bp2build: cc_object converter.
This CL introduces a basic bp2build converter for cc_object modules.
cc_objects maps cleanly to cc_library targets, but with -fnoaddrsig.
This CL also demonstrates generating include deps within a macro to
allow the cc_object compilation to depend on a relative-include header
within an include dir.
e.g. if "foo.cc" includes "android/log.h" and the latter is located at
"include/android/log.h", the autogenerated header deps would export
"android/log.h" correctly to the foo.cc upstream target.
Test: GENERATE_BAZEL_FILES=true m nothing && bp2build-sync write && bazel build //bionic/libc:crtbegin_so1
Change-Id: Ifd9e097051ec184ab0a1929d07918f0ff4f24d98
diff --git a/bp2build/cc_object_conversion_test.go b/bp2build/cc_object_conversion_test.go
new file mode 100644
index 0000000..e4ffe16
--- /dev/null
+++ b/bp2build/cc_object_conversion_test.go
@@ -0,0 +1,186 @@
+// Copyright 2021 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/cc"
+ "fmt"
+ "strings"
+ "testing"
+)
+
+func TestCcObjectBp2Build(t *testing.T) {
+ testCases := []struct {
+ description string
+ moduleTypeUnderTest string
+ moduleTypeUnderTestFactory android.ModuleFactory
+ moduleTypeUnderTestBp2BuildMutator func(android.TopDownMutatorContext)
+ blueprint string
+ expectedBazelTargets []string
+ filesystem map[string]string
+ }{
+ {
+ description: "simple cc_object generates cc_object with include header dep",
+ moduleTypeUnderTest: "cc_object",
+ moduleTypeUnderTestFactory: cc.ObjectFactory,
+ moduleTypeUnderTestBp2BuildMutator: cc.ObjectBp2Build,
+ filesystem: map[string]string{
+ "a/b/foo.h": "",
+ "a/b/bar.h": "",
+ "a/b/c.c": "",
+ },
+ blueprint: `cc_object {
+ name: "foo",
+ local_include_dirs: ["include"],
+ cflags: [
+ "-Wno-gcc-compat",
+ "-Wall",
+ "-Werror",
+ ],
+ srcs: [
+ "a/b/*.h",
+ "a/b/c.c"
+ ],
+
+ bazel_module: { bp2build_available: true },
+}
+`,
+ expectedBazelTargets: []string{`cc_object(
+ name = "foo",
+ copts = [
+ "-fno-addrsig",
+ "-Wno-gcc-compat",
+ "-Wall",
+ "-Werror",
+ ],
+ local_include_dirs = [
+ "include",
+ ],
+ srcs = [
+ "a/b/bar.h",
+ "a/b/foo.h",
+ "a/b/c.c",
+ ],
+)`,
+ },
+ },
+ {
+ description: "simple cc_object with defaults",
+ moduleTypeUnderTest: "cc_object",
+ moduleTypeUnderTestFactory: cc.ObjectFactory,
+ moduleTypeUnderTestBp2BuildMutator: cc.ObjectBp2Build,
+ blueprint: `cc_object {
+ name: "foo",
+ local_include_dirs: ["include"],
+ srcs: [
+ "a/b/*.h",
+ "a/b/c.c"
+ ],
+
+ defaults: ["foo_defaults"],
+ bazel_module: { bp2build_available: true },
+}
+
+cc_defaults {
+ name: "foo_defaults",
+ defaults: ["foo_bar_defaults"],
+ // TODO(b/178130668): handle configurable attributes that depend on the platform
+ arch: {
+ x86: {
+ cflags: ["-fPIC"],
+ },
+ x86_64: {
+ cflags: ["-fPIC"],
+ },
+ },
+}
+
+cc_defaults {
+ name: "foo_bar_defaults",
+ cflags: [
+ "-Wno-gcc-compat",
+ "-Wall",
+ "-Werror",
+ ],
+}
+`,
+ expectedBazelTargets: []string{`cc_object(
+ name = "foo",
+ copts = [
+ "-Wno-gcc-compat",
+ "-Wall",
+ "-Werror",
+ "-fno-addrsig",
+ ],
+ local_include_dirs = [
+ "include",
+ ],
+ srcs = [
+ "a/b/c.c",
+ ],
+)`,
+ },
+ },
+ }
+
+ dir := "."
+ for _, testCase := range testCases {
+ filesystem := make(map[string][]byte)
+ toParse := []string{
+ "Android.bp",
+ }
+ for f, content := range testCase.filesystem {
+ if strings.HasSuffix(f, "Android.bp") {
+ toParse = append(toParse, f)
+ }
+ filesystem[f] = []byte(content)
+ }
+ config := android.TestConfig(buildDir, nil, testCase.blueprint, filesystem)
+ ctx := android.NewTestContext(config)
+ // Always register cc_defaults module factory
+ ctx.RegisterModuleType("cc_defaults", func() android.Module { return cc.DefaultsFactory() })
+
+ ctx.RegisterModuleType(testCase.moduleTypeUnderTest, testCase.moduleTypeUnderTestFactory)
+ ctx.RegisterBp2BuildMutator(testCase.moduleTypeUnderTest, testCase.moduleTypeUnderTestBp2BuildMutator)
+ ctx.RegisterForBazelConversion()
+
+ _, errs := ctx.ParseFileList(dir, toParse)
+ if Errored(t, testCase.description, errs) {
+ continue
+ }
+ _, errs = ctx.ResolveDependencies(config)
+ if Errored(t, testCase.description, errs) {
+ continue
+ }
+
+ bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[dir]
+ if actualCount, expectedCount := len(bazelTargets), len(testCase.expectedBazelTargets); actualCount != expectedCount {
+ fmt.Println(bazelTargets)
+ t.Errorf("%s: Expected %d bazel target, got %d", testCase.description, expectedCount, actualCount)
+ } else {
+ for i, target := range bazelTargets {
+ if w, g := testCase.expectedBazelTargets[i], target.content; w != g {
+ t.Errorf(
+ "%s: Expected generated Bazel target to be '%s', got '%s'",
+ testCase.description,
+ w,
+ g,
+ )
+ }
+ }
+ }
+ }
+}