Update Unreal SDK to websocket 2.0

crates/cli/src/subcommands/generate.rs

@@ -48,6 +48,7 @@ fn build_generate_config_schema(command: &clap::Command) -> Result<CommandSchema
         .key(Key::new("js_file").module_specific())
         .key(Key::new("namespace").generate_entry_specific())
         .key(Key::new("unreal_module_name").generate_entry_specific())
+        .key(Key::new("module_prefix").generate_entry_specific())
         .key(Key::new("build_options").module_specific())
         .key(Key::new("include_private"))
         .exclude("json_module")
@@ -234,6 +235,11 @@ pub fn cli() -> clap::Command {
                 .alias("module-name")
                 .help("The module name that should be used for DLL export macros (required for lang unrealcpp)")
         )
+        .arg(
+            Arg::new("module_prefix")
+                .long("module-prefix")
+                .help("The module prefix to use for generated types (only used with --lang unrealcpp)")
+        )
         .arg(
             Arg::new("lang")
                 .long("lang")
@@ -285,6 +291,7 @@ pub struct GenerateRunConfig {
     pub lang: Language,
     pub namespace: String,
     pub module_name: Option<String>,
+    pub module_prefix: Option<String>,
     pub build_options: String,
     pub out_dir: PathBuf,
     pub include_private: bool,
@@ -313,6 +320,7 @@ fn prepare_generate_run_configs<'a>(
             .get_one::<String>("namespace")?
             .unwrap_or_else(|| "SpacetimeDB.Types".to_string());
         let module_name = command_config.get_one::<String>("unreal_module_name")?;
+        let module_prefix = command_config.get_one::<String>("module_prefix")?;
         let build_options = command_config
             .get_one::<String>("build_options")?
             .unwrap_or_else(String::new);
@@ -371,6 +379,7 @@ fn prepare_generate_run_configs<'a>(
             lang,
             namespace,
             module_name,
+            module_prefix,
             build_options,
             out_dir,
             include_private,
@@ -512,6 +521,7 @@ pub async fn run_prepared_generate_configs(
                 unreal_cpp_lang = UnrealCpp {
                     module_name: run.module_name.as_ref().unwrap(),
                     uproject_dir: &run.out_dir,
+                    module_prefix: run.module_prefix.as_deref().unwrap_or(""),
                 };
                 &unreal_cpp_lang as &dyn Lang
             }

crates/codegen/Cargo.toml

@@ -15,6 +15,7 @@ spacetimedb-schema.workspace = true
 anyhow.workspace = true
 convert_case.workspace = true
 itertools.workspace = true
+serde_json.workspace = true
 
 [dev-dependencies]
 fs-err.workspace = true

crates/codegen/src/UnrealCPP-README.md

@@ -316,7 +316,7 @@ cargo run --bin spacetimedb-cli -- generate --lang unrealcpp --uproject-dir crat
 ### Parameters
 
 - `--lang unrealcpp`: Specifies the UnrealCPP code generator
-- `--uproject-dir`: Directory containing Unreal's .uproject or .uplugin file
+- `--uproject-dir`: Directory containing your Unreal project's `.uproject` file
 - `--module-path`: Path to your SpacetimeDB module source code
 - `--unreal-module-name`: **Required** - Name used for generated classes, API prefix and putting generated module bindings in the correct Module's Source
 
@@ -331,6 +331,15 @@ The `--unreal-module-name` parameter is **mandatory** for UnrealCPP generation b
 
 **⚠️ IMPORTANT:** Without the module name, the generated code would not compile in Unreal Engine due to missing API macros and naming conflicts.
 
+### Project Setup Behavior
+
+When generating into an Unreal project, the code generator also:
+
+1. Ensures the named module exists in the project's `Modules` array in the `.uproject` file.
+2. Creates missing `Source/<Module>/<Module>.Build.cs`, `Source/<Module>/<Module>.cpp`, and `Source/<Module>/<Module>.h` files.
+
+If the `.uproject` file is missing, unreadable, malformed, or has an invalid `Modules` field, generation fails immediately.
+
 ## Implementation Details
 
 The Blueprint compatibility checking is implemented in the `is_blueprintable()` function, which recursively checks:
@@ -344,4 +353,4 @@ All error messages follow a consistent format:
 - **Single type:** `"uint32 types are not Blueprint-compatible"`
 - **Multiple types:** `"uint32, uint64 types are not Blueprint-compatible"`
 
-This makes it clear to developers exactly which types need to be changed for Blueprint compatibility.
+This makes it clear to developers exactly which types need to be changed for Blueprint compatibility.