another-take…

ClangFormatLinter.php
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			<?php

			/**
			* Uses the clang format to format C/C++/Obj-C code
			*/
			final class ClangFormatLinter extends ArcanistExternalLinter {

			public function getInfoName() {
			return 'clang-format';
			}

			public function getInfoURI() {
			return '';
			}

			public function getInfoDescription() {
			return pht('Use clang-format for processing specified files.');
			}

			public function getLinterName() {
			return 'clang-format';
			}

			public function getLinterConfigurationName() {
			return 'clang-format';
			}

			public function getLinterConfigurationOptions() {
			$options = array(
			);

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

			public function getDefaultBinary() {
			return 'clang-format';
			}

			public function getInstallInstructions() {
			return pht('Make sure clang-format is in directory specified by $PATH');
			}

			public function shouldExpectCommandErrors() {
			return false;
			}

			protected function getMandatoryFlags() {
			return array(
			);
			}

			protected function parseLinterOutput($path, $err, $stdout, $stderr) {
			$ok = ($err == 0);

			if (!$ok) {
			return false;
			}

			$orig = file_get_contents($path);
			if ($orig == $stdout) {
			return array();
			}

			$message = id(new ArcanistLintMessage())
			->setPath($path)
			->setLine(1)
			->setChar(1)
			->setGranularity(ArcanistLinter::GRANULARITY_FILE)
			->setCode('CFMT')
			->setSeverity(ArcanistLintSeverity::SEVERITY_AUTOFIX)
			->setName('Code style violation')
			->setDescription("'$path' has code style errors.")
			->setOriginalText($orig)
			->setReplacementText($stdout);
			return array($message);
			}
			}