Make vm public

[voidxnull]

Might be pretty useful. Alternatively, a getter method can be implemented instead.

[poga]

Do you have any use cases that requires direct access to the vm?

actix-lua configure its Lua vm with prelude.lua before loading user scripts. People can easily break it if they have direct access to the vm.

I do see the need of customizing the behavior of actix-lua. Maybe in the form of hooks?

[voidxnull]

I have a use case: to create lua bindings for external libraries (crypto, templates, etc.) Using messages to implement bindings seems unnecessarily clunky and non-reusable. Besides, how badly does one need to screw up to replace prefixed globals?

If you think that it's dangerous to make the vm completely public, there is another way to expose it: add a
new method LuaActorBuilder::with_vm which accepts a closure and pass the closure to LuaActor::new in LuaActorBuilder::build that can be used for initializing the vm before executing prelude.lua. That way all operations on the vm will be localized. I personally think this is unnecessary, but the decision is yours.

What do you think?

[poga]

My main concern is that by making it public, it encourages people to do whatever they want to the vm, including all the internal APIs. It makes all the internal Lua implementation public, make it hard to change the internal API without introduce breaking changes to the user.

I like the idea of LuaActorBuilder::with_vm👍! It clearly tells the user that "you should only do this when initializing a new actor".

Can you help me implement it? I can do it but you might have to wait.

[voidxnull]

Ok, I'll do it.

[voidxnull]

Done. I had to change the builder methods to take self by value to make it work.

[poga]

Can you add tests for it?

[voidxnull]

Done.

[poga]

merged. Thanks!

[poga]

v0.3.1 released! 🎉

[voidxnull]

Thank you!