mutating func validate()

in Sources/swift-format/Subcommands/LintFormatOptions.swift [78:100]

• 21 lines of code
• 9 McCabe index (conditional complexity)

  mutating func validate() throws {
    if recursive && paths.isEmpty {
      throw ValidationError("'--recursive' is only valid when formatting or linting files")
    }

    if assumeFilename != nil && !paths.isEmpty {
      throw ValidationError("'--assume-filename' is only valid when reading from stdin")
    }

    if !paths.isEmpty && !recursive {
      for path in paths {
        var isDir: ObjCBool = false
        if FileManager.default.fileExists(atPath: path, isDirectory: &isDir), isDir.boolValue {
          throw ValidationError(
            """
            '\(path)' is a path to a directory, not a Swift source file.
            Use the '--recursive' option to handle directories.
            """
          )
        }
      }
    }
  }