1 files changed, 96 insertions, 0 deletions
diff --git a/rust/toolchain_object.go b/rust/toolchain_object.go
new file mode 100644
index 000000000..ac16483a1
--- /dev/null
+++ b/rust/toolchain_object.go
@@ -0,0 +1,96 @@
+//
+// Copyright (C) 2025 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package rust
+
+import (
+	"android/soong/android"
+)
+
+// This module is used to compile the rust toolchain objects
+// When RUST_PREBUILTS_VERSION is set, the object will generated
+// from the given Rust version.
+func init() {
+	android.RegisterModuleType("rust_toolchain_object",
+		rustToolchainObjectFactory)
+	android.RegisterModuleType("rust_toolchain_object_host",
+		rustToolchainObjectHostFactory)
+}
+
+type toolchainObjectProperties struct {
+	// path to the toolchain object crate root, relative to the top of the toolchain source
+	Toolchain_crate_root *string `android:"arch_variant"`
+	// path to the rest of the toolchain srcs, relative to the top of the toolchain source
+	Toolchain_srcs []string `android:"arch_variant"`
+}
+
+type toolchainObjectDecorator struct {
+	*objectDecorator
+	Properties toolchainObjectProperties
+}
+
+// toolchainCrateRoot implements toolchainCompiler.
+func (t *toolchainObjectDecorator) toolchainCrateRoot() *string {
+	return t.Properties.Toolchain_crate_root
+}
+
+// toolchainSrcs implements toolchainCompiler.
+func (t *toolchainObjectDecorator) toolchainSrcs() []string {
+	return t.Properties.Toolchain_srcs
+}
+
+// rust_toolchain_library produces all rust variants.
+func rustToolchainObjectFactory() android.Module {
+	module, object := NewRustObject(android.HostAndDeviceSupported)
+	return initToolchainObject(module, object)
+}
+
+// rust_toolchain_library produces all rust variants.
+func rustToolchainObjectHostFactory() android.Module {
+	module, object := NewRustObject(android.HostSupported)
+	return initToolchainObject(module, object)
+}
+
+func initToolchainObject(module *Module, object *objectDecorator) android.Module {
+	toolchainObject := &toolchainObjectDecorator{
+		objectDecorator: object,
+	}
+	module.compiler = toolchainObject
+	module.AddProperties(&toolchainObject.Properties)
+
+	android.AddLoadHook(module, rustSetToolchainSource)
+
+	return module.Init()
+}
+
+func (t *toolchainObjectDecorator) compilerProps() []interface{} {
+	return append(t.objectDecorator.compilerProps(), &t.Properties)
+}
+
+func (t *toolchainObjectDecorator) crt() bool {
+	return t.objectDecorator.crt()
+}
+
+func (t *toolchainObjectDecorator) install(ctx ModuleContext) {
+	// Objects aren't installable, so do nothing.
+}
+
+func (t *toolchainObjectDecorator) everInstallable() bool {
+	// Objects aren't installable.
+	return false
+}
+
+var _ toolchainCompiler = (*toolchainObjectDecorator)(nil)