The Gatekeeper, or a project gating system
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from zuul import model
from zuul.lib.logutil import get_annotated_logger
from zuul.manager import PipelineManager, DynamicChangeQueueContextManager
class IndependentPipelineManager(PipelineManager):
"""PipelineManager that puts every Change into its own ChangeQueue."""
changes_merge = False
def _postConfig(self, layout):
super(IndependentPipelineManager, self)._postConfig(layout)
def getChangeQueue(self, change, event, existing=None):
log = get_annotated_logger(self.log, event)
# We ignore any shared change queues on the pipeline and
# instead create a new change queue for every change.
if existing:
return DynamicChangeQueueContextManager(existing)
change_queue = model.ChangeQueue(self.pipeline)
change_queue.addProject(change.project)
self.pipeline.addQueue(change_queue)
log.debug("Dynamically created queue %s", change_queue)
return DynamicChangeQueueContextManager(change_queue)
def enqueueChangesAhead(self, change, event, quiet, ignore_requirements,
change_queue, history=None):
log = get_annotated_logger(self.log, event)
if hasattr(change, 'number'):
history = history or []
history = history + [change]
else:
# Don't enqueue dependencies ahead of a non-change ref.
return True
ret = self.checkForChangesNeededBy(change, change_queue, event)
if ret in [True, False]:
return ret
log.debug(" Changes %s must be merged ahead of %s" % (ret, change))
for needed_change in ret:
# This differs from the dependent pipeline by enqueuing
# changes ahead as "not live", that is, not intended to
# have jobs run. Also, pipeline requirements are always
# ignored (which is safe because the changes are not
# live).
r = self.addChange(needed_change, event, quiet=True,
ignore_requirements=True,
live=False, change_queue=change_queue,
history=history)
if not r:
return False
return True
def checkForChangesNeededBy(self, change, change_queue, event):
log = get_annotated_logger(self.log, event)
if self.pipeline.ignore_dependencies:
return True
log.debug("Checking for changes needed by %s:" % change)
# Return true if okay to proceed enqueing this change,
# false if the change should not be enqueued.
if (hasattr(change, 'commit_needs_changes') and
(change.refresh_deps or change.commit_needs_changes is None)):
self.updateCommitDependencies(change, None, event)
if not hasattr(change, 'needs_changes'):
log.debug(" %s does not support dependencies" % type(change))
return True
if not change.needs_changes:
log.debug(" No changes needed")
return True
changes_needed = []
for needed_change in change.needs_changes:
log.debug(" Change %s needs change %s:" % (
change, needed_change))
if needed_change.is_merged:
log.debug(" Needed change is merged")
continue
if self.isChangeAlreadyInQueue(needed_change, change_queue):
log.debug(" Needed change is already ahead in the queue")
continue
log.debug(" Change %s is needed" % needed_change)
if needed_change not in changes_needed:
changes_needed.append(needed_change)
continue
# This differs from the dependent pipeline check in not
# verifying that the dependent change is mergable.
if changes_needed:
return changes_needed
return True
def dequeueItem(self, item):
super(IndependentPipelineManager, self).dequeueItem(item)
# An independent pipeline manager dynamically removes empty
# queues
if not item.queue.queue:
self.pipeline.removeQueue(item.queue)