fromInternalString static method

Implementation

static GitRef fromInternalString(String internalString) {
  if (!internalString.startsWith('GIT:')) {
    throw ArgumentError('Invalid internal git ref string: $internalString');
  }

  final withoutPrefix = internalString.substring(4); // Remove 'GIT:'

  // Find the last colon to separate ref from URI+path
  final lastColonIndex = withoutPrefix.lastIndexOf(':');
  if (lastColonIndex == -1) {
    throw ArgumentError('Invalid internal git ref string: $internalString');
  }

  final uriWithPath = withoutPrefix.substring(0, lastColonIndex);
  final refPart = withoutPrefix.substring(lastColonIndex + 1);
  final actualRef = refPart == 'HEAD' ? null : refPart;

  // Parse URI and path using regex
  String uri;
  String? path;

  if (uriWithPath.startsWith('https://')) {
    final httpsPattern =
        RegExp(r'^(https://[^/]+/[^/]+/[^/]+(?:\.git)?)((?:/.+)?)$');
    final match = httpsPattern.firstMatch(uriWithPath);
    if (match != null) {
      uri = match.group(1)!;
      final pathPart = match.group(2);
      path = pathPart?.isNotEmpty == true && pathPart!.startsWith('/')
          ? pathPart.substring(1)
          : pathPart?.isNotEmpty == true
              ? pathPart
              : null;
    } else {
      uri = uriWithPath;
      path = null;
    }
  } else if (uriWithPath.contains('@')) {
    final sshPattern =
        RegExp(r'^([^@]+@[^:]+:[^/]+/[^/]+(?:\.git)?)((?:/.+)?)$');
    final match = sshPattern.firstMatch(uriWithPath);
    if (match != null) {
      uri = match.group(1)!;
      final pathPart = match.group(2);
      path = pathPart?.isNotEmpty == true && pathPart!.startsWith('/')
          ? pathPart.substring(1)
          : pathPart?.isNotEmpty == true
              ? pathPart
              : null;
    } else {
      uri = uriWithPath;
      path = null;
    }
  } else {
    uri = uriWithPath;
    path = null;
  }

  return GitRef._(uri: uri, path: path, ref: actualRef);
}