docker copy

docker-copy.sh

#!/bin/sh

set -o errexit
set -o nounset
set -o xtrace

CONTAINER_ID_FILE=$(mktemp -u)

cleanup() {
    currentExitCode=$?
    rm -f "${CONTAINER_ID_FILE}"
    docker rm "${CONTAINER_ID}" || true
    exit ${currentExitCode}
}

trap cleanup INT TERM EXIT

IMAGE_ID=$(cat "${1}")

docker create \
    --cidfile "${CONTAINER_ID_FILE}" \
    "${IMAGE_ID}"

CONTAINER_ID=$(cat "${CONTAINER_ID_FILE}")

docker cp "${CONTAINER_ID}:${2}" "${3}"