Make repository pull install hooks the first time

Summary:
Ref T4257. Currently, the pull logic looks like this:

  if (new) {
    create();
  } else {
    if (hosted) {
      install_hooks();
    } else {
      update();
    }
  }

This means that the first time you run `repository pull`, hooks aren't installed, which makes debugging trickier. Instead, reorganize the logic:

  if (new) {
    create();
  } else {
    if (!hosted) {
      update();
    }
  }

  if (hosted) {
    install_hooks();
  }

Test Plan: Ran `bin/repository pull` on a new `hg` repo and got hooks installed immediately.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T4257

Differential Revision: https://secure.phabricator.com/D7818

Author: epriestley

src/applications/repository/engine/PhabricatorRepositoryPullEngine.php

@@ -82,32 +82,29 @@ public function pullRepository() {
           $this->executeSubversionCreate();
         }
       } else {
-        if ($repository->isHosted()) {
-          if ($is_git) {
-            $this->installGitHook();
-          } else if ($is_svn) {
-            $this->installSubversionHook();
-          } else if ($is_hg) {
-            $this->installMercurialHook();
-          } else {
-            $this->logPull(
-              pht(
-                "Repository '%s' is hosted, so Phabricator does not pull ".
-                "updates for it.",
-                $callsign));
-          }
-        } else {
+        if (!$repository->isHosted()) {
           $this->logPull(
             pht(
               "Updating the working copy for repository '%s'.",
               $callsign));
           if ($is_git) {
             $this->executeGitUpdate();
-          } else {
+          } else if ($is_hg) {
             $this->executeMercurialUpdate();
           }
         }
       }
+
+      if ($repository->isHosted()) {
+        if ($is_git) {
+          $this->installGitHook();
+        } else if ($is_svn) {
+          $this->installSubversionHook();
+        } else if ($is_hg) {
+          $this->installMercurialHook();
+        }
+      }
+
     } catch (Exception $ex) {
       $this->abortPull(
         pht('Pull of "%s" failed: %s', $callsign, $ex->getMessage()),