From 102de984798138f7cdd1dce10739774806d89695 Mon Sep 17 00:00:00 2001
From: Felix Stupp <felix.stupp@outlook.com>
Date: Sun, 1 Dec 2019 18:38:24 +0100
Subject: [PATCH] common: Configured auto remove of backups

---
 group_vars/all/vars.yml                     |  1 +
 roles/common/tasks/helpers.yml              |  9 +++++++++
 roles/common/templates/backup_autoremove.sh | 21 +++++++++++++++++++++
 3 files changed, 31 insertions(+)
 create mode 100644 roles/common/templates/backup_autoremove.sh

diff --git a/group_vars/all/vars.yml b/group_vars/all/vars.yml
index a0cd337..de58ce3 100644
--- a/group_vars/all/vars.yml
+++ b/group_vars/all/vars.yml
@@ -12,6 +12,7 @@ zocker_authorized_keys_url: "https://git.banananet.work/zocker.keys"
 update_scripts_directory: "/root/update"
 
 backup_gpg_fingerprint: "73D09948B2392D688A45DC8393E1BD26F6B02FB7"
+backups_to_keep: 1
 backups_directory: "/backups"
 backups_files_directory: "{{ backups_directory }}/files"
 backups_mysql_database_directory: "{{ backups_directory }}/mysql_databases"
diff --git a/roles/common/tasks/helpers.yml b/roles/common/tasks/helpers.yml
index 64b102f..b0c4425 100644
--- a/roles/common/tasks/helpers.yml
+++ b/roles/common/tasks/helpers.yml
@@ -27,5 +27,14 @@
     group: root
     mode: "u=rwx,g=rx,o=rx"
   loop:
+    - backup_autoremove.sh
     - backup_files.sh
     - backup_mysql_database.sh
+
+- name: Configure auto remove older backups
+  cron:
+    hour: 1
+    minute: 55
+    job: "{{ global_helper_directory }}/backup_autoremove.sh"
+    name: "Auto remove older backups"
+    state: present
diff --git a/roles/common/templates/backup_autoremove.sh b/roles/common/templates/backup_autoremove.sh
new file mode 100644
index 0000000..a84742d
--- /dev/null
+++ b/roles/common/templates/backup_autoremove.sh
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -euxo pipefail;
+
+backupsToKeep={{ backups_to_keep }};
+
+function onlyDatedFiles() {
+  grep --perl-regexp '/\d+(-\d+)*(\.[^/]+)*$';
+}
+
+function getDirName() {
+  grep --only-matching --perl-regexp '^.+(?=/[^/]+)';
+}
+
+find {{ backups_directory | quote }} -type f |
+  onlyDatedFiles |
+  getDirName |
+  sort --unique |
+  while read dir; do
+  find "$dir" --type f | onlyDatedFiles | sort --reverse | tail --lines=+$((backupsToKeep + 1)) | xargs rm;
+done