Support for separate retention settings for external backups (to other partition/disk)

Author: nazar-pc

changelog.md

@@ -1,5 +1,6 @@
-# 0.x (Unreleased yet)
+# 0.6 (08 June, 2015)
 * Radically improve speed of incremental backups (check recent snapshots first)
+* Support for separate retention settings for external backups (to other partition/disk)
 
 # 0.5 (17 May, 2015)
 * Code moved into class

just-backup-btrfs.php

@@ -8,7 +8,7 @@
  * @author    Nazar Mokrynskyi <[email protected]>
  * @copyright Copyright (c) 2014-2015, Nazar Mokrynskyi
  * @license   http://opensource.org/licenses/MIT
- * @version   0.5
+ * @version   0.6
  */
 class Just_backup_btrfs {
 	/**
@@ -140,7 +140,7 @@ protected function do_backup_external ($config, $history_db, $snapshot, $comment
 		if (!$history_db_external) {
 			return;
 		}
-		list($keep_year, $keep_month, $keep_day, $keep_hour) = $this->how_long_to_keep($history_db_external, $config['keep_snapshots']);
+		list($keep_year, $keep_month, $keep_day, $keep_hour) = $this->how_long_to_keep($history_db_external, isset($config['keep_other_snapshots']) ? $config['keep_other_snapshots'] : $config['keep_snapshots']);
 		if (!$keep_hour) {
 			return;
 		}

readme.md

@@ -94,12 +94,19 @@ Configuration options are especially made self-explanatory:
 			"day"	: 48,
 			"month"	: 60,
 			"year"	: 96
+		},
+		"keep_other_snapshots"			: {
+			"hour"	: -1,
+			"day"	: 96,
+			"month"	: 120,
+			"year"	: 192
 		}
 	}
 ]
 ```
 Here you can use `-1` as value for `keep_snapshots` elements to allow storing of all created snapshots.
 Also `destination_other_partition` might be `false` or path on some other BTRFS partition (even on other drive) to create backups, not just snapshots.
+If `keep_other_snapshots` option is present - it will be used for `destination_other_partition` instead of `keep_snapshots`. 
 Most options should be obvious
 
 Save this config as `/etc/just-backup-btrfs.json` and customize as you like.