Introduce default fallback jobs

When before lifeboat was expecting the user to populate the run, post,
and sync scripts, now it includes a sane default for each step of the
backup process, making deployments much more simple.

The post script was split up into retain and clean.

1 files changed, 45 insertions, 3 deletions

diff --git a/lifeboat b/lifeboat
index d4100d0..9d569f5 100755
--- a/lifeboat
+++ b/lifeboat
@@ -15,13 +15,55 @@ usage() {
 run_backup() {
 	(
 		cd "$rootdir/$repo"
-		./run
-		for i in post sync; do
-			test -x $i && ./$i
+
+		for i in run retain clean sync; do
+			if test -x $i; then
+				./$i
+			else
+				${i}_default;
+			fi
 		done
 	)
 }
 
+run_default() {
+	restic-priv backup --files-from config/include --exclude-file config/exclude --exclude-caches
+}
+
+retain_default() {
+	restic forget --keep-daily 7 --keep-weekly 5 --keep-monthly 12 --keep-yearly 2
+}
+
+clean_default() {
+	restic check
+	restic prune
+}
+
+sync_default() {
+	if ! test -r config/sync; then
+		return
+	fi
+
+	while read -r target_spec; do
+		target=$(echo "$target_spec" | cut -f1)
+		limit=$(echo "$target_spec" | cut -sf2)
+
+		if test -n "$limit"; then
+			if test "$(du -s "$RESTIC_REPOSITORY" | cut -f1)" -gt "$limit"; then
+				printf "Warning: size threshold exceeded, skipping sync to %s\n" "$target/$LIFEBOAT_REPO_NAME"
+			else
+				sync_single "$target"
+			fi
+		else
+			sync_single "$target"
+		fi
+	done < config/sync
+}
+
+sync_single() {
+	rclone sync --transfers 20 --fast-list "$RESTIC_REPOSITORY" "$1/$LIFEBOAT_REPO_NAME"
+}
+
 rootdir=${LIFEBOAT_ROOT:-"/srv/backup/lifeboat"}
 
 test $# -lt 2 && usage