migrate-differential-dependencies.php
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	<?php

	echo "Migrating differential dependencies to edges...\n";
	$table = new DifferentialRevision();
	$table->openTransaction();

	foreach (new LiskMigrationIterator($table) as $rev) {
	$id = $rev->getID();
	echo "Revision {$id}: ";

	$deps = $rev->getAttachedPHIDs(PhabricatorPHIDConstants::PHID_TYPE_DREV);
	if (!$deps) {
	echo "-\n";
	continue;
	}

	$editor = new PhabricatorEdgeEditor();
	$editor->setSuppressEvents(true);
	foreach ($deps as $dep) {
	$editor->addEdge(
	$rev->getPHID(),
	PhabricatorEdgeConfig::TYPE_DREV_DEPENDS_ON_DREV,
	$dep);
	}
	$editor->save();
	echo "OKAY\n";
	}

	$table->saveTransaction();
	echo "Done.\n";