Document interaction with Swift Argument Parser

[herzi]

I have been using ArgumentParser in my projects to allow having multiple commands like http-service or smoke-test, etc. This makes me curious: How would I bridge the gap between swift-configuration and swift-argument-parser providing me with a way to use both in my project?

[czechboy0]

Hi @herzi - Swift Configuration definitely isn't meant to replace Swift Argument Parser.

It just has the cli provider for convenience, when CLI options are just one of many different sources of your app's configuration.

And since Swift Configuration won't help you with different commands, it's really most useful for CLIs that only have a single command (such as a web server that has an implicit serve command).

More generally: Swift Argument Parser is best in the world when you're reading your configuration directly in your tool (as opposed to libraries), and when you know the exact options at compile time. Swift Configuration is more dynamic, and allows your application and libraries to read any configuration keys, even when those aren't known at compile time.

Since this is not the first time this question was asked, let me repurpose this issue to track adding an FAQ for it.

[herzi]

Thanks, @czechboy0, this aligns with my previous understanding. I was just wondering how I could use both in order to get best-in-class argument parsing AND the flexibility provided by swift-configuration.