Merge two Pinboard tags into one, or rename a tag.

pinboard-rename-tag.php

#!/usr/bin/env php
<?php

if (!isset($argv[2]))
{
  echo "${argv[0]} FROM TO\n";
  exit(1);
}

include 'pinboard-api.php'; // https://github.com/kijin/pinboard-api
$pinboard = new PinboardAPI('lyoshenka', 'password');

echo "From ${argv[1]} to ${argv[2]}\n";

$all = $pinboard->get_all(null,null,array($argv[1]));

foreach ($all as $bookmark)
{
  echo $bookmark->url . "\n";
  echo implode(' ',$bookmark->tags) . "   =>   ";
  $bookmark->tags = preg_replace('/(^| )'.preg_quote($argv[1],'/').'( |$)/', '$1'.$argv[2].'$2', implode(' ', $bookmark->tags));
  echo $bookmark->tags . "\n";
  $bookmark->save();
  sleep(3); // honor API rate limit
}