Raise proper message on error

rusterlium · Oct 25, 2021 · 0976bd8 · 0976bd8
1 parent bfbd9cf
commit 0976bd8
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/rustler_mix/lib/rustler/compiler/config.ex b/rustler_mix/lib/rustler/compiler/config.ex
@@ -77,8 +77,14 @@ defmodule Rustler.Compiler.Config do
   defp external_resources(crate_path, crate) do
     crate_str = to_string(crate)
 
-    {metadata, 0} =
-      System.cmd("cargo", ~w(metadata --format-version=1), cd: crate_path)
+    metadata =
+      case System.cmd("cargo", ~w(metadata --format-version=1), cd: crate_path) do
+        {metadata, 0} ->
+          metadata
+
+        {output, code} ->
+          raise "calling `cargo metadata` failed. Output:\n" <> output
+      end
 
     json = Jason.decode!(metadata)