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PoC to allow NIFs to be loaded from escripts #658

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PoC to allow NIFs to be loaded from escripts #658

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23 changes: 19 additions & 4 deletions rustler_mix/lib/rustler.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -158,13 +158,28 @@ defmodule Rustler do
:code.purge(__MODULE__)

{otp_app, path} = @load_from
app_dir = Application.app_dir(otp_app, path)

load_path =
otp_app
|> Application.app_dir(path)
|> to_charlist()
case System.get_env("ESCRIPT_NAME") do
nil ->
app_dir

escript_path ->
if String.starts_with?(app_dir, escript_path) do
tmp = System.tmp_dir!()
:zip.extract(escript_path,
file_list: [Path.join(otp_app |> Atom.to_string(), path)],
cwd: tmp
)

Path.join(tmp, path)
else
app_dir
end
end

:erlang.load_nif(load_path, _construct_load_data())
:erlang.load_nif(load_path |> to_charlist(), _construct_load_data())
end
end
end
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