From 7383c50134c44cea13ef0c96ea8935dd8cf47c30 Mon Sep 17 00:00:00 2001
From: Laurent Cozic <laurent@cozic.net>
Date: Fri, 23 Feb 2018 18:16:37 +0000
Subject: Documented backup expiration strategy and added test file

---
 tests/populate_dest.php | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 tests/populate_dest.php

(limited to 'tests/populate_dest.php')

diff --git a/tests/populate_dest.php b/tests/populate_dest.php
new file mode 100644
index 0000000..0603c27
--- /dev/null
+++ b/tests/populate_dest.php
@@ -0,0 +1,30 @@
+<?php
+
+// This PHP script can be used to test the expiration strategy.
+// It is going to populate a directory with fake backup sets (directories named Y-m-d-His) over several months.
+// Then the backup script can be run on it to check what directories are going to be deleted.
+
+// rm -rf ./tests/TestDest/201* && php ./tests/populate_dest.php && ./rsync_tmbackup.sh ./tests/TestSource/ ./tests/TestDest/
+
+$baseDir = dirname(__FILE__);
+$destDir = $baseDir . '/TestDest';
+
+$backupsPerDay = 2;
+$totalDays = 500;
+
+$intervalBetweenBackups = null;
+if ($backupsPerDay === 1) {
+	$intervalBetweenBackups = 'PT1D';
+} else if ($backupsPerDay === 2) {
+	$intervalBetweenBackups = 'PT12H';
+} else {
+	throw new Exception('Not implemented');
+}
+
+$d = new DateTime();
+$d->sub(new DateInterval('P' . $totalDays . 'D'));
+
+for ($i = 0; $i < $backupsPerDay * $totalDays; $i++) {
+	$d->add(new DateInterval($intervalBetweenBackups));
+	mkdir($destDir . '/' . $d->format('Y-m-d-His'), 0777, true);
+}
\ No newline at end of file
-- 
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