143 lines
4.7 KiB
Python
143 lines
4.7 KiB
Python
import logging
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from cachetools import lru_cache
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from data.database import (Label, TagManifestLabel, MediaType, LabelSourceType, db_transaction,
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ManifestLabel, TagManifestLabelMap, TagManifestToManifest)
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from data.model import InvalidLabelKeyException, InvalidMediaTypeException, DataModelException
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from data.text import prefix_search
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from util.validation import validate_label_key
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from util.validation import is_json
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logger = logging.getLogger(__name__)
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@lru_cache(maxsize=1)
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def get_label_source_types():
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source_type_map = {}
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for kind in LabelSourceType.select():
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source_type_map[kind.id] = kind.name
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source_type_map[kind.name] = kind.id
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return source_type_map
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@lru_cache(maxsize=1)
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def get_media_types():
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media_type_map = {}
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for kind in MediaType.select():
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media_type_map[kind.id] = kind.name
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media_type_map[kind.name] = kind.id
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return media_type_map
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def _get_label_source_type_id(name):
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kinds = get_label_source_types()
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return kinds[name]
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def _get_media_type_id(name):
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kinds = get_media_types()
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return kinds[name]
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def create_manifest_label(tag_manifest, key, value, source_type_name, media_type_name=None):
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""" Creates a new manifest label on a specific tag manifest. """
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if not key:
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raise InvalidLabelKeyException()
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# Note that we don't prevent invalid label names coming from the manifest to be stored, as Docker
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# does not currently prevent them from being put into said manifests.
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if not validate_label_key(key) and source_type_name != 'manifest':
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raise InvalidLabelKeyException()
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# Find the matching media type. If none specified, we infer.
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if media_type_name is None:
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media_type_name = 'text/plain'
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if is_json(value):
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media_type_name = 'application/json'
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media_type_id = _get_media_type_id(media_type_name)
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if media_type_id is None:
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raise InvalidMediaTypeException()
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source_type_id = _get_label_source_type_id(source_type_name)
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with db_transaction():
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label = Label.create(key=key, value=value, source_type=source_type_id, media_type=media_type_id)
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tag_manifest_label = TagManifestLabel.create(annotated=tag_manifest, label=label,
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repository=tag_manifest.tag.repository)
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try:
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mapping_row = TagManifestToManifest.get(tag_manifest=tag_manifest)
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if mapping_row.manifest:
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manifest_label = ManifestLabel.create(manifest=mapping_row.manifest, label=label,
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repository=tag_manifest.tag.repository)
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TagManifestLabelMap.create(manifest_label=manifest_label,
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tag_manifest_label=tag_manifest_label,
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label=label,
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manifest=mapping_row.manifest,
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tag_manifest=tag_manifest)
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except TagManifestToManifest.DoesNotExist:
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pass
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return label
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def list_manifest_labels(tag_manifest, prefix_filter=None):
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""" Lists all labels found on the given tag manifest. """
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query = (Label.select(Label, MediaType)
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.join(MediaType)
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.switch(Label)
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.join(LabelSourceType)
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.switch(Label)
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.join(TagManifestLabel)
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.where(TagManifestLabel.annotated == tag_manifest))
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if prefix_filter is not None:
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query = query.where(prefix_search(Label.key, prefix_filter))
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return query
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def get_manifest_label(label_uuid, tag_manifest):
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""" Retrieves the manifest label on the tag manifest with the given ID. """
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try:
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return (Label.select(Label, LabelSourceType)
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.join(LabelSourceType)
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.where(Label.uuid == label_uuid)
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.switch(Label)
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.join(TagManifestLabel)
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.where(TagManifestLabel.annotated == tag_manifest)
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.get())
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except Label.DoesNotExist:
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return None
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def delete_manifest_label(label_uuid, tag_manifest):
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""" Deletes the manifest label on the tag manifest with the given ID. """
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# Find the label itself.
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label = get_manifest_label(label_uuid, tag_manifest)
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if label is None:
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return None
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if not label.source_type.mutable:
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raise DataModelException('Cannot delete immutable label')
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# Delete the mapping records and label.
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(TagManifestLabelMap
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.delete()
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.where(TagManifestLabelMap.label == label)
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.execute())
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deleted_count = TagManifestLabel.delete().where(TagManifestLabel.label == label).execute()
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if deleted_count != 1:
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logger.warning('More than a single label deleted for matching label %s', label_uuid)
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deleted_count = ManifestLabel.delete().where(ManifestLabel.label == label).execute()
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if deleted_count != 1:
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logger.warning('More than a single label deleted for matching label %s', label_uuid)
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label.delete_instance(recursive=False)
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return label
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