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HarbormasterTargetEngine.php
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Sun, Jan 12, 12:47

HarbormasterTargetEngine.php
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<?php
final class HarbormasterTargetEngine extends Phobject {
private $viewer;
private $object;
private $autoTargetKeys;
public function setViewer(PhabricatorUser $viewer) {
$this->viewer = $viewer;
return $this;
}
public function getViewer() {
return $this->viewer;
}
public function setObject(HarbormasterBuildableInterface $object) {
$this->object = $object;
return $this;
}
public function getObject() {
return $this->object;
}
public function setAutoTargetKeys(array $auto_keys) {
$this->autoTargetKeys = $auto_keys;
return $this;
}
public function getAutoTargetKeys() {
return $this->autoTargetKeys;
}
public function buildTargets() {
$object = $this->getObject();
$viewer = $this->getViewer();
$step_map = $this->generateBuildStepMap($this->getAutoTargetKeys());
$buildable = HarbormasterBuildable::createOrLoadExisting(
$viewer,
$object->getHarbormasterBuildablePHID(),
$object->getHarbormasterContainerPHID());
$target_map = $this->generateBuildTargetMap($buildable, $step_map);
return $target_map;
}
/**
* Get a map of the @{class:HarbormasterBuildStep} objects for a list of
* autotarget keys.
*
* This method creates the steps if they do not yet exist.
*
* @param list<string> Autotarget keys, like `"core.arc.lint"`.
* @return map<string, object> Map of keys to step objects.
*/
private function generateBuildStepMap(array $autotargets) {
$viewer = $this->getViewer();
$autosteps = $this->getAutosteps($autotargets);
$autosteps = mgroup($autosteps, 'getBuildStepAutotargetPlanKey');
$plans = id(new HarbormasterBuildPlanQuery())
->setViewer($viewer)
->withPlanAutoKeys(array_keys($autosteps))
->needBuildSteps(true)
->execute();
$plans = mpull($plans, null, 'getPlanAutoKey');
// NOTE: When creating the plan and steps, we save the autokeys as the
// names. These won't actually be shown in the UI, but make the data more
// consistent for secondary consumers like typeaheads.
$step_map = array();
foreach ($autosteps as $plan_key => $steps) {
$plan = idx($plans, $plan_key);
if (!$plan) {
$plan = HarbormasterBuildPlan::initializeNewBuildPlan($viewer)
->setName($plan_key)
->setPlanAutoKey($plan_key);
}
$current = $plan->getBuildSteps();
$current = mpull($current, null, 'getStepAutoKey');
$new_steps = array();
foreach ($steps as $step_key => $step) {
if (isset($current[$step_key])) {
$step_map[$step_key] = $current[$step_key];
continue;
}
$new_step = HarbormasterBuildStep::initializeNewStep($viewer)
->setName($step_key)
->setClassName(get_class($step))
->setStepAutoKey($step_key);
$new_steps[$step_key] = $new_step;
}
if ($new_steps) {
$plan->openTransaction();
if (!$plan->getPHID()) {
$plan->save();
}
foreach ($new_steps as $step_key => $step) {
$step->setBuildPlanPHID($plan->getPHID());
$step->save();
$step->attachBuildPlan($plan);
$step_map[$step_key] = $step;
}
$plan->saveTransaction();
}
}
return $step_map;
}
/**
* Get all of the @{class:HarbormasterBuildStepImplementation} objects for
* a list of autotarget keys.
*
* @param list<string> Autotarget keys, like `"core.arc.lint"`.
* @return map<string, object> Map of keys to implementations.
*/
private function getAutosteps(array $autotargets) {
$all_steps = HarbormasterBuildStepImplementation::getImplementations();
$all_steps = mpull($all_steps, null, 'getBuildStepAutotargetStepKey');
// Make sure all the targets really exist.
foreach ($autotargets as $autotarget) {
if (empty($all_steps[$autotarget])) {
throw new Exception(
pht(
'No build step provides autotarget "%s"!',
$autotarget));
}
}
return array_select_keys($all_steps, $autotargets);
}
/**
* Get a list of @{class:HarbormasterBuildTarget} objects for a list of
* autotarget keys.
*
* If some targets or builds do not exist, they are created.
*
* @param HarbormasterBuildable A buildable.
* @param map<string, object> Map of keys to steps.
* @return map<string, object> Map of keys to targets.
*/
private function generateBuildTargetMap(
HarbormasterBuildable $buildable,
array $step_map) {
$viewer = $this->getViewer();
$initiator_phid = null;
if (!$viewer->isOmnipotent()) {
$initiator_phid = $viewer->getPHID();
}
$plan_map = mgroup($step_map, 'getBuildPlanPHID');
$builds = id(new HarbormasterBuildQuery())
->setViewer($viewer)
->withBuildablePHIDs(array($buildable->getPHID()))
->withBuildPlanPHIDs(array_keys($plan_map))
->needBuildTargets(true)
->execute();
$autobuilds = array();
foreach ($builds as $build) {
$plan_key = $build->getBuildPlan()->getPlanAutoKey();
$autobuilds[$plan_key] = $build;
}
$new_builds = array();
foreach ($plan_map as $plan_phid => $steps) {
$plan = head($steps)->getBuildPlan();
$plan_key = $plan->getPlanAutoKey();
$build = idx($autobuilds, $plan_key);
if ($build) {
// We already have a build for this set of targets, so we don't need
// to do any work. (It's possible the build is an older build that
// doesn't have all of the right targets if new autotargets were
// recently introduced, but we don't currently try to construct them.)
continue;
}
// NOTE: Normally, `applyPlan()` does not actually generate targets.
// We need to apply the plan in-process to perform target generation.
// This is fine as long as autotargets are empty containers that don't
// do any work, which they always should be.
PhabricatorWorker::setRunAllTasksInProcess(true);
try {
// NOTE: We might race another process here to create the same build
// with the same `planAutoKey`. The database will prevent this and
// using autotargets only currently makes sense if you just created the
// resource and "own" it, so we don't try to handle this, but may need
// to be more careful here if use of autotargets expands.
$build = $buildable->applyPlan($plan, array(), $initiator_phid);
PhabricatorWorker::setRunAllTasksInProcess(false);
} catch (Exception $ex) {
PhabricatorWorker::setRunAllTasksInProcess(false);
throw $ex;
}
$new_builds[] = $build;
}
if ($new_builds) {
$all_targets = id(new HarbormasterBuildTargetQuery())
->setViewer($viewer)
->withBuildPHIDs(mpull($new_builds, 'getPHID'))
->execute();
} else {
$all_targets = array();
}
foreach ($builds as $build) {
foreach ($build->getBuildTargets() as $target) {
$all_targets[] = $target;
}
}
$target_map = array();
foreach ($all_targets as $target) {
$target_key = $target
->getImplementation()
->getBuildStepAutotargetStepKey();
if (!$target_key) {
continue;
}
$target_map[$target_key] = $target;
}
$target_map = array_select_keys($target_map, array_keys($step_map));
return $target_map;
}
}

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