Convert a docker image to WSL script

docker_to_wsl.bsh

#!/usr/bin/env bash

set -eu

# Should be run in MinGW

if [ "$#" -lt "2" ]; then
  echo "Usage: $0 {docker_image_name} {WSL name}" >&2
  exit 1
fi

: ${USERNAME=$(id -un)}

docker_image="${1}"
wsl_name="${2}"

wsl_dir=~/AppData/Local/WSLs/"${wsl_name}"
temp_tar_file=~/AppData/Local/WSLs/"${wsl_name}.tar"
mkdir -p "${wsl_dir}"

# Convert image -> container -> tar
docker_container="$(docker create ${docker_image})"
docker export "${docker_container}" -o "${temp_tar_file}"
docker container rm "${docker_container}"

# import tar
wsl --import "${wsl_name}" "${wsl_dir}" "${temp_tar_file}"
rm "${temp_tar_file}"

function run_wsl()
{ # PATH (and other things) from MinGW will interfere with WSL, bad combo
  local wsl_bin="$(command -v wsl)"
  /usr/bin/env -i "${wsl_bin}" -d "${wsl_name}" "${@}"
}

function install_dep()
{
  # run_wsl bash -xvc '
  #   while ! command -v '"${1}"' &> /dev/null; do
  #     echo "Cannot find \"'"${1}"'\", please enter command to install it, or blank to skip"
  #     read -rp "Command to install '"${1}"': " cmd
  #     if [ -z "${cmd}" ]; then
  #       declare -p cmd
  #       break
  #     fi
  #     eval "${cmd}"
  #   done'
  # I could get the above to work, but it's so hacky and inconsistent with how
  # quotes really work, I'd rather do without
  # No work: wsl -d Fedora -- bash -xvc "cmd=foo; echo \"\${cmd}\""
  # Works: wsl -d Fedora -- bash -xvc "cmd=foo; echo \"\\\${cmd}\""

  while ! run_wsl bash -c "command -v \"${1}\"" &> /dev/null; do
    echo "Cannot find '${1}', please enter command to install it, or blank to skip"
    read -rp "Command to install '${1}' (sh to interact): " cmd
    if [ -z "${cmd}" ]; then
        break
    fi
    run_wsl ${cmd}
  done
}

# Setup initial user
# install_dep useradd
# install_dep passwd
install_dep sudo

run_wsl useradd -G wheel "${USERNAME}"
run_wsl passwd "${USERNAME}"

run_wsl bash -c "printf '[user]\ndefault=${USERNAME}' > /etc/wsl.conf;
                 rm /.dockerenv"

wsl -t "${wsl_name}"

echo
echo "Get started run: wsl -d ${wsl_name}"
echo "To use in Windows Terminal add:"
echo
# quick and dirty fake uuid
uuid="$(cat /dev/urandom | LC_ALL=iso-8859-1 tr -dc 'a-f0-9' | head -c 32)"
uuid="${uuid:0:8}-${uuid:8:4}-${uuid:12:4}-${uuid:16:4}-${uuid:20:12}"
echo '            {
                "guid": "{'"${uuid}"'}",
                "hidden": false,
                "name": "'"${wsl_name}"'",
                "source": "Windows.Terminal.Wsl"
            }
'

echo
echo "To remove:"
echo "wsl --unregister ${wsl_name}"