pre-commit Code Sniffer

pre-commit.php

#!/usr/bin/php
<?php
$cs                = 'phpcs';
$md                = 'phpmd';
$output            = [];
$return            = 0;
$defaultCsStandard = 'PSR2';
$defaultMdRules    = 'codesize,cleancode,controversial,unusedcode,naming,design';

$gitRoot   = exec('git rev-parse --show-toplevel', $output);
$csRuleSet = $gitRoot . '/lint/phpcs/ruleset.xml';
$mdRuleSet = $gitRoot . '/lint/phpmd/ruleset.xml';

$csStandard = file_exists($csRuleSet) ? $csRuleSet : $defaultCsStandard;
$mdRules    = file_exists($mdRuleSet) ? $mdRuleSet : $defaultMdRules;

exec('git rev-parse --verify HEAD 2> /dev/null', $output, $return);

// Get GIT revision
$against = $return === 0 ? 'HEAD' : '4b825dc642cb6eb9a060e54bf8d69288fbee4904';

// Get the list of files in this commit.
exec($commandDiff = "git diff-index --name-only {$against}", $output);

$filename_pattern = '/(\.php|\.phtml)$/';
$exitStatus       = 0;

// Loop through files.
foreach ($output as $file) {
    echo "Validating $file\n";
    if (!preg_match($filename_pattern, $file)) {
        continue; // don't check files that aren't PHP
    }

    if (!file_exists($file)) {
        continue; // If file is removed from git do not sniff.
    }

    $csOutput = [];
    // Run the sniff
    exec("$cs --standard=$csStandard " . escapeshellarg($file), $csOutput, $return);
    if ($return !== 0) {
        echo implode("\n", $csOutput), "\n";
        $exitStatus = 1;
    }

    // Run PHPMD
    exec("$md " . escapeshellarg($file) . " text $mdRules", $mdOutput, $return);
    if ($return !== 0) {
        echo implode("\n", $mdOutput), "\n";
        $exitStatus = 1;
    }
}

exit($exitStatus);