Installing Orb

First, install Elixir and create an Elixir project with say mix new your_project_name.

Add orb to your list of dependencies in mix.exs:

def deps do
  [
    {:orb, "~> 0.2.2"}
  ]
end

Run mix deps.get.

You can now use Orb in your modules:

defmodule Example do
  use Orb

  defw meaning_of_life(), I32 do
    42
  end
end

wasm_bytes = Orb.to_wasm(Example)
webassembly_text_format = Orb.to_wat(Example)

Serving WebAssembly from Phoenix

Within a Phoenix or other Plug app you can send the WebAssembly bytes like so:

defmodule MyController do
  def show(conn, _) do
    wasm_bytes = Orb.to_wasm(Example)

    conn
    |> put_resp_content_type("application/wasm", nil)
    |> send_resp(200, wasm_bytes)
  end
end