#melbsf2 Symfony Components: Using the Process component (see http://samjarrett.github.io/Symfony2-Components-Presentation/pres.html)

convert.php

<?php

use Symfony\Component\Process\Process;

$process = new Process('svn2git ' . $svnHref);
$process->setTimeout(3600);
$process->run(function ($type, $buffer) {
  if (Process::ERR === $type) {
    $output->write('<error>' . $buffer . '</error>');
  } else {
    $output->write($buffer); // $buffer will include EOL
  }
});