scripts/lib/echo_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
}