cc/bp2build.go - SHIFTPHONES/android_build_soong - Gitiles

 // 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 cc

 import (
 	"android/soong/android"
 	"android/soong/bazel"
 	"path/filepath"
 )

 // bp2build functions and helpers for converting cc_* modules to Bazel.

 func init() {
 	android.DepsBp2BuildMutators(RegisterDepsBp2Build)
 }

 func RegisterDepsBp2Build(ctx android.RegisterMutatorsContext) {
 	ctx.BottomUp("cc_bp2build_deps", depsBp2BuildMutator)
 }

 // A naive deps mutator to add deps on all modules across all combinations of
 // target props for cc modules. This is needed to make module -> bazel label
 // resolution work in the bp2build mutator later. This is probably
 // the wrong way to do it, but it works.
 //
 // TODO(jingwen): can we create a custom os mutator in depsBp2BuildMutator to do this?
 func depsBp2BuildMutator(ctx android.BottomUpMutatorContext) {
 	module, ok := ctx.Module().(*Module)
 	if !ok {
 		// Not a cc module
 		return
 	}

 	if !module.ConvertWithBp2build(ctx) {
 		return
 	}

 	var allDeps []string

 	for _, p := range module.GetTargetProperties(&BaseLinkerProperties{}) {
 		// arch specific linker props
 		if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
 			allDeps = append(allDeps, baseLinkerProps.Header_libs...)
 			allDeps = append(allDeps, baseLinkerProps.Export_header_lib_headers...)
 			allDeps = append(allDeps, baseLinkerProps.Static_libs...)
 			allDeps = append(allDeps, baseLinkerProps.Whole_static_libs...)
 		}
 	}

 	for _, p := range module.GetArchProperties(&BaseLinkerProperties{}) {
 		// arch specific linker props
 		if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
 			allDeps = append(allDeps, baseLinkerProps.Header_libs...)
 			allDeps = append(allDeps, baseLinkerProps.Export_header_lib_headers...)
 			allDeps = append(allDeps, baseLinkerProps.Static_libs...)
 			allDeps = append(allDeps, baseLinkerProps.Whole_static_libs...)
 		}
 	}

 	// Deps in the static: { .. } and shared: { .. } props of a cc_library.
 	if lib, ok := module.compiler.(*libraryDecorator); ok {
 		allDeps = append(allDeps, lib.SharedProperties.Shared.Static_libs...)
 		allDeps = append(allDeps, lib.SharedProperties.Shared.Whole_static_libs...)
 		allDeps = append(allDeps, lib.SharedProperties.Shared.Shared_libs...)
 		allDeps = append(allDeps, lib.SharedProperties.Shared.System_shared_libs...)

 		allDeps = append(allDeps, lib.StaticProperties.Static.Static_libs...)
 		allDeps = append(allDeps, lib.StaticProperties.Static.Whole_static_libs...)
 		allDeps = append(allDeps, lib.StaticProperties.Static.Shared_libs...)
 		allDeps = append(allDeps, lib.StaticProperties.Static.System_shared_libs...)
 	}

 	ctx.AddDependency(module, nil, android.SortedUniqueStrings(allDeps)...)
 }

 type sharedAttributes struct {
 	staticDeps bazel.LabelListAttribute
 }

 // bp2buildParseSharedProps returns the attributes for the shared variant of a cc_library.
 func bp2BuildParseSharedProps(ctx android.TopDownMutatorContext, module *Module) sharedAttributes {
 	lib, ok := module.compiler.(*libraryDecorator)
 	if !ok {
 		return sharedAttributes{}
 	}

 	var staticDeps bazel.LabelListAttribute

 	staticDeps.Value = android.BazelLabelForModuleDeps(ctx, lib.SharedProperties.Shared.Whole_static_libs)

 	return sharedAttributes{
 		staticDeps: staticDeps,
 	}
 }

 type staticAttributes struct {
 	srcs bazel.LabelListAttribute
 }

 // bp2buildParseStaticProps returns the attributes for the static variant of a cc_library.
 func bp2BuildParseStaticProps(ctx android.TopDownMutatorContext, module *Module) staticAttributes {
 	lib, ok := module.compiler.(*libraryDecorator)
 	if !ok {
 		return staticAttributes{}
 	}

 	var srcs bazel.LabelListAttribute
 	srcs.Value = android.BazelLabelForModuleSrc(ctx, lib.StaticProperties.Static.Srcs)

 	return staticAttributes{
 		srcs: srcs,
 	}
 }

 // Convenience struct to hold all attributes parsed from compiler properties.
 type compilerAttributes struct {
 	copts    bazel.StringListAttribute
 	srcs     bazel.LabelListAttribute
 	includes bazel.StringListAttribute
 }

 // bp2BuildParseCompilerProps returns copts, srcs and hdrs and other attributes.
 func bp2BuildParseCompilerProps(ctx android.TopDownMutatorContext, module *Module) compilerAttributes {
 	var srcs bazel.LabelListAttribute
 	var copts bazel.StringListAttribute

 	// Creates the -I flag for a directory, while making the directory relative
 	// to the exec root for Bazel to work.
 	includeFlag := func(dir string) string {
 		// filepath.Join canonicalizes the path, i.e. it takes care of . or .. elements.
 		return "-I" + filepath.Join(ctx.ModuleDir(), dir)
 	}

 	// Parse the list of module-relative include directories (-I).
 	parseLocalIncludeDirs := func(baseCompilerProps *BaseCompilerProperties) []string {
 		// include_dirs are root-relative, not module-relative.
 		includeDirs := bp2BuildMakePathsRelativeToModule(ctx, baseCompilerProps.Include_dirs)
 		return append(includeDirs, baseCompilerProps.Local_include_dirs...)
 	}

 	// Parse the list of copts.
 	parseCopts := func(baseCompilerProps *BaseCompilerProperties) []string {
 		copts := append([]string{}, baseCompilerProps.Cflags...)
 		for _, dir := range parseLocalIncludeDirs(baseCompilerProps) {
 			copts = append(copts, includeFlag(dir))
 		}
 		return copts
 	}

 	// baseSrcs contain the list of src files that are used for every configuration.
 	var baseSrcs []string
 	// baseExcludeSrcs contain the list of src files that are excluded for every configuration.
 	var baseExcludeSrcs []string
 	// baseSrcsLabelList is a clone of the base srcs LabelList, used for computing the
 	// arch or os specific srcs later.
 	var baseSrcsLabelList bazel.LabelList

 	// Parse srcs from an arch or OS's props value, taking the base srcs and
 	// exclude srcs into account.
 	parseSrcs := func(baseCompilerProps *BaseCompilerProperties) bazel.LabelList {
 		// Combine the base srcs and arch-specific srcs
 		allSrcs := append(baseSrcs, baseCompilerProps.Srcs...)
 		// Combine the base exclude_srcs and configuration-specific exclude_srcs
 		allExcludeSrcs := append(baseExcludeSrcs, baseCompilerProps.Exclude_srcs...)
 		return android.BazelLabelForModuleSrcExcludes(ctx, allSrcs, allExcludeSrcs)
 	}

 	for _, props := range module.compiler.compilerProps() {
 		if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
 			srcs.Value = parseSrcs(baseCompilerProps)
 			copts.Value = parseCopts(baseCompilerProps)

 			// Used for arch-specific srcs later.
 			baseSrcs = baseCompilerProps.Srcs
 			baseExcludeSrcs = baseCompilerProps.Exclude_srcs
 			baseSrcsLabelList = parseSrcs(baseCompilerProps)
 			break
 		}
 	}

 	// Handle include_build_directory prop. If the property is true, then the
 	// target has access to all headers recursively in the package, and has
 	// "-I<module-dir>" in its copts.
 	if c, ok := module.compiler.(*baseCompiler); ok && c.includeBuildDirectory() {
 		copts.Value = append(copts.Value, includeFlag("."))
 	} else if c, ok := module.compiler.(*libraryDecorator); ok && c.includeBuildDirectory() {
 		copts.Value = append(copts.Value, includeFlag("."))
 	}

 	for arch, props := range module.GetArchProperties(&BaseCompilerProperties{}) {
 		if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
 			// If there's arch specific srcs or exclude_srcs, generate a select entry for it.
 			// TODO(b/186153868): do this for OS specific srcs and exclude_srcs too.
 			if len(baseCompilerProps.Srcs) > 0 || len(baseCompilerProps.Exclude_srcs) > 0 {
 				srcsList := parseSrcs(baseCompilerProps)
 				srcs.SetValueForArch(arch.Name, srcsList)
 				// The base srcs value should not contain any arch-specific excludes.
 				srcs.Value = bazel.SubtractBazelLabelList(srcs.Value, bazel.LabelList{Includes: srcsList.Excludes})
 			}

 			copts.SetValueForArch(arch.Name, parseCopts(baseCompilerProps))
 		}
 	}

 	// After going through all archs, delete the duplicate files in the arch
 	// values that are already in the base srcs.Value.
 	for arch, props := range module.GetArchProperties(&BaseCompilerProperties{}) {
 		if _, ok := props.(*BaseCompilerProperties); ok {
 			srcs.SetValueForArch(arch.Name, bazel.SubtractBazelLabelList(srcs.GetValueForArch(arch.Name), srcs.Value))
 		}
 	}

 	// Now that the srcs.Value list is finalized, compare it with the original
 	// list, and put the difference into the default condition for the arch
 	// select.
 	defaultsSrcs := bazel.SubtractBazelLabelList(baseSrcsLabelList, srcs.Value)
 	// TODO(b/186153868): handle the case with multiple variant types, e.g. when arch and os are both used.
 	srcs.SetValueForArch(bazel.CONDITIONS_DEFAULT, defaultsSrcs)

 	// Handle OS specific props.
 	for os, props := range module.GetTargetProperties(&BaseCompilerProperties{}) {
 		if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
 			srcsList := parseSrcs(baseCompilerProps)
 			// TODO(b/186153868): add support for os-specific srcs and exclude_srcs
 			srcs.SetValueForOS(os.Name, bazel.SubtractBazelLabelList(srcsList, baseSrcsLabelList))
 			copts.SetValueForOS(os.Name, parseCopts(baseCompilerProps))
 		}
 	}

 	return compilerAttributes{
 		srcs:  srcs,
 		copts: copts,
 	}
 }

 // Convenience struct to hold all attributes parsed from linker properties.
 type linkerAttributes struct {
 	deps     bazel.LabelListAttribute
 	linkopts bazel.StringListAttribute
 }

 // bp2BuildParseLinkerProps creates a label list attribute containing the header library deps of a module, including
 // configurable attribute values.
 func bp2BuildParseLinkerProps(ctx android.TopDownMutatorContext, module *Module) linkerAttributes {
 	var deps bazel.LabelListAttribute
 	var linkopts bazel.StringListAttribute

 	for _, linkerProps := range module.linker.linkerProps() {
 		if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
 			libs := baseLinkerProps.Header_libs
 			libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
 			libs = append(libs, baseLinkerProps.Static_libs...)
 			libs = append(libs, baseLinkerProps.Whole_static_libs...)
 			libs = android.SortedUniqueStrings(libs)
 			deps = bazel.MakeLabelListAttribute(android.BazelLabelForModuleDeps(ctx, libs))
 			linkopts.Value = baseLinkerProps.Ldflags
 			break
 		}
 	}

 	for arch, p := range module.GetArchProperties(&BaseLinkerProperties{}) {
 		if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
 			libs := baseLinkerProps.Header_libs
 			libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
 			libs = append(libs, baseLinkerProps.Static_libs...)
 			libs = append(libs, baseLinkerProps.Whole_static_libs...)
 			libs = android.SortedUniqueStrings(libs)
 			deps.SetValueForArch(arch.Name, android.BazelLabelForModuleDeps(ctx, libs))
 			linkopts.SetValueForArch(arch.Name, baseLinkerProps.Ldflags)
 		}
 	}

 	for os, p := range module.GetTargetProperties(&BaseLinkerProperties{}) {
 		if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
 			libs := baseLinkerProps.Header_libs
 			libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
 			libs = append(libs, baseLinkerProps.Static_libs...)
 			libs = append(libs, baseLinkerProps.Whole_static_libs...)
 			libs = android.SortedUniqueStrings(libs)
 			deps.SetValueForOS(os.Name, android.BazelLabelForModuleDeps(ctx, libs))
 			linkopts.SetValueForOS(os.Name, baseLinkerProps.Ldflags)
 		}
 	}

 	return linkerAttributes{
 		deps:     deps,
 		linkopts: linkopts,
 	}
 }

 // Relativize a list of root-relative paths with respect to the module's
 // directory.
 //
 // include_dirs Soong prop are root-relative (b/183742505), but
 // local_include_dirs, export_include_dirs and export_system_include_dirs are
 // module dir relative. This function makes a list of paths entirely module dir
 // relative.
 //
 // For the `include` attribute, Bazel wants the paths to be relative to the
 // module.
 func bp2BuildMakePathsRelativeToModule(ctx android.BazelConversionPathContext, paths []string) []string {
 	var relativePaths []string
 	for _, path := range paths {
 		// Semantics of filepath.Rel: join(ModuleDir, rel(ModuleDir, path)) == path
 		relativePath, err := filepath.Rel(ctx.ModuleDir(), path)
 		if err != nil {
 			panic(err)
 		}
 		relativePaths = append(relativePaths, relativePath)
 	}
 	return relativePaths
 }

 // bp2BuildParseExportedIncludes creates a string list attribute contains the
 // exported included directories of a module.
 func bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) bazel.StringListAttribute {
 	libraryDecorator := module.linker.(*libraryDecorator)

 	// Export_system_include_dirs and export_include_dirs are already module dir
 	// relative, so they don't need to be relativized like include_dirs, which
 	// are root-relative.
 	includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
 	includeDirs = append(includeDirs, libraryDecorator.flagExporter.Properties.Export_include_dirs...)
 	includeDirsAttribute := bazel.MakeStringListAttribute(includeDirs)

 	for arch, props := range module.GetArchProperties(&FlagExporterProperties{}) {
 		if flagExporterProperties, ok := props.(*FlagExporterProperties); ok {
 			archIncludeDirs := flagExporterProperties.Export_system_include_dirs
 			archIncludeDirs = append(archIncludeDirs, flagExporterProperties.Export_include_dirs...)

 			// To avoid duplicate includes when base includes + arch includes are combined
 			// FIXME: This doesn't take conflicts between arch and os includes into account
 			archIncludeDirs = bazel.SubtractStrings(archIncludeDirs, includeDirs)

 			if len(archIncludeDirs) > 0 {
 				includeDirsAttribute.SetValueForArch(arch.Name, archIncludeDirs)
 			}
 		}
 	}

 	for os, props := range module.GetTargetProperties(&FlagExporterProperties{}) {
 		if flagExporterProperties, ok := props.(*FlagExporterProperties); ok {
 			osIncludeDirs := flagExporterProperties.Export_system_include_dirs
 			osIncludeDirs = append(osIncludeDirs, flagExporterProperties.Export_include_dirs...)

 			// To avoid duplicate includes when base includes + os includes are combined
 			// FIXME: This doesn't take conflicts between arch and os includes into account
 			osIncludeDirs = bazel.SubtractStrings(osIncludeDirs, includeDirs)

 			if len(osIncludeDirs) > 0 {
 				includeDirsAttribute.SetValueForOS(os.Name, osIncludeDirs)
 			}
 		}
 	}

 	return includeDirsAttribute
 }
	// 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 cc

	import (
	"android/soong/android"
	"android/soong/bazel"
	"path/filepath"
	)

	// bp2build functions and helpers for converting cc_* modules to Bazel.

	func init() {
	android.DepsBp2BuildMutators(RegisterDepsBp2Build)
	}

	func RegisterDepsBp2Build(ctx android.RegisterMutatorsContext) {
	ctx.BottomUp("cc_bp2build_deps", depsBp2BuildMutator)
	}

	// A naive deps mutator to add deps on all modules across all combinations of
	// target props for cc modules. This is needed to make module -> bazel label
	// resolution work in the bp2build mutator later. This is probably
	// the wrong way to do it, but it works.
	//
	// TODO(jingwen): can we create a custom os mutator in depsBp2BuildMutator to do this?
	func depsBp2BuildMutator(ctx android.BottomUpMutatorContext) {
	module, ok := ctx.Module().(*Module)
	if !ok {
	// Not a cc module
	return
	}

	if !module.ConvertWithBp2build(ctx) {
	return
	}

	var allDeps []string

	for _, p := range module.GetTargetProperties(&BaseLinkerProperties{}) {
	// arch specific linker props
	if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
	allDeps = append(allDeps, baseLinkerProps.Header_libs...)
	allDeps = append(allDeps, baseLinkerProps.Export_header_lib_headers...)
	allDeps = append(allDeps, baseLinkerProps.Static_libs...)
	allDeps = append(allDeps, baseLinkerProps.Whole_static_libs...)
	}
	}

	for _, p := range module.GetArchProperties(&BaseLinkerProperties{}) {
	// arch specific linker props
	if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
	allDeps = append(allDeps, baseLinkerProps.Header_libs...)
	allDeps = append(allDeps, baseLinkerProps.Export_header_lib_headers...)
	allDeps = append(allDeps, baseLinkerProps.Static_libs...)
	allDeps = append(allDeps, baseLinkerProps.Whole_static_libs...)
	}
	}

	// Deps in the static: { .. } and shared: { .. } props of a cc_library.
	if lib, ok := module.compiler.(*libraryDecorator); ok {
	allDeps = append(allDeps, lib.SharedProperties.Shared.Static_libs...)
	allDeps = append(allDeps, lib.SharedProperties.Shared.Whole_static_libs...)
	allDeps = append(allDeps, lib.SharedProperties.Shared.Shared_libs...)
	allDeps = append(allDeps, lib.SharedProperties.Shared.System_shared_libs...)

	allDeps = append(allDeps, lib.StaticProperties.Static.Static_libs...)
	allDeps = append(allDeps, lib.StaticProperties.Static.Whole_static_libs...)
	allDeps = append(allDeps, lib.StaticProperties.Static.Shared_libs...)
	allDeps = append(allDeps, lib.StaticProperties.Static.System_shared_libs...)
	}

	ctx.AddDependency(module, nil, android.SortedUniqueStrings(allDeps)...)
	}

	type sharedAttributes struct {
	staticDeps bazel.LabelListAttribute
	}

	// bp2buildParseSharedProps returns the attributes for the shared variant of a cc_library.
	func bp2BuildParseSharedProps(ctx android.TopDownMutatorContext, module *Module) sharedAttributes {
	lib, ok := module.compiler.(*libraryDecorator)
	if !ok {
	return sharedAttributes{}
	}

	var staticDeps bazel.LabelListAttribute

	staticDeps.Value = android.BazelLabelForModuleDeps(ctx, lib.SharedProperties.Shared.Whole_static_libs)

	return sharedAttributes{
	staticDeps: staticDeps,
	}
	}

	type staticAttributes struct {
	srcs bazel.LabelListAttribute
	}

	// bp2buildParseStaticProps returns the attributes for the static variant of a cc_library.
	func bp2BuildParseStaticProps(ctx android.TopDownMutatorContext, module *Module) staticAttributes {
	lib, ok := module.compiler.(*libraryDecorator)
	if !ok {
	return staticAttributes{}
	}

	var srcs bazel.LabelListAttribute
	srcs.Value = android.BazelLabelForModuleSrc(ctx, lib.StaticProperties.Static.Srcs)

	return staticAttributes{
	srcs: srcs,
	}
	}

	// Convenience struct to hold all attributes parsed from compiler properties.
	type compilerAttributes struct {
	copts bazel.StringListAttribute
	srcs bazel.LabelListAttribute
	includes bazel.StringListAttribute
	}

	// bp2BuildParseCompilerProps returns copts, srcs and hdrs and other attributes.
	func bp2BuildParseCompilerProps(ctx android.TopDownMutatorContext, module *Module) compilerAttributes {
	var srcs bazel.LabelListAttribute
	var copts bazel.StringListAttribute

	// Creates the -I flag for a directory, while making the directory relative
	// to the exec root for Bazel to work.
	includeFlag := func(dir string) string {
	// filepath.Join canonicalizes the path, i.e. it takes care of . or .. elements.
	return "-I" + filepath.Join(ctx.ModuleDir(), dir)
	}

	// Parse the list of module-relative include directories (-I).
	parseLocalIncludeDirs := func(baseCompilerProps *BaseCompilerProperties) []string {
	// include_dirs are root-relative, not module-relative.
	includeDirs := bp2BuildMakePathsRelativeToModule(ctx, baseCompilerProps.Include_dirs)
	return append(includeDirs, baseCompilerProps.Local_include_dirs...)
	}

	// Parse the list of copts.
	parseCopts := func(baseCompilerProps *BaseCompilerProperties) []string {
	copts := append([]string{}, baseCompilerProps.Cflags...)
	for _, dir := range parseLocalIncludeDirs(baseCompilerProps) {
	copts = append(copts, includeFlag(dir))
	}
	return copts
	}

	// baseSrcs contain the list of src files that are used for every configuration.
	var baseSrcs []string
	// baseExcludeSrcs contain the list of src files that are excluded for every configuration.
	var baseExcludeSrcs []string
	// baseSrcsLabelList is a clone of the base srcs LabelList, used for computing the
	// arch or os specific srcs later.
	var baseSrcsLabelList bazel.LabelList

	// Parse srcs from an arch or OS's props value, taking the base srcs and
	// exclude srcs into account.
	parseSrcs := func(baseCompilerProps *BaseCompilerProperties) bazel.LabelList {
	// Combine the base srcs and arch-specific srcs
	allSrcs := append(baseSrcs, baseCompilerProps.Srcs...)
	// Combine the base exclude_srcs and configuration-specific exclude_srcs
	allExcludeSrcs := append(baseExcludeSrcs, baseCompilerProps.Exclude_srcs...)
	return android.BazelLabelForModuleSrcExcludes(ctx, allSrcs, allExcludeSrcs)
	}

	for _, props := range module.compiler.compilerProps() {
	if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
	srcs.Value = parseSrcs(baseCompilerProps)
	copts.Value = parseCopts(baseCompilerProps)

	// Used for arch-specific srcs later.
	baseSrcs = baseCompilerProps.Srcs
	baseExcludeSrcs = baseCompilerProps.Exclude_srcs
	baseSrcsLabelList = parseSrcs(baseCompilerProps)
	break
	}
	}

	// Handle include_build_directory prop. If the property is true, then the
	// target has access to all headers recursively in the package, and has
	// "-I<module-dir>" in its copts.
	if c, ok := module.compiler.(*baseCompiler); ok && c.includeBuildDirectory() {
	copts.Value = append(copts.Value, includeFlag("."))
	} else if c, ok := module.compiler.(*libraryDecorator); ok && c.includeBuildDirectory() {
	copts.Value = append(copts.Value, includeFlag("."))
	}

	for arch, props := range module.GetArchProperties(&BaseCompilerProperties{}) {
	if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
	// If there's arch specific srcs or exclude_srcs, generate a select entry for it.
	// TODO(b/186153868): do this for OS specific srcs and exclude_srcs too.
	if len(baseCompilerProps.Srcs) > 0 \|\| len(baseCompilerProps.Exclude_srcs) > 0 {
	srcsList := parseSrcs(baseCompilerProps)
	srcs.SetValueForArch(arch.Name, srcsList)
	// The base srcs value should not contain any arch-specific excludes.
	srcs.Value = bazel.SubtractBazelLabelList(srcs.Value, bazel.LabelList{Includes: srcsList.Excludes})
	}

	copts.SetValueForArch(arch.Name, parseCopts(baseCompilerProps))
	}
	}

	// After going through all archs, delete the duplicate files in the arch
	// values that are already in the base srcs.Value.
	for arch, props := range module.GetArchProperties(&BaseCompilerProperties{}) {
	if _, ok := props.(*BaseCompilerProperties); ok {
	srcs.SetValueForArch(arch.Name, bazel.SubtractBazelLabelList(srcs.GetValueForArch(arch.Name), srcs.Value))
	}
	}

	// Now that the srcs.Value list is finalized, compare it with the original
	// list, and put the difference into the default condition for the arch
	// select.
	defaultsSrcs := bazel.SubtractBazelLabelList(baseSrcsLabelList, srcs.Value)
	// TODO(b/186153868): handle the case with multiple variant types, e.g. when arch and os are both used.
	srcs.SetValueForArch(bazel.CONDITIONS_DEFAULT, defaultsSrcs)

	// Handle OS specific props.
	for os, props := range module.GetTargetProperties(&BaseCompilerProperties{}) {
	if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
	srcsList := parseSrcs(baseCompilerProps)
	// TODO(b/186153868): add support for os-specific srcs and exclude_srcs
	srcs.SetValueForOS(os.Name, bazel.SubtractBazelLabelList(srcsList, baseSrcsLabelList))
	copts.SetValueForOS(os.Name, parseCopts(baseCompilerProps))
	}
	}

	return compilerAttributes{
	srcs: srcs,
	copts: copts,
	}
	}

	// Convenience struct to hold all attributes parsed from linker properties.
	type linkerAttributes struct {
	deps bazel.LabelListAttribute
	linkopts bazel.StringListAttribute
	}

	// bp2BuildParseLinkerProps creates a label list attribute containing the header library deps of a module, including
	// configurable attribute values.
	func bp2BuildParseLinkerProps(ctx android.TopDownMutatorContext, module *Module) linkerAttributes {
	var deps bazel.LabelListAttribute
	var linkopts bazel.StringListAttribute

	for _, linkerProps := range module.linker.linkerProps() {
	if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
	libs := baseLinkerProps.Header_libs
	libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
	libs = append(libs, baseLinkerProps.Static_libs...)
	libs = append(libs, baseLinkerProps.Whole_static_libs...)
	libs = android.SortedUniqueStrings(libs)
	deps = bazel.MakeLabelListAttribute(android.BazelLabelForModuleDeps(ctx, libs))
	linkopts.Value = baseLinkerProps.Ldflags
	break
	}
	}

	for arch, p := range module.GetArchProperties(&BaseLinkerProperties{}) {
	if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
	libs := baseLinkerProps.Header_libs
	libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
	libs = append(libs, baseLinkerProps.Static_libs...)
	libs = append(libs, baseLinkerProps.Whole_static_libs...)
	libs = android.SortedUniqueStrings(libs)
	deps.SetValueForArch(arch.Name, android.BazelLabelForModuleDeps(ctx, libs))
	linkopts.SetValueForArch(arch.Name, baseLinkerProps.Ldflags)
	}
	}

	for os, p := range module.GetTargetProperties(&BaseLinkerProperties{}) {
	if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
	libs := baseLinkerProps.Header_libs
	libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
	libs = append(libs, baseLinkerProps.Static_libs...)
	libs = append(libs, baseLinkerProps.Whole_static_libs...)
	libs = android.SortedUniqueStrings(libs)
	deps.SetValueForOS(os.Name, android.BazelLabelForModuleDeps(ctx, libs))
	linkopts.SetValueForOS(os.Name, baseLinkerProps.Ldflags)
	}
	}

	return linkerAttributes{
	deps: deps,
	linkopts: linkopts,
	}
	}

	// Relativize a list of root-relative paths with respect to the module's
	// directory.
	//
	// include_dirs Soong prop are root-relative (b/183742505), but
	// local_include_dirs, export_include_dirs and export_system_include_dirs are
	// module dir relative. This function makes a list of paths entirely module dir
	// relative.
	//
	// For the `include` attribute, Bazel wants the paths to be relative to the
	// module.
	func bp2BuildMakePathsRelativeToModule(ctx android.BazelConversionPathContext, paths []string) []string {
	var relativePaths []string
	for _, path := range paths {
	// Semantics of filepath.Rel: join(ModuleDir, rel(ModuleDir, path)) == path
	relativePath, err := filepath.Rel(ctx.ModuleDir(), path)
	if err != nil {
	panic(err)
	}
	relativePaths = append(relativePaths, relativePath)
	}
	return relativePaths
	}

	// bp2BuildParseExportedIncludes creates a string list attribute contains the
	// exported included directories of a module.
	func bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) bazel.StringListAttribute {
	libraryDecorator := module.linker.(*libraryDecorator)

	// Export_system_include_dirs and export_include_dirs are already module dir
	// relative, so they don't need to be relativized like include_dirs, which
	// are root-relative.
	includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
	includeDirs = append(includeDirs, libraryDecorator.flagExporter.Properties.Export_include_dirs...)
	includeDirsAttribute := bazel.MakeStringListAttribute(includeDirs)

	for arch, props := range module.GetArchProperties(&FlagExporterProperties{}) {
	if flagExporterProperties, ok := props.(*FlagExporterProperties); ok {
	archIncludeDirs := flagExporterProperties.Export_system_include_dirs
	archIncludeDirs = append(archIncludeDirs, flagExporterProperties.Export_include_dirs...)

	// To avoid duplicate includes when base includes + arch includes are combined
	// FIXME: This doesn't take conflicts between arch and os includes into account
	archIncludeDirs = bazel.SubtractStrings(archIncludeDirs, includeDirs)

	if len(archIncludeDirs) > 0 {
	includeDirsAttribute.SetValueForArch(arch.Name, archIncludeDirs)
	}
	}
	}

	for os, props := range module.GetTargetProperties(&FlagExporterProperties{}) {
	if flagExporterProperties, ok := props.(*FlagExporterProperties); ok {
	osIncludeDirs := flagExporterProperties.Export_system_include_dirs
	osIncludeDirs = append(osIncludeDirs, flagExporterProperties.Export_include_dirs...)

	// To avoid duplicate includes when base includes + os includes are combined
	// FIXME: This doesn't take conflicts between arch and os includes into account
	osIncludeDirs = bazel.SubtractStrings(osIncludeDirs, includeDirs)

	if len(osIncludeDirs) > 0 {
	includeDirsAttribute.SetValueForOS(os.Name, osIncludeDirs)
	}
	}
	}

	return includeDirsAttribute
	}