awesome-cli-frameworks

Worth noting that you can do this in languages other than Rust. Python, for example, has https://github.com/fastapi/typer. https://github.com/shadawck/awesome-cli-frameworks lists relevant libraries in many languages, though not all of them support clap-style structured parsing.

I like this one for .NET https://github.com/spectreconsole/spectre.console which I found in this list https://github.com/shadawck/awesome-cli-frameworks.

Oclif was one I used a while back but, last I tried it (a couple of months ago), there were either technical or documentation issues that made it a challenge to get started. It sounded like they were in the middle of fixes though so that might be worth a look. Combined with a solid HTTP package like axios, that would be a good leg up if you are proficient in JS. Good list of options here: https://github.com/shadawck/awesome-cli-frameworks

Thor looks great! I'd be surprised if something similar didn't exist for most languages, but with many of them living in obscurity because discovery is so hard without a well-established name for that class of tool. Some googling for "CLI framework" led me to oclif ("Thor for js"?) and to https://www.nexmo.com/legacy-blog/2020/06/12/comparing-cli-b... , but that can't be everything. PS: https://github.com/shadawck/awesome-cli-frameworks also lists some for go and rust, getting there! (though most probably not half as complete as Thor, self-documentation should definitely be a first-class citizen!)