137 lines
6 KiB
Python
137 lines
6 KiB
Python
import bisect
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from cnr.exception import PackageAlreadyExists
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from cnr.models.package_base import manifest_media_type
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from data.database import (db_transaction, get_epoch_timestamp, Manifest, ManifestList, Tag,
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ManifestListManifest, Blob, ManifestBlob)
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from data.oci_model import (blob as blob_model, manifest as manifest_model,
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manifest_list as manifest_list_model,
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tag as tag_model)
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LIST_MEDIA_TYPE = 'application/vnd.cnr.manifest.list.v0.json'
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SCHEMA_VERSION = 'v0'
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def _ensure_sha256_header(digest):
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if digest.startswith('sha256:'):
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return digest
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return 'sha256:' + digest
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def get_app_release(repo, tag_name, media_type):
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""" Returns (tag, manifest, blob) given a repo object, tag_name, and media_type). """
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tag = tag_model.get_tag(repo, tag_name, tag_kind='release')
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media_type_id = ManifestListManifest.media_type.get_id(manifest_media_type(media_type))
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manifestlistmanifest = (tag.manifest_list.manifestlistmanifest_set
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.join(Manifest)
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.where(ManifestListManifest.media_type == media_type_id).get())
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manifest = manifestlistmanifest.manifest
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blob = Blob.select().join(ManifestBlob).where(ManifestBlob.manifest == manifest).get()
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return (tag, manifest, blob)
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def delete_app_release(repo, tag_name, media_type):
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""" Terminate a Tag/media-type couple
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It find the corresponding tag/manifest and remove from the manifestlistmanifest the manifest
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1. it terminates the current tag (in all-cases)
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2. if the new manifestlist is not empty, it creates a new tag for it
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"""
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media_type_id = ManifestListManifest.media_type.get_id(manifest_media_type(media_type))
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with db_transaction():
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tag = tag_model.get_tag(repo, tag_name)
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manifest_list = tag.manifest_list
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list_json = manifest_list.manifest_list_json
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mlm_query = (ManifestListManifest
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.select()
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.where(ManifestListManifest.manifest_list == tag.manifest_list))
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list_manifest_ids = sorted([mlm.manifest_id for mlm in mlm_query])
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manifestlistmanifest = (tag
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.manifest_list
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.manifestlistmanifest_set
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.where(ManifestListManifest.media_type == media_type_id).get())
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index = list_manifest_ids.index(manifestlistmanifest.manifest_id)
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list_manifest_ids.pop(index)
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list_json.pop(index)
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if not list_json:
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tag.lifetime_end = get_epoch_timestamp()
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tag.save()
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else:
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manifestlist = manifest_list_model.get_or_create_manifest_list(list_json, LIST_MEDIA_TYPE,
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SCHEMA_VERSION)
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manifest_list_model.create_manifestlistmanifest(manifestlist, list_manifest_ids,
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list_json)
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tag = tag_model.create_or_update_tag(repo, tag_name, manifest_list=manifestlist,
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tag_kind="release")
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return tag
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def create_app_release(repo, tag_name, manifest_data, digest, force=False):
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""" Create a new application release, it includes creating a new Tag, ManifestList,
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ManifestListManifests, Manifest, ManifestBlob.
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To deduplicate the ManifestList, the manifestlist_json is kept ordered by the manifest.id.
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To find the insert point in the ManifestList it uses bisect on the manifest-ids list.
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"""
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with db_transaction():
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# Create/get the package manifest
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manifest = manifest_model.get_or_create_manifest(manifest_data, manifest_data['mediaType'])
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# get the tag
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tag = tag_model.get_or_initialize_tag(repo, tag_name)
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if tag.manifest_list is None:
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tag.manifest_list = ManifestList(media_type=ManifestList.media_type.get_id(LIST_MEDIA_TYPE),
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schema_version=SCHEMA_VERSION,
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manifest_list_json=[])
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elif tag_model.tag_media_type_exists(tag, manifest.media_type):
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if force:
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delete_app_release(repo, tag_name, manifest.media_type.name)
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return create_app_release(repo, tag_name, manifest_data, digest, force=False)
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else:
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raise PackageAlreadyExists("package exists already")
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list_json = tag.manifest_list.manifest_list_json
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mlm_query = (ManifestListManifest
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.select()
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.where(ManifestListManifest.manifest_list == tag.manifest_list))
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list_manifest_ids = sorted([mlm.manifest_id for mlm in mlm_query])
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insert_point = bisect.bisect_left(list_manifest_ids, manifest.id)
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list_json.insert(insert_point, manifest.manifest_json)
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list_manifest_ids.insert(insert_point, manifest.id)
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manifestlist = manifest_list_model.get_or_create_manifest_list(list_json, LIST_MEDIA_TYPE,
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SCHEMA_VERSION)
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manifest_list_model.create_manifestlistmanifest(manifestlist, list_manifest_ids, list_json)
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tag = tag_model.create_or_update_tag(repo, tag_name, manifest_list=manifestlist,
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tag_kind="release")
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blob_digest = digest
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try:
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(ManifestBlob
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.select()
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.join(Blob)
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.where(ManifestBlob.manifest == manifest,
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Blob.digest == _ensure_sha256_header(blob_digest)).get())
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except ManifestBlob.DoesNotExist:
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blob = blob_model.get_blob(blob_digest)
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ManifestBlob.create(manifest=manifest, blob=blob)
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return tag
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def get_release_objs(repo, media_type=None):
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""" Returns an array of Tag for a repo, with optional filtering by media_type. """
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release_query = (Tag
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.select()
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.where(Tag.repository == repo,
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Tag.tag_kind == Tag.tag_kind.get_id("release")))
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if media_type:
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release_query = tag_model.filter_tags_by_media_type(release_query, media_type)
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return tag_model.tag_alive_oci(release_query)
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def get_releases(repo, media_type=None):
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""" Returns an array of Tag.name for a repo, can filter by media_type. """
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return [t.name for t in get_release_objs(repo, media_type)]
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