pave-prebuilt

#!/bin/bash
# Copyright 2018 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.

function help {
  cat <<END

usage: pave-prebuilt <prebuilt-path>

Take the pre-built path and use it to pave a device. The pre-built path may
point to a directory or a TAR-ed (and optionally gzipped) file.

The pre-built should contain the following
  - bootserver in a directory called 'tools'
  - zircon.bin at its root
  - any relevant kernel bootdatas at its root
  - the args.gn used to do the build that produced these outputs at the root
  - an 'images' directory containing the images to feed to bootserver

END
}

function file_to_dir {
  local filename=$(basename "$1")
  filename="${filename%%\.tar*}"
  echo "${filename}"
}

function expand_archive {
  local tar_dir="$2"
  if [[ ! -d "$tar_dir" ]]; then
    mkdir -p -- "$tar_dir"
  fi

  local tar_flags="-xf"

  local strip_gz="${1%%\.tar\.gz}"
  if [[ "${strip_gz}" != "$1" ]]; then
    tar_flags="${tar_flags}z"
  fi

  tar "${tar_flags}" "$1" -C "$tar_dir" &>/dev/null
  if [[ $? -eq 0 ]]; then
    echo "${tar_dir}"
  else
    echo ""
  fi
}

function main {
  if [[ "$1" == "-h" ]] || [[ "$1" == "--help" ]]; then
     help
     return 0
  fi

  if [[ $# -lt 1 ]]; then
    >&2 echo "A path to a directory or compressed file must be supplied."
    help
    return 1
  fi

  local top_level_dir="$(pwd)/$(dirname $(dirname "${BASH_SOURCE[0]}"))/"

  local dir_src
  if [[ $# -lt 1 ]]; then
    echo "Please supply a file or directory to containing the build to use"
    help
    return 1
  fi

  if [[ -d "$1" ]]; then
    dir_src="$1"
  elif [[ -f "$1" ]]; then
    local targ_dir=$(file_to_dir "$1")
    local clean_tld="${top_level_dir%/}"
    targ_dir="${clean_tld}/${targ_dir}"
    echo "Expanding '${1}' to '${targ_dir}'"
    dir_src=$(expand_archive "$1" "${targ_dir}")
    if [[ -z "${dir_src}" ]]; then
      >&2 echo "Archive expansion failed!"
      return 1
    fi
  else
    >&2 echo "Supplied path '${1}' is invalid"
    help
    return 1
  fi

  echo "Starting bootserver"

  $(FUCHSIA_DIR="${top_level_dir}" "${top_level_dir}/scripts/fx" use "${dir_src}")
  $(FUCHSIA_DIR="${top_level_dir}" "${top_level_dir}/scripts/fx" boot --artifacts "${dir_src}")
}

main "$@"