ArcanistCpplintLinter.php
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	<?php

	/**
	* Uses Google's `cpplint.py` to check code.
	*/
	final class ArcanistCpplintLinter extends ArcanistExternalLinter {

	public function getLinterName() {
	return 'C++ Google\'s Styleguide';
	}

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

	public function getDefaultBinary() {
	return 'cpplint.py';
	}

	public function getInstallInstructions() {
	return pht(
	'Install cpplint.py using `%s`, and place it in your path with the '.
	'appropriate permissions set.',
	'wget https://raw.github.com'.
	'/google/styleguide/gh-pages/cpplint/cpplint.py');
	}

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

	protected function parseLinterOutput($path, $err, $stdout, $stderr) {
	$lines = explode("\n", $stderr);

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

	$severity = $this->getLintMessageSeverity($matches[3]);

	$message = new ArcanistLintMessage();
	$message->setPath($path);
	$message->setCode($matches[3]);
	$message->setName($matches[3]);
	$message->setDescription($matches[2]);
	$message->setSeverity($severity);

	// NOTE: "cpplint" raises some messages which apply to the whole file,
	// like "no #ifndef guard found". It raises these messages on line 0.

	// Arcanist messages should have a "null" line, not a "0" line, if they
	// aren't bound to a particular line number.

	$line = (int)$matches[1];
	if ($line > 0) {
	$message->setLine($line);
	}

	$messages[] = $message;
	}

	return $messages;
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	if (!preg_match('@^[a-z_]+/[a-z0-9_+]+$@', $code)) {
	throw new Exception(
	pht(
	'Unrecognized lint message code "%s". Expected a valid cpplint '.
	'lint code like "%s" or "%s".',
	$code,
	'build/include_order',
	'whitespace/braces'));
	}

	return $code;
	}

	}

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