exclude generated code from rustfmt using attribute

instead of deleting it before running cargo fmt

Author: wfraser

.github/workflows/cargo-test.yml

@@ -19,14 +19,9 @@ jobs:
           rustup component add rustfmt --toolchain nightly
 
       - name: Run rustfmt
-        # Delete the generated code so it doesn't get formatted.
-        # We'll be re-running the generator later, so this is okay.
         run: |
-          rm -rf src/generated
-          echo "// empty module for rustfmt" > src/generated.rs
           echo "// empty module for rustfmt" > tests/generated.rs
           rustup run nightly cargo fmt --check
-          rm src/generated.rs
           rm tests/generated.rs
 
       - name: Set up Python

src/lib.rs

@@ -56,6 +56,7 @@ mod client_helpers;
 pub mod oauth2;
 
 // You need to run the Stone generator to create this module.
+#[rustfmt::skip]
 mod generated;
 pub use generated::*;
 

tests/generated_tests.rs

@@ -1,3 +1,4 @@
 #![warn(rust_2018_idioms)]
 
+#[rustfmt::skip]
 mod generated; // You need to run the Stone generator to create this module.