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Editing File: /home/ubuntu/code_review/arcanist/src/repository/graph/query/ArcanistSimpleCommitGraphQuery.php

<?php

final class ArcanistSimpleCommitGraphQuery
  extends ArcanistCommitGraphQuery {

private $corpus;

public function setCorpus($corpus) {
    $this->corpus = $corpus;
    return $this;
  }

public function getCorpus() {
    return $this->corpus;
  }

public function execute() {
    $graph = $this->getGraph();
    $corpus = $this->getCorpus();

$edges = preg_split('(\s+)', trim($corpus));
    foreach ($edges as $edge) {
      $matches = null;
      $ok = preg_match('(^(?P<parent>\S+)>(?P<child>\S+)\z)', $edge, $matches);
      if (!$ok) {
        throw new Exception(
          pht(
            'Failed to match SimpleCommitGraph directive "%s".',
            $edge));
      }

$parent = $matches['parent'];
      $child = $matches['child'];

$pnode = $graph->getNode($parent);
      if (!$pnode) {
        $pnode = $graph->newNode($parent);
      }

$cnode = $graph->getNode($child);
      if (!$cnode) {
        $cnode = $graph->newNode($child);
      }

$cnode->addParentNode($pnode);
      $pnode->addChildNode($cnode);
    }
  }

}

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