Tracking issues of Lua binding

[oowl]

Tasks

• introducing new lua binding feat(binding/lua): introduce opendal lua binding #2469
• Setup CI jobs on building and testing ci(workflow): add lua binding test workflow #2478 test(binding/lua): Add more service schema test #2512
• Add contributing docs and complete the readme doc doc(binding/lua): Improve readme doc for contribute and usage #2511
• Support more operations feat(binding/lua): add rename and create_dir operator function #2564
• luarocks package management support and binary release ci(binding/lua): add luarocks package manager support #2558
• fix multi-version mlua feature build workaround bindings: lua multi-version support for luarocks build #2575

[Xuanwo]

Hi, do you how to release a lua package that contains a C dylib?

[Xuanwo]

Seems users who depend on opendal-ruby will need to build opendal by themselves?

For example: https://github.com/openresty/lua-cjson/blob/master/lua-cjson-2.1.0.12-1.rockspec

[oowl]

Yeah, luarocks neet to mannel execute luarocks build, But also we can release opendal to https://luarocks.org/ @Xuanwo, I will add rockspec to lua binding src.

[Xuanwo]

https://luarocks.org/ supports binary release like pypi does?

[oowl]

@Xuanwo Yeah, it can support binary release. Wait for my #2558 PR to merge.

[oowl]

Another question is about the support for Lua's async operations. In Lua scenarios such as OpenResty, pure asynchronous operations are required. There doesn't seem to be a good way to make Rust's asynchronous IO work in OpenResty.

[khvzak]

There doesn't seem to be a good way to make Rust's asynchronous IO work in OpenResty.

There are few solutions how to integrate tokio (for example) with openresty.
See mlua-rs/mlua#76 and mlua-rs/mlua#143 for some ideas.

I also have plans to build a bridge between openresty (and libuv) and mlua async functionality.

[oowl]

There doesn't seem to be a good way to make Rust's asynchronous IO work in OpenResty.

There are few solutions how to integrate tokio (for example) with openresty. See khvzak/mlua#76 and khvzak/mlua#143 for some ideas.

I also have plans to build a bridge between openresty (and libuv) and mlua async functionality.

In openresty world, it has a bridge implement named as https://github.com/kingluo/lua-resty-ffi, it support offload all other runtime to other thread, and using eventfd notify nginx worker epoll to resume lua coroutine, I think it was a good solution to mlua async functionality