fix mail backup expiration

[distro-setup] / mail-backup-clean

diff --git a/mail-backup-clean b/mail-backup-clean
index 993839f78180df5c1ea2421fcf64faaf1654f5a7..7692145f9ab8891f1e38d9bf132397cf9540ccdc 100755 (executable)
--- a/mail-backup-clean
+++ b/mail-backup-clean
@@ -18,9 +18,16 @@ shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
 
-cd /mnt/o/btrbk
-tmp=(o*)
-last_snap_date=${tmp[-1]#o.}
-time=$(( $(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<$last_snap_date) +%s) -1 ))
-# 1 second granularity, so we could have a duplicate file, oh well, not worrying about that.
-find /bu/md -type f \! -newermt @$time -delete
+## This would delete backups that we already have in snapshots,
+## 1 second granularity, so we could have some duplicates. However,
+## this doesn't account for files received then accidentally deleted,
+## all in between two snapshots, so they aren't in any snapshot.
+## So, instead, just keep a bunch of backups based on time.
+
+# cd /mnt/o/btrbk
+# tmp=(o*)
+# last_snap_date=${tmp[-1]#o.}
+# time=$(( $(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<$last_snap_date) +%s) -1 ))
+# find /bu/md -type f \! -newermt @$time -delete
+
+find /bu/md -type f -mtime +100 -delete