lib/src/utils.dart

// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library metatest.utils;

/// Prepends each line in [text] with [prefix]. If [firstPrefix] is passed, the
/// first line is prefixed with that instead.
String prefixLines(String text, {String prefix: '| ', String firstPrefix}) {
  var lines = text.split('\n');
  if (firstPrefix == null) {
    return lines.map((line) => '$prefix$line').join('\n');
  }

  var firstLine = "$firstPrefix${lines.first}";
  lines = lines.skip(1).map((line) => '$prefix$line').toList();
  lines.insert(0, firstLine);
  return lines.join('\n');
}