upgrade repository delete function to full-blown workflow

Summary: fancy title. really just make the delete() method aware of related objects and build a quick workflow which calls delete(). also make commit delete savvy about audit requests.

Test Plan: deleted a repository per the instructions given to me in the web UI

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1416, T1958, T1372

Differential Revision: https://secure.phabricator.com/D3822

src/applications/repository/controller/PhabricatorRepositoryDeleteController.php

@@ -35,21 +35,27 @@ final class PhabricatorRepositoryDeleteController
     $request = $this->getRequest();
 
     if ($request->isDialogFormPost()) {
-      $repository->delete();
       return id(new AphrontRedirectResponse())->setURI('/repository/');
     }
 
     $dialog = new AphrontDialogView();
+    $text_1 = pht('If you really want to delete the repository, you must run:');
+    $command = 'bin/repository delete '.
+               phutil_escape_html($repository->getCallsign());
+    $text_2 = pht('Repositories touch many objects and as such deletes are '.
+                  'prohibitively expensive to run from the web UI.');
+    $body = phutil_render_tag(
+      'div',
+      array(
+        'class' => 'phabricator-remarkup',
+      ),
+      '<p>'.$text_1.'</p><p><tt>'.$command.'</tt></p><p>'.$text_2.'</p>');
     $dialog
       ->setUser($request->getUser())
-      ->setTitle('Really delete repository?')
-      ->appendChild(
-        '<p>Really delete the "'.phutil_escape_html($repository->getName()).
-        '" ('.phutil_escape_html($repository->getCallsign()).') repository? '.
-        'This operation can not be undone.</p>')
+      ->setTitle(pht('Really want to delete the repository?'))
+      ->appendChild($body)
       ->setSubmitURI('/repository/delete/'.$this->id.'/')
-      ->addSubmitButton('Delete Repository')
-      ->addCancelButton('/repository/');
+      ->addSubmitButton(pht('Okay'));
 
     return id(new AphrontDialogResponse())->setDialog($dialog);
   }