Generate one file per XDR type

[leighmcculloch]

What

Change the XDR Rust code generator to output one .rs file per type definition instead of a single generated.rs file.

Why

A single 74k-line generated.rs is unwieldy for navigation, IDE indexing, and incremental compilation. Splitting into per-type files makes it easier to find types, improves compile-time caching when only a subset of types change, and aligns with how hand-written Rust crates organize modules.

There is no issue driving this improvement, however the following changes have really made it easier to make this change now:

• Rewrite code generator in Rust #490
• Remove curr and next and build off xdr main with features #519
• Add #ifdef cfg support to XDR generator #515

[Copilot]

Pull request overview

Updates the build/cleanup wiring to support splitting XDR-generated Rust output into multiple files (instead of a single large generated.rs), improving formatting coverage and cleanup behavior.

Changes:

• Run rustfmt over both the legacy target and the new per-type generated .rs files.
• Extend make clean to remove the generated output directory.

Comments suppressed due to low confidence (1)

Makefile:51

• xdr-json still depends on src/generated.rs, but the PR description says generation is moving away from a single generated.rs file. This dependency should be updated to depend on the new artifact that represents a completed generation step (e.g., a src/generated/mod.rs entrypoint, or a dedicated stamp file like src/generated/.stamp that the generator touches at the end). Otherwise make xdr-json may not rebuild when per-type outputs change, or may fail if src/generated.rs is no longer produced.

xdr-json: src/generated.rs

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.