PHP code to count who was last to commit each line of code (uses svn blame)

count_svn_blame.php

<?php

    function is_library($filename)
    {
        static $libraryNames = array(
            '/Zend/',
            '/html2ps',
            '/simpletest/',
            '/phpMailer/',
            '/dompdf',
            '/nusoap',
        );
    
        foreach($libraryNames as $libraryName)
        {
            if(strpos($filename, $libraryName) !== false)
            {
                return true;
            }
        }
    
        return false;
    }
    
    function svn_blame_count($filename, &$counter)
    {
        $filename_arg = escapeshellarg($filename);
        exec("svn blame $filename_arg", $output);
    
        foreach($output as $line)
        {
            // Blame output is:  (whitespace) revision (whitespace) name (whitespace) code
            preg_match('#^\s+(\d+)\s+([a-zA-Z]+)(.*)$#', $line, $matches);
    
            if(($matches === false) || (count($matches) === 0))
            {
                throw new Exception("Unable to parse svn blame in $filename.  Line: \"$line\"");
            }
    
            list(,$rev,$name,$text) = $matches;
    
            // Skip blank lines
            if(trim($text) === '')
            {
                continue;
            }
    
            if(!isset($counter))
            {
                $counter[$name] = 0;
            }
    
            $counter[$name]++;
        }
    }


    $counter  = array();

    $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator('/home/matthewd/b3/trunk/'));
    $objects  = new RegexIterator($iterator, '/^.+\.php$/i', RecursiveRegexIterator::GET_MATCH);
    
    foreach($objects as $filename => $object)
    {
        if(is_library($filename))
        {
            continue;
        }
    
        echo "Parsing: $filename\n";
        svn_blame_count($filename, $counter);
    }
    
    arsort($counter);
    foreach($counter as $name => $lines)
    {
        echo "$name => $lines\n";
    }