scripts/lib/helpers.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.

# Returns true if colors are supported.
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
}

# echo-warning prints a line to stderr with a yellow WARNING: prefix.
function echo-warning {
  if is-stderr-tty
  then
    echo -e >&2 "\033[1;33mWARNING:\033[0m $*"
  else
    echo -e >&2 "WARNING: $*"
  fi
}

# echo-error prints a line to stderr with a red ERROR: prefix.
function echo-error {
  if is-stderr-tty
  then
    echo -e >&2 "\033[1;31mERROR:\033[0m $*"
  else
    echo -e >&2 "ERROR: $*"
  fi
}

function ensure-embedder-dir {
  if [[ -z "${FUCHSIA_EMBEDDER_DIR}" ]]
  then
    echo-error '$FUCHSIA_EMBEDDER_DIR must be set to your flutter-embedder folder before running this command.'
    echo-error 'Add this line to your shell profile:'
    echo-error "export FUCHSIA_EMBEDDER_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && cd ../.. && pwd)"
    exit 1
  fi
}

embedder_depot_tools="${FUCHSIA_EMBEDDER_DIR}"/third_party/depot_tools
embedder_engine_dir="${FUCHSIA_EMBEDDER_DIR}"/third_party/engine/src

function ensure-engine-dir {
  if [ ! -d "${embedder_engine_dir}" ]
  then 
    echo-error 'You must set up your Engine development environment before running this command.'
    echo-error 'To do this, run:'
    echo -e >&2 '$FUCHSIA_EMBEDDER_DIR/scripts/setup_engine.sh --github-username my_username'
    exit 1
  fi
}

function ensure-local-fuchsia-platform-build {
  if [[ -z "${LOCAL_FUCHSIA_PLATFORM_BUILD}" ]]
  then
    echo-error '$LOCAL_FUCHSIA_PLATFORM_BUILD must be set to a Fuchsia out/ directory before running this command.'
    echo-error 'For example:'
    echo -e >&2 'export LOCAL_FUCHSIA_PLATFORM_BUILD=$FUCHSIA_DIR/out/default'
    exit 1
  fi
}