#!/bin/bash
# Copyright 2020 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

#### CATEGORY=Software delivery
### make a zedboot USB key

## usage: fx mkzedboot-remote HOST [DIR] [--no-build] [--no-check-ssh-keys] --usb USB_DEVICE [--force]
##  --no-build           do not build, just pull artifacts already present
##  --no-check-ssh-keys  do not verify that the default SSH credentials are the
##                       same before paving.
##
##  HOST                 the hostname to connect to
##  DIR                  defaults to ~/fuchsia, the path to the FUCHSIA_DIR on HOST
##
##  --force              force writing to a non-usb target
##
## HOST and DIR are persisted in the file //.fx-remote-config and are reused as
## defaults in future invocations of any 'fx *-remote' tools.

set -o errexit

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/vars.sh || exit $?
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/fx-mkzedboot.sh || exit $?
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/fx-remote.sh || exit $?
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/verify-default-keys.sh || exit $?
fx-config-read

# Get build artifacts from remote

host=""
dir=""
build=true
check_ssh_keys=true
force=false
usb_device=""

while [[ $# -ne 0 ]]; do
  case "$1" in
  --help|-h)
      fx-command-help
      exit 0
      ;;
  --no-build)
    build=false
    ;;
  --no-check-ssh-keys)
    check_ssh_keys=false
    ;;
  --usb)
    shift
    usb_device=$1
    ;;
  --force)
    force=true
    ;;
  -*)
    fx-error "Unknown flag: $1"
    fx-command-help
    exit 1
    ;;
  *)
    if [[ -z "${host}" ]]; then
      host="$1"
    elif [[ -z "${dir}" ]]; then
      dir="$1"
    else
      fx-error "unexpected argument: '$1'"
      exit 1
    fi
    ;;
  esac
  shift
done

if cached=( $(load_remote_info "$host") ); then
  host="${cached[0]}"
  dir="${cached[1]}"
fi

if [[ -z "${host}" ]]; then
  fx-error "HOST must be specified"
  fx-command-help
  exit 1
fi

if [[ -z "${dir}" ]]; then
  if ssh "$host" ls \~/fuchsia/.jiri_root/bin/fx > /dev/null; then
    dir="~/fuchsia"
  else
    fx-error "failed to find ~/fuchsia on $host, please specify DIR"
    fx-command-help
    exit 1
  fi
fi

# Verify that keys match.
if "${check_ssh_keys}"; then
  verify_default_keys "${FUCHSIA_DIR}" "${host}" "${dir}" || exit $?
fi

save_remote_info "$host" "$dir"

authkeys_path="$(get-ssh-authkeys)" || {
  fx-error "Cannot continue without a valid authorized keys file."
  exit 1
}

artifact_dir="${FUCHSIA_DIR}/out/fetched"

image=""
type=""

# Try to get image for efi, if not found, try to get vboot image for cros
image="$(ssh "${host}" "cd '$dir' && .jiri_root/bin/fx list-build-artifacts --allow-empty --type blk mkzedboot")"
type="efi"
if [[ -z "${image}" ]]; then
   image="$(ssh "${host}" "cd '$dir' && .jiri_root/bin/fx list-build-artifacts --allow-empty --type zbi.signed mkzedboot")"
   type="vboot"
fi

if [[ -z "${image}" ]]; then
  fx-error "Cannot find image to run mkzedboot. Re-check build board and product."
  exit 1
fi

remote_build_dir="$(get_remote_build_dir "${host}" "${dir}")"
mkdir -p "${artifact_dir}"
# --relative ensures that the ZBI is copied to out/fetched relative to the
# '/./' (i.e., the build directory).
rsync --compress --partial --progress --relative "${host}:${remote_build_dir}/./${image}" "${artifact_dir}" || exit $?


if [[ -z "${usb_device}" ]]; then
  echo >&2 "device argument required"
  echo "USB disks:"
  fx-command-run list-usb-disks
  exit 1
fi

fx-mkzedboot "${usb_device}" "${type}" "${artifact_dir}/${image}" $force