Differential D3959 Diff 10994 arcanist/linter/ShellCheckLinter.php

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arcanist/linter/ShellCheckLinter.php

This file was added.

				<?php

				/**
				* Uses the ShellCheck tool to run static analysis on shell scripts
				*/
				final class ShellCheckLinter extends ArcanistExternalLinter {
				const SHELLCHECK_EXCLUDED_RULES = array(
				// phpcs:disable Generic.Files.LineLength.TooLong
				// phpcs:disable Generic.Files.LineLength.MaxExceeded
				'SC2001', // See if you can use ${variable//search/replace} instead.
				'SC2004', // $/${} is unnecessary on arithmetic variables.
				'SC2005', // Useless echo? Instead of 'echo $(cmd)', just use 'cmd'.
				'SC2006', // Use $(..) instead of legacy `..`.
				'SC2016', // Expressions don't expand in single quotes, use double quotes for that.
				'SC2028', // echo won't expand escape sequences. Consider printf.
				'SC2046', // Quote this to prevent word splitting.
				'SC2048', // Use "$@" (with quotes) to prevent whitespace problems.
				'SC2066', // Since you double quoted this, it will not word split, and the loop will only run once.
				'SC2086', // Double quote to prevent globbing and word splitting.
				'SC2116', // Useless echo? Instead of 'cmd $(echo foo)', just use 'cmd foo'.
				'SC2148', // Tips depend on target shell and yours is unknown. Add a shebang.
				'SC2162', // read without -r will mangle backslashes.
				'SC2166', // Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.
				'SC2166', // Prefer [ p ] \|\| [ q ] as [ p -o q ] is not well defined.
				'SC2181', // Check exit code directly with e.g. 'if mycmd;', not indirectly with $?.
				// phpcs:enable
				);

				const SHELLCHECK_SEVERITY_MAP = array(
				'note' => ArcanistLintSeverity::SEVERITY_ADVICE,
				'warning' => ArcanistLintSeverity::SEVERITY_WARNING,
				'error' => ArcanistLintSeverity::SEVERITY_ERROR,
				);

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

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

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

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

				public function getDefaultBinary() {
				return 'shellcheck';
				}

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

				public function shouldExpectCommandErrors() {
				return true;
				}

				protected function getMandatoryFlags() {
				return array(
				'--format=gcc',
				'--exclude='.implode(',', self::SHELLCHECK_EXCLUDED_RULES));
				}

				private function getSeverity($severity) {
				if (array_key_exists($severity, self::SHELLCHECK_SEVERITY_MAP)) {
				return self::SHELLCHECK_SEVERITY_MAP[$severity];
				}

				return ArcanistLintSeverity::SEVERITY_ERROR;
				}

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

				$pattern = '/(.+):(\d+):(\d+): (.+): (.+) \[(SC\d+)\]/';
				if (preg_match_all($pattern, $stdout, $errors, PREG_SET_ORDER)) {
				foreach ($errors as $error) {
				list(, $file, $line, $char, $severity, $message, $code) = $error;

				$messages[] = id(new ArcanistLintMessage())
				->setGranularity(ArcanistLinter::GRANULARITY_FILE)
				->setPath($path)
				->setLine($line)
				->setChar($char)
				->setCode($code)
				->setSeverity($this->getSeverity($severity))
				->setName('ShellCheck found an issue:')
				->setDescription($message);
				}
				}

				return $messages;
				}
				}