Enable bp2build for cc modules relying on sysprop

Bug: 244439349
Test: m bp2build
Test: Inspect BUILD.bazel files
Test: Unit tests
Change-Id: I85bfb9fa69cb3f96b15bdbeb797dba86b3349804

cc/Android.bp

@@ -45,6 +45,7 @@ bootstrap_go_package {
         "snapshot_utils.go",
         "stl.go",
         "strip.go",
+        "sysprop.go",
         "tidy.go",
         "util.go",
         "vendor_snapshot.go",

cc/bp2build.go

@@ -28,14 +28,15 @@ import (
 )
 
 const (
-	cSrcPartition     = "c"
-	asSrcPartition    = "as"
-	asmSrcPartition   = "asm"
-	lSrcPartition     = "l"
-	llSrcPartition    = "ll"
-	cppSrcPartition   = "cpp"
-	protoSrcPartition = "proto"
-	aidlSrcPartition  = "aidl"
+	cSrcPartition       = "c"
+	asSrcPartition      = "as"
+	asmSrcPartition     = "asm"
+	lSrcPartition       = "l"
+	llSrcPartition      = "ll"
+	cppSrcPartition     = "cpp"
+	protoSrcPartition   = "proto"
+	aidlSrcPartition    = "aidl"
+	syspropSrcPartition = "sysprop"
 
 	stubsSuffix = "_stub_libs_current"
 )
@@ -104,7 +105,8 @@ func groupSrcsByExtension(ctx android.BazelConversionPathContext, srcs bazel.Lab
 		llSrcPartition: bazel.LabelPartition{Extensions: []string{".ll"}},
 		// C++ is the "catch-all" group, and comprises generated sources because we don't
 		// know the language of these sources until the genrule is executed.
-		cppSrcPartition: bazel.LabelPartition{Extensions: []string{".cpp", ".cc", ".cxx", ".mm"}, LabelMapper: addSuffixForFilegroup("_cpp_srcs"), Keep_remainder: true},
+		cppSrcPartition:     bazel.LabelPartition{Extensions: []string{".cpp", ".cc", ".cxx", ".mm"}, LabelMapper: addSuffixForFilegroup("_cpp_srcs"), Keep_remainder: true},
+		syspropSrcPartition: bazel.LabelPartition{Extensions: []string{".sysprop"}},
 	}
 
 	return bazel.PartitionLabelListAttribute(ctx, &srcs, labels)
@@ -320,6 +322,9 @@ type compilerAttributes struct {
 	llSrcs  bazel.LabelListAttribute
 	lexopts bazel.StringListAttribute
 
+	// Sysprop sources
+	syspropSrcs bazel.LabelListAttribute
+
 	hdrs bazel.LabelListAttribute
 
 	rtti bazel.BoolAttribute
@@ -482,6 +487,7 @@ func (ca *compilerAttributes) finalize(ctx android.BazelConversionPathContext, i
 	ca.asmSrcs = partitionedSrcs[asmSrcPartition]
 	ca.lSrcs = partitionedSrcs[lSrcPartition]
 	ca.llSrcs = partitionedSrcs[llSrcPartition]
+	ca.syspropSrcs = partitionedSrcs[syspropSrcPartition]
 
 	ca.absoluteIncludes.DeduplicateAxesFromBase()
 	ca.localIncludes.DeduplicateAxesFromBase()
@@ -734,6 +740,10 @@ func bp2BuildParseBaseProps(ctx android.Bp2buildMutatorContext, module *Module)
 	(&compilerAttrs).srcs.Add(&convertedLSrcs.srcName)
 	(&compilerAttrs).cSrcs.Add(&convertedLSrcs.cSrcName)
 
+	if !compilerAttrs.syspropSrcs.IsEmpty() {
+		(&linkerAttrs).wholeArchiveDeps.Add(bp2buildCcSysprop(ctx, module.Name(), module.Properties.Min_sdk_version, compilerAttrs.syspropSrcs))
+	}
+
 	features := compilerAttrs.features.Clone().Append(linkerAttrs.features)
 	features.DeduplicateAxesFromBase()
 
@@ -1208,10 +1218,14 @@ func bp2BuildParseExportedIncludes(ctx android.BazelConversionPathContext, modul
 	return exported
 }
 
+func BazelLabelNameForStaticModule(baseLabel string) string {
+	return baseLabel + "_bp2build_cc_library_static"
+}
+
 func bazelLabelForStaticModule(ctx android.BazelConversionPathContext, m blueprint.Module) string {
 	label := android.BazelModuleLabel(ctx, m)
 	if ccModule, ok := m.(*Module); ok && ccModule.typ() == fullLibrary && !android.GetBp2BuildAllowList().GenerateCcLibraryStaticOnly(m.Name()) {
-		label += "_bp2build_cc_library_static"
+		return BazelLabelNameForStaticModule(label)
 	}
 	return label
 }

cc/gen.go

@@ -229,6 +229,34 @@ func genSysprop(ctx android.ModuleContext, syspropFile android.Path) (android.Pa
 	return cppFile, headers.Paths()
 }
 
+func bp2buildCcSysprop(ctx android.Bp2buildMutatorContext, moduleName string, minSdkVersion *string, srcs bazel.LabelListAttribute) *bazel.LabelAttribute {
+	labels := SyspropLibraryLabels{
+		SyspropLibraryLabel: moduleName + "_sysprop_library",
+		StaticLibraryLabel:  moduleName + "_cc_sysprop_library_static",
+	}
+	Bp2buildSysprop(ctx, labels, srcs, minSdkVersion)
+	return createLabelAttributeCorrespondingToSrcs(":"+labels.StaticLibraryLabel, srcs)
+}
+
+// Creates a LabelAttribute for a given label where the value is only set for
+// the same config values that have values in a given LabelListAttribute
+func createLabelAttributeCorrespondingToSrcs(baseLabelName string, srcs bazel.LabelListAttribute) *bazel.LabelAttribute {
+	baseLabel := bazel.Label{Label: baseLabelName}
+	label := bazel.LabelAttribute{}
+	if !srcs.Value.IsNil() && !srcs.Value.IsEmpty() {
+		label.Value = &baseLabel
+		return &label
+	}
+	for axis, configToSrcs := range srcs.ConfigurableValues {
+		for config, val := range configToSrcs {
+			if !val.IsNil() && !val.IsEmpty() {
+				label.SetSelectValue(axis, config, baseLabel)
+			}
+		}
+	}
+	return &label
+}
+
 // Used to communicate information from the genSources method back to the library code that uses
 // it.
 type generatedSourceInfo struct {

cc/sysprop.go

@@ -0,0 +1,71 @@
+// Copyright (C) 2019 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 cc
+
+import (
+	"android/soong/android"
+	"android/soong/bazel"
+)
+
+// TODO(b/240463568): Additional properties will be added for API validation
+type bazelSyspropLibraryAttributes struct {
+	Srcs bazel.LabelListAttribute
+}
+
+type bazelCcSyspropLibraryAttributes struct {
+	Dep             bazel.LabelAttribute
+	Min_sdk_version *string
+}
+
+type SyspropLibraryLabels struct {
+	SyspropLibraryLabel string
+	SharedLibraryLabel  string
+	StaticLibraryLabel  string
+}
+
+func Bp2buildSysprop(ctx android.Bp2buildMutatorContext, labels SyspropLibraryLabels, srcs bazel.LabelListAttribute, minSdkVersion *string) {
+	ctx.CreateBazelTargetModule(
+		bazel.BazelTargetModuleProperties{
+			Rule_class:        "sysprop_library",
+			Bzl_load_location: "//build/bazel/rules/sysprop:sysprop_library.bzl",
+		},
+		android.CommonAttributes{Name: labels.SyspropLibraryLabel},
+		&bazelSyspropLibraryAttributes{
+			Srcs: srcs,
+		})
+
+	attrs := &bazelCcSyspropLibraryAttributes{
+		Dep:             *bazel.MakeLabelAttribute(":" + labels.SyspropLibraryLabel),
+		Min_sdk_version: minSdkVersion,
+	}
+
+	if labels.SharedLibraryLabel != "" {
+		ctx.CreateBazelTargetModule(
+			bazel.BazelTargetModuleProperties{
+				Rule_class:        "cc_sysprop_library_shared",
+				Bzl_load_location: "//build/bazel/rules/cc:cc_sysprop_library.bzl",
+			},
+			android.CommonAttributes{Name: labels.SharedLibraryLabel},
+			attrs)
+	}
+
+	ctx.CreateBazelTargetModule(
+		bazel.BazelTargetModuleProperties{
+			Rule_class:        "cc_sysprop_library_static",
+			Bzl_load_location: "//build/bazel/rules/cc:cc_sysprop_library.bzl",
+		},
+		android.CommonAttributes{Name: labels.StaticLibraryLabel},
+		attrs)
+}