Additional Path functionality

[ScallyGames]

I'd love to have some additional functions as part of Path

• filename (i.e. filename filename "/home/user/project/file.txt" -> "file")
• extension (i.e. extension "/home/user/project/file.txt" -> "txt")
• basepath (i.e. basepath "/home/user/project/file.txt" -> "/home/user/project")
• combine/join (i.e. combine "/home/user/project/" "file.txt" -> "/home/user/project/file.txt"; combine "/home/user/project/" "../other/file.txt" -> "/home/user/other/file.txt"

While these are not terribly difficult string operations I'd expect the platform "standard library" to have functionality for that, especially since there is a bunch of pitfalls with it (path separator, trailing slashes / non trailing slashes, etc). Furthermore most of these functions could/should probably work with both Path and Str types.

[lukewilliamboswell]

The plan is to make a cross-platform package for working with Paths.

Most of the skeleton/design work is completed here;

https://github.com/roc-lang/path

There's nothing blocking progress afaik, would you be interested in helping with this?

[ScallyGames]

That seems reasonable, I was wondering about the usefulness of having to reimplement Path on any platform that runs on a system like Windows, Mac or Linux.
Not sure if I have capacity but I'll look into it.