Get all versions of a specific file from svn

svn-version.php

<?php
/**
 * SVN-Version extractor of a specific file
 *
 * Get all versions of a specific file from svn
 */

// argument-handling
$aArgs = getopt('f:p:r:');
$iRevision = (true === empty($aArgs['r'])) ? 'HEAD' : $aArgs['r'];
if (empty($aArgs['f']) === true or empty($aArgs['p']) === true) {
    print_r(sprintf('usage: %s -f file -p svn-path', $argv[0]));
    exit;
}

/**
 * Class o
 */
class o {

    /**
     * Run a command
     *
     * @param  string $sCommand
     *
     * @return string
     */
    public function cmd($sCommand) {
        print_r(sprintf('running %s ...', $sCommand) . PHP_EOL);
        $rCommand = popen($sCommand, 'r');
        $sReturn = '';
        while (feof($rCommand) !== true) {
            $sReturn .= fread($rCommand, 4096);
        }

        pclose($rCommand);
        return $sReturn;
    }

    /**
     * Run the extraction
     *
     * @param  string $sFile
     * @param  string $sSvn
     * @param  mixed $mRevision
     *
     * @throws RuntimeException
     */
    public  function run($sFile, $sSvn, $mRevision) {
        print_r('reading history ...' . PHP_EOL);
        $sHistory = $this->cmd(sprintf('svn log --xml %s/%s@%s', $sSvn, $sFile, $mRevision));
        if (empty($sHistory) === true) {
            throw new RuntimeException('no result');
        }

        $aFile = explode(DIRECTORY_SEPARATOR, $sFile);
        $sLast = end($aFile);
        $aFile = explode('.', $sLast);

        $sDir = reset($aFile);
        $sDir = sprintf('%s-%s', date('Y-m-d'), $sDir);
        if (is_dir($sDir) === false) {
            mkdir($sDir, 0777, true);
        }

        $oXml = simplexml_load_string($sHistory);
        $iCount = count($oXml->children());
        $iCounter = 0;

        $aChildren = array();
        foreach ($oXml->children() as $oVersion) {
            ++$iCounter;
            $aChildren[$iCounter] = pcntl_fork();

            if ($aChildren[$iCounter] === -1) {
                unset($aChildren[$iCounter]);
            }
            elseif ($aChildren[$iCounter] === 0) {
                print_r(sprintf('fetching %d/%d ...', $iCounter, $iCount) . PHP_EOL);
                $this->cmd(sprintf('svn export -r %s %s/%s@%s %s/%s-%s', $oVersion->attributes()->revision, $sSvn, $sFile, $oVersion->attributes()->revision, $sDir, date('Y-m-d_Hi', strtotime($oVersion->date)), $sLast));
                exit;
            }
        }

        $iChildren = 0;
        do {
            $iStatus = null;
            $iPid = pcntl_waitpid(-1, $iStatus, WNOHANG);
            $bUnset = false;
            foreach ($aChildren as $sChild => $iChild) {
                if ($iChild === $iPid) {
                    unset($aChildren[$sChild]);
                    $bUnset = true;
                }
            }

            if ($bUnset === false) {
                usleep(10000);
            }

            $iChildren = count($aChildren);
        }
        while ($iChildren > 0);
    }
}

$o = new o();
$o->run($aArgs['f'], trim($aArgs['p'], ' /'), $iRevision);