Yaegi as your REPL

I had a tough time using Yaegi as a REPL to my project. I was able to (mostly) sort it out. You can use this as an example.

Usage

You need rlwrap installed. If you have it, run make repl.

Otherwise, just go build ./cmd/repl and run that directly.

Either way you should see a REPL pop up. Test it out with:

> a := foo.Capability.DoSomething()
> b := bar.Capability.DoSomething()
> a == b
> 1 + 1

As you can see, foo bars Capability struct is instantiated and automatically imported by the REPL.

I like REPLs. I like Go. Why not both?

Yaegi has some limitations, so don't expect everything to work perfectly
I couldn't make yaegi extract work the way I wanted to. I've did it by hand, as you can check in cmd/repl/imports.go. Maybe there's a better way... feel free to reach out through the issues or, even better, with a PR
I would pretty much prefer a Go tool REPL
I prefer to use REPLs to quickly test some API that I'm building, or just running code for "bookkeeping" tasks related to the application I'm developing. This looks like a good approach for the latter, but not the former. Maybe if yaegi extract worked we could have both? Maybe I want a task runner? Yes, this is rambling
I really want the Go tool to have a REPL