Implement bp2build converter for rust_protobuf_host

Test: go test
Bug: 295925256
Change-Id: I43b7359da8fc19f4338e2583448b7617194df5e6

1 files changed, 69 insertions, 0 deletions

diff --git a/rust/protobuf.go b/rust/protobuf.go
index a14ebeaab..ae828442b 100644
--- a/rust/protobuf.go
+++ b/rust/protobuf.go
@@ -19,6 +19,9 @@ import (
 	"strings"
 
 	"android/soong/android"
+	"android/soong/bazel"
+
+	"github.com/google/blueprint/proptools"
 )
 
 var (
@@ -264,5 +267,71 @@ func NewRustProtobuf(hod android.HostOrDeviceSupported) (*Module, *protobufDecor
 
 	module := NewSourceProviderModule(hod, protobuf, false, false)
 
+	android.InitBazelModule(module)
+
 	return module, protobuf
 }
+
+type rustProtoAttributes struct {
+	Srcs       bazel.LabelListAttribute
+	Crate_name bazel.StringAttribute
+	Deps       bazel.LabelListAttribute
+}
+
+type protoLibraryAttributes struct {
+	Srcs bazel.LabelListAttribute
+}
+
+func protoLibraryBp2build(ctx android.TopDownMutatorContext, m *Module) {
+	var protoFiles []string
+
+	for _, propsInterface := range m.sourceProvider.SourceProviderProps() {
+		if possibleProps, ok := propsInterface.(*ProtobufProperties); ok {
+			protoFiles = possibleProps.Protos
+			break
+		}
+	}
+
+	protoLibraryName := m.Name() + "_proto"
+
+	protoDeps := bazel.LabelListAttribute{
+		Value: bazel.LabelList{
+			Includes: []bazel.Label{
+				{
+					Label:              ":" + protoLibraryName,
+					OriginalModuleName: m.Name(),
+				},
+			},
+		},
+	}
+
+	ctx.CreateBazelTargetModule(
+		bazel.BazelTargetModuleProperties{
+			Rule_class: "proto_library",
+		},
+		android.CommonAttributes{
+			Name: protoLibraryName,
+		},
+		&protoLibraryAttributes{
+			Srcs: bazel.MakeLabelListAttribute(
+				android.BazelLabelForModuleSrc(ctx, protoFiles),
+			),
+		},
+	)
+
+	ctx.CreateBazelTargetModule(
+		bazel.BazelTargetModuleProperties{
+			Rule_class:        "rust_proto_library",
+			Bzl_load_location: "@rules_rust//proto/protobuf:defs.bzl",
+		},
+		android.CommonAttributes{
+			Name: m.Name(),
+		},
+		&rustProtoAttributes{
+			Crate_name: bazel.StringAttribute{
+				Value: proptools.StringPtr(m.CrateName()),
+			},
+			Deps: protoDeps,
+		},
+	)
+}