File FromConfig

This FromConfig instance provides support for parsing values of type File, which is a newtype wrapping Filepath.

Filepath and overrides

This instance can read a filepath as a File, but if any more specific value is given that value will be used instead.

So if you have FILE_EXTENSION=jpg and cli arg --file=someFile.png, the file will be read as someFile.jpg since "file.extension" is more specific than "file". This may change in the future but that's the current behavior, if enough people find this confusing we may change it.

`extension :: String`

The file extension.

Example: md in docs/fromConfig/file.md.

`dirname :: String`

The path without the filename.

Example: docs/fromConfig in docs/fromConfig/file.md.

`basename :: String`

The filename without the extension.

Example: file in docs/fromConfig/file.md.

`filename :: String`

The filename (basename + extension).

Example: file.md in docs/fromConfig/file.md.