backup.sh: Support partial backups

Signed-off-by: Florian Pritz <bluewind@xinu.at>

1 files changed, 19 insertions, 6 deletions

diff --git a/backup.sh b/backup.sh
index cbaaf29..dd30db3 100755
--- a/backup.sh
+++ b/backup.sh
@@ -11,7 +11,7 @@
 #  - If you want, increase the max_segment_size in
 #    ssh://backup/borg-$HOSTNAME/config from the default 5MiB
 #
-# Copyright ©2014-2017 Florian Pritz <bluewind@xinu.at>
+# Copyright ©2014-2019 Florian Pritz <bluewind@xinu.at>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -77,8 +77,19 @@ main() {
 	exclude_mountpoints
 	echo "$excludeList" > "$TMPDIR/exclude-list-borg"
 
+	source_paths=(/)
+	backup_prefix="backup"
+
+	if [[ $# -gt 0 ]]; then
+		source_paths=()
+		backup_prefix="partial"
+		for path in "$@"; do
+			source_paths+=("$(realpath "$path")")
+		done
+	fi
+
 	run_if_exists pre_backup
-	backup_borg / "$borg_repo"
+	backup_borg "$backup_prefix" "$borg_repo" "${source_paths[@]}"
 	run_if_exists post_backup
 }
 
@@ -107,8 +118,9 @@ post_backup() {
 }
 
 backup_borg() {
-	local src=$1
-	local dst=$2
+	local backup_prefix=$1; shift
+	local dst=$1; shift
+	local src=("$@")
 	local -a options=(
 		--verbose
 		--numeric-owner
@@ -120,8 +132,9 @@ backup_borg() {
 		options+=(--progress --stats)
 	fi
 
-	borg create "${options[@]}" "$dst::backup-$(date "+%Y%m%d-%H%M%S")" "$src"
-	borg prune --keep-within 7d --keep-daily 7 --keep-weekly 12 --keep-monthly 6 --keep-yearly 0 -v "$dst"
+	borg create "${options[@]}" "$dst::$backup_prefix-$(date "+%Y%m%d-%H%M%S")" "${src[@]}"
+	borg prune --prefix "backup-" --keep-within 7d --keep-daily 7 --keep-weekly 12 --keep-monthly 6 --keep-yearly 0 -v "$dst"
+	borg prune --prefix "partial-" --keep-within 7d --keep-daily 7 --keep-weekly 12 --keep-monthly 6 --keep-yearly 0 -v "$dst"
 }
 
 ### support functions below ###