ArcanistRubyLinter.php
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ArcanistRubyLinter.php
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	<?php

	/**
	* Uses `ruby` to detect various errors in Ruby code.
	*
	* @group linter
	*/
	final class ArcanistRubyLinter extends ArcanistExternalLinter {

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

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

	public function getDefaultBinary() {
	// TODO: Deprecation warning.
	$config = $this->getEngine()->getConfigurationManager();
	$prefix = $config->getConfigFromAnySource('lint.ruby.prefix');
	if ($prefix !== null) {
	$ruby_bin = $prefix.'ruby';
	}

	return 'ruby';
	}

	public function getInstallInstructions() {
	return pht('Install `ruby` from <http://www.ruby-lang.org/>.');
	}

	public function supportsReadDataFromStdin() {
	return true;
	}

	public function shouldExpectCommandErrors() {
	return true;
	}

	protected function getMandatoryFlags() {
	// -w: turn on warnings
	// -c: check syntax
	return '-w -c';
	}

	protected function getDefaultMessageSeverity($code) {
	return ArcanistLintSeverity::SEVERITY_ERROR;
	}

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

	$messages = array();
	foreach ($lines as $line) {
	$matches = null;

	if (!preg_match("/(.?):(\d+): (.?)$/", $line, $matches)) {
	continue;
	}

	foreach ($matches as $key => $match) {
	$matches[$key] = trim($match);
	}

	$code = head(explode(',', $matches[3]));

	$message = new ArcanistLintMessage();
	$message->setPath($path);
	$message->setLine($matches[2]);
	$message->setCode($this->getLinterName());
	$message->setName(pht('Syntax Error'));
	$message->setDescription($matches[3]);
	$message->setSeverity($this->getLintMessageSeverity($code));

	$messages[] = $message;
	}

	if ($err && !$messages) {
	return false;
	}

	return $messages;
	}

	}

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