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DrydockRepositoryOperationUpdateWorker.php
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Fri, Nov 29, 23:38

DrydockRepositoryOperationUpdateWorker.php
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<?php
final class DrydockRepositoryOperationUpdateWorker
extends DrydockWorker {
protected function doWork() {
$operation_phid = $this->getTaskDataValue('operationPHID');
$hash = PhabricatorHash::digestForIndex($operation_phid);
$lock_key = 'drydock.operation:'.$hash;
$lock = PhabricatorGlobalLock::newLock($lock_key)
->lock(1);
try {
$operation = $this->loadOperation($operation_phid);
$this->handleUpdate($operation);
} catch (Exception $ex) {
$lock->unlock();
throw $ex;
}
$lock->unlock();
}
private function handleUpdate(DrydockRepositoryOperation $operation) {
$operation_state = $operation->getOperationState();
switch ($operation_state) {
case DrydockRepositoryOperation::STATE_WAIT:
$operation
->setOperationState(DrydockRepositoryOperation::STATE_WORK)
->save();
break;
case DrydockRepositoryOperation::STATE_WORK:
break;
case DrydockRepositoryOperation::STATE_DONE:
case DrydockRepositoryOperation::STATE_FAIL:
// No more processing for these requests.
return;
}
// TODO: We should probably check for other running operations with lower
// IDs and the same repository target and yield to them here? That is,
// enforce sequential evaluation of operations against the same target so
// that if you land "A" and then land "B", we always finish "A" first.
// For now, just let stuff happen in any order. We can't lease until
// we know we're good to move forward because we might deadlock if we do:
// we're waiting for another operation to complete, and that operation is
// waiting for a lease we're holding.
try {
$lease = $this->loadWorkingCopyLease($operation);
$interface = $lease->getInterface(
DrydockCommandInterface::INTERFACE_TYPE);
// No matter what happens here, destroy the lease away once we're done.
$lease->releaseOnDestruction(true);
// TODO: Some day, do useful things instead of running `git show`.
list($stdout) = $interface->execx('git show');
phlog($stdout);
} catch (PhabricatorWorkerYieldException $ex) {
throw $ex;
} catch (Exception $ex) {
$operation
->setOperationState(DrydockRepositoryOperation::STATE_FAIL)
->save();
throw $ex;
}
$operation
->setOperationState(DrydockRepositoryOperation::STATE_DONE)
->save();
// TODO: Once we have sequencing, we could awaken the next operation
// against this target after finishing or failing.
}
private function loadWorkingCopyLease(
DrydockRepositoryOperation $operation) {
$viewer = $this->getViewer();
// TODO: This is very similar to leasing in Harbormaster, maybe we can
// share some of the logic?
$lease_phid = $operation->getProperty('exec.leasePHID');
if ($lease_phid) {
$lease = id(new DrydockLeaseQuery())
->setViewer($viewer)
->withPHIDs(array($lease_phid))
->executeOne();
if (!$lease) {
throw new PhabricatorWorkerPermanentFailureException(
pht(
'Lease "%s" could not be loaded.',
$lease_phid));
}
} else {
$working_copy_type = id(new DrydockWorkingCopyBlueprintImplementation())
->getType();
$repository = $operation->getRepository();
$allowed_phids = $repository->getAutomationBlueprintPHIDs();
$authorizing_phid = $repository->getPHID();
$lease = DrydockLease::initializeNewLease()
->setResourceType($working_copy_type)
->setOwnerPHID($operation->getPHID())
->setAuthorizingPHID($authorizing_phid)
->setAllowedBlueprintPHIDs($allowed_phids);
$map = $this->buildRepositoryMap($operation);
$lease->setAttribute('repositories.map', $map);
$task_id = $this->getCurrentWorkerTaskID();
if ($task_id) {
$lease->setAwakenTaskIDs(array($task_id));
}
$operation
->setProperty('exec.leasePHID', $lease->getPHID())
->save();
$lease->queueForActivation();
}
if ($lease->isActivating()) {
throw new PhabricatorWorkerYieldException(15);
}
if (!$lease->isActive()) {
throw new PhabricatorWorkerPermanentFailureException(
pht(
'Lease "%s" never activated.',
$lease->getPHID()));
}
return $lease;
}
private function buildRepositoryMap(DrydockRepositoryOperation $operation) {
$repository = $operation->getRepository();
$target = $operation->getRepositoryTarget();
list($type, $name) = explode(':', $target, 2);
switch ($type) {
case 'branch':
$spec = array(
'branch' => $name,
);
break;
default:
throw new Exception(
pht(
'Unknown repository operation target type "%s" (in target "%s").',
$type,
$target));
}
$map = array();
$map[$repository->getCloneName()] = array(
'phid' => $repository->getPHID(),
'default' => true,
) + $spec;
return $map;
}
}

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