formatUri function

String formatUri(String? uri, { String? cwd, })

Format a URI to a relative path if possible.

Implementation

String formatUri(String? uri, {String? cwd}) {
  if (uri == null || uri.isEmpty) {
    return '<unknown location>';
  }

  var filePath = uri.replaceFirst(RegExp(r'^file://'), '');
  // Windows drive-letter paths: /C:/path → C:/path
  if (RegExp(r'^/[A-Za-z]:').hasMatch(filePath)) {
    filePath = filePath.substring(1);
  }

  // Decode URI encoding.
  try {
    filePath = Uri.decodeFull(filePath);
  } catch (_) {
    // Use un-decoded path on failure.
  }

  // Convert to relative path if cwd provided.
  if (cwd != null && cwd.isNotEmpty) {
    if (filePath.startsWith(cwd)) {
      var relative = filePath.substring(cwd.length);
      if (relative.startsWith('/') || relative.startsWith('\\')) {
        relative = relative.substring(1);
      }
      // Normalize separators.
      relative = relative.replaceAll('\\', '/');
      if (relative.length < filePath.length && !relative.startsWith('../../')) {
        return relative;
      }
    }
  }

  return filePath.replaceAll('\\', '/');
}