Update commands to generate flatbuffer rust code

Signed-off-by: Ludvig Liljenberg <[email protected]>

Author: ludfjig

Justfile

@@ -362,7 +362,7 @@ build-fuzzer fuzz-target:
 ###################
 
 gen-all-fbs-rust-code:
-    for fbs in `find src -name "*.fbs"`; do flatc -r --rust-module-root-file --gen-all -o ./src/hyperlight_common/src/flatbuffers/ $fbs; done
+    flatc --rust --rust-module-root-file --gen-all -o ./src/hyperlight_common/src/flatbuffers/ ./src/schema/all.fbs
     just fmt-apply
 
 install-vcpkg:

docs/how-to-use-flatbuffers.md

@@ -19,9 +19,3 @@ We recommend building `flatc` from source. To generate rust code, use
 ```console
 just gen-all-fbs-rust-code
 ```
-
-### Note about generated code
-
-Because we invoke `flatc` multiple times when generating the Rust code, the `mod.rs` generated in `./src/hyperlight_common/src/flatbuffers` is overwritten multiple times and will likely be incorrect. Make sure to manually inspect and if necessary update this file before continuing with your changes as certain modules might be missing. After fixing `mod.rs`, you might need to re-run `just fmt`, since it might not have applied to all generated files if your `mod.rs` was invalid.
-
->`flatc` does support passing multiple schema files (e.g. it is possible to pass `.\src\schema\*.fbs`), so we could regenerate all the files each time a change was made, however that generates incorrect code (see [here](https://github.com/google/flatbuffers/issues/6800) for details).

src/schema/all.fbs

@@ -0,0 +1,7 @@
+include "function_types.fbs";
+include "function_call_result.fbs";
+include "function_call.fbs";
+include "guest_error.fbs";
+include "guest_log_data.fbs";
+include "host_function_definition.fbs";
+include "host_function_details.fbs";