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DrydockWorkingCopyBlueprintImplementation.php
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Sat, Jan 25, 21:42

DrydockWorkingCopyBlueprintImplementation.php
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<?php
final class DrydockWorkingCopyBlueprintImplementation
extends DrydockBlueprintImplementation {
public function isEnabled() {
return true;
}
public function getBlueprintName() {
return pht('Working Copy');
}
public function getDescription() {
return pht('Allows Drydock to check out working copies of repositories.');
}
public function canAnyBlueprintEverAllocateResourceForLease(
DrydockLease $lease) {
return true;
}
public function canEverAllocateResourceForLease(
DrydockBlueprint $blueprint,
DrydockLease $lease) {
return true;
}
public function canAllocateResourceForLease(
DrydockBlueprint $blueprint,
DrydockLease $lease) {
return true;
}
public function canAcquireLeaseOnResource(
DrydockBlueprint $blueprint,
DrydockResource $resource,
DrydockLease $lease) {
$have_phid = $resource->getAttribute('repositoryPHID');
$need_phid = $lease->getAttribute('repositoryPHID');
if ($need_phid !== $have_phid) {
return false;
}
if (!DrydockSlotLock::isLockFree($this->getLeaseSlotLock($resource))) {
return false;
}
return true;
}
public function acquireLease(
DrydockBlueprint $blueprint,
DrydockResource $resource,
DrydockLease $lease) {
$lease
->needSlotLock($this->getLeaseSlotLock($resource))
->acquireOnResource($resource);
}
private function getLeaseSlotLock(DrydockResource $resource) {
$resource_phid = $resource->getPHID();
return "workingcopy.lease({$resource_phid})";
}
public function allocateResource(
DrydockBlueprint $blueprint,
DrydockLease $lease) {
$repository_phid = $lease->getAttribute('repositoryPHID');
$repository = $this->loadRepository($repository_phid);
$resource = $this->newResourceTemplate(
$blueprint,
pht(
'Working Copy (%s)',
$repository->getCallsign()));
$resource_phid = $resource->getPHID();
$host_lease = $this->newLease($blueprint)
->setResourceType('host')
->setOwnerPHID($resource_phid)
->setAttribute('workingcopy.resourcePHID', $resource_phid)
->queueForActivation();
// TODO: Add some limits to the number of working copies we can have at
// once?
return $resource
->setAttribute('repositoryPHID', $repository->getPHID())
->setAttribute('host.leasePHID', $host_lease->getPHID())
->allocateResource();
}
public function activateResource(
DrydockBlueprint $blueprint,
DrydockResource $resource) {
$lease = $this->loadHostLease($resource);
$this->requireActiveLease($lease);
$repository_phid = $resource->getAttribute('repositoryPHID');
$repository = $this->loadRepository($repository_phid);
$repository_id = $repository->getID();
$command_type = DrydockCommandInterface::INTERFACE_TYPE;
$interface = $lease->getInterface($command_type);
// TODO: Make this configurable.
$resource_id = $resource->getID();
$root = "/var/drydock/workingcopy-{$resource_id}";
$path = "{$root}/repo/{$repository_id}/";
$interface->execx(
'git clone -- %s %s',
(string)$repository->getCloneURIObject(),
$path);
$resource
->setAttribute('workingcopy.root', $root)
->setAttribute('workingcopy.path', $path)
->activateResource();
}
public function activateLease(
DrydockBlueprint $blueprint,
DrydockResource $resource,
DrydockLease $lease) {
$command_type = DrydockCommandInterface::INTERFACE_TYPE;
$interface = $lease->getInterface($command_type);
$cmd = array();
$arg = array();
$cmd[] = 'git clean -d --force';
$cmd[] = 'git reset --hard HEAD';
$cmd[] = 'git fetch';
$commit = $lease->getAttribute('commit');
$branch = $lease->getAttribute('branch');
if ($commit !== null) {
$cmd[] = 'git reset --hard %s';
$arg[] = $commit;
} else if ($branch !== null) {
$cmd[] = 'git reset --hard %s';
$arg[] = $branch;
}
$cmd = implode(' && ', $cmd);
$argv = array_merge(array($cmd), $arg);
$result = call_user_func_array(
array($interface, 'execx'),
$argv);
$lease->activateOnResource($resource);
}
public function getType() {
return 'working-copy';
}
public function getInterface(
DrydockBlueprint $blueprint,
DrydockResource $resource,
DrydockLease $lease,
$type) {
switch ($type) {
case DrydockCommandInterface::INTERFACE_TYPE:
$host_lease = $this->loadHostLease($resource);
$command_interface = $host_lease->getInterface($type);
$path = $resource->getAttribute('workingcopy.path');
$command_interface->setWorkingDirectory($path);
return $command_interface;
}
}
private function loadRepository($repository_phid) {
$repository = id(new PhabricatorRepositoryQuery())
->setViewer(PhabricatorUser::getOmnipotentUser())
->withPHIDs(array($repository_phid))
->executeOne();
if (!$repository) {
// TODO: Permanent failure.
throw new Exception(
pht(
'Repository PHID "%s" does not exist.',
$repository_phid));
}
switch ($repository->getVersionControlSystem()) {
case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
break;
default:
// TODO: Permanent failure.
throw new Exception(pht('Unsupported VCS!'));
}
return $repository;
}
private function loadHostLease(DrydockResource $resource) {
$viewer = PhabricatorUser::getOmnipotentUser();
$lease_phid = $resource->getAttribute('host.leasePHID');
$lease = id(new DrydockLeaseQuery())
->setViewer($viewer)
->withPHIDs(array($lease_phid))
->executeOne();
if (!$lease) {
// TODO: Permanent failure.
throw new Exception(pht('Unable to load lease "%s".', $lease_phid));
}
return $lease;
}
}

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