From 27d127a861ae9707473b2eaf77bb39fe5350fd8e Mon Sep 17 00:00:00 2001
From: David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
Date: Wed, 29 Jul 2026 11:42:42 -0700
Subject: allow empty retain setting to keep all backups

---
 backomp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/backomp b/backomp
index c811a2a..f955916 100755
--- a/backomp
+++ b/backomp
@@ -42,11 +42,11 @@ BEGIN {
 	wshift = (11 - arr2[opt_week_start])*24*60*60
 }
 
-NR == 1 {
+!n_buckets || NR == 1 {
 	++keep[$0]
 }
 
-{
+n_buckets {
 	t = mktime(gensub(/(.*\/|^)(.+)-(..)-(..)-(..)(..)(..)$/,
 		"\\2 \\3 \\4 \\5 \\6 \\7", 1), 1)
 	if (t < 0) {
@@ -354,7 +354,7 @@ backup() {
 	dest_path="${dest_dir}/$(date -u '+%Y-%m-%d-%H%M%S')"
 	copy "${src_path}" "${dest_path}" "${snaps[0]}" || return 1
 
-	if [[ ! "${retain}" =~ ^( *([0-9]+|\*)\^?[hdwM] *)+$ ]]; then
+	if [[ ! "${retain}" =~ ^( *([0-9]+|\*)\^?[hdwM])*\ *$ ]]; then
 		err "invalid \$retain setting: ${retain}"
 		return 1
 	fi
@@ -369,13 +369,14 @@ backup() {
 }
 
 declare -A def_opts=(
-	['retain']='*h' # e.g. 24h7d4w12M or 24^h10d*M
+	['retain']= # e.g. *h or 24h7d4w12M or 24^h10d*M
 	['interval']='0'
 	['week_start']='mon'
 	['rsync_flags']='-a'
 	['rclone_flags']='--sftp-copy-is-hardlink'
 	['rclone_copy_command']='copy'
 	['rclone_use_copy_dest']=1
+	['pre_copy']=
 )
 declare -A opts tainted_opts
 reset_opts() {
-- 
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