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

/*
 * Copyright 2012 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

$root = dirname(dirname(dirname(__FILE__)));
require_once $root.'/scripts/__init_script__.php';

$args = new PhutilArgumentParser($argv);
$args->setTagline('permanently destroy a Differential Revision');
$args->setSynopsis(<<<EOHELP
**destroy_revision.php** __D123__
  Permanently destroy the specified Differential Revision (for example,
  because it contains secrets that the world is not ready to know).

  Normally, you can just "Abandon" unwanted revisions, but in dire
  circumstances this script can be used to completely destroy a
  revision. Destroying a revision may cause some glitches in
  linked objects.

  The revision is utterly destroyed and can not be recovered unless you
  have backups.
EOHELP
);
$args->parseStandardArguments();
$args->parse(
  array(
    array(
      'name'      => 'revision',
      'wildcard'  => true,
    ),
  ));

$revisions = $args->getArg('revision');
if (count($revisions) != 1) {
  $args->printHelpAndExit();
}

$id = trim(strtolower(head($revisions)), 'd ');
$revision = id(new DifferentialRevision())->load($id);

if (!$revision) {
  throw new Exception("No revision '{$id}' exists!");
}

$title = $revision->getTitle();
$ok = phutil_console_confirm("Really destroy 'D{$id}: {$title}' forever?");
if (!$ok) {
  throw new Exception("User aborted workflow.");
}

$revision->delete();
echo "OK, destroyed revision.\n";