Allow overriding translations without creating PhabricatorTranslation

Test Plan: Overridden '%d Detail(s)', verified that it was used.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1139

Differential Revision: https://secure.phabricator.com/D2815

conf/default.conf.php

@@ -71,6 +71,11 @@ return array(
   // PhabricatorTranslation.
   'translation.provider' => 'PhabricatorEnglishTranslation',
 
+  // You can use 'translation.override' if you don't want to create a full
+  // translation to give users an option for switching to it and you just want
+  // to override some strings in the default translation.
+  'translation.override' => array(),
+
 
 // -- Access Policies ------------------------------------------------------- //
 

src/infrastructure/internationalization/PhabricatorEnglishTranslation.php

@@ -23,4 +23,10 @@ final class PhabricatorEnglishTranslation
     return 'English';
   }
 
+  public function getTranslations() {
+    return
+      PhabricatorEnv::getEnvConfig('translation.override') +
+      parent::getTranslations();
+  }
+
 }