tools/devshell/flash

#!/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.

#### CATEGORY=Device management
### flash and, optionally, pave a connected device
## usage: fx flash [-s <serial>] [--build|--no-build] [--pave]
##   --build | --no-build    Build (or not) the required dependencies
##   --pave                  Pave device after flashing (recommended)
##   -s                      Serial of device you wish to flash to (only necessary
##                           if multiple devices in fastboot mode)
##
## Defaults are defined by the "incremental" feature:
##    'fx --enable=incremental flash'  defaults to "--build"
##    'fx --disable=incremental flash'  defaults to "--no-build"

set -e

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/image_build_vars.sh || exit $?
source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/fx-flash.sh || exit $?

usage() {
    fx-command-help
    echo "Available devices:"
    fx-command-run host-tool fastboot devices -l
    exit 1
}

build=false
if is_feature_enabled "incremental"; then
  # In incremental workflows, these defaults have changed.
  # Keep old behavior if incremental is not enabled.
  build=true
fi
pave=false
serial=
device=$(get-device-name)
while [[ $# -ge 1 ]]; do
  case "$1" in
  -h|--help)
    usage
    ;;
  --no-build)
    build=false
    ;;
  --build)
    build=true
    ;;
  --pave)
    pave=true
    ;;
  --nopave|--no-pave)
    pave=false
    ;;
  -s)
    shift
    serial="$1"
    ;;
  -device)
    shift
    device="$1"
    ;;
  *)
    break
  esac
  shift
done

if $build; then
  artifacts=($(fx-command-run list-build-artifacts flash)) || exit $?
  if $pave; then
    artifacts+=($(fx-command-run list-build-artifacts pave)) || exit $?
  fi
  fx-info "Building/refreshing targets ${artifacts[@]}"
  fx-command-run build "${artifacts[@]}"
fi

if is-remote-workflow-device; then
  fx-error "It is not possible to flash a device over a remote tunnel, as flashing requires a direct USB connection."
  fx-error "Use \`fx flash-remote\` from the local side of the link in these secarios."
  fx-error "A lightweight build on the local side is: \`fx set core.x64 && fx self-build\`"
  echo >&2
  fx-error "If you are not using a remote workflow, run \`fx unset-device\` to remove the remote device configuration."
  exit 1
fi

flash_manifest="${FUCHSIA_BUILD_DIR}/$(fx-command-run list-build-artifacts --expect-one --name flash-manifest images)"
cd "${FUCHSIA_BUILD_DIR}"
fx-flash "${serial}" "${device}" "${flash_manifest}"

if $pave; then
  # no need to build, since all dependencies were already built above.
  fx-command-exec pave -1 --no-build
fi