Cut mirroring over to new URIs

Summary:
Ref T10748. This migrates and swaps mirroring to `PhabricatorRepositoryURI`, obsoleting `PhabricatorRepositoryMirror`.

This prevents you from editing, adding or disabling mirrors unless you know a secret URI (until the UI cuts over fully), but existing mirroring is not affected.

Test Plan:
  - Added a mirroring URI to an old repository.
  - Verified it worked with `bin/repository mirror`.
  - Migrated forward.
  - Verified it still worked with `bin/repository mirror`.
  - Wow, mirroring: https://github.com/epriestley/locktopia-mirror

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10748

Differential Revision: https://secure.phabricator.com/D15841

resources/sql/autopatches/20160503.repo.04.mirrormigrate.php

@@ -0,0 +1,38 @@
+<?php
+
+$table = new PhabricatorRepository();
+$conn_w = $table->establishConnection('w');
+
+$mirrors = queryfx_all(
+  $conn_w,
+  'SELECT * FROM %T',
+  'repository_mirror');
+
+foreach ($mirrors as $mirror) {
+  $repository_phid = $mirror['repositoryPHID'];
+  $uri = $mirror['remoteURI'];
+
+  $already_exists = id(new PhabricatorRepositoryURI())->loadOneWhere(
+    'repositoryPHID = %s AND uri = %s',
+    $repository_phid,
+    $uri);
+  if ($already_exists) {
+    // Decline to migrate stuff that looks like it was already migrated.
+    continue;
+  }
+
+  $new_uri = PhabricatorRepositoryURI::initializeNewURI()
+    ->setIOType(PhabricatorRepositoryURI::IO_MIRROR)
+    ->setRepositoryPHID($repository_phid)
+    ->setURI($uri)
+    ->setCredentialPHID($mirror['credentialPHID'])
+    ->setDateCreated($mirror['dateCreated'])
+    ->setDateModified($mirror['dateModified'])
+    ->save();
+
+  echo tsprintf(
+    "%s\n",
+    pht(
+      'Migrated mirror "%s".',
+      $uri));
+}