package cargo.toml

src/compiler/rust.rs

@@ -1896,6 +1896,27 @@ impl pkg::InputsPackager for RustInputsPackager {
             let dist_input_path = path_transformer.as_dist(&input_path).with_context(|| {
                 format!("unable to transform input path {}", input_path.display())
             })?;
+
+            if input_path.ends_with("src/lib.rs") {
+                let cargo_toml_path = input_path
+                    .parent()
+                    .expect("No parent")
+                    .parent()
+                    .expect("No parent")
+                    .join("Cargo.toml");
+                if cargo_toml_path.is_file() {
+                    let dist_cargo_toml_path = path_transformer
+                        .as_dist(&cargo_toml_path)
+                        .with_context(|| {
+                            format!(
+                                "unable to transform input path {}",
+                                cargo_toml_path.display()
+                            )
+                        })?;
+                    tar_inputs.push((cargo_toml_path, dist_cargo_toml_path))
+                }
+            }
+
             tar_inputs.push((input_path, dist_input_path))
         }