457 lines
16 KiB
Python
457 lines
16 KiB
Python
import logging
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import random
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from enum import Enum
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from datetime import timedelta, datetime
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from peewee import Case, JOIN, fn, SQL, IntegrityError
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from cachetools.func import ttl_cache
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from data.model import (
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config, DataModelException, tag, db_transaction, storage, permission, _basequery)
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from data.database import (
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Repository, Namespace, RepositoryTag, Star, Image, ImageStorage, User, Visibility,
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RepositoryPermission, RepositoryActionCount, Role, RepositoryAuthorizedEmail,
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DerivedStorageForImage, Label, db_for_update, get_epoch_timestamp,
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db_random_func, db_concat_func, RepositorySearchScore, RepositoryKind, ApprTag,
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ManifestLegacyImage, Manifest, ManifestChild)
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from data.text import prefix_search
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from util.itertoolrecipes import take
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logger = logging.getLogger(__name__)
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SEARCH_FIELDS = Enum("SearchFields", ["name", "description"])
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class RepoStateConfigException(Exception):
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""" Repository.state value requires further configuration to operate. """
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pass
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def get_repo_kind_name(repo):
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return Repository.kind.get_name(repo.kind_id)
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def get_repository_count():
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return Repository.select().count()
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def get_public_repo_visibility():
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return _basequery.get_public_repo_visibility()
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def create_repository(namespace, name, creating_user, visibility='private', repo_kind='image',
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description=None):
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namespace_user = User.get(username=namespace)
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yesterday = datetime.now() - timedelta(days=1)
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with db_transaction():
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repo = Repository.create(name=name, visibility=Repository.visibility.get_id(visibility),
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namespace_user=namespace_user,
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kind=Repository.kind.get_id(repo_kind),
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description=description)
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RepositoryActionCount.create(repository=repo, count=0, date=yesterday)
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RepositorySearchScore.create(repository=repo, score=0)
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# Note: We put the admin create permission under the transaction to ensure it is created.
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if creating_user and not creating_user.organization:
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admin = Role.get(name='admin')
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RepositoryPermission.create(user=creating_user, repository=repo, role=admin)
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# Apply default permissions (only occurs for repositories under organizations)
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if creating_user and not creating_user.organization and creating_user.username != namespace:
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permission.apply_default_permissions(repo, creating_user)
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return repo
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def get_repository(namespace_name, repository_name, kind_filter=None):
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try:
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return _basequery.get_existing_repository(namespace_name, repository_name,
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kind_filter=kind_filter)
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except Repository.DoesNotExist:
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return None
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def get_or_create_repository(namespace, name, creating_user, visibility='private',
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repo_kind='image'):
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repo = get_repository(namespace, name, repo_kind)
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if repo is None:
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repo = create_repository(namespace, name, creating_user, visibility, repo_kind)
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return repo
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@ttl_cache(maxsize=1, ttl=600)
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def _get_gc_expiration_policies():
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policy_tuples_query = (
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Namespace.select(Namespace.removed_tag_expiration_s).distinct()
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.limit(100) # This sucks but it's the only way to limit memory
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.tuples())
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return [policy[0] for policy in policy_tuples_query]
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def get_random_gc_policy():
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""" Return a single random policy from the database to use when garbage collecting.
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"""
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return random.choice(_get_gc_expiration_policies())
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def find_repository_with_garbage(limit_to_gc_policy_s):
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expiration_timestamp = get_epoch_timestamp() - limit_to_gc_policy_s
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try:
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candidates = (RepositoryTag.select(RepositoryTag.repository).join(Repository)
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.join(Namespace, on=(Repository.namespace_user == Namespace.id))
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.where(~(RepositoryTag.lifetime_end_ts >> None),
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(RepositoryTag.lifetime_end_ts <= expiration_timestamp),
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(Namespace.removed_tag_expiration_s == limit_to_gc_policy_s)).limit(500)
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.distinct().alias('candidates'))
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found = (RepositoryTag.select(candidates.c.repository_id).from_(candidates)
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.order_by(db_random_func()).get())
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if found is None:
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return
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return Repository.get(Repository.id == found.repository_id)
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except RepositoryTag.DoesNotExist:
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return None
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except Repository.DoesNotExist:
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return None
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def star_repository(user, repository):
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""" Stars a repository. """
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star = Star.create(user=user.id, repository=repository.id)
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star.save()
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def unstar_repository(user, repository):
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""" Unstars a repository. """
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try:
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(Star.delete().where(Star.repository == repository.id, Star.user == user.id).execute())
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except Star.DoesNotExist:
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raise DataModelException('Star not found.')
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def set_trust(repo, trust_enabled):
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repo.trust_enabled = trust_enabled
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repo.save()
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def set_description(repo, description):
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repo.description = description
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repo.save()
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def get_user_starred_repositories(user, kind_filter='image'):
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""" Retrieves all of the repositories a user has starred. """
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try:
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repo_kind = Repository.kind.get_id(kind_filter)
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except RepositoryKind.DoesNotExist:
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raise DataModelException('Unknown kind of repository')
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query = (Repository.select(Repository, User, Visibility, Repository.id.alias('rid')).join(Star)
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.switch(Repository).join(User).switch(Repository).join(Visibility)
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.where(Star.user == user, Repository.kind == repo_kind))
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return query
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def repository_is_starred(user, repository):
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""" Determines whether a user has starred a repository or not. """
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try:
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(Star.select().where(Star.repository == repository.id, Star.user == user.id).get())
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return True
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except Star.DoesNotExist:
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return False
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def get_stars(repository_ids):
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""" Returns a map from repository ID to the number of stars for each repository in the
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given repository IDs list.
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"""
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if not repository_ids:
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return {}
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tuples = (Star.select(Star.repository, fn.Count(Star.id))
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.where(Star.repository << repository_ids).group_by(Star.repository).tuples())
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star_map = {}
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for record in tuples:
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star_map[record[0]] = record[1]
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return star_map
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def get_visible_repositories(username, namespace=None, kind_filter='image', include_public=False,
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start_id=None, limit=None):
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""" Returns the repositories visible to the given user (if any).
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"""
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if not include_public and not username:
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# Short circuit by returning a query that will find no repositories. We need to return a query
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# here, as it will be modified by other queries later on.
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return Repository.select(Repository.id.alias('rid')).where(Repository.id == -1)
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query = (Repository.select(Repository.name,
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Repository.id.alias('rid'), Repository.description,
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Namespace.username, Repository.visibility, Repository.kind)
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.switch(Repository).join(Namespace, on=(Repository.namespace_user == Namespace.id)))
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user_id = None
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if username:
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# Note: We only need the permissions table if we will filter based on a user's permissions.
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query = query.switch(Repository).distinct().join(RepositoryPermission, JOIN.LEFT_OUTER)
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found_namespace = _get_namespace_user(username)
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if not found_namespace:
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return Repository.select(Repository.id.alias('rid')).where(Repository.id == -1)
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user_id = found_namespace.id
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query = _basequery.filter_to_repos_for_user(query, user_id, namespace, kind_filter,
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include_public, start_id=start_id)
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if limit is not None:
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query = query.limit(limit).order_by(SQL('rid'))
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return query
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def get_app_repository(namespace_name, repository_name):
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""" Find an application repository. """
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try:
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return _basequery.get_existing_repository(namespace_name, repository_name,
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kind_filter='application')
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except Repository.DoesNotExist:
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return None
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def get_app_search(lookup, search_fields=None, username=None, limit=50):
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if search_fields is None:
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search_fields = set([SEARCH_FIELDS.name.name])
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return get_filtered_matching_repositories(lookup, filter_username=username,
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search_fields=search_fields, repo_kind='application',
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offset=0, limit=limit)
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def _get_namespace_user(username):
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try:
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return User.get(username=username)
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except User.DoesNotExist:
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return None
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def get_filtered_matching_repositories(lookup_value, filter_username=None, repo_kind='image',
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offset=0, limit=25, search_fields=None):
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""" Returns an iterator of all repositories matching the given lookup value, with optional
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filtering to a specific user. If the user is unspecified, only public repositories will
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be returned.
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"""
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if search_fields is None:
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search_fields = set([SEARCH_FIELDS.description.name, SEARCH_FIELDS.name.name])
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# Build the unfiltered search query.
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unfiltered_query = _get_sorted_matching_repositories(lookup_value, repo_kind=repo_kind,
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search_fields=search_fields,
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include_private=filter_username is not None,
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ids_only=filter_username is not None)
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# Add a filter to the iterator, if necessary.
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if filter_username is not None:
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filter_user = _get_namespace_user(filter_username)
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if filter_user is None:
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return []
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iterator = _filter_repositories_visible_to_user(unfiltered_query, filter_user.id, limit,
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repo_kind)
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if offset > 0:
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take(offset, iterator)
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# Return the results.
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return list(take(limit, iterator))
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return list(unfiltered_query.offset(offset).limit(limit))
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def _filter_repositories_visible_to_user(unfiltered_query, filter_user_id, limit, repo_kind):
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encountered = set()
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chunk_count = limit * 2
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unfiltered_page = 0
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iteration_count = 0
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while iteration_count < 10: # Just to be safe
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# Find the next chunk's worth of repository IDs, paginated by the chunk size.
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unfiltered_page = unfiltered_page + 1
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found_ids = [r.id for r in unfiltered_query.paginate(unfiltered_page, chunk_count)]
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# Make sure we haven't encountered these results before. This code is used to handle
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# the case where we've previously seen a result, as pagination is not necessary
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# stable in SQL databases.
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unfiltered_repository_ids = set(found_ids)
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new_unfiltered_ids = unfiltered_repository_ids - encountered
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if not new_unfiltered_ids:
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break
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encountered.update(new_unfiltered_ids)
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# Filter the repositories found to only those visible to the current user.
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query = (Repository
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.select(Repository, Namespace)
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.distinct()
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.join(Namespace, on=(Namespace.id == Repository.namespace_user)).switch(Repository)
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.join(RepositoryPermission).where(Repository.id << list(new_unfiltered_ids)))
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filtered = _basequery.filter_to_repos_for_user(query, filter_user_id, repo_kind=repo_kind)
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# Sort the filtered repositories by their initial order.
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all_filtered_repos = list(filtered)
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all_filtered_repos.sort(key=lambda repo: found_ids.index(repo.id))
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# Yield the repositories in sorted order.
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for filtered_repo in all_filtered_repos:
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yield filtered_repo
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# If the number of found IDs is less than the chunk count, then we're done.
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if len(found_ids) < chunk_count:
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break
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iteration_count = iteration_count + 1
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def _get_sorted_matching_repositories(lookup_value, repo_kind='image', include_private=False,
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search_fields=None, ids_only=False):
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""" Returns a query of repositories matching the given lookup string, with optional inclusion of
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private repositories. Note that this method does *not* filter results based on visibility
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to users.
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"""
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select_fields = [Repository.id] if ids_only else [Repository, Namespace]
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if not lookup_value:
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# This is a generic listing of repositories. Simply return the sorted repositories based
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# on RepositorySearchScore.
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query = (Repository
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.select(*select_fields)
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.join(RepositorySearchScore)
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.order_by(RepositorySearchScore.score.desc()))
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else:
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if search_fields is None:
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search_fields = set([SEARCH_FIELDS.description.name, SEARCH_FIELDS.name.name])
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# Always search at least on name (init clause)
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clause = Repository.name.match(lookup_value)
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computed_score = RepositorySearchScore.score.alias('score')
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# If the description field is in the search fields, then we need to compute a synthetic score
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# to discount the weight of the description more than the name.
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if SEARCH_FIELDS.description.name in search_fields:
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clause = Repository.description.match(lookup_value) | clause
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cases = [(Repository.name.match(lookup_value), 100 * RepositorySearchScore.score),]
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computed_score = Case(None, cases, RepositorySearchScore.score).alias('score')
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select_fields.append(computed_score)
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query = (Repository.select(*select_fields)
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.join(RepositorySearchScore)
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.where(clause)
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.order_by(SQL('score').desc()))
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if repo_kind is not None:
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query = query.where(Repository.kind == Repository.kind.get_id(repo_kind))
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if not include_private:
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query = query.where(Repository.visibility == _basequery.get_public_repo_visibility())
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if not ids_only:
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query = (query
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.switch(Repository)
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.join(Namespace, on=(Namespace.id == Repository.namespace_user)))
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return query
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def lookup_repository(repo_id):
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try:
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return Repository.get(Repository.id == repo_id)
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except Repository.DoesNotExist:
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return None
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def is_repository_public(repository):
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return repository.visibility_id == _basequery.get_public_repo_visibility().id
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def repository_is_public(namespace_name, repository_name):
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try:
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(Repository.select().join(Namespace, on=(Repository.namespace_user == Namespace.id))
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.switch(Repository).join(Visibility).where(Namespace.username == namespace_name,
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Repository.name == repository_name,
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Visibility.name == 'public').get())
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return True
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except Repository.DoesNotExist:
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return False
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def set_repository_visibility(repo, visibility):
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visibility_obj = Visibility.get(name=visibility)
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if not visibility_obj:
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return
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repo.visibility = visibility_obj
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repo.save()
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def get_email_authorized_for_repo(namespace, repository, email):
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try:
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return (RepositoryAuthorizedEmail.select(RepositoryAuthorizedEmail, Repository, Namespace)
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.join(Repository).join(Namespace, on=(Repository.namespace_user == Namespace.id))
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.where(Namespace.username == namespace, Repository.name == repository,
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RepositoryAuthorizedEmail.email == email).get())
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except RepositoryAuthorizedEmail.DoesNotExist:
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return None
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def create_email_authorization_for_repo(namespace_name, repository_name, email):
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try:
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repo = _basequery.get_existing_repository(namespace_name, repository_name)
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except Repository.DoesNotExist:
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raise DataModelException('Invalid repository %s/%s' % (namespace_name, repository_name))
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return RepositoryAuthorizedEmail.create(repository=repo, email=email, confirmed=False)
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def confirm_email_authorization_for_repo(code):
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try:
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found = (RepositoryAuthorizedEmail.select(RepositoryAuthorizedEmail, Repository, Namespace)
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.join(Repository).join(Namespace, on=(Repository.namespace_user == Namespace.id))
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.where(RepositoryAuthorizedEmail.code == code).get())
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except RepositoryAuthorizedEmail.DoesNotExist:
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raise DataModelException('Invalid confirmation code.')
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found.confirmed = True
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found.save()
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return found
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def is_empty(namespace_name, repository_name):
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""" Returns if the repository referenced by the given namespace and name is empty. If the repo
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doesn't exist, returns True.
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"""
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try:
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tag.list_repository_tags(namespace_name, repository_name).limit(1).get()
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return False
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except RepositoryTag.DoesNotExist:
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return True
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def get_repository_state(namespace_name, repository_name):
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""" Return the Repository State if the Repository exists. Otherwise, returns None. """
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repo = get_repository(namespace_name, repository_name)
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if repo:
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return repo.state
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return None
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def set_repository_state(repo, state):
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repo.state = state
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repo.save()
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