Ensure not to call Mix.target in runtime (#119)

* Ensure not to call Mix.target in runtime

* remove invalid target check

* bump version to 1.4.3

lib/bundlex.ex

@@ -19,6 +19,7 @@ defmodule Bundlex do
   """
   @type target ::
           %{architecture: String.t(), vendor: String.t(), os: String.t(), abi: String.t() | nil}
+
   @doc """
   A function returning a target triplet for the environment on which it is run.
   """

lib/bundlex/loader.ex

@@ -74,9 +74,7 @@ defmodule Bundlex.Loader do
         @moduledoc false
         require unquote(__MODULE__)
 
-        if unquote(Mix.target() == :host) do
-          @on_load :load_nif
-        end
+        @on_load :load_nif
 
         @spec load_nif() :: :ok | no_return()
         def load_nif() do

lib/bundlex/platform.ex

@@ -41,17 +41,14 @@ defmodule Bundlex.Platform do
   Otherwise raises Mix error.
   """
   @spec get_target!() :: name_t
-  def get_target!() do
-    case {Mix.target(), System.fetch_env("NERVES_APP")} do
-      {:host, _app} ->
-        get_host!()
-
-      {_target, {:ok, _app}} ->
-        :nerves
-
-      {_target, :error} ->
-        IO.warn("Crosscompilation supported only for Nerves systems, assuming host's platform")
-        get_host!()
+  if Mix.target() == :host do
+    def get_target!(), do: get_host!()
+  else
+    def get_target!() do
+      case System.fetch_env("NERVES_APP") do
+        {:ok, _app} -> :nerves
+        :error -> get_host!()
+      end
     end
   end
 

mix.exs

@@ -1,7 +1,7 @@
 defmodule Bundlex.Mixfile do
   use Mix.Project
 
-  @version "1.4.2"
+  @version "1.4.3"
   @github_url "https://github.com/membraneframework/bundlex"
 
   def project do