tryParse static method

OutputSpec? tryParse(String? value)

Parses a spec string of the form <format> or <format>:<file>.

The string is split at the first colon, so file paths may themselves contain colons (e.g. json:C:/out.json → file C:/out.json). Returns null for null, an empty string, or an unrecognized format. A trailing empty file part (csv:) yields a spec with no filePath.

Implementation

static OutputSpec? tryParse(String? value) {
  if (value == null || value.isEmpty) return null;

  final colonIdx = value.indexOf(':');
  if (colonIdx == -1) {
    final format = OutputFormat.tryParse(value);
    if (format == null) return null;
    return OutputSpec(format: format);
  }

  final formatStr = value.substring(0, colonIdx);
  final filePath = value.substring(colonIdx + 1);
  final format = OutputFormat.tryParse(formatStr);
  if (format == null) return null;
  return OutputSpec(
    format: format,
    filePath: filePath.isEmpty ? null : filePath,
  );
}