#!/bin/sh

set -e

if [ ! -d /mnt/data/docker ] || [ -z "$(ls -A /mnt/data/docker)" ]; then
    echo "[INFO] Docker data is wiped, creating containerd snapshotter flag"
    touch /mnt/data/.docker-use-containerd-snapshotter
fi

DOCKERD_FLAGS=""

if [ -f /mnt/data/.docker-use-containerd-snapshotter ]; then
    echo "[INFO] Using Docker containerd snapshotter"
    DOCKERD_FLAGS="${DOCKERD_FLAGS} --feature containerd-snapshotter"

    if [ -d /mnt/data/docker/overlay2 ]; then
        echo "[INFO] Removing no longer used overlay2 directory"
        # Allow the removal to fail without failing the service
        rm -rf /mnt/data/docker/overlay2 || true
    fi
fi

echo "DOCKERD_FLAGS=\"${DOCKERD_FLAGS}\"" > /run/dockerd.env