Silent instead of displaying error message when a target is unavailable (#76)

Author: cocoa-xu

lib/mix/tasks/compile.elixir_make.ex

@@ -156,31 +156,28 @@ defmodule Mix.Tasks.Compile.ElixirMake do
 
         with false <- File.exists?(load_path),
              {:error, message} <- download_or_reuse_nif(config, precompiler, app_priv) do
-          {recover, error_msg} =
+          recover =
             case message do
-              {:unavailable_target, current_target, msg} ->
+              {:unavailable_target, current_target, _description} ->
                 if function_exported?(precompiler, :unavailable_target, 1) do
-                  {precompiler.unavailable_target(current_target), msg}
+                  precompiler.unavailable_target(current_target)
                 else
-                  {:compile, msg}
+                  :compile
                 end
 
               _ ->
-                {:compile, message}
-            end
-
-          case recover do
-            :compile ->
-              Mix.shell().error("""
-              Error happened while installing #{app} from precompiled binary: #{error_msg}.
+                Mix.shell().error("""
+                Error happened while installing #{app} from precompiled binary: #{inspect(message)}.
 
-              Attempting to compile #{app} from source...\
-              """)
+                Attempting to compile #{app} from source...\
+                """)
 
-              precompiler.build_native(args)
+                :compile
+            end
 
-            :ignore ->
-              {:ok, []}
+          case recover do
+            :compile -> precompiler.build_native(args)
+            :ignore -> {:ok, []}
           end
         else
           _ -> {:ok, []}