add `config_local_dir` (issue #68)

[ReactorScram]

Adds a local config dir which is identical to config_dir on Linux and Mac. On Windows it uses AppData/Local instead of AppData/Roaming.

I only ran the tests on Linux cause I don't know how CI works and I don't have a Mac / Win system handy.

[soc]

Hi @ReactorScram,

thanks for your PR!

Usually I'd require that the function provides behavior that is present on at least one of the supported platforms (and especially with the "local" vs. "roaming" stuff we just fill in the gaps as best as I can elsewhere).

I have to think further how/if we can make sense of this.

Cheers,

Simon

[ReactorScram]

So it's not normal for Windows programs to keep system-specific config in AppData/Local like this?

I also realized, this is actually a Rust implementation of the JVM directories library, right? So I can see why you wouldn't want their APIs to desync.

[daxpedda]

@soc friendly ping.

Currently directories offers no way to get a non-syncing config directory.

Usually I'd require that the function provides behavior that is present on at least one of the supported platforms

Is that not fulfilled? C:\Users\Alice\AppData\Local\Foo Corp\Bar App\config isn't covered by any other method but is present on Windows.

[soc]

@ReactorScram and @daxpedda makes sense. I will merge this and roll a new release after I come back from vacation. Thanks!

[soc]

Merged, thanks @ReactorScram and @daxpedda!