(BasePackageInfo): raw_info = attr.ib(type=Dict[str, Any]) length = attr.ib(type=int) """Size of the archive file""" time = attr.ib(type=Union[str, datetime.datetime]) """Timestamp of the archive file on the server""" # default format for gnu MANIFEST_FORMAT = string.Template("$time $length $version $url")
[docs] def extid(self, manifest_format: Optional[string.Template] = None) -> PartialExtID: """Returns a unique intrinsic identifier of this package info ``manifest_format`` allows overriding the class' default MANIFEST_FORMAT""" manifest_format = manifest_format or self.MANIFEST_FORMAT # TODO: use parsed attributes instead of self.raw_info manifest = manifest_format.substitute( {k: str(v) for (k, v) in self.raw_info.items()} ) return ( self.EXTID_TYPE, self.EXTID_VERSION, hashlib.sha256(manifest.encode()).digest(), )
[docs] @classmethod def from_metadata(cls, a_metadata: Dict[str, Any]) -> ArchivePackageInfo: url = a_metadata["url"] filename = a_metadata.get("filename") return cls( url=url, filename=filename if filename else path.split(url)[-1], raw_info=a_metadata, length=a_metadata["length"], time=a_metadata["time"], version=a_metadata["version"], checksums={"length": a_metadata["length"]}, )
[docs] class ArchiveLoader(PackageLoader[ArchivePackageInfo]): """Load archive origin's artifact files into swh archive""" visit_type = "tar" def __init__( self, storage: StorageInterface, url: str, artifacts: Sequence[Dict[str, Any]], extid_manifest_format: Optional[str] = None, snapshot_append: bool = False, **kwargs: Any, ): f"""Loader constructor. For now, this is the lister's task output. Args: url: Origin url artifacts: List of artifact information with keys: - **time**: last modification time as either isoformat date string or timestamp - **url**: the artifact url to retrieve filename - **filename**: optionally, the file's name - **version**: artifact's version - **length**: artifact's length extid_manifest_format: template string used to format a manifest, which is hashed to get the extid of a package. Defaults to {ArchivePackageInfo.MANIFEST_FORMAT!r} snapshot_append: if :const:`True`, append latest snapshot content to the new snapshot created by the loader """ super().__init__(storage=storage, url=url, **kwargs) self.artifacts = artifacts # assume order is enforced in the lister self.extid_manifest_format = ( None if extid_manifest_format is None else string.Template(extid_manifest_format) ) self.snapshot_append = snapshot_append
[docs] def get_versions(self) -> Sequence[str]: versions = [] for archive in self.artifacts: v = archive.get("version") if v: versions.append(v) return versions
[docs] def get_default_version(self) -> str: # It's the most recent, so for this loader, it's the last one return self.artifacts[-1]["version"]
[docs] def get_package_info( self, version: str ) -> Iterator[Tuple[str, ArchivePackageInfo]]: for a_metadata in self.artifacts: p_info = ArchivePackageInfo.from_metadata(a_metadata) if version == p_info.version: # FIXME: this code assumes we have only 1 artifact per # versioned package yield release_name(version), p_info
[docs] def new_packageinfo_to_extid( self, p_info: ArchivePackageInfo ) -> Optional[PartialExtID]: return p_info.extid(manifest_format=self.extid_manifest_format)
[docs] def build_release( self, p_info: ArchivePackageInfo, uncompressed_path: str, directory: Sha1Git ) -> Optional[Release]: time = p_info.time # assume it's a timestamp if isinstance(time, str): # otherwise, assume it's a parsable date parsed_time = iso8601.parse_date(time) else: parsed_time = time normalized_time = ( TimestampWithTimezone.from_datetime(parsed_time) if parsed_time is not None else None ) msg = f"Synthetic release for archive at {p_info.url}\n" return Release( name=p_info.version.encode(), message=msg.encode(), date=normalized_time, author=EMPTY_AUTHOR, target=directory, target_type=ObjectType.DIRECTORY, synthetic=True, )
[docs] def extra_branches(self) -> Dict[bytes, Mapping[str, Any]]: if not self.snapshot_append: return {} last_snapshot = self.last_snapshot() return last_snapshot.to_dict()["branches"] if last_snapshot else {}