handleError function

void handleError(DerryError e)

Handles errors based on ErrorCode.

Implementation

void handleError(DerryError e) {
  final buffer = StringBuffer();
  final prefix = 'derry ${"ERR!".red()}';

  buffer.writeln(
    '$prefix Code ${e.type.name.cyan()}',
  );

  switch (e.type) {
    case ErrorCode.scriptNotDefined:
      final scriptRun = e.body['script'] as String;
      final suggestions = e.body['suggestions'] as List<String>;

      buffer.writeln('$prefix Unable to find script named "$scriptRun".');

      final bestMatch = StringSimilarity.findBestMatch(scriptRun, suggestions).bestMatch;
      if (bestMatch.rating != null && bestMatch.rating! >= 0.5) {
        buffer.writeln();
        buffer.writeln('$prefix Did you mean to run this?');
        buffer.writeln('$prefix    ${bestMatch.target}');
      }
      break;

    case ErrorCode.invalidScript:
      final scriptRun = e.body['script'] as String;
      final paths = e.body['paths'] as List<String>? ?? [];
      final nestedScripts = paths.where((path) => path.startsWith('$scriptRun ')).toList();

      if (nestedScripts.isNotEmpty) {
        buffer.writeln('$prefix Script "$scriptRun" is a nested script.');

        final bestMatch = StringSimilarity.findBestMatch(scriptRun, nestedScripts).bestMatch;
        if (bestMatch.rating != null && bestMatch.rating! >= 0.5) {
          buffer.writeln();
          buffer.writeln('$prefix Did you mean to run this?');
          buffer.writeln('$prefix    ${bestMatch.target}');
        }
      } else {
        buffer.writeln('$prefix Script definition of "$scriptRun" is invalid.');
      }
      break;

    case ErrorCode.missingScripts:
      buffer.writeln('$prefix Field `scripts` is not defined in `pubspec.yaml`.');
      break;

    case ErrorCode.invalidScripts:
      buffer.writeln('$prefix Type of field `scripts` is invalid.');
      buffer.writeln('$prefix It should be a map of scripts or a file path.');
      break;

    case ErrorCode.fileNotFound:
      final filePath = e.body['path'] as String;
      buffer.writeln('$prefix File not found at "$filePath".');
      break;

    case ErrorCode.invalidYaml:
      final filePath = e.body['path'] as String;
      final origin = e.body['origin'] as Object;

      buffer.writeln('$prefix Incorrect YAML format in "$filePath".');
      buffer.writeln('$prefix Origin $origin');
      break;

    case ErrorCode.invalidYamlMap:
      final filePath = e.body['path'] as String;
      buffer.writeln('$prefix YAML is not a map in "$filePath".');
      break;

    case ErrorCode.platformNotSupported:
      final abi = e.body['abi'] as String?;

      buffer.writeln('$prefix Unsupported plaform.');
      buffer.writeln('$prefix Architecture "$abi" is not supported.');
      break;

    case ErrorCode.invalidPackageUri:
      final packageUri = e.body['packageUri'] as String;

      buffer.writeln('$prefix Unable to resolve package URI "$packageUri".');
      break;

    case ErrorCode.invalidBlob:
      final path = e.body['path'] as String;
      final origin = e.body['origin'] as Object;

      buffer.writeln('$prefix Unable to load dynamic library blob at "$path".');
      buffer.writeln('$prefix Origin $origin');
      break;
  }

  stderr.write(buffer.toString());
}