Quick and dirty Drupal redirect importer

gistfile1.txt

<?php

// Loop through an array of urls keyed by old => new and create a redirect.
foreach ($urls as $old => $new) {
  $redirect = new stdClass();
  redirect_object_prepare($redirect);
  $redirect->source = $old;
  $redirect->redirect = $new;
  $redirect->language = LANGUAGE_NONE;
  // Check if the redirect exists before saving.
  $hash = redirect_hash($redirect);
  $existing = redirect_load_by_hash($hash);
  if (!$existing) {
    redirect_save($redirect);
  }
}

// Load and re-save all the redirects because the first save doesn't resolve
// drupal paths for whatever reason :/
$redirects = entity_load('redirect');
foreach ($redirects as $redirect) {
  redirect_save($redirect);
}