437 lines
16 KiB
Python
437 lines
16 KiB
Python
from abc import ABCMeta, abstractmethod
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from collections import namedtuple
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from datetime import datetime
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import cnr.semver
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from cnr.exception import raise_package_not_found, raise_channel_not_found
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from six import add_metaclass
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from app import storage
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from data import model, oci_model
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from data.database import Tag, Manifest, MediaType, Blob, Repository, Channel
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class BlobDescriptor(namedtuple('Blob', ['mediaType', 'size', 'digest', 'urls'])):
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""" BlobDescriptor describes a blob with its mediatype, size and digest.
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A BlobDescriptor is used to retrieves the actual blob.
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"""
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class ChannelReleasesView(namedtuple('ChannelReleasesView', ['name', 'current', 'releases'])):
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""" A channel is a pointer to a Release (current).
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Releases are the previous tags pointed by channel (history).
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"""
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class ChannelView(namedtuple('ChannelView', ['name', 'current'])):
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""" A channel is a pointer to a Release (current).
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"""
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class ApplicationSummaryView(namedtuple('ApplicationSummaryView', ['name',
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'namespace',
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'visibility',
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'default',
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'manifests',
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'channels',
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'releases',
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'updated_at',
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'created_at'])):
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""" ApplicationSummaryView is an aggregated view of an application repository.
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"""
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class ApplicationManifest(namedtuple('ApplicationManifest', ['mediaType',
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'digest',
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'content'])):
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""" ApplicationManifest embed the BlobDescriptor and some metadata around it.
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An ApplicationManifest is content-addressable.
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"""
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class ApplicationRelease(namedtuple('ApplicationRelease', ['release',
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'name',
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'created_at',
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'manifest'])):
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""" The ApplicationRelease associates an ApplicationManifest to a repository and release.
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"""
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@add_metaclass(ABCMeta)
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class AppRegistryDataInterface(object):
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""" Interface that represents all data store interactions required by a App Registry.
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"""
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@abstractmethod
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def _application(self, package_name):
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pass
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@abstractmethod
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def list_applications(self, namespace=None, media_type=None, search=None, username=None,
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with_channels=False):
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""" Lists all repositories that contain applications, with optional filtering to a specific
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namespace and/or to those visible to a specific user.
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Returns: list of ApplicationSummaryView
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"""
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@abstractmethod
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def application_is_public(self, package_name):
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"""
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Returns true if the application is public
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"""
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@abstractmethod
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def create_application(self, package_name, visibility, owner):
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""" Create a new app repository, owner is the user who creates it """
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@abstractmethod
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def application_exists(self, package_name):
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""" Returns true if the application exists """
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@abstractmethod
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def basic_search(self, query, username=None):
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""" Returns an array of matching application in the format: 'namespace/name'
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Note:
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* Only 'public' repositories are returned
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"""
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# @TODO: Paginate
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@abstractmethod
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def list_releases(self, package_name, media_type=None):
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""" Returns the list of all releases(names) of an AppRepository
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Example:
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>>> get_app_releases('ant31/rocketchat')
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['1.7.1', '1.7.0', '1.7.2']
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"""
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# @TODO: Paginate
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@abstractmethod
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def list_manifests(self, package_name, release=None):
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""" Returns the list of all available manifests type of an Application across all releases or
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for a specific one.
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Example:
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>>> get_app_releases('ant31/rocketchat')
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['1.7.1', '1.7.0', '1.7.2']
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"""
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@abstractmethod
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def fetch_release(self, package_name, release, media_type):
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"""
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Returns an ApplicationRelease
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"""
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@abstractmethod
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def store_blob(self, cnrblob, content_media_type):
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"""
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Upload the blob content to a storage location and creates a Blob entry in the DB.
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Returns a BlobDescriptor
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"""
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@abstractmethod
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def create_release(self, package, user, visibility, force=False):
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""" Creates and returns an ApplicationRelease
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- package is a data.model.Package object
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- user is the owner of the package
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- visibility is a string: 'public' or 'private'
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"""
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@abstractmethod
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def release_exists(self, package, release):
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""" Return true if a release with that name already exist or
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has existed (including deleted ones)
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"""
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pass
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@abstractmethod
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def delete_release(self, package_name, release, media_type):
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""" Remove/Delete an app-release from an app-repository.
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It does not delete the entire app-repository, only a single release
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"""
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@abstractmethod
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def list_release_channels(self, package_name, release, active=True):
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""" Returns a list of Channel that are/was pointing to a release.
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If active is True, returns only active Channel (lifetime_end not null)
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"""
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@abstractmethod
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def channel_exists(self, package_name, channel_name):
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""" Returns true if the channel with the given name exists under the matching package """
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@abstractmethod
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def update_channel(self, package_name, channel_name, release):
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""" Append a new release to the Channel
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Returns a new Channel with the release as current
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"""
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@abstractmethod
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def delete_channel(self, package_name, channel_name):
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""" Delete a Channel, it doesn't delete/touch the ApplicationRelease pointed by the channel """
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# @TODO: Paginate
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@abstractmethod
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def list_channels(self, package_name):
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""" Returns all AppChannel for a package """
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@abstractmethod
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def fetch_channel(self, package_name, channel_name, with_releases=True):
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""" Returns an Channel
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Raises: ChannelNotFound, PackageNotFound
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"""
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def _split_package_name(package):
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""" Returns the namespace and package-name """
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return package.split("/")
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def _join_package_name(ns, name):
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""" Returns a app-name in the 'namespace/name' format """
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return "%s/%s" % (ns, name)
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def _timestamp_to_iso(timestamp, in_ms=True):
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if in_ms:
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timestamp = timestamp / 1000
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return datetime.fromtimestamp(timestamp).isoformat()
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class OCIAppModel(AppRegistryDataInterface):
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def _application(self, package):
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ns, name = _split_package_name(package)
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repo = model.repository.get_app_repository(ns, name)
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if repo is None:
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raise_package_not_found(package)
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return repo
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def list_applications(self, namespace=None, media_type=None, search=None, username=None,
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with_channels=False):
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""" Lists all repositories that contain applications, with optional filtering to a specific
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namespace and view a specific user.
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"""
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views = []
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for repo in oci_model.package.list_packages_query(namespace, media_type, search,
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username=username):
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releases = [t.name for t in repo.tag_set_prefetch]
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if not releases:
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continue
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available_releases = [str(x) for x in sorted(cnr.semver.versions(releases, False),
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reverse=True)]
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channels = None
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if with_channels:
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channels = [ChannelView(name=chan.name, current=chan.linked_tag.name)
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for chan in oci_model.channel.get_repo_channels(repo)]
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app_name = _join_package_name(repo.namespace_user.username, repo.name)
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manifests = self.list_manifests(app_name, available_releases[0])
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view = ApplicationSummaryView(
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namespace=repo.namespace_user.username,
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name=app_name,
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visibility=repo.visibility.name,
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default=available_releases[0],
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channels=channels,
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manifests=manifests,
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releases=available_releases,
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updated_at=_timestamp_to_iso(repo.tag_set_prefetch[-1].lifetime_start),
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created_at=_timestamp_to_iso(repo.tag_set_prefetch[0].lifetime_start),
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)
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views.append(view)
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return views
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def application_is_public(self, package_name):
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"""
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Returns:
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* True if the repository is public
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"""
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namespace, name = _split_package_name(package_name)
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return model.repository.repository_is_public(namespace, name)
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def create_application(self, package_name, visibility, owner):
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""" Create a new app repository, owner is the user who creates it """
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ns, name = _split_package_name(package_name)
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model.repository.create_repository(ns, name, owner, visibility, "application")
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def application_exists(self, package_name):
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""" Create a new app repository, owner is the user who creates it """
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ns, name = _split_package_name(package_name)
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return model.repository.get_repository(ns, name, kind_filter='application') is not None
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def basic_search(self, query, username=None):
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""" Returns an array of matching AppRepositories in the format: 'namespace/name'
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Note:
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* Only 'public' repositories are returned
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Todo:
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* Filter results with readeable reposistory for the user (including visibilitys)
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"""
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return [_join_package_name(r.namespace_user.username, r.name)
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for r in model.repository.get_app_search(lookup=query, username=username, limit=50)]
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def list_releases(self, package_name, media_type=None):
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""" Return the list of all releases of an Application
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Example:
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>>> get_app_releases('ant31/rocketchat')
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['1.7.1', '1.7.0', '1.7.2']
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Todo:
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* Paginate
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"""
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return oci_model.release.get_releases(self._application(package_name), media_type)
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def list_manifests(self, package_name, release=None):
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""" Returns the list of all manifests of an Application.
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Todo:
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* Paginate
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"""
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try:
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repo = self._application(package_name)
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return list(oci_model.manifest.get_manifest_types(repo, release))
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except (Repository.DoesNotExist, Tag.DoesNotExist):
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raise_package_not_found(package_name, release)
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def fetch_release(self, package_name, release, media_type):
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"""
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Retrieves an AppRelease from it's repository-name and release-name
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"""
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repo = self._application(package_name)
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try:
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tag, manifest, blob = oci_model.release.get_app_release(repo, release, media_type)
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created_at = _timestamp_to_iso(tag.lifetime_start)
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blob_descriptor = BlobDescriptor(digest=_strip_sha256_header(blob.digest),
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mediaType=blob.media_type.name,
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size=blob.size, urls=[])
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app_manifest = ApplicationManifest(digest=manifest.digest, mediaType=manifest.media_type.name,
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content=blob_descriptor)
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app_release = ApplicationRelease(release=tag.name,
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created_at=created_at,
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name=package_name,
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manifest=app_manifest)
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return app_release
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except (Tag.DoesNotExist,
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Manifest.DoesNotExist,
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Blob.DoesNotExist,
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Repository.DoesNotExist,
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MediaType.DoesNotExist):
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raise_package_not_found(package_name, release, media_type)
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def store_blob(self, cnrblob, content_media_type):
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fp = cnrblob.packager.io_file
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path = cnrblob.upload_url(cnrblob.digest)
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locations = storage.preferred_locations
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storage.stream_write(locations, path, fp, 'application/x-gzip')
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db_blob = oci_model.blob.get_or_create_blob(cnrblob.digest,
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cnrblob.size,
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content_media_type,
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locations)
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return BlobDescriptor(mediaType=content_media_type,
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digest=_strip_sha256_header(db_blob.digest),
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size=db_blob.size,
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urls=[])
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def create_release(self, package, user, visibility, force=False):
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""" Add an app-release to a repository
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package is an instance of data.cnr.package.Package
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"""
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data = package.manifest()
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ns, name = package.namespace, package.name
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repo = model.repository.get_or_create_repository(ns, name, user, visibility=visibility,
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repo_kind='application')
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tag_name = package.release
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oci_model.release.create_app_release(repo, tag_name, package.manifest(),
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data['content']['digest'], force)
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def delete_release(self, package_name, release, media_type):
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""" Remove/Delete an app-release from an app-repository.
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It does not delete the entire app-repository, only a single release
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"""
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repo = self._application(package_name)
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try:
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oci_model.release.delete_app_release(repo, release, media_type)
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except (Channel.DoesNotExist, Tag.DoesNotExist, MediaType.DoesNotExist):
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raise_package_not_found(package_name, release, media_type)
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def release_exists(self, package, release):
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""" Return true if a release with that name already exist or
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have existed (include deleted ones) """
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def channel_exists(self, package_name, channel_name):
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""" Returns true if channel exists """
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repo = self._application(package_name)
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return oci_model.tag.tag_exists(repo, channel_name, "channel")
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def delete_channel(self, package_name, channel_name):
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""" Delete an AppChannel
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Note:
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It doesn't delete the AppReleases
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"""
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repo = self._application(package_name)
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try:
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oci_model.channel.delete_channel(repo, channel_name)
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except (Channel.DoesNotExist, Tag.DoesNotExist):
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raise_channel_not_found(package_name, channel_name)
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def list_channels(self, package_name):
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""" Returns all AppChannel for a package """
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repo = self._application(package_name)
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channels = oci_model.channel.get_repo_channels(repo)
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return [ChannelView(name=chan.name,
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current=chan.linked_tag.name) for chan in channels]
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def fetch_channel(self, package_name, channel_name, with_releases=True):
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""" Returns an AppChannel """
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repo = self._application(package_name)
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try:
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channel = oci_model.channel.get_channel(repo, channel_name)
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except (Channel.DoesNotExist, Tag.DoesNotExist):
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raise_channel_not_found(package_name, channel_name)
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if with_releases:
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releases = oci_model.channel.get_channel_releases(repo, channel)
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chanview = ChannelReleasesView(current=channel.linked_tag.name,
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name=channel.name,
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releases=[channel.linked_tag.name]+[c.name for c in releases])
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else:
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chanview = ChannelView(current=channel.linked_tag.name,
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name=channel.name)
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return chanview
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def list_release_channels(self, package_name, release, active=True):
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repo = self._application(package_name)
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try:
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channels = oci_model.channel.get_tag_channels(repo, release, active=active)
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return [ChannelView(name=c.name, current=c.linked_tag.name) for c in channels]
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except (Channel.DoesNotExist, Tag.DoesNotExist):
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raise_package_not_found(package_name, release)
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def update_channel(self, package_name, channel_name, release):
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""" Append a new release to the AppChannel
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Returns:
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A new AppChannel with the release
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"""
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repo = self._application(package_name)
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channel = oci_model.channel.create_or_update_channel(repo, channel_name, release)
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return ChannelView(current=channel.linked_tag.name,
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name=channel.name)
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def _strip_sha256_header(digest):
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if digest.startswith('sha256:'):
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return digest.split('sha256:')[1]
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return digest
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oci_app_model = OCIAppModel()
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