Add bp2build converter for bpf

Bug: 240163393
Test: m bp2build
Test: bp2build/bpf_conversion_test.go
Change-Id: Ie3bbc64511146b099a766d7e8b56e93cef58ef68

android/allowlists/allowlists.go

@@ -589,6 +589,7 @@ var (
 		"ndk_headers",
 		"ndk_library",
 		"sysprop_library",
+		"bpf",
 	}
 
 	// Add the names of modules that bp2build should never convert, if it is

bp2build/bpf_conversion_test.go

@@ -0,0 +1,65 @@
+// Copyright 2022 Google Inc. All rights reserved.
+//
+// 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 bp2build
+
+import (
+	"android/soong/android"
+	"android/soong/bpf"
+
+	"testing"
+)
+
+func runBpfTestCase(t *testing.T, tc Bp2buildTestCase) {
+	t.Helper()
+	(&tc).ModuleTypeUnderTest = "bpf"
+	(&tc).ModuleTypeUnderTestFactory = bpf.BpfFactory
+	RunBp2BuildTestCase(t, registerBpfModuleTypes, tc)
+}
+
+func registerBpfModuleTypes(ctx android.RegistrationContext) {}
+
+func TestBpfSupportedAttrs(t *testing.T) {
+	runBpfTestCase(t, Bp2buildTestCase{
+		Description: "Bpf module only converts supported attributes",
+		Filesystem:  map[string]string{},
+		Blueprint: `
+bpf {
+    name: "bpfTestOut.o",
+    srcs: ["bpfTestSrcOne.c",
+           "bpfTestSrcTwo.c"],
+    btf: true,
+    cflags: ["-bpfCflagOne",
+             "-bpfCflagTwo"],
+    include_dirs: ["ia/ib/ic"],
+    sub_dir: "sa/ab",
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("bpf", "bpfTestOut.o", AttrNameToString{
+				"absolute_includes": `["ia/ib/ic"]`,
+				"btf":               `True`,
+				"copts": `[
+        "-bpfCflagOne",
+        "-bpfCflagTwo",
+    ]`,
+				"srcs": `[
+        "bpfTestSrcOne.c",
+        "bpfTestSrcTwo.c",
+    ]`,
+				"target_compatible_with": `["//build/bazel/platforms/os:android"]`,
+			}),
+		},
+	})
+}

bpf/bpf.go

@@ -21,6 +21,7 @@ import (
 	"strings"
 
 	"android/soong/android"
+	"android/soong/bazel"
 
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/proptools"
@@ -93,6 +94,7 @@ type BpfProperties struct {
 
 type bpf struct {
 	android.ModuleBase
+	android.BazelModuleBase
 
 	properties BpfProperties
 
@@ -260,5 +262,39 @@ func BpfFactory() android.Module {
 	module.AddProperties(&module.properties)
 
 	android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibCommon)
+	android.InitBazelModule(module)
 	return module
 }
+
+type bazelBpfAttributes struct {
+	Srcs              bazel.LabelListAttribute
+	Copts             bazel.StringListAttribute
+	Absolute_includes bazel.StringListAttribute
+	Btf               *bool
+	// TODO(b/249528391): Add support for sub_dir
+}
+
+// bpf bp2build converter
+func (b *bpf) ConvertWithBp2build(ctx android.TopDownMutatorContext) {
+	if ctx.ModuleType() != "bpf" {
+		return
+	}
+
+	srcs := bazel.MakeLabelListAttribute(android.BazelLabelForModuleSrc(ctx, b.properties.Srcs))
+	copts := bazel.MakeStringListAttribute(b.properties.Cflags)
+	absolute_includes := bazel.MakeStringListAttribute(b.properties.Include_dirs)
+	btf := b.properties.Btf
+
+	attrs := bazelBpfAttributes{
+		Srcs:              srcs,
+		Copts:             copts,
+		Absolute_includes: absolute_includes,
+		Btf:               btf,
+	}
+	props := bazel.BazelTargetModuleProperties{
+		Rule_class:        "bpf",
+		Bzl_load_location: "//build/bazel/rules/bpf:bpf.bzl",
+	}
+
+	ctx.CreateBazelTargetModule(props, android.CommonAttributes{Name: b.Name()}, &attrs)
+}