script to convert rdiff-backup to duplicity

rdiff_backup_to_duplicity.sh

#!/bin/bash

set -ueo pipefail

TMPROOT=$(mktemp -d .rdiff_backup_to_duplicity_XXXXXX)

cleanup() {
    rm -rf "$TMPROOT";
}
trap cleanup EXIT

RDIFF_BACKUP_REMOTE=$1
DUPLICITY_REMOTE=$2

DUPLICITY_ARGS="--no-encryption"
if [ ! -z "${GPG_KEY:-}" ]; then
    DUPLICITY_ARGS="--encrypt-key $GPG_KEY"
fi
RDIFF_ARGS=
if [ ! -z "${REMOTE_TEMPDIR:-}" ]; then
    RDIFF_ARGS="--remote-tempdir $REMOTE_TEMPDIR"
fi

backups=$(rdiff-backup --list-increments --parsable-output "$RDIFF_BACKUP_REMOTE" | cut -f1 -d' ')
for ts in $backups; do
    rdiff-backup --restore-as-of $ts $RDIFF_ARGS "$RDIFF_BACKUP_REMOTE" "$TMPROOT/rdiff_restored"
    duplicity --current-time $ts $DUPLICITY_ARGS "$TMPROOT/rdiff_restored" "$DUPLICITY_REMOTE"
    rm -rf "$TMPROOT/rdiff_restored"
done