Add sub-module mounts support + codegen

Author: aasoni

crates/bindings-cpp/include/spacetimedb/internal/autogen/RawModuleDef.g.h

@@ -12,9 +12,9 @@
 #include <memory>
 #include "../autogen_base.h"
 #include "spacetimedb/bsatn/bsatn.h"
+#include "RawModuleDefV10.g.h"
 #include "RawModuleDefV8.g.h"
 #include "RawModuleDefV9.g.h"
-#include "RawModuleDefV10.g.h"
 
 namespace SpacetimeDB::Internal {
 

crates/bindings-cpp/include/spacetimedb/internal/autogen/RawModuleDefV10Section.g.h

@@ -25,8 +25,9 @@
 #include "RawTableDefV10.g.h"
 #include "RawRowLevelSecurityDefV9.g.h"
 #include "RawHttpRouteDefV10.g.h"
+#include "RawModuleMountV10.g.h"
 
 namespace SpacetimeDB::Internal {
 
-SPACETIMEDB_INTERNAL_TAGGED_ENUM(RawModuleDefV10Section, SpacetimeDB::Internal::Typespace, std::vector<SpacetimeDB::Internal::RawTypeDefV10>, std::vector<SpacetimeDB::Internal::RawTableDefV10>, std::vector<SpacetimeDB::Internal::RawReducerDefV10>, std::vector<SpacetimeDB::Internal::RawProcedureDefV10>, std::vector<SpacetimeDB::Internal::RawViewDefV10>, std::vector<SpacetimeDB::Internal::RawScheduleDefV10>, std::vector<SpacetimeDB::Internal::RawLifeCycleReducerDefV10>, std::vector<SpacetimeDB::Internal::RawRowLevelSecurityDefV9>, SpacetimeDB::Internal::CaseConversionPolicy, SpacetimeDB::Internal::ExplicitNames, std::vector<SpacetimeDB::Internal::RawHttpHandlerDefV10>, std::vector<SpacetimeDB::Internal::RawHttpRouteDefV10>)
+SPACETIMEDB_INTERNAL_TAGGED_ENUM(RawModuleDefV10Section, SpacetimeDB::Internal::Typespace, std::vector<SpacetimeDB::Internal::RawTypeDefV10>, std::vector<SpacetimeDB::Internal::RawTableDefV10>, std::vector<SpacetimeDB::Internal::RawReducerDefV10>, std::vector<SpacetimeDB::Internal::RawProcedureDefV10>, std::vector<SpacetimeDB::Internal::RawViewDefV10>, std::vector<SpacetimeDB::Internal::RawScheduleDefV10>, std::vector<SpacetimeDB::Internal::RawLifeCycleReducerDefV10>, std::vector<SpacetimeDB::Internal::RawRowLevelSecurityDefV9>, SpacetimeDB::Internal::CaseConversionPolicy, SpacetimeDB::Internal::ExplicitNames, std::vector<SpacetimeDB::Internal::RawHttpHandlerDefV10>, std::vector<SpacetimeDB::Internal::RawHttpRouteDefV10>, std::vector<SpacetimeDB::Internal::RawModuleMountV10>)
 } // namespace SpacetimeDB::Internal

crates/bindings-cpp/include/spacetimedb/internal/autogen/RawModuleMountV10.g.h

@@ -0,0 +1,37 @@
+// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+// This was generated using spacetimedb codegen.
+
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+#include <optional>
+#include <memory>
+#include "../autogen_base.h"
+#include "spacetimedb/bsatn/bsatn.h"
+
+// Forward declaration breaks the circular include chain:
+// RawModuleMountV10 -> RawModuleDefV10 -> RawModuleDefV10Section -> RawModuleMountV10
+namespace SpacetimeDB::Internal { struct RawModuleDefV10; }
+
+namespace SpacetimeDB::Internal {
+
+SPACETIMEDB_INTERNAL_PRODUCT_TYPE(RawModuleMountV10) {
+    std::string namespace_;                                          // renamed: 'namespace' is a C++ keyword
+    std::shared_ptr<SpacetimeDB::Internal::RawModuleDefV10> module; // shared_ptr breaks infinite-size recursion
+
+    void bsatn_serialize(::SpacetimeDB::bsatn::Writer& writer) const {
+        ::SpacetimeDB::bsatn::serialize(writer, namespace_);
+        if (module) ::SpacetimeDB::bsatn::serialize(writer, *module);
+    }
+    bool operator==(const RawModuleMountV10& o) const noexcept {
+        if (namespace_ != o.namespace_) return false;
+        if (module && o.module) return *module == *o.module;
+        return !module && !o.module;
+    }
+    bool operator!=(const RawModuleMountV10& o) const noexcept { return !(*this == o); }
+};
+} // namespace SpacetimeDB::Internal

crates/bindings-cpp/include/spacetimedb/internal/autogen/RawReducerDefV9.g.h

@@ -12,8 +12,8 @@
 #include <memory>
 #include "../autogen_base.h"
 #include "spacetimedb/bsatn/bsatn.h"
-#include "Lifecycle.g.h"
 #include "ProductType.g.h"
+#include "Lifecycle.g.h"
 
 namespace SpacetimeDB::Internal {
 

crates/bindings-csharp/Runtime/Internal/Autogen/RawModuleDefV10Section.g.cs

@@ -7,10 +7,22 @@ import {
 } from './algebraic_type';
 import type {
   CaseConversionPolicy,
+  ExplicitNames,
+  RawHttpHandlerDefV10,
+  RawHttpRouteDefV10,
+  RawLifeCycleReducerDefV10,
+  RawModuleMountV10,
   RawModuleDefV10,
   RawModuleDefV10Section,
+  RawProcedureDefV10,
+  RawReducerDefV10,
+  RawRowLevelSecurityDefV9,
+  RawScheduleDefV10,
   RawScopedTypeNameV10,
   RawTableDefV10,
+  RawTypeDefV10,
+  RawViewDefV10,
+  Typespace,
 } from './autogen/types';
 import type { UntypedIndex } from './indexes';
 import type { UntypedTableDef } from './table';
@@ -42,6 +54,7 @@ export type TableNamesOf<S extends UntypedSchemaDef> = Values<
  */
 export type UntypedSchemaDef = {
   tables: Record<string, UntypedTableDef>;
+  namespaces?: Record<string, UntypedSchemaDef>;
 };
 
 /**
@@ -174,7 +187,20 @@ type CompoundTypeCache = Map<
 >;
 
 export type ModuleDef = {
-  [S in RawModuleDefV10Section as Uncapitalize<S['tag']>]: S['value'];
+  typespace: Typespace;
+  types: RawTypeDefV10[];
+  tables: RawTableDefV10[];
+  reducers: RawReducerDefV10[];
+  procedures: RawProcedureDefV10[];
+  views: RawViewDefV10[];
+  schedules: RawScheduleDefV10[];
+  lifeCycleReducers: RawLifeCycleReducerDefV10[];
+  httpHandlers: RawHttpHandlerDefV10[];
+  httpRoutes: RawHttpRouteDefV10[];
+  rowLevelSecurity: RawRowLevelSecurityDefV9[];
+  caseConversionPolicy: CaseConversionPolicy;
+  explicitNames: ExplicitNames;
+  mounts: RawModuleMountV10[];
 };
 
 type Section = RawModuleDefV10Section;
@@ -201,6 +227,7 @@ export class ModuleContext {
     explicitNames: {
       entries: [],
     },
+    mounts: [],
   };
 
   get moduleDef(): ModuleDef {
@@ -259,9 +286,19 @@ export class ModuleContext {
         value: module.caseConversionPolicy,
       }
     );
+    push(
+      module.mounts && {
+        tag: 'Mounts',
+        value: module.mounts,
+      }
+    );
     return { sections };
   }
 
+  addMount(mount: RawModuleMountV10) {
+    this.#moduleDef.mounts.push(mount);
+  }
+
   /**
    * Set the case conversion policy for this module.
    * Called by the settings mechanism.

crates/bindings-csharp/Runtime/Internal/Autogen/RawModuleMountV10.g.cs

@@ -231,6 +231,53 @@ impl<'opts> Cpp<'opts> {
         writeln!(output, "}};").unwrap();
     }
 
+    fn generate_raw_module_mount_v10_special(&self) -> String {
+        // RawModuleMountV10 is special for two reasons:
+        // 1. Its `namespace` field is a C++ keyword, renamed to `namespace_`.
+        // 2. It contains `RawModuleDefV10` which creates a circular include chain:
+        //    RawModuleMountV10 → RawModuleDefV10 → RawModuleDefV10Section → RawModuleMountV10
+        //    We break this with a forward declaration and shared_ptr (which only needs a declaration).
+        r#"// THIS FILE IS AUTOMATICALLY GENERATED BY SPACETIMEDB. EDITS TO THIS FILE
+// WILL NOT BE SAVED. MODIFY TABLES IN YOUR MODULE SOURCE CODE INSTEAD.
+
+// This was generated using spacetimedb codegen.
+
+#pragma once
+
+#include <cstdint>
+#include <string>
+#include <vector>
+#include <optional>
+#include <memory>
+#include "../autogen_base.h"
+#include "spacetimedb/bsatn/bsatn.h"
+
+// Forward declaration breaks the circular include chain:
+// RawModuleMountV10 -> RawModuleDefV10 -> RawModuleDefV10Section -> RawModuleMountV10
+namespace SpacetimeDB::Internal { struct RawModuleDefV10; }
+
+namespace SpacetimeDB::Internal {
+
+SPACETIMEDB_INTERNAL_PRODUCT_TYPE(RawModuleMountV10) {
+    std::string namespace_;                                          // renamed: 'namespace' is a C++ keyword
+    std::shared_ptr<SpacetimeDB::Internal::RawModuleDefV10> module; // shared_ptr breaks infinite-size recursion
+
+    void bsatn_serialize(::SpacetimeDB::bsatn::Writer& writer) const {
+        ::SpacetimeDB::bsatn::serialize(writer, namespace_);
+        if (module) ::SpacetimeDB::bsatn::serialize(writer, *module);
+    }
+    bool operator==(const RawModuleMountV10& o) const noexcept {
+        if (namespace_ != o.namespace_) return false;
+        if (module && o.module) return *module == *o.module;
+        return !module && !o.module;
+    }
+    bool operator!=(const RawModuleMountV10& o) const noexcept { return !(*this == o); }
+};
+} // namespace SpacetimeDB::Internal
+"#
+        .to_string()
+    }
+
     // Generate minimal sum type (TaggedEnum only)
     fn write_sum_type(&self, output: &mut String, module: &ModuleDef, type_name: &str, sum: &SumTypeDef) {
         // Special case: Generate proper tagged enum for RawIndexAlgorithm with data variants
@@ -529,6 +576,17 @@ impl Lang for Cpp<'_> {
             }];
         }
 
+        // Special handling for RawModuleMountV10:
+        // (1) its `namespace` field is a C++ keyword; (2) its `module` field creates a
+        // circular include chain through RawModuleDefV10 → RawModuleDefV10Section.
+        // We break both with a forward declaration and shared_ptr.
+        if name.to_string() == "RawModuleMountV10" {
+            return vec![OutputFile {
+                filename: format!("{name}.g.h"),
+                code: self.generate_raw_module_mount_v10_special(),
+            }];
+        }
+
         self.write_standard_includes(&mut output);
 
         // Add includes for dependencies