scripts/build_and_run_example.sh

#!/bin/bash
# Copyright 2022 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.
#
# Prerequisites:
#   1. $FUCHSIA_EMBEDDER_DIR is set to your flutter-embedder.git checkout directory.
#   2. You are currently running Workstation (`ffx emu start --headless workstation_eng.qemu-x64`).
#
# TODO(akbiggs): Port this workflow to Bazel.

set -e # Exit if any program returns an error.

far_debug_dir=/tmp/"${app_name}"_far_contents
far_tool="${FUCHSIA_EMBEDDER_DIR}"/bazel-flutter-embedder/external/fuchsia_sdk/tools/x64/far

# Parse arguments.
headless=0
app_name="hello_flutter"
while [[ $# -gt 0 ]]; do
  case $1 in
    --headless)
      echo "--headless apps will not work yet because there's no collection to run JIT components in."
      headless=1
      shift # past argument
      ;;
    *)
      app_name="$1"
      shift # past value
      ;;
  esac
done

session_args="-- --session"
release_args=
if [[ "${headless}" -ne 0 ]]
then
  session_args=
  release_args="--release"
fi

function is-stderr-tty {
  [[ -t 2 ]]
}

# echo-info prints a line to stderr with a green INFO: prefix.
function echo-info {
  if is-stderr-tty; then
    echo -e >&2 "\033[1;32mINFO:\033[0m $*"
  else
    echo -e >&2 "INFO: $*"
  fi
}

pushd "${FUCHSIA_EMBEDDER_DIR}"

echo-info "Building Flutter sample app bundle."
cd "${FUCHSIA_EMBEDDER_DIR}"/src/examples/"${app_name}"
"${FUCHSIA_EMBEDDER_DIR}"/tools/flutter build bundle

echo-info "Running Flutter sample app."
cd "${FUCHSIA_EMBEDDER_DIR}"
"${FUCHSIA_EMBEDDER_DIR}"/tools/bazel run --config=fuchsia_x64 //src/examples/"${app_name}":"${app_name}"_pkg.component ${session_args}

echo-info "Package contents for debugging:"
"${far_tool}" extract --archive="${FUCHSIA_EMBEDDER_DIR}"/bazel-bin/src/examples/"${app_name}"/"${app_name}".far --output="${far_debug_dir}"
"${far_tool}" extract --archive="${far_debug_dir}"/meta.far --output="${far_debug_dir}"
cat "${far_debug_dir}"/meta/contents
rm -r "${far_debug_dir}"

popd