There are more than 3 OS in the world...

[andoriyu]

On anything other than Windows/macOS/Linux this fails to build because lib.rs suggests using lin.rs, while lib.rs doesn't exist for anything other than Linux.

tl;dr: fixes freebsd and other bsd builds.

Cheers.

[dwijnand]

I think the changes in lib.rs are inspired from https://github.com/soc/directories-rs/pull/28/files, so I think the cfg attributes in lin/mac/win.rs can be dropped entirely.

[andoriyu]

@dwijnand what's the difference between dirs and directories?

[andoriyu]

Probably. Since modules included only when the target matches anyway.

[dwijnand]

dirs is more low-level than directories.

Also:

• The dirs library is a low-level crate designed to provide the paths to standard directories
  as defined by operating systems rules or conventions. If your requirements are more complex,
  e. g. computing cache, config, etc. paths for specific applications or projects, consider using
  directories instead.

(https://github.com/soc/dirs-rs#design-goals)

and the comparison table at https://github.com/soc/dirs-rs#comparison

[dwijnand]

LGTM

[soc]

Thanks to @andoriyu for the PR, and thanks to @dwijnand for the review. I squashed and merged it.

I think there are more changes necessary to reach the platform support of former env::home_dir, but it's a great start! (I have some related ideas for Redox, but that's a long way out.)