Differential D2705 Diff 7810 arcanist/linter/LocalDependenceLinter.php

Changeset View

Standalone View

arcanist/linter/LocalDependenceLinter.php

This file was added.

				<?php

				/**
				* Uses the lint-locale-dependence.sh script to output an error when functions
				* relying on the system locale are used.
				*/
				final class LocaleDependenceLinter extends ArcanistExternalLinter {

				const ADVICE_MESSAGE =
				'Unnecessary locale dependence can cause bugs and should be avoided. '.
				'Otherwise an exception can be added to the lint-locale-dependence script.';

				public function getInfoName() {
				return 'lint-locale-dependence';
				}

				public function getInfoURI() {
				return '';
				}

				public function getInfoDescription() {
				return pht('Throw an error when functions relying on the system locale '.
				'are used.');
				}

				public function getLinterName() {
				return 'lint-locale-dependence';
				}

				public function getLinterConfigurationName() {
				return 'lint-locale-dependence';
				}

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

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

				public function getDefaultBinary() {
				return Filesystem::resolvePath(
				'test/lint/lint-locale-dependence.sh',
				$this->getProjectRoot());
				}

				public function shouldUseInterpreter() {
				return true;
				}

				public function getDefaultInterpreter() {
				return "bash";
				}

				public function getInstallInstructions() {
				return pht('The test/lint/lint-locale-dependence.sh script is part of the
				bitcoin-abc project. Requires git >= 2.6.5.');
				}

				public function shouldExpectCommandErrors() {
				return false;
				}

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

				protected function parseLinterOutput($path, $err, $stdout, $stderr) {
				/*
				* Stdout contains 2 sections:
				* 1/ The locale dependent function in a sentence:
				* The locale dependent function <function>(...) appears to be used
				* Followed by the file and the corresponding code lines
				* <file path>: <code line using the function>
				* 2/ Section with a general warning, will not be used by Arcanist. Instead
				* we define our own advice message.
				*
				* First a list of the locale dependent functions will be determined, then
				* the code lines containing these functions.
				* An error message is generated for each line of code.
				*/

				/*
				* Extract infos from the path
				*/
				$pathinfo = pathinfo($path);
				$fileName = $pathinfo['basename'];

				$messages = [];

				/* Find the functions */
				$pattern = '/The locale dependent function (\w+)$...$/';
				if (!preg_match_all($pattern, $stdout, $matches, $flags = PREG_SET_ORDER)) {
				return $messages;
				}

				$functions = [];
				foreach($matches as $match) {
				$functions[] = $match[1];
				}

				/* Find the code lines */
				$pattern = '/'.$fileName.':(\d+): (.+)/';
				if (preg_match_all($pattern, $stdout, $matches, $flags = PREG_SET_ORDER)) {
				foreach ($matches as $match) {
				list(, $lineNumber, $codeSnippet) = $match;

				/* Determine which function is used */
				$functionUsed = '';
				foreach($functions as $function) {
				if (strpos($codeSnippet, $function) !== FALSE) {
				$functionUsed = $function;
				break;
				}
				}

				$messages[] = id(new ArcanistLintMessage())
				->setGranularity(ArcanistLinter::GRANULARITY_FILE)
				->setCode('LOCALE_DEPENDENCE')
				->setPath($path)
				->setLine($lineNumber)
				->setSeverity(ArcanistLintSeverity::SEVERITY_ERROR)
				->setName('Locale dependent function '.$functionUsed)
				->setDescription(self::ADVICE_MESSAGE);
				}
				}

				return $messages;
				}
				}