Incorporate bpf into mixed builds

Bug: 240163393
Test: TestBpfWithBazel in bpf_test.go
Change-Id: I1d24a9c0d1d6911987c730bf1b5b7e02d6e73a5e

bpf/bpf.go

@@ -22,6 +22,7 @@ import (
 
 	"android/soong/android"
 	"android/soong/bazel"
+	"android/soong/bazel/cquery"
 
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/proptools"
@@ -239,6 +240,35 @@ func (bpf *bpf) AndroidMk() android.AndroidMkData {
 	}
 }
 
+var _ android.MixedBuildBuildable = (*bpf)(nil)
+
+func (bpf *bpf) IsMixedBuildSupported(ctx android.BaseModuleContext) bool {
+	return true
+}
+
+func (bpf *bpf) QueueBazelCall(ctx android.BaseModuleContext) {
+	bazelCtx := ctx.Config().BazelContext
+	bazelCtx.QueueBazelRequest(
+		bpf.GetBazelLabel(ctx, bpf),
+		cquery.GetOutputFiles,
+		android.GetConfigKey(ctx))
+}
+
+func (bpf *bpf) ProcessBazelQueryResponse(ctx android.ModuleContext) {
+	bazelCtx := ctx.Config().BazelContext
+	objPaths, err := bazelCtx.GetOutputFiles(bpf.GetBazelLabel(ctx, bpf), android.GetConfigKey(ctx))
+	if err != nil {
+		ctx.ModuleErrorf(err.Error())
+		return
+	}
+
+	bazelOuts := android.Paths{}
+	for _, p := range objPaths {
+		bazelOuts = append(bazelOuts, android.PathForBazelOut(ctx, p))
+	}
+	bpf.objs = bazelOuts
+}
+
 // Implements OutputFileFileProducer interface so that the obj output can be used in the data property
 // of other modules.
 func (bpf *bpf) OutputFiles(tag string) (android.Paths, error) {

bpf/bpf_test.go

@@ -71,3 +71,26 @@ func TestBpfSourceName(t *testing.T) {
 		`\QAndroid.bp:2:3: module "bpf_invalid_name.o" variant "android_common": invalid character '_' in source name\E`)).
 		RunTestWithBp(t, bp)
 }
+
+func TestBpfWithBazel(t *testing.T) {
+	bp := `
+		bpf {
+			name: "bpf.o",
+			srcs: ["bpf.c"],
+			bazel_module: { label: "//bpf" },
+		}
+	`
+
+	result := android.GroupFixturePreparers(
+		prepareForBpfTest, android.FixtureModifyConfig(func(config android.Config) {
+			config.BazelContext = android.MockBazelContext{
+				OutputBaseDir: "outputbase",
+				LabelToOutputFiles: map[string][]string{
+					"//bpf": []string{"bpf.o"}}}
+		})).RunTestWithBp(t, bp)
+
+	output := result.Module("bpf.o", "android_common").(*bpf)
+
+	expectedOutputFiles := []string{"outputbase/execroot/__main__/bpf.o"}
+	android.AssertDeepEquals(t, "output files", expectedOutputFiles, output.objs.Strings())
+}