ArcanistJscsLinter.php
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	<?php

	final class ArcanistJscsLinter extends ArcanistExternalLinter {

	private $config;
	private $preset;

	public function getInfoName() {
	return 'JavaScript Code Style';
	}

	public function getInfoURI() {
	return 'https://github.com/mdevils/node-jscs';
	}

	public function getInfoDescription() {
	return pht(
	'Use `%s` to detect issues with Javascript source files.',
	'jscs');
	}

	public function getLinterName() {
	return 'JSCS';
	}

	public function getLinterConfigurationName() {
	return 'jscs';
	}

	public function getDefaultBinary() {
	return 'jscs';
	}

	public function getVersion() {
	list($stdout) = execx('%C --version', $this->getExecutableCommand());

	$matches = array();
	$regex = '/^(?P<version>\d+\.\d+\.\d+)$/';
	if (preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	}
	}

	public function getInstallInstructions() {
	return pht('Install JSCS using `%s`.', 'npm install -g jscs');
	}

	protected function getMandatoryFlags() {
	$options = array();

	$options[] = '--reporter=checkstyle';
	$options[] = '--no-colors';

	if ($this->config) {
	$options[] = '--config='.$this->config;
	}

	if ($this->preset) {
	$options[] = '--preset='.$this->preset;
	}

	return $options;
	}

	public function getLinterConfigurationOptions() {
	$options = array(
	'jscs.config' => array(
	'type' => 'optional string',
	'help' => pht('Pass in a custom %s file path.', 'jscsrc'),
	),
	'jscs.preset' => array(
	'type' => 'optional string',
	'help' => pht('Custom preset.'),
	),
	);

	return $options + parent::getLinterConfigurationOptions();
	}

	public function setLinterConfigurationValue($key, $value) {
	switch ($key) {
	case 'jscs.config':
	$this->config = $value;
	return;

	case 'jscs.preset':
	$this->preset = $value;
	return;
	}

	return parent::setLinterConfigurationValue($key, $value);
	}

	protected function parseLinterOutput($path, $err, $stdout, $stderr) {
	$report_dom = new DOMDocument();
	$ok = @$report_dom->loadXML($stdout);

	if (!$ok) {
	return false;
	}

	$messages = array();
	foreach ($report_dom->getElementsByTagName('file') as $file) {
	foreach ($file->getElementsByTagName('error') as $error) {
	$message = new ArcanistLintMessage();
	$message->setPath($path);
	$message->setLine($error->getAttribute('line'));
	$message->setChar($error->getAttribute('column'));
	$message->setCode('JSCS');
	$message->setName('JSCS');
	$message->setDescription($error->getAttribute('message'));

	switch ($error->getAttribute('severity')) {
	case 'error':
	$message->setSeverity(ArcanistLintSeverity::SEVERITY_ERROR);
	break;

	case 'warning':
	$message->setSeverity(ArcanistLintSeverity::SEVERITY_WARNING);
	break;

	default:
	$message->setSeverity(ArcanistLintSeverity::SEVERITY_ADVICE);
	break;
	}

	$messages[] = $message;
	}
	}

	return $messages;
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {

	// NOTE: We can't figure out which rule generated each message, so we
	// can not customize severities.
	//
	// See https://github.com/mdevils/node-jscs/issues/224

	throw new Exception(
	pht(
	"JSCS does not currently support custom severity levels, because ".
	"rules can't be identified from messages in output."));
	}

	}

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