Allow Herald rules to check for revisions with no reviewers

Summary: Fixes T4225. Adds the NON_EXISTS condition to Herald for "Reviewers", and adds a few more conditions which have reasonable meanings.

Test Plan: Used test console to check a revision with reviewers, and another without reviewers. Both produced the expected results.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T4225

Differential Revision: https://secure.phabricator.com/D7757

src/applications/herald/adapter/HeraldAdapter.php

@@ -199,21 +199,31 @@ abstract class HeraldAdapter {
         );
       case self::FIELD_AUTHOR:
       case self::FIELD_COMMITTER:
-      case self::FIELD_REPOSITORY:
       case self::FIELD_REVIEWER:
         return array(
           self::CONDITION_IS_ANY,
           self::CONDITION_IS_NOT_ANY,
         );
+      case self::FIELD_REPOSITORY:
+        return array(
+          self::CONDITION_IS_ANY,
+          self::CONDITION_IS_NOT_ANY,
+          self::CONDITION_EXISTS,
+          self::CONDITION_NOT_EXISTS,
+        );
       case self::FIELD_TAGS:
       case self::FIELD_REVIEWERS:
       case self::FIELD_CC:
       case self::FIELD_AUTHOR_PROJECTS:
       case self::FIELD_PROJECTS:
+      case self::FIELD_AFFECTED_PACKAGE:
+      case self::FIELD_AFFECTED_PACKAGE_OWNER:
         return array(
           self::CONDITION_INCLUDE_ALL,
           self::CONDITION_INCLUDE_ANY,
           self::CONDITION_INCLUDE_NONE,
+          self::CONDITION_EXISTS,
+          self::CONDITION_NOT_EXISTS,
         );
       case self::FIELD_DIFF_FILE:
         return array(
@@ -233,12 +243,6 @@ abstract class HeraldAdapter {
           self::CONDITION_RULE,
           self::CONDITION_NOT_RULE,
         );
-      case self::FIELD_AFFECTED_PACKAGE:
-      case self::FIELD_AFFECTED_PACKAGE_OWNER:
-        return array(
-          self::CONDITION_INCLUDE_ANY,
-          self::CONDITION_INCLUDE_NONE,
-        );
       case self::FIELD_CONTENT_SOURCE:
         return array(
           self::CONDITION_IS,

src/applications/herald/storage/HeraldRule.php

@@ -16,7 +16,7 @@ final class HeraldRule extends HeraldDAO
   protected $ruleType;
   protected $isDisabled = 0;
 
-  protected $configVersion = 14;
+  protected $configVersion = 15;
 
   private $ruleApplied = self::ATTACHABLE; // phids for which this rule has been applied
   private $validAuthor = self::ATTACHABLE;