From add568a2424c5670f46c7b85c8bf34ee84a5841c Mon Sep 17 00:00:00 2001
From: Ruakij <ruakij@ruekov.eu>
Date: Sun, 1 Nov 2026 09:07:04 +0000
Subject: [PATCH] kopia_backup: render per-source retention overrides from
 kopia_backup.retention

---
 kopia_backup/templates/kopia-backup.j2 | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/kopia_backup/templates/kopia-backup.j2 b/kopia_backup/templates/kopia-backup.j2
index 90787aa..c71c73f 100644
--- a/kopia_backup/templates/kopia-backup.j2
+++ b/kopia_backup/templates/kopia-backup.j2
@@ -50,6 +50,24 @@ ignore() {
 ignore {{ i.key | quote }} {{ i.value | map('quote') | join(' ') }}
 {% endfor %}
 {% endif %}
+{% set retentions = kopia_backup.retention | default({}) | dict2items | rejectattr('value', 'none') | list %}
+{% if retentions %}
+
+# Per-source retention overrides, applied as a whole (--clear-retention runs after the keep flags within one call).
+retention() {
+  local path=$1; shift
+  kopia policy set "$path" --clear-retention >/dev/null 2>&1 &&
+    kopia policy set "$path" "$@" >/dev/null 2>&1 ||
+    { echo "setting the retention of $path failed" >&2; failed=1; }
+}
+{% for r in retentions %}
+retention {{ r.key | quote }} \
+  --keep-daily={{ r.value.keep_daily | default(0) }} \
+  --keep-weekly={{ r.value.keep_weekly | default(0) }} \
+  --keep-monthly={{ r.value.keep_monthly | default(0) }} \
+  --keep-annual={{ r.value.keep_annual | default(0) }}
+{% endfor %}
+{% endif %}
 
 for p in {{ kopia_backup.sources | map('quote') | join(' ') }}{{ ' "$etcd"' if kopia_backup.etcd_snapshot }}{{ ' "$dumps"' if kopia_backup.dumps }}; do
   [ -d "$p" ] && sources+=("$p")