#!/usr/bin/env bash
# Put the project on a USB flash drive for deploy/update.sh: the host part of the
# last commit as an archive (no venv, build, data or local configs) and the update
# script, both in <drive>/radar_update/.
#
#     deploy/pack-usb.sh [DRIVE]
#
# DRIVE defaults to the only mounted removable drive.
set -euo pipefail

PROJECT_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
# What runs on the Pi or Jetson; device_firmware/ and docs/ stay on this machine.
HOST_PATHS=(data_acq_and_processing deploy python_app run_config_examples Makefile
            requirements.txt run_config.json start.sh locator_test_client.py)

drive="${1:-}"
if [[ -z "${drive}" ]]; then
    mapfile -t drives < <(lsblk -nlo HOTPLUG,MOUNTPOINT | sed -n 's|^ *1 \+\(/.*\)$|\1|p')
    if (( ${#drives[@]} != 1 )); then
        echo "Found ${#drives[@]} mounted removable drives; name one: $0 /path/to/drive" >&2
        printf '  %s\n' "${drives[@]}" >&2
        exit 1
    fi
    drive="${drives[0]}"
fi
if [[ ! -d "${drive}" || ! -w "${drive}" ]]; then
    echo "Not a writable directory: ${drive}" >&2
    exit 1
fi

cd "${PROJECT_ROOT}"
if [[ -n "$(git status --porcelain -- "${HOST_PATHS[@]}")" ]]; then
    echo "Note: uncommitted changes are left out, the archive holds the last commit." >&2
fi
release="radar_system-$(git log -1 --format=%cd --date=format:%Y%m%d-%H%M)-$(git rev-parse --short HEAD)"
out="${drive}/radar_update"
mkdir -p "${out}"
git archive --format=tar.gz --prefix=radar_system/ -o "${out}/${release}.tar.gz" HEAD "${HOST_PATHS[@]}"
git show HEAD:deploy/update.sh > "${out}/update.sh"
sync

echo "Written to ${out}:"
echo "  ${release}.tar.gz"
echo "  update.sh"
echo "On the device, from the drive's folder:  bash radar_update/update.sh"