---
title: "url(forOption:)"
framework: fskit
role: symbol
role_heading: Instance Method
path: "fskit/fstaskoptions/url(foroption:)"
---

# url(forOption:)

Retrieves a URL for a given option.

## Declaration

```swift
func url(forOption option: String) -> URL?
```

## Parameters

- `option`: The option for which to retrieve the URL. This value doesn’t include leading dashes.

## Discussion

Discussion Some command-line options refer to paths that indicate a location in which the module needs access to a file outside of its container. FSKit passes these paths as a URL tagged by the option name. For example, "-B" "./someFile" returns the URL for ./someFile when passed an option "B". To indicate that your module treats a given option as a path, include it in the pathOptions dictionary within a command options dictionary (FSActivatOptionSyntax, FSCheckOptionSyntax, or FSFormatOptionSyntax). This dictionary uses the command option name as a key, and each entry has a value indicating what kind of entry to create.