20140706.harbormasterdepend.1.php
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	<?php

	$plan_table = new HarbormasterBuildPlan();
	$step_table = new HarbormasterBuildStep();
	$conn_w = $plan_table->establishConnection('w');
	foreach (new LiskMigrationIterator($plan_table) as $plan) {

	echo pht(
	"Migrating build plan %d: %s...\n",
	$plan->getID(),
	$plan->getName());

	// Load all build steps in order using the step sequence.
	$steps = queryfx_all(
	$conn_w,
	'SELECT id FROM %T WHERE buildPlanPHID = %s ORDER BY sequence ASC;',
	$step_table->getTableName(),
	$plan->getPHID());

	$previous_step = null;
	foreach ($steps as $step) {
	$id = $step['id'];

	$loaded_step = id(new HarbormasterBuildStep())->load($id);

	$depends_on = $loaded_step->getDetail('dependsOn');
	if ($depends_on !== null) {
	// This plan already contains steps with depends_on set, so
	// we skip since there's nothing to migrate.
	break;
	}

	if ($previous_step === null) {
	$depends_on = array();
	} else {
	$depends_on = array($previous_step->getPHID());
	}

	$loaded_step->setDetail('dependsOn', $depends_on);
	queryfx(
	$conn_w,
	'UPDATE %T SET details = %s WHERE id = %d',
	$step_table->getTableName(),
	json_encode($loaded_step->getDetails()),
	$loaded_step->getID());

	$previous_step = $loaded_step;

	echo pht(
	" Migrated build step %d.\n",
	$loaded_step->getID());
	}

	}