bp2build: arch-configurable selects for label list attrs.

This CL adds the configurable LabelListAttribute support to bp2build.

Test: go test
Change-Id: I2ef9e385d9cf1b1845988128eca1d8cda1ecb5e8
diff --git a/cc/library.go b/cc/library.go
index 9bec974..28e4f61 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -2029,7 +2029,7 @@
 	return outputFile
 }
 
-func Bp2BuildParseHeaderLibs(ctx android.TopDownMutatorContext, module *Module) bazel.LabelList {
+func Bp2BuildParseHeaderLibs(ctx android.TopDownMutatorContext, module *Module) bazel.LabelListAttribute {
 	var headerLibs []string
 	for _, linkerProps := range module.linker.linkerProps() {
 		if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
@@ -2038,12 +2038,11 @@
 			break
 		}
 	}
-
-	headerLibsLabels := android.BazelLabelForModuleDeps(ctx, headerLibs)
+	headerLibsLabels := bazel.MakeLabelListAttribute(android.BazelLabelForModuleDeps(ctx, headerLibs))
 	return headerLibsLabels
 }
 
-func Bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) (bazel.LabelList, bazel.LabelList) {
+func Bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) (bazel.LabelListAttribute, bazel.LabelListAttribute) {
 	libraryDecorator := module.linker.(*libraryDecorator)
 
 	includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
@@ -2059,17 +2058,16 @@
 	}
 
 	headersLabels := android.BazelLabelForModuleSrc(ctx, includeDirGlobs)
-
-	return includeDirsLabels, headersLabels
+	return bazel.MakeLabelListAttribute(includeDirsLabels), bazel.MakeLabelListAttribute(headersLabels)
 }
 
 type bazelCcLibraryStaticAttributes struct {
 	Copts      []string
-	Srcs       bazel.LabelList
-	Deps       bazel.LabelList
+	Srcs       bazel.LabelListAttribute
+	Deps       bazel.LabelListAttribute
 	Linkstatic bool
-	Includes   bazel.LabelList
-	Hdrs       bazel.LabelList
+	Includes   bazel.LabelListAttribute
+	Hdrs       bazel.LabelListAttribute
 }
 
 type bazelCcLibraryStatic struct {
@@ -2110,7 +2108,7 @@
 			break
 		}
 	}
-	srcsLabels := android.BazelLabelForModuleSrc(ctx, srcs)
+	srcsLabels := bazel.MakeLabelListAttribute(android.BazelLabelForModuleSrc(ctx, srcs))
 
 	var staticLibs []string
 	var wholeStaticLibs []string
@@ -2135,18 +2133,18 @@
 	includesLabels := android.BazelLabelForModuleSrc(ctx, allIncludes)
 
 	exportedIncludesLabels, exportedIncludesHeadersLabels := Bp2BuildParseExportedIncludes(ctx, module)
-	includesLabels.Append(exportedIncludesLabels)
+	includesLabels.Append(exportedIncludesLabels.Value)
 
 	headerLibsLabels := Bp2BuildParseHeaderLibs(ctx, module)
-	depsLabels.Append(headerLibsLabels)
+	depsLabels.Append(headerLibsLabels.Value)
 
 	attrs := &bazelCcLibraryStaticAttributes{
 		Copts:      copts,
-		Srcs:       bazel.UniqueBazelLabelList(srcsLabels),
-		Deps:       bazel.UniqueBazelLabelList(depsLabels),
+		Srcs:       srcsLabels,
+		Deps:       bazel.MakeLabelListAttribute(depsLabels),
 		Linkstatic: true,
-		Includes:   bazel.UniqueBazelLabelList(includesLabels),
-		Hdrs:       bazel.UniqueBazelLabelList(exportedIncludesHeadersLabels),
+		Includes:   bazel.MakeLabelListAttribute(includesLabels),
+		Hdrs:       exportedIncludesHeadersLabels,
 	}
 
 	props := bazel.BazelTargetModuleProperties{
diff --git a/cc/library_headers.go b/cc/library_headers.go
index 719d538..8286848 100644
--- a/cc/library_headers.go
+++ b/cc/library_headers.go
@@ -62,9 +62,9 @@
 }
 
 type bazelCcLibraryHeadersAttributes struct {
-	Hdrs     bazel.LabelList
-	Includes bazel.LabelList
-	Deps     bazel.LabelList
+	Hdrs     bazel.LabelListAttribute
+	Includes bazel.LabelListAttribute
+	Deps     bazel.LabelListAttribute
 }
 
 type bazelCcLibraryHeaders struct {
diff --git a/cc/object.go b/cc/object.go
index 664be8d..abc3e83 100644
--- a/cc/object.go
+++ b/cc/object.go
@@ -103,8 +103,8 @@
 
 // For bp2build conversion.
 type bazelObjectAttributes struct {
-	Srcs               bazel.LabelList
-	Deps               bazel.LabelList
+	Srcs               bazel.LabelListAttribute
+	Deps               bazel.LabelListAttribute
 	Copts              bazel.StringListAttribute
 	Local_include_dirs []string
 }
@@ -147,14 +147,16 @@
 
 	// Set arch-specific configurable attributes
 	var copts bazel.StringListAttribute
-	var srcs []string
-	var excludeSrcs []string
+	var srcs bazel.LabelListAttribute
 	var localIncludeDirs []string
 	for _, props := range m.compiler.compilerProps() {
 		if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
 			copts.Value = baseCompilerProps.Cflags
-			srcs = baseCompilerProps.Srcs
-			excludeSrcs = baseCompilerProps.Exclude_srcs
+			srcs = bazel.MakeLabelListAttribute(
+				android.BazelLabelForModuleSrcExcludes(
+					ctx,
+					baseCompilerProps.Srcs,
+					baseCompilerProps.Exclude_srcs))
 			localIncludeDirs = baseCompilerProps.Local_include_dirs
 			break
 		}
@@ -164,22 +166,23 @@
 		localIncludeDirs = append(localIncludeDirs, ".")
 	}
 
-	var deps bazel.LabelList
+	var deps bazel.LabelListAttribute
 	for _, props := range m.linker.linkerProps() {
 		if objectLinkerProps, ok := props.(*ObjectLinkerProperties); ok {
-			deps = android.BazelLabelForModuleDeps(ctx, objectLinkerProps.Objs)
+			deps = bazel.MakeLabelListAttribute(
+				android.BazelLabelForModuleDeps(ctx, objectLinkerProps.Objs))
 		}
 	}
 
 	for arch, p := range m.GetArchProperties(&BaseCompilerProperties{}) {
 		if cProps, ok := p.(*BaseCompilerProperties); ok {
+			srcs.SetValueForArch(arch.Name, android.BazelLabelForModuleSrcExcludes(ctx, cProps.Srcs, cProps.Exclude_srcs))
 			copts.SetValueForArch(arch.Name, cProps.Cflags)
 		}
 	}
-	copts.SetValueForArch("default", []string{})
 
 	attrs := &bazelObjectAttributes{
-		Srcs:               android.BazelLabelForModuleSrcExcludes(ctx, srcs, excludeSrcs),
+		Srcs:               srcs,
 		Deps:               deps,
 		Copts:              copts,
 		Local_include_dirs: localIncludeDirs,