docker-duplicity-cron/restore.sh

#! /bin/bash
set -euf

(
    if ! flock -x -w "$FLOCK_WAIT" 200 ; then
        echo 'ERROR: Could not obtain lock. Exiting.'
        exit 1
    fi

    # Run pre-restore scripts
    for f in /scripts/restore/before/*; do
        if [ -f "$f" ] && [ -x "$f" ]; then
            bash "$f"
        fi
    done

    # Intentionally not wrapping OPT_ARGUMENTS
    # shellcheck disable=SC2086
    duplicity restore \
        --force \
        --log-file /root/duplicity.log \
        --name "$BACKUP_NAME" \
        $OPT_ARGUMENTS \
        "$@" \
        "$BACKUP_DEST" \
        "$PATH_TO_BACKUP"

    # Run post-restore scripts
    for f in /scripts/restore/after/*; do
        if [ -f "$f" ] && [ -x "$f" ]; then
            bash "$f"
        fi
    done

) 200>/var/lock/duplicity/.duplicity.lock