#!/bin/bash

set -x

set -eo pipefail

SRC=$1
DEST=$2

if [ -f $DEST/.delete-volume ]; then
    rm -rf $DEST
fi

if [ -d $DEST ]; then
    if [ -f $DEST/.sync-volume ]; then
        if ! [[ "$JUPYTER_SYNC_VOLUME" =~ ^(false|no|n|0)$ ]]; then
            JUPYTER_SYNC_VOLUME=yes
        fi
    fi

    if [[ "$JUPYTER_SYNC_VOLUME" =~ ^(true|yes|y|1)$ ]]; then
        rsync -ar --ignore-existing $SRC/. $DEST
    fi

    exit
fi

if [ -d $DEST.setup-volume ]; then
    rm -rf $DEST.setup-volume
fi

mkdir -p $DEST.setup-volume

tar -C $SRC -cf - . | tar -C $DEST.setup-volume -xvf -

mv $DEST.setup-volume $DEST