From 91ff2e96bb038be3b0cbf31cab28fbbb1452187e Mon Sep 17 00:00:00 2001
From: Florian Pritz <bluewind@xinu.at>
Date: Thu, 14 Apr 2016 13:59:38 +0200
Subject: backup.sh: Misc changes; drop duplicity

Signed-off-by: Florian Pritz <bluewind@xinu.at>
---
 backup.sh | 65 +++++++++++++--------------------------------------------------
 1 file changed, 13 insertions(+), 52 deletions(-)

(limited to 'backup.sh')

diff --git a/backup.sh b/backup.sh
index e191f3a..951a4e9 100755
--- a/backup.sh
+++ b/backup.sh
@@ -1,14 +1,15 @@
 #!/bin/bash
 #
-# This is a simple backup script using duplicity. It's supposed to serve as a
+# This is a simple backup script using borg. It's supposed to serve as a
 # starting point and to be adjusted to your system.
 #
 # Important steps:
 #  - define a host "backup" in root's .ssh/config
 #  - read the script and adjust to your needs
-#  - export BORG_REPO in your environment or create a wrapper in $PATH that
-#    does it for calls to borg (my preference). For details on the variable
-#    see man borg
+#  - As root run `borg init -v --encryption=keyfile backup:borg-$HOSTNAME`
+#    (note that zsh uses $HOST instead of $HOSTNAME)
+#  - If you want, increase the max_segment_size in
+#    ssh://backup/borg-$HOSTNAME/config from the default 5MiB
 
 set -e
 
@@ -43,19 +44,8 @@ main() {
 	/mnt/data
 	)
 
-	# first line that matches wins
-	IFS='' read -r -d '' excludeList <<EOF || true
-+ /home/flo/.local/share/Steam/steamapps/common/Counter-Strike Global Offensive/csgo/cfg
-- /home/*/.local/share/Steam/steamapps/common/*/*
-- /home/*/.cache/*
-- /home/*/.claws-mail/imapcache
-- /root/.cache/*
-- /var/cache/pacman/pkg/*
-EOF
-
-	# same as above, but for borg backup. Note that borg uses a different
-	# syntax and does not support including lower level directories
-	# (TODO: verify this claim)
+	# list of patterns that should be excluded. This supports shell globbing as
+	# well as regex pattern. Refer to man borg for details.
 	IFS='' read -r -d '' excludeList_borg <<EOF || true
 sh:/home/flo/tmp/*
 sh:/home/*/.cache/*
@@ -64,7 +54,6 @@ sh:/var/cache/pacman/pkg/*
 EOF
 
 	exclude_mountpoints
-	echo "$excludeList" > "$TMPDIR/exclude-list"
 	echo "$excludeList_borg" > "$TMPDIR/exclude-list-borg"
 
 	# save some data that's useful for restores
@@ -78,43 +67,15 @@ EOF
 	df -a > "$backupDataDir/df"
 	findmnt -l > "$backupDataDir/findmnt"
 
-	backup_borg /
-
-	#local backupdir="$HOSTNAME-backup/full-backup"
-	#backup_duplicity / "sftp://backup/$backupdir/" --exclude-filelist "$TMPDIR/exclude-list"
-	#ssh backup "touch $backupdir/last-backup-timestamp"
-}
-
-backup_duplicity() {
-	local src=$1
-	local dest=$2
-	shift 2
-	local -a options=()
-
-	if [[ $(date +%d ) == '1' ]]; then
-		# try to only run full backups on day 1 each month
-		options+=(--full-if-older-than 2D)
-	else
-		# force a full backup once in a while
-		options+=(--full-if-older-than 30D)
-	fi
+	# TODO: create snapshots here if possible. Sadly that's really difficult so
+	# it will probably not be implemented
 
-	#export PASSPHRASE
-	HOME=/root duplicity \
-		-v5 \
-		--numeric-owner \
-		--volsize 250 \
-		--allow-source-mismatch \
-		--asynchronous-upload \
-		--no-encryption \
-		"${options[@]}" "$@" "$src" "$dest"
-
-	HOME=/root duplicity --force remove-older-than 120D "$dest"
-	#export PASSPHRASE=""
+	backup_borg / "backup:borg-$HOSTNAME"
 }
 
 backup_borg() {
 	local src=$1
+	local dst=$2
 
 	borg create \
 		-v \
@@ -123,9 +84,9 @@ backup_borg() {
 		--stats \
 		--progress \
 		--exclude-from "$TMPDIR/exclude-list-borg" \
-		"::backup-$(date "+%Y%m%d-%H%M%S")" "$src"
+		"$dst::backup-$(date "+%Y%m%d-%H%M%S")" "$src"
 
-	borg prune -v --keep-within 3m
+	borg prune -v --keep-within 6m "$dst"
 }
 
 ### support functions below ###
-- 
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