From 8cc418411bcc426ed5e8c6b8b557e6885e1aa36b Mon Sep 17 00:00:00 2001
From: Salt <rehashedsalt@cock.li>
Date: Tue, 29 Sep 2020 05:38:39 -0500
Subject: [PATCH] Add nightly full backups to tmodloader

---
 roles/tmodloader/tasks/main.yml              |  5 ++
 roles/tmodloader/templates/backup-nightly.sh | 49 ++++++++++++++++++++
 roles/tmodloader/templates/backup.sh         |  9 ++--
 3 files changed, 57 insertions(+), 6 deletions(-)
 create mode 100644 roles/tmodloader/templates/backup-nightly.sh

diff --git a/roles/tmodloader/tasks/main.yml b/roles/tmodloader/tasks/main.yml
index 5d4cac0..f2de43c 100644
--- a/roles/tmodloader/tasks/main.yml
+++ b/roles/tmodloader/tasks/main.yml
@@ -108,6 +108,11 @@
         owner: terraria
         group: ter-admin
         mode: "0700"
+    - name: Template out nightly backup script
+      template:
+        src: "backup-nightly.sh"
+        dest: "/opt/backups/modules/tmodloader-{{ terraria_name }}.sh"
+        mode: "0600"
     - name: Set up backup cronjob
       cron:
         minute: "*/30"
diff --git a/roles/tmodloader/templates/backup-nightly.sh b/roles/tmodloader/templates/backup-nightly.sh
new file mode 100644
index 0000000..a474a86
--- /dev/null
+++ b/roles/tmodloader/templates/backup-nightly.sh
@@ -0,0 +1,49 @@
+#! /bin/bash
+#
+# tmodloader-nightly.sh
+# Backup script for tModLoader. 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 TERRARIADIR="{{ terraria_root }}/{{ terraria_name }}"
+export OUTDIR="$BACKUPSDIR/tmodloader/{{ terraria_name }}"
+retention=5 # 5-day retention period
+
+# Sanity checks
+if [ -z "$BACKUPSDIR" ]; then
+	log "BACKUPSDIR was undefined. Run the main backup script instead of this one."
+	return 1
+fi
+if ! [ -d "$OUTDIR" ]; then
+	if ! mkdir -p "$OUTDIR"; then
+		log "Unable to find or create output directory: $OUTDIR"
+		return 2
+	fi
+fi
+# Enforce permissions on our output directory
+chown terraria.ter-admin "$OUTDIR"
+chmod 770 "$OUTDIR"
+
+# Purge oldest backup if we need to
+currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
+# Multiplying by three here because our backups are three-parters
+if (( currentbackupcount >= retention * 3 )); then
+	find "$OUTDIR"/ -iname "*.tar.gz" -mtime +30 -delete
+fi
+# WE MAKE BACKUP NOW SERGEI
+if cd "$TERRARIADIR"; then
+{% if aws.backup_bucket is defined %}
+	log "Initiating full tmodloader backup"
+	tar czh --exclude="$TERRARIADIR/backups" "$TERRARIADIR" | aws s3 cp - "s3://{{ aws.backup_bucket }}/tmodloader/{{ terraria_name }}/full-$date-server.tar.gz" --storage-class STANDARD
+	log "Backing up mod configuration"
+	tar czh "{{ terraria_root }}/.local/share/Terraria/ModLoader" | aws s3 cp - "s3://{{ aws.backup_bucket }}/tmodloader/{{ terraria_name }}/full-$date-mods.tar.gz" --storage-class STANDARD
+{% endif %}
+else
+	log "Could not change directory: $TERRARIADIR"
+	return 3
+fi
+
diff --git a/roles/tmodloader/templates/backup.sh b/roles/tmodloader/templates/backup.sh
index 6608b7f..ee905df 100644
--- a/roles/tmodloader/templates/backup.sh
+++ b/roles/tmodloader/templates/backup.sh
@@ -32,12 +32,9 @@ chmod 770 "$OUTDIR"
 
 # Purge oldest backup if we need to
 currentbackupcount="$(ls -1 "$OUTDIR" | wc -l)"
-if (( currentbackupcount >= retention )); then
-	lastbackup="$(find "$OUTDIR" -name \*.wld 2>/dev/null | sort | head -n 1)"
-	if [ -f "$lastbackup" ]; then
-		log "Removing old backup: $lastbackup"
-		rm "$lastbackup"
-	fi
+# Two-part backups get two-part removal
+if (( currentbackupcount >= retention * 2 )); then
+	find "$OUTDIR/" -iname "\*wld" -mtime +30 -delete
 fi
 # WE MAKE BACKUP NOW SERGEI
 if cd "$OUTDIR"; then