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Mix compiler and runtime helpers for Rustler.

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rustler lib rustler compiler rustup.ex
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lib/rustler/compiler/rustup.ex 

defmodule Rustler.Compiler.Rustup do

  @moduledoc false



  def rustup_binary, do: System.get_env("RUSTUP_BINARY") || "rustup"



  def version do

    multirust_exec = System.find_executable(rustup_binary())



    if multirust_exec == nil do

      :none

    else

      {version, 0} = System.cmd(rustup_binary(), ["--version"])

      {:ok, version}

    end

  end



  def version_installed?(version) do

    {_resp, return} = System.cmd(rustup_binary(), ["run", version, "rustc", "--version"])



    case return do

      0 -> true

      _ -> false

    end

  end



  # def rust_versions do

  #  {versions_raw, 0} = System.cmd("rustup", ["list-toolchains"])

  #  versions_raw

  #  |> String.strip(?\n)

  #  |> String.split("\n")

  # end



  def install_toolchain(version) do

    {_resp, 0} = System.cmd(rustup_binary(), ["install", version], into: IO.stream(:stdio, :line))

  end



  def compile_with(path, version, args \\ [], env \\ [], into \\ "") do

    System.cmd(rustup_binary(), ["run", version, "cargo", "build" | args],

      cd: path,

      into: into,

      env: env

    )

  end

end