ArcanistScalaSBTLinter.php
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	<?php

	/**
	* Uses `sbt compile` to detect various warnings/errors in Scala code.
	*/
	final class ArcanistScalaSBTLinter extends ArcanistExternalLinter {

	public function getInfoName() {
	return 'sbt';
	}

	public function getInfoURI() {
	return 'http://www.scala-sbt.org';
	}

	public function getInfoDescription() {
	return pht('sbt is a build tool for Scala, Java, and more.');
	}

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

	public function getLinterConfigurationName() {
	return 'scala-sbt';
	}

	public function getDefaultBinary() {
	$prefix = $this->getDeprecatedConfiguration('lint.scala_sbt.prefix');
	$bin = 'sbt';

	if ($prefix) {
	return $prefix.'/'.$bin;
	} else {
	return $bin;
	}
	}

	public function getVersion() {
	// NOTE: `sbt --version` returns a non-zero exit status.
	list($err, $stdout) = exec_manual(
	'%C --version',
	$this->getExecutableCommand());

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

	public function getInstallInstructions() {
	return pht(
	'Check <http://www.scala-sbt.org> for installation instructions.');
	}

	public function shouldExpectCommandErrors() {
	return true;
	}

	protected function getMandatoryFlags() {
	return array(
	'-Dsbt.log.noformat=true',
	'compile',
	);
	}

	protected function parseLinterOutput($path, $err, $stdout, $stderr) {
	$lines = phutil_split_lines($stdout, false);
	$messages = array();

	foreach ($lines as $line) {
	$matches = null;
	$regex = '/\[(warn\|error)\] (.?):(\d+): (.?)$/';
	if (!preg_match($regex, $line, $matches)) {
	continue;
	}
	foreach ($matches as $key => $match) {
	$matches[$key] = trim($match);
	}

	$message = new ArcanistLintMessage();
	$message->setPath($matches[2]);
	$message->setLine($matches[3]);
	$message->setCode($this->getLinterName());
	$message->setDescription($matches[4]);

	switch ($matches[1]) {
	case 'error':
	$message->setSeverity(ArcanistLintSeverity::SEVERITY_ERROR);
	break;
	case 'warn':
	$message->setSeverity(ArcanistLintSeverity::SEVERITY_WARNING);
	break;
	default:
	$message->setSeverity(ArcanistLintSeverity::SEVERITY_ADVICE);
	break;
	}

	$messages[] = $message;
	}

	return $messages;
	}

	}

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