Thumbnail cleaning script, for missing files and File entries

Should be safe to run at any time, since thumbnails are regenerated on demand.

scripts/clean_thumbnails.php

@@ -0,0 +1,66 @@
+#!/usr/bin/env php
+<?php
+/*
+ * StatusNet - a distributed open-source microblogging tool
+ * Copyright (C) 2008, 2009, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
+
+$shortoptions = 'y';
+$longoptions = array('yes');
+
+$helptext = <<<END_OF_HELP
+clean_thumbnails.php [options]
+Deletes all local thumbnails so they can be regenerated. Also deletes
+if the original File object does not exist, even for remote entries.
+
+  -y --yes      do not wait for confirmation
+
+Will print '.' for deleted local files and 'x' where File entry was missing.
+If the script seems to stop, it is processing correct File_thumbnail entries.
+
+END_OF_HELP;
+
+require_once INSTALLDIR.'/scripts/commandline.inc';
+
+if (!have_option('y', 'yes')) {
+    print "About to delete locally generated thumbnails to allow regeneration. Are you sure? [y/N] ";
+    $response = fgets(STDIN);
+    if (strtolower(trim($response)) != 'y') {
+        print "Aborting.\n";
+        exit(0);
+    }
+}
+
+print "Deleting";
+$thumbs = new File_thumbnail();
+$thumbs->find();
+while ($thumbs->fetch()) {
+    try {
+        $file = $thumbs->getFile();
+        if ($file->isLocal()) {
+            // only delete properly linked thumbnails if they're local
+            $thumbs->delete();
+            print '.';
+        }
+    } catch (NoResultException $e) {
+        // No File object for thumbnail, let's delete the thumbnail entry
+        $thumbs->delete();
+        print 'x';
+    }
+}
+print "\nDONE.\n";