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#
# Copyright (C) 2019 Bloomberg Finance LP
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
#
# Authors:
# James Ennis <james.ennis@codethink.co.uk>
from . import Element
from . import _cachekey
from ._exceptions import ArtifactElementError
from ._loader.metaelement import MetaElement
# ArtifactElement()
#
# Object to be used for directly processing an artifact
#
# Args:
# context (Context): The Context object
# ref (str): The artifact ref
#
class ArtifactElement(Element):
def __init__(self, context, ref):
_, element, key = verify_artifact_ref(ref)
self._ref = ref
self._key = key
project = context.get_toplevel_project()
meta = MetaElement(project, element) # NOTE element has no .bst suffix
plugin_conf = None
super().__init__(context, project, meta, plugin_conf)
# Override Element.get_artifact_name()
def get_artifact_name(self, key=None):
return self._ref
# Dummy configure method
def configure(self, node):
pass
# Dummy preflight method
def preflight(self):
pass
# Override Element._calculate_cache_key
def _calculate_cache_key(self, dependencies=None):
return self._key
# Override Element._get_cache_key()
def _get_cache_key(self, strength=None):
return self._key
# verify_artifact_ref()
#
# Verify that a ref string matches the format of an artifact
#
# Args:
# ref (str): The artifact ref
#
# Returns:
# project (str): The project's name
# element (str): The element's name
# key (str): The cache key
#
# Raises:
# ArtifactElementError if the ref string does not match
# the expected format
#
def verify_artifact_ref(ref):
try:
project, element, key = ref.split('/', 2) # This will raise a Value error if unable to split
# Explicitly raise a ValueError if the key lenght is not as expected
if len(key) != len(_cachekey.generate_key(_yaml.new_empty_node())):
raise ValueError
except ValueError:
raise ArtifactElementError("Artifact: {} is not of the expected format".format(ref))
return project, element, key
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