OpenDAL Golang Binding

[Xuanwo]

We know golang doesn't play well with C/CPP/Rust but we can do our best to build a golang binding.

We will build a golang lib that can:

• static/dynamic/build from source to libopendal with CGO
• dlopen libopendal without CGO via purego

We expect to see users use it like:

package main

import (
    "fmt"

    opendal "opendal.apache.org/go"
)

func main() {
    fmt.Println(opendal.Xxxx)
}

Tasks

• Wait for libopendal (OpenDAL C API #1201)

[odysa]

What do you think about this example?
https://github.com/mediremi/rust-plus-golang

[Xuanwo]

What do you think about this example?

Thank you for providing this example. This issue is currently blocked by missing a opendal-c lib.

[gaby]

@Xuanwo is this still blocked after the merge of #1861 ?

[Xuanwo]

@Xuanwo is this still blocked after the merge of #1861 ?

No, let's have a try!

[ImSingee]

Hope to see it 👀. And if need, I can give a help.

[Xuanwo]

I'm a bit worried about how to release a go package. But we can start to make it work first!

[ImSingee]

@Xuanwo By the way, my suggestion about the CGO or dlopen

1. If build with a CGO_ENABLED=1 environment (which can be determined by a cgo tag) then use CGO
2. Or else, fallback to the dlopen

[Xuanwo]

1. If build with a CGO_ENABLED=1 environment (which can be determined by a cgo tag) then use CGO

How to build a rust project by cgo? (NOTE, opendal-c also requires rustc to build opendal first)

2. fallback to the dlopen

So the problem becomes how to release opendal-c itself (users maybe need to have opendal-c lib at local first)

[ImSingee]

@Xuanwo Oh, so sad about the status😂

Maybe we should wait until we have something like libopendal.so or libopendal.a. And after that, everything will be simple (not requires user to build from rust).

[Xuanwo]

Maybe we should wait until we have something like libopendal.so or libopendal.a. And after that, everything will be simple (not requires user to build from rust).

Yes, they are what I'm worry about. But we can start our work first anyway~

[Xuanwo]

I start a PR here for comments: #2488

[Xuanwo]

work has been started at #3205