Add utility to discover the blog backend given its name

r2db/tools/get-backend.php

+#!/opt/noblogs/cron/php-noblogs
+<?php
+
+if ($argv[1]) {
+  $blog_domain = $argv[1];
+  if (!preg_match('/\.noblogs\.org$/', $blog_domain)) {
+    $blog_domain = $blog_domain . '.noblogs.org';
+  }
+} else {
+  die("Usage: get-backend <blog_name>\n");
+}
+
+// Load wordpress api.
+define('WP_CACHE',false);
+/** Setup WordPress environment */
+require_once('wp-load.php');
+require_once('db-config.php');
+
+
+function new_hash($dbid, $reversemap) {
+  global $wpdb;
+  $lookup = $wpdb->hash_map->lookup($dbid);
+  $backend = $reversemap[$lookup];
+  $result = array();
+  if (preg_match('/^(.*):([0-9]*)$/', $backend['host'], $matches)) {
+    $result['host'] = $matches[1];
+    $result['port'] = $matches[2];
+  }
+  $result['user'] = $backend['user'];
+  $result['password'] = $backend['password'];
+  $result['db'] = $backend['name'];
+  return $result;
+}
+
+function get_blog($domain) 
+{
+  global $wpdb;
+
+//  $sql = "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE public = 1 AND deleted = 0 AND archived = '0' ORDER BY domain, path";
+  $sql = "SELECT blog_id, domain, path FROM $wpdb->blogs WHERE domain = '" . $domain . "'";
+  $result = $wpdb->get_results($sql);
+  return ($result[0]);
+}
+
+$hashmap = new Flexihash();
+$reverse_backend_map = noblogs_load_backends(NOBLOGS_BACKEND_CONFIG, $hashmap);
+
+$blog = get_blog($blog_domain);
+$backend = new_hash($blog->blog_id, $reverse_backend_map);
+
+echo "\n" . $blog_domain . " (id " . $blog->blog_id . ")\n\n";
+print_r($backend);
+