Trying to pack ruby for icp

[graial]

Greetings!

I decided recently to see if I could deploy Rails to Internet Computer.
They are only starting to get Wordpress partially deployed at the moment. So this is a frontier deployment.

So far, I know that I need to provide some polyfills for the wasi-snapshot-preview1 and am still learning the specifics of the runtime.

I also understand that a rails app on ICP will need to be split up into serverless functions.

For now, I'm just trying to get a successful build. If it's successful, I wonder if/how you would want to add this support?

What I've done

With this PR, I've generated a new build profile called wasm32-unknown-icp.

What's working

I can compile, pack and run the quick example on wasip1

I can compile for emscripten & icp targets using the command rake --verbose build:3.3-wasm32-unknown-icp-full

What's not working

I cannot convert the wasip1 build to ic using wasi2ic. I end up with lots of incompatible imports from the wasi-snapshot-preview1 (see discussion here)

I cannot pack the quick example on emscripten or icp. they fail with:

lib/ruby_wasm/cli.rb:178:in `run_cli': failed to run wasi vfs cli:
magic header not detected: bad magic number - expected=[ (StandardError) 0x0, 0x61, 0x73, 0x6d,] actual=[ 0x23, 0x21, 0x2f, 0x75,] (at offset 0x0)

I tried emscripten first because the handler seemed simpler. But I think ICP mentioned that wasip1 can be supported. So maybe I can try linking the polyfills into the wasip1 module next.

Side Note: I'm focusing on 3.3 right now because I was able to deploy it via wasmify_rails previously. I was unsuccessful in trying Versions 3.4 or 4