Add --derive-for-type to cli (#708)

* Add `--derive-for-type` to cli

* Remove clippy warnings

testing/test-runtime/build.rs

@@ -80,7 +80,7 @@ async fn run() {
     // Save metadata to a file:
     let out_dir = env::var_os("OUT_DIR").unwrap();
     let metadata_path = Path::new(&out_dir).join("metadata.scale");
-    fs::write(&metadata_path, &metadata_bytes.0).expect("Couldn't write metadata output");
+    fs::write(&metadata_path, metadata_bytes.0).expect("Couldn't write metadata output");
 
     // Write out our expression to generate the runtime API to a file. Ideally, we'd just write this code
     // in lib.rs, but we must pass a string literal (and not `concat!(..)`) as an arg to `runtime_metadata_path`,
@@ -101,7 +101,7 @@ async fn run() {
             .expect("Path to metadata should be stringifiable")
     );
     let runtime_path = Path::new(&out_dir).join("runtime.rs");
-    fs::write(&runtime_path, runtime_api_contents)
+    fs::write(runtime_path, runtime_api_contents)
         .expect("Couldn't write runtime rust output");
 
     let substrate_path =

testing/ui-tests/src/lib.rs

@@ -28,21 +28,21 @@ fn ui_tests() {
     t.pass("src/correct/*.rs");
 
     // Check that storage maps with no keys are handled properly.
-    t.pass(&m.path_to_ui_test_for_metadata(
+    t.pass(m.path_to_ui_test_for_metadata(
         "storage_map_no_keys",
         storage::metadata_storage_map_no_keys(),
     ));
 
     // Test that the codegen can handle the different types of DispatchError.
-    t.pass(&m.path_to_ui_test_for_metadata(
+    t.pass(m.path_to_ui_test_for_metadata(
         "named_field_dispatch_error",
         dispatch_errors::metadata_named_field_dispatch_error(),
     ));
-    t.pass(&m.path_to_ui_test_for_metadata(
+    t.pass(m.path_to_ui_test_for_metadata(
         "legacy_dispatch_error",
         dispatch_errors::metadata_legacy_dispatch_error(),
     ));
-    t.pass(&m.path_to_ui_test_for_metadata(
+    t.pass(m.path_to_ui_test_for_metadata(
         "array_dispatch_error",
         dispatch_errors::metadata_array_dispatch_error(),
     ));

testing/ui-tests/src/utils/metadata_test_runner.rs

@@ -52,9 +52,9 @@ impl MetadataTestRunner {
 
         std::fs::create_dir_all(&tmp_dir).expect("could not create tmp ui test dir");
         // Write metadata to tmp folder:
-        std::fs::write(&tmp_metadata_path, &encoded_metadata).unwrap();
+        std::fs::write(&tmp_metadata_path, encoded_metadata).unwrap();
         // Write test file to tmp folder (it'll be moved by trybuild):
-        std::fs::write(&tmp_rust_path, &rust_file).unwrap();
+        std::fs::write(&tmp_rust_path, rust_file).unwrap();
 
         tmp_rust_path
     }