search

knqyf263 / go-plugin

Go Plugin System over WebAssembly
MIT License
573 stars 27 forks source link

exposing filesystem from plugin to host #21

Closed amlwwalker closed 1 year ago

amlwwalker commented 1 year ago

In the example here it is outlined that the host can pass an embedded FS to the plugin and the plugin will only be able to access content within that embedded filesystem.

Is it possible to "pass" a filesystem the other way - i.e from plugin to host?

I have embedded some assets in the plugin with embed.FS and I want the host to be able to access those. Is there a way to expose the FS to the host?

dmvolod commented 1 year ago

Hi @amlwwalker Yes, it's possible to do with wazero WithFSConfig(FSConfig) ModuleConfig function, but not implemented inside plugin generator. https://github.com/tetratelabs/wazero/blob/e2ebce5d230eceff7d89e4d8677a166dd9ebabca/config.go#L450-L454

Tested with following code, and seems to working fine

    // Combine the above into our baseline config, overriding defaults.
    fsc := wazero.NewFSConfig().WithDirMount("/home/dvolodin", "/")
    config := wazero.NewModuleConfig().
        // By default, I/O streams are discarded and there's no file system.
        WithStdout(opt.Stdout).WithStderr(opt.Stderr).WithFSConfig(fsc)
codefromthecrypt commented 1 year ago

So, I guess what we need to do here is to generate code to allow moduleconfig or config for the runtime itself. maybe like this? https://github.com/http-wasm/http-wasm-host-go/blob/main/handler/options.go#L14-L23