Add backups for dokuwiki

roles/dokuwiki/tasks/main.yml

@@ -56,4 +56,9 @@
     vars:
       website_url: "{{ dokuwiki_url }}"
       website_webroot: "{{ dokuwiki_webroot }}"
+  - name: Template out backup module:
+    template:
+      src: "backup.sh"
+      dest: "/opt/backups/modules"
+      mode: "0600"
   become: yes

roles/dokuwiki/templates/backup.sh

@@ -0,0 +1,38 @@
+#! /bin/bash
+#
+# gitea.sh
+# Backup script for Gitea. Meant to be sourced by our main backup script
+# Copyright (C) 2020 Vintage Salt <rehashedsalt@cock.li>
+#
+# Distributed under terms of the MIT license.
+#
+
+set -e
+
+export OUTDIR="$BACKUPSDIR/{{ dokuwiki_url }}"
+retention=7 # 7-day retention period
+
+# Sanity checks
+if [ -z "$BACKUPSDIR" ]; then
+	log "BACKUPSDIR was undefined. Run the main backup script instead of this one."
+	return 1
+fi
+if ! [ -d "$OUTDIR" ]; then
+	if ! mkdir "$OUTDIR"; then
+		log "Unable to find or create output directory: $OUTDIR"
+		return 2
+	fi
+fi
+
+# Purge oldest backup if we need to
+currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
+if (( currentbackupcount >= retention )); then
+	lastbackup="$(find "$OUTDIR" -name \*.zip 2>/dev/null | sort | head -n 1)"
+	if [ -f "$lastbackup" ]; then
+		log "Removing old backup: $lastbackup"
+		rm "$lastbackup"
+	fi
+fi
+# WE MAKE BACKUP NOW SERGEI
+tar czf "$OUTDIR/$(date -Iseconds).tar.gz" "{{ dokuwiki_webroot }}"
+