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Add --modified-within flag to limit files by last modified date in backups #4

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Add --modified-within flag to limit files by last modified date in backups #4

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Copilot Sep 10, 2025
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Add --modified-within flag to limit files by last modified date in ba…
Copilot Sep 10, 2025
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19 changes: 16 additions & 3 deletions immutable-backups.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ function showHelpCommands {

function showHelpBackup {
echo ""
echo "Usage: $(basename $0) backup --local=[local] --remote=[remote] (--incremental) (--dry-run)"
echo "Usage: $(basename $0) backup --local=[local] --remote=[remote] (--incremental) (--modified-within=[age]) (--dry-run)"
echo ""
echo " where:"
echo ""
Expand All @@ -33,6 +33,7 @@ function showHelpBackup {
echo " optional:"
echo ""
echo " --incremental If specified, the backup is incremental instead of full"
echo " --modified-within=[age] If specified, only consider files modified within [age] (e.g. 30d, 72h, 12w)"
echo " --dry-run If specified, dont copy anything, just test"
echo " --verbose If specified, output is more verbose"
echo ""
Expand All @@ -43,6 +44,9 @@ function showHelpBackup {
echo " # Take an full backup of a local directory to offsite"
echo " $(basename $0) backup --local=/path/to/files --remote=your-remote: --dry-run"
echo ""
echo " # Take an incremental backup considering only files modified in the last 30 days"
echo " $(basename $0) backup --local=/path/to/files --remote=your-remote: --incremental --modified-within=30d --dry-run"
echo ""
echo "Notes:"
echo " * This requires rclone to be installed and the remotes to be configured on this system. See the rclone"
echo " docs for more info: https://rclone.org/"
Expand Down Expand Up @@ -100,6 +104,8 @@ date=""
incrementalDateStart=""
dry_run_flag=""
verbose_flag=""
modified_within=""
max_age_flag=""
RCLONE_BIN=${RCLONE_BIN:-/usr/bin/rclone}

if [ "$1" == "backup" ]; then
Expand Down Expand Up @@ -142,6 +148,13 @@ if [ "$operation" == "backup" ]; then
export verbose_flag
shift
;;
--modified-within*)
modified_within=$(echo $1 | sed -e 's/^[^=]*=//g')
max_age_flag="--max-age=${modified_within}"
export modified_within
export max_age_flag
shift
;;
*)
shift
continue
Expand Down Expand Up @@ -174,12 +187,12 @@ if [ "$operation" == "backup" ]; then
compareDestFlags[i]=" --compare-dest=${remote}/incremental/${path}"
done

$RCLONE_BIN copy --no-traverse --immutable --copy-links ${local} ${remote}/incremental/$(date +"%Y-%m-%d-%H%M%S") ${dry_run_flag} ${compareDestFlags[*]} ${verbose_flag}
$RCLONE_BIN copy --no-traverse --immutable --copy-links ${local} ${remote}/incremental/$(date +"%Y-%m-%d-%H%M%S") ${dry_run_flag} ${compareDestFlags[*]} ${max_age_flag} ${verbose_flag}

else
echo "$(date) Starting full backup"

$RCLONE_BIN copy --no-traverse --immutable --copy-links ${local} ${remote}/full/$(date +"%Y-%m-%d-%H%M%S") ${dry_run_flag} ${verbose_flag}
$RCLONE_BIN copy --no-traverse --immutable --copy-links ${local} ${remote}/full/$(date +"%Y-%m-%d-%H%M%S") ${dry_run_flag} ${max_age_flag} ${verbose_flag}
fi
elif [ "$operation" == "restore" ]; then

Expand Down