func mergingCompositeArguments()

in Sources/ArgumentParser/Usage/DumpHelpGenerator.swift [50:78]

• 25 lines of code
• 5 McCabe index (conditional complexity)

  func mergingCompositeArguments() -> ArgumentSet {
    var arguments = ArgumentSet()
    var slice = self[...]
    while var argument = slice.popFirst() {
      if argument.help.isComposite {
        // If this argument is composite, we have a group of arguments to
        // merge together.
        let groupEnd = slice
          .firstIndex { $0.help.keys != argument.help.keys }
          ?? slice.endIndex
        let group = [argument] + slice[..<groupEnd]
        slice = slice[groupEnd...]

        switch argument.kind {
        case .named:
          argument.kind = .named(group.flatMap(\.names))
        case .positional, .default:
          break
        }

        argument.help.valueName = group.map(\.valueName).first { !$0.isEmpty } ?? ""
        argument.help.defaultValue = group.compactMap(\.help.defaultValue).first
        argument.help.abstract = group.map(\.help.abstract).first { !$0.isEmpty } ?? ""
        argument.help.discussion = group.map(\.help.discussion).first { !$0.isEmpty } ?? ""
      }
      arguments.append(argument)
    }
    return arguments
  }