backup to backup folder

.gitignore

@@ -7,6 +7,8 @@ vendor/
 .sass-cache
 
 # Grav Specific
+backup/*
+!backup/.*
 cache/*
 !cache/.*
 assets/*

system/src/Grav/Common/Backup/ZipBackup.php

@@ -16,6 +16,7 @@ class ZipBackup
 
     protected static $ignore = [
         '.git',
+        'backup',
         'cache',
         'images',
         'logs'
@@ -24,8 +25,11 @@ class ZipBackup
     public static function backup($destination = null, callable $messager = null)
     {
         if (!$destination) {
-            $destination = self::getGrav()['locator']->findResource('cache://', true);
-            $destination = $destination . DS . 'tmp/Grav-' . uniqid();
+            $destination = self::getGrav()['locator']->findResource('backup://', true);
+
+            if (!$destination)
+                throw new \RuntimeException('The backup folder is missing.');
+
             Folder::mkdir($destination);
         }
 

system/src/Grav/Common/Config/Config.php

@@ -72,6 +72,12 @@ class Config extends Data
             'prefixes' => [
                 '' => ['logs']
             ]
+        ],
+        'backup' => [
+            'type' => 'Stream',
+            'prefixes' => [
+                '' => ['backup']
+            ]
         ]
     ];
 

system/src/Grav/Console/Cli/SandboxCommand.php

@@ -20,6 +20,7 @@ class SandboxCommand extends Command
      * @var array
      */
     protected $directories = array(
+        '/backup',
         '/cache',
         '/logs',
         '/images',