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platform_build_soong
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Merge "Add os/target configurable selects for label list attributes."

This commit is contained in:
Jingwen Chen 2021-04-05 07:09:48 +00:00 committed by Gerrit Code Review
parent 0774773a65 91220d7334
commit 1a6bbbd990
13 changed files with 580 additions and 170 deletions
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87
android/arch.go
View File

@ -1709,3 +1709,90 @@ func (m *ModuleBase) GetArchProperties(dst interface{}) map[ArchType]interface{}
}
return archToProp
}
// GetTargetProperties returns a map of OS target (e.g. android, windows) to the
// values of the properties of the 'dst' struct that are specific to that OS
// target.
//
// For example, passing a struct { Foo bool, Bar string } will return an
// interface{} that can be type asserted back into the same struct, containing
// the os-specific property value specified by the module if defined.
//
// While this looks similar to GetArchProperties, the internal representation of
// the properties have a slightly different layout to warrant a standalone
// lookup function.
func (m *ModuleBase) GetTargetProperties(dst interface{}) map[OsType]interface{} {
// Return value of the arch types to the prop values for that arch.
osToProp := map[OsType]interface{}{}
// Nothing to do for non-OS/arch-specific modules.
if !m.ArchSpecific() {
return osToProp
}
// archProperties has the type of [][]interface{}. Looks complicated, so
// let's explain this step by step.
//
// Loop over the outer index, which determines the property struct that
// contains a matching set of properties in dst that we're interested in.
// For example, BaseCompilerProperties or BaseLinkerProperties.
for i := range m.archProperties {
if m.archProperties[i] == nil {
continue
}
// Iterate over the supported OS types
for _, os := range OsTypeList {
// e.g android, linux_bionic
field := os.Field
// If it's not nil, loop over the inner index, which determines the arch variant
// of the prop type. In an Android.bp file, this is like looping over:
//
// target: { android: { key: value, ... }, linux_bionic: { key: value, ... } }
for _, archProperties := range m.archProperties[i] {
archPropValues := reflect.ValueOf(archProperties).Elem()
// This is the archPropRoot struct. Traverse into the Targetnested struct.
src := archPropValues.FieldByName("Target").Elem()
// Step into non-nil pointers to structs in the src value.
if src.Kind() == reflect.Ptr {
if src.IsNil() {
continue
}
src = src.Elem()
}
// Find the requested field (e.g. android, linux_bionic) in the src struct.
src = src.FieldByName(field)
// Validation steps. We want valid non-nil pointers to structs.
if !src.IsValid() || src.IsNil() {
continue
}
if src.Kind() != reflect.Ptr || src.Elem().Kind() != reflect.Struct {
continue
}
// Clone the destination prop, since we want a unique prop struct per arch.
dstClone := reflect.New(reflect.ValueOf(dst).Elem().Type()).Interface()
// Copy the located property struct into the cloned destination property struct.
err := proptools.ExtendMatchingProperties([]interface{}{dstClone}, src.Interface(), nil, proptools.OrderReplace)
if err != nil {
// This is fine, it just means the src struct doesn't match.
continue
}
// Found the prop for the os, you have.
osToProp[os] = dstClone
// Go to the next prop.
break
}
}
}
return osToProp
}

10
android/bazel.go
View File

@ -108,6 +108,11 @@ type Bp2BuildConfig map[string]BazelConversionConfigEntry
type BazelConversionConfigEntry int
const (
// A sentinel value to be used as a key in Bp2BuildConfig for modules with
// no package path. This is also the module dir for top level Android.bp
// modules.
BP2BUILD_TOPLEVEL = "."
// iota + 1 ensures that the int value is not 0 when used in the Bp2buildAllowlist map,
// which can also mean that the key doesn't exist in a lookup.
@ -224,10 +229,15 @@ func (b *BazelModuleBase) ConvertWithBp2build(ctx BazelConversionPathContext) bo
func bp2buildDefaultTrueRecursively(packagePath string, config Bp2BuildConfig) bool {
ret := false
// Return exact matches in the config.
if config[packagePath] == Bp2BuildDefaultTrueRecursively {
return true
}
if config[packagePath] == Bp2BuildDefaultFalse {
return false
}
// If not, check for the config recursively.
packagePrefix := ""
// e.g. for x/y/z, iterate over x, x/y, then x/y/z, taking the final value from the allowlist.
for _, part := range strings.Split(packagePath, "/") {

26
android/bazel_handler.go
View File

@ -270,13 +270,23 @@ func (context *bazelContext) issueBazelCommand(runName bazel.RunName, command st
cmdFlags = append(cmdFlags, labels...)
cmdFlags = append(cmdFlags, "--package_path=%workspace%/"+context.intermediatesDir())
cmdFlags = append(cmdFlags, "--profile="+shared.BazelMetricsFilename(context, runName))
// Set default platforms to canonicalized values for mixed builds requests. If these are set
// in the bazelrc, they will have values that are non-canonicalized, and thus be invalid.
// The actual platform values here may be overridden by configuration transitions from the buildroot.
// Set default platforms to canonicalized values for mixed builds requests.
// If these are set in the bazelrc, they will have values that are
// non-canonicalized to @sourceroot labels, and thus be invalid when
// referenced from the buildroot.
//
// The actual platform values here may be overridden by configuration
// transitions from the buildroot.
cmdFlags = append(cmdFlags,
fmt.Sprintf("--platforms=%s", canonicalizeLabel("//build/bazel/platforms:generic_x86_64")))
fmt.Sprintf("--platforms=%s", canonicalizeLabel("//build/bazel/platforms:android_x86_64")))
cmdFlags = append(cmdFlags,
fmt.Sprintf("--extra_toolchains=%s", canonicalizeLabel("//prebuilts/clang/host/linux-x86:all")))
// This should be parameterized on the host OS, but let's restrict to linux
// to keep things simple for now.
cmdFlags = append(cmdFlags,
fmt.Sprintf("--host_platform=%s", canonicalizeLabel("//build/bazel/platforms:linux_x86_64")))
// Explicitly disable downloading rules (such as canonical C++ and Java rules) from the network.
cmdFlags = append(cmdFlags, "--experimental_repository_disable_download")
cmdFlags = append(cmdFlags, extraFlags...)
@ -328,7 +338,7 @@ func (context *bazelContext) mainBzlFileContents() []byte {
def _config_node_transition_impl(settings, attr):
return {
"//command_line_option:platforms": "@sourceroot//build/bazel/platforms:generic_%s" % attr.arch,
"//command_line_option:platforms": "@sourceroot//build/bazel/platforms:android_%s" % attr.arch,
}
_config_node_transition = transition(
@ -504,10 +514,10 @@ def get_arch(target):
platform_name = build_options(target)["//command_line_option:platforms"][0].name
if platform_name == "host":
return "HOST"
elif not platform_name.startswith("generic_"):
fail("expected platform name of the form 'generic_<arch>', but was " + str(platforms))
elif not platform_name.startswith("android_"):
fail("expected platform name of the form 'android_<arch>', but was " + str(platforms))
return "UNKNOWN"
return platform_name[len("generic_"):]
return platform_name[len("android_"):]
def format(target):
id_string = str(target.label) + "|" + get_arch(target)

176
bazel/properties.go
View File

@ -80,10 +80,19 @@ func UniqueBazelLabelList(originalLabelList LabelList) LabelList {
}
const (
ARCH_X86 = "x86"
ARCH_X86_64 = "x86_64"
// ArchType names in arch.go
ARCH_ARM = "arm"
ARCH_ARM64 = "arm64"
ARCH_X86 = "x86"
ARCH_X86_64 = "x86_64"
// OsType names in arch.go
OS_ANDROID = "android"
OS_DARWIN = "darwin"
OS_FUCHSIA = "fuchsia"
OS_LINUX = "linux_glibc"
OS_LINUX_BIONIC = "linux_bionic"
OS_WINDOWS = "windows"
)
var (
@ -92,6 +101,36 @@ var (
// android package depends on the bazel package, so a cyclic dependency
// prevents using that here.
selectableArchs = []string{ARCH_X86, ARCH_X86_64, ARCH_ARM, ARCH_ARM64}
// Likewise, this is the list of target operating systems.
selectableTargetOs = []string{
OS_ANDROID,
OS_DARWIN,
OS_FUCHSIA,
OS_LINUX,
OS_LINUX_BIONIC,
OS_WINDOWS,
}
// A map of architectures to the Bazel label of the constraint_value
// for the @platforms//cpu:cpu constraint_setting
PlatformArchMap = map[string]string{
ARCH_ARM: "//build/bazel/platforms/arch:arm",
ARCH_ARM64: "//build/bazel/platforms/arch:arm64",
ARCH_X86: "//build/bazel/platforms/arch:x86",
ARCH_X86_64: "//build/bazel/platforms/arch:x86_64",
}
// A map of target operating systems to the Bazel label of the
// constraint_value for the @platforms//os:os constraint_setting
PlatformOsMap = map[string]string{
OS_ANDROID: "//build/bazel/platforms/os:android",
OS_DARWIN: "//build/bazel/platforms/os:darwin",
OS_FUCHSIA: "//build/bazel/platforms/os:fuchsia",
OS_LINUX: "//build/bazel/platforms/os:linux",
OS_LINUX_BIONIC: "//build/bazel/platforms/os:linux_bionic",
OS_WINDOWS: "//build/bazel/platforms/os:windows",
}
)
// Arch-specific label_list typed Bazel attribute values. This should correspond
@ -101,8 +140,16 @@ type labelListArchValues struct {
X86_64 LabelList
Arm LabelList
Arm64 LabelList
// TODO(b/181299724): this is currently missing the "common" arch, which
// doesn't have an equivalent platform() definition yet.
Common LabelList
}
type labelListOsValues struct {
Android LabelList
Darwin LabelList
Fuchsia LabelList
Linux LabelList
LinuxBionic LabelList
Windows LabelList
}
// LabelListAttribute is used to represent a list of Bazel labels as an
@ -115,6 +162,11 @@ type LabelListAttribute struct {
// are generated in a select statement and appended to the non-arch specific
// label list Value.
ArchValues labelListArchValues
// The os-specific attribute label list values. Optional. If used, these
// are generated in a select statement and appended to the non-os specific
// label list Value.
OsValues labelListOsValues
}
// MakeLabelListAttribute initializes a LabelListAttribute with the non-arch specific value.
@ -124,45 +176,75 @@ func MakeLabelListAttribute(value LabelList) LabelListAttribute {
// HasArchSpecificValues returns true if the attribute contains
// architecture-specific label_list values.
func (attrs *LabelListAttribute) HasArchSpecificValues() bool {
func (attrs *LabelListAttribute) HasConfigurableValues() bool {
for _, arch := range selectableArchs {
if len(attrs.GetValueForArch(arch).Includes) > 0 || len(attrs.GetValueForArch(arch).Excludes) > 0 {
if len(attrs.GetValueForArch(arch).Includes) > 0 {
return true
}
}
for _, os := range selectableTargetOs {
if len(attrs.GetValueForOS(os).Includes) > 0 {
return true
}
}
return false
}
func (attrs *LabelListAttribute) archValuePtrs() map[string]*LabelList {
return map[string]*LabelList{
ARCH_X86: &attrs.ArchValues.X86,
ARCH_X86_64: &attrs.ArchValues.X86_64,
ARCH_ARM: &attrs.ArchValues.Arm,
ARCH_ARM64: &attrs.ArchValues.Arm64,
}
}
// GetValueForArch returns the label_list attribute value for an architecture.
func (attrs *LabelListAttribute) GetValueForArch(arch string) LabelList {
switch arch {
case ARCH_X86:
return attrs.ArchValues.X86
case ARCH_X86_64:
return attrs.ArchValues.X86_64
case ARCH_ARM:
return attrs.ArchValues.Arm
case ARCH_ARM64:
return attrs.ArchValues.Arm64
default:
var v *LabelList
if v = attrs.archValuePtrs()[arch]; v == nil {
panic(fmt.Errorf("Unknown arch: %s", arch))
}
return *v
}
// SetValueForArch sets the label_list attribute value for an architecture.
func (attrs *LabelListAttribute) SetValueForArch(arch string, value LabelList) {
switch arch {
case "x86":
attrs.ArchValues.X86 = value
case "x86_64":
attrs.ArchValues.X86_64 = value
case "arm":
attrs.ArchValues.Arm = value
case "arm64":
attrs.ArchValues.Arm64 = value
default:
var v *LabelList
if v = attrs.archValuePtrs()[arch]; v == nil {
panic(fmt.Errorf("Unknown arch: %s", arch))
}
*v = value
}
func (attrs *LabelListAttribute) osValuePtrs() map[string]*LabelList {
return map[string]*LabelList{
OS_ANDROID: &attrs.OsValues.Android,
OS_DARWIN: &attrs.OsValues.Darwin,
OS_FUCHSIA: &attrs.OsValues.Fuchsia,
OS_LINUX: &attrs.OsValues.Linux,
OS_LINUX_BIONIC: &attrs.OsValues.LinuxBionic,
OS_WINDOWS: &attrs.OsValues.Windows,
}
}
// GetValueForOS returns the label_list attribute value for an OS target.
func (attrs *LabelListAttribute) GetValueForOS(os string) LabelList {
var v *LabelList
if v = attrs.osValuePtrs()[os]; v == nil {
panic(fmt.Errorf("Unknown os: %s", os))
}
return *v
}
// SetValueForArch sets the label_list attribute value for an OS target.
func (attrs *LabelListAttribute) SetValueForOS(os string, value LabelList) {
var v *LabelList
if v = attrs.osValuePtrs()[os]; v == nil {
panic(fmt.Errorf("Unknown os: %s", os))
}
*v = value
}
// StringListAttribute corresponds to the string_list Bazel attribute type with
@ -182,13 +264,12 @@ type stringListArchValues struct {
X86_64 []string
Arm []string
Arm64 []string
// TODO(b/181299724): this is currently missing the "common" arch, which
// doesn't have an equivalent platform() definition yet.
Common []string
}
// HasArchSpecificValues returns true if the attribute contains
// HasConfigurableValues returns true if the attribute contains
// architecture-specific string_list values.
func (attrs *StringListAttribute) HasArchSpecificValues() bool {
func (attrs *StringListAttribute) HasConfigurableValues() bool {
for _, arch := range selectableArchs {
if len(attrs.GetValueForArch(arch)) > 0 {
return true
@ -197,36 +278,31 @@ func (attrs *StringListAttribute) HasArchSpecificValues() bool {
return false
}
func (attrs *StringListAttribute) archValuePtrs() map[string]*[]string {
return map[string]*[]string{
ARCH_X86: &attrs.ArchValues.X86,
ARCH_X86_64: &attrs.ArchValues.X86_64,
ARCH_ARM: &attrs.ArchValues.Arm,
ARCH_ARM64: &attrs.ArchValues.Arm64,
}
}
// GetValueForArch returns the string_list attribute value for an architecture.
func (attrs *StringListAttribute) GetValueForArch(arch string) []string {
switch arch {
case ARCH_X86:
return attrs.ArchValues.X86
case ARCH_X86_64:
return attrs.ArchValues.X86_64
case ARCH_ARM:
return attrs.ArchValues.Arm
case ARCH_ARM64:
return attrs.ArchValues.Arm64
default:
var v *[]string
if v = attrs.archValuePtrs()[arch]; v == nil {
panic(fmt.Errorf("Unknown arch: %s", arch))
}
return *v
}
// SetValueForArch sets the string_list attribute value for an architecture.
func (attrs *StringListAttribute) SetValueForArch(arch string, value []string) {
switch arch {
case ARCH_X86:
attrs.ArchValues.X86 = value
case ARCH_X86_64:
attrs.ArchValues.X86_64 = value
case ARCH_ARM:
attrs.ArchValues.Arm = value
case ARCH_ARM64:
attrs.ArchValues.Arm64 = value
default:
var v *[]string
if v = attrs.archValuePtrs()[arch]; v == nil {
panic(fmt.Errorf("Unknown arch: %s", arch))
}
*v = value
}
// TryVariableSubstitution, replace string substitution formatting within each string in slice with

56
bp2build/build_conversion.go
View File

@ -416,63 +416,11 @@ func prettyPrint(propertyValue reflect.Value, indent int) (string, error) {
// Special cases where the bp2build sends additional information to the codegenerator
// by wrapping the attributes in a custom struct type.
if labels, ok := propertyValue.Interface().(bazel.LabelListAttribute); ok {
// TODO(b/165114590): convert glob syntax
ret, err := prettyPrint(reflect.ValueOf(labels.Value.Includes), indent)
if err != nil {
return ret, err
}
if !labels.HasArchSpecificValues() {
// Select statement not needed.
return ret, nil
}
ret += " + " + "select({\n"
for _, arch := range android.ArchTypeList() {
value := labels.GetValueForArch(arch.Name)
if len(value.Includes) > 0 {
ret += makeIndent(indent + 1)
list, _ := prettyPrint(reflect.ValueOf(value.Includes), indent+1)
ret += fmt.Sprintf("\"%s\": %s,\n", platformArchMap[arch], list)
}
}
ret += makeIndent(indent + 1)
ret += fmt.Sprintf("\"%s\": [],\n", "//conditions:default")
ret += makeIndent(indent)
ret += "})"
return ret, err
return prettyPrintLabelListAttribute(labels, indent)
} else if label, ok := propertyValue.Interface().(bazel.Label); ok {
return fmt.Sprintf("%q", label.Label), nil
} else if stringList, ok := propertyValue.Interface().(bazel.StringListAttribute); ok {
// A Bazel string_list attribute that may contain a select statement.
ret, err := prettyPrint(reflect.ValueOf(stringList.Value), indent)
if err != nil {
return ret, err
}
if !stringList.HasArchSpecificValues() {
// Select statement not needed.
return ret, nil
}
ret += " + " + "select({\n"
for _, arch := range android.ArchTypeList() {
value := stringList.GetValueForArch(arch.Name)
if len(value) > 0 {
ret += makeIndent(indent + 1)
list, _ := prettyPrint(reflect.ValueOf(value), indent+1)
ret += fmt.Sprintf("\"%s\": %s,\n", platformArchMap[arch], list)
}
}
ret += makeIndent(indent + 1)
ret += fmt.Sprintf("\"%s\": [],\n", "//conditions:default")
ret += makeIndent(indent)
ret += "})"
return ret, err
return prettyPrintStringListAttribute(stringList, indent)
}
ret = "{\n"

106
bp2build/cc_library_headers_conversion_test.go
View File

@ -110,13 +110,11 @@ func TestCcLibraryHeadersBp2Build(t *testing.T) {
cc_library_headers {
name: "lib-1",
export_include_dirs: ["lib-1"],
bazel_module: { bp2build_available: true },
}
cc_library_headers {
name: "lib-2",
export_include_dirs: ["lib-2"],
bazel_module: { bp2build_available: true },
}
cc_library_headers {
@ -125,7 +123,6 @@ cc_library_headers {
header_libs: ["lib-1", "lib-2"],
// TODO: Also support export_header_lib_headers
bazel_module: { bp2build_available: true },
}`,
expectedBazelTargets: []string{`cc_library_headers(
name = "foo_headers",
@ -161,6 +158,106 @@ cc_library_headers {
includes = [
"lib-2",
],
)`},
},
{
description: "cc_library_headers test with os-specific header_libs props",
moduleTypeUnderTest: "cc_library_headers",
moduleTypeUnderTestFactory: cc.LibraryHeaderFactory,
moduleTypeUnderTestBp2BuildMutator: cc.CcLibraryHeadersBp2Build,
depsMutators: []android.RegisterMutatorFunc{cc.RegisterDepsBp2Build},
filesystem: map[string]string{},
bp: soongCcLibraryPreamble + `
cc_library_headers { name: "android-lib" }
cc_library_headers { name: "base-lib" }
cc_library_headers { name: "darwin-lib" }
cc_library_headers { name: "fuchsia-lib" }
cc_library_headers { name: "linux-lib" }
cc_library_headers { name: "linux_bionic-lib" }
cc_library_headers { name: "windows-lib" }
cc_library_headers {
name: "foo_headers",
header_libs: ["base-lib"],
target: {
android: { header_libs: ["android-lib"] },
darwin: { header_libs: ["darwin-lib"] },
fuchsia: { header_libs: ["fuchsia-lib"] },
linux_bionic: { header_libs: ["linux_bionic-lib"] },
linux_glibc: { header_libs: ["linux-lib"] },
windows: { header_libs: ["windows-lib"] },
},
bazel_module: { bp2build_available: true },
}`,
expectedBazelTargets: []string{`cc_library_headers(
name = "android-lib",
)`, `cc_library_headers(
name = "base-lib",
)`, `cc_library_headers(
name = "darwin-lib",
)`, `cc_library_headers(
name = "foo_headers",
deps = [
":base-lib",
] + select({
"//build/bazel/platforms/os:android": [
":android-lib",
],
"//build/bazel/platforms/os:darwin": [
":darwin-lib",
],
"//build/bazel/platforms/os:fuchsia": [
":fuchsia-lib",
],
"//build/bazel/platforms/os:linux": [
":linux-lib",
],
"//build/bazel/platforms/os:linux_bionic": [
":linux_bionic-lib",
],
"//build/bazel/platforms/os:windows": [
":windows-lib",
],
"//conditions:default": [],
}),
)`, `cc_library_headers(
name = "fuchsia-lib",
)`, `cc_library_headers(
name = "linux-lib",
)`, `cc_library_headers(
name = "linux_bionic-lib",
)`, `cc_library_headers(
name = "windows-lib",
)`},
},
{
description: "cc_library_headers test with os-specific header_libs and export_header_lib_headers props",
moduleTypeUnderTest: "cc_library_headers",
moduleTypeUnderTestFactory: cc.LibraryHeaderFactory,
moduleTypeUnderTestBp2BuildMutator: cc.CcLibraryHeadersBp2Build,
depsMutators: []android.RegisterMutatorFunc{cc.RegisterDepsBp2Build},
filesystem: map[string]string{},
bp: soongCcLibraryPreamble + `
cc_library_headers { name: "android-lib" }
cc_library_headers { name: "exported-lib" }
cc_library_headers {
name: "foo_headers",
target: {
android: { header_libs: ["android-lib"], export_header_lib_headers: ["exported-lib"] },
},
}`,
expectedBazelTargets: []string{`cc_library_headers(
name = "android-lib",
)`, `cc_library_headers(
name = "exported-lib",
)`, `cc_library_headers(
name = "foo_headers",
deps = [] + select({
"//build/bazel/platforms/os:android": [
":android-lib",
":exported-lib",
],
"//conditions:default": [],
}),
)`},
},
}
@ -180,6 +277,9 @@ cc_library_headers {
config := android.TestConfig(buildDir, nil, testCase.bp, filesystem)
ctx := android.NewTestContext(config)
// TODO(jingwen): make this default for all bp2build tests
ctx.RegisterBp2BuildConfig(bp2buildConfig)
cc.RegisterCCBuildComponents(ctx)
ctx.RegisterModuleType("toolchain_library", cc.ToolchainLibraryFactory)

20
bp2build/cc_object_conversion_test.go
View File

@ -324,7 +324,7 @@ func TestCcObjectConfigurableAttributesBp2Build(t *testing.T) {
copts = [
"-fno-addrsig",
] + select({
"@bazel_tools//platforms:x86_32": [
"//build/bazel/platforms/arch:x86": [
"-fPIC",
],
"//conditions:default": [],
@ -335,7 +335,7 @@ func TestCcObjectConfigurableAttributesBp2Build(t *testing.T) {
srcs = [
"a.cpp",
] + select({
"@bazel_tools//platforms:arm": [
"//build/bazel/platforms/arch:arm": [
"arch/arm/file.S",
],
"//conditions:default": [],
@ -378,16 +378,16 @@ func TestCcObjectConfigurableAttributesBp2Build(t *testing.T) {
copts = [
"-fno-addrsig",
] + select({
"@bazel_tools//platforms:arm": [
"//build/bazel/platforms/arch:arm": [
"-Wall",
],
"@bazel_tools//platforms:aarch64": [
"//build/bazel/platforms/arch:arm64": [
"-Wall",
],
"@bazel_tools//platforms:x86_32": [
"//build/bazel/platforms/arch:x86": [
"-fPIC",
],
"@bazel_tools//platforms:x86_64": [
"//build/bazel/platforms/arch:x86_64": [
"-fPIC",
],
"//conditions:default": [],
@ -398,16 +398,16 @@ func TestCcObjectConfigurableAttributesBp2Build(t *testing.T) {
srcs = [
"base.cpp",
] + select({
"@bazel_tools//platforms:arm": [
"//build/bazel/platforms/arch:arm": [
"arm.cpp",
],
"@bazel_tools//platforms:aarch64": [
"//build/bazel/platforms/arch:arm64": [
"arm64.cpp",
],
"@bazel_tools//platforms:x86_32": [
"//build/bazel/platforms/arch:x86": [
"x86.cpp",
],
"@bazel_tools//platforms:x86_64": [
"//build/bazel/platforms/arch:x86_64": [
"x86_64.cpp",
],
"//conditions:default": [],

115
bp2build/configurability.go
View File

@ -1,15 +1,112 @@
package bp2build
import "android/soong/android"
import (
"android/soong/android"
"android/soong/bazel"
"fmt"
"reflect"
)
// Configurability support for bp2build.
var (
// A map of architectures to the Bazel label of the constraint_value.
platformArchMap = map[android.ArchType]string{
android.Arm: "@bazel_tools//platforms:arm",
android.Arm64: "@bazel_tools//platforms:aarch64",
android.X86: "@bazel_tools//platforms:x86_32",
android.X86_64: "@bazel_tools//platforms:x86_64",
// prettyPrintStringListAttribute converts a StringListAttribute to its Bazel
// syntax. May contain a select statement.
func prettyPrintStringListAttribute(stringList bazel.StringListAttribute, indent int) (string, error) {
ret, err := prettyPrint(reflect.ValueOf(stringList.Value), indent)
if err != nil {
return ret, err
}
)
if !stringList.HasConfigurableValues() {
// Select statement not needed.
return ret, nil
}
// Create the selects for arch specific values.
selects := map[string]reflect.Value{}
for arch, selectKey := range bazel.PlatformArchMap {
selects[selectKey] = reflect.ValueOf(stringList.GetValueForArch(arch))
}
selectMap, err := prettyPrintSelectMap(selects, "[]", indent)
return ret + selectMap, err
}
// prettyPrintLabelListAttribute converts a LabelListAttribute to its Bazel
// syntax. May contain select statements.
func prettyPrintLabelListAttribute(labels bazel.LabelListAttribute, indent int) (string, error) {
// TODO(b/165114590): convert glob syntax
ret, err := prettyPrint(reflect.ValueOf(labels.Value.Includes), indent)
if err != nil {
return ret, err
}
if !labels.HasConfigurableValues() {
// Select statements not needed.
return ret, nil
}
// Create the selects for arch specific values.
archSelects := map[string]reflect.Value{}
for arch, selectKey := range bazel.PlatformArchMap {
archSelects[selectKey] = reflect.ValueOf(labels.GetValueForArch(arch).Includes)
}
selectMap, err := prettyPrintSelectMap(archSelects, "[]", indent)
if err != nil {
return "", err
}
ret += selectMap
// Create the selects for target os specific values.
osSelects := map[string]reflect.Value{}
for os, selectKey := range bazel.PlatformOsMap {
osSelects[selectKey] = reflect.ValueOf(labels.GetValueForOS(os).Includes)
}
selectMap, err = prettyPrintSelectMap(osSelects, "[]", indent)
return ret + selectMap, err
}
// prettyPrintSelectMap converts a map of select keys to reflected Values as a generic way
// to construct a select map for any kind of attribute type.
func prettyPrintSelectMap(selectMap map[string]reflect.Value, defaultValue string, indent int) (string, error) {
var selects string
for _, selectKey := range android.SortedStringKeys(selectMap) {
value := selectMap[selectKey]
if isZero(value) {
// Ignore zero values to not generate empty lists.
continue
}
s, err := prettyPrintSelectEntry(value, selectKey, indent)
if err != nil {
return "", err
}
selects += s + ",\n"
}
if len(selects) == 0 {
// No conditions (or all values are empty lists), so no need for a map.
return "", nil
}
// Create the map.
ret := " + select({\n"
ret += selects
// default condition comes last.
ret += fmt.Sprintf("%s\"%s\": %s,\n", makeIndent(indent+1), "//conditions:default", defaultValue)
ret += makeIndent(indent)
ret += "})"
return ret, nil
}
// prettyPrintSelectEntry converts a reflect.Value into an entry in a select map
// with a provided key.
func prettyPrintSelectEntry(value reflect.Value, key string, indent int) (string, error) {
s := makeIndent(indent + 1)
v, err := prettyPrint(value, indent+1)
if err != nil {
return "", err
}
s += fmt.Sprintf("\"%s\": %s", key, v)
return s, nil
}

7
bp2build/testing.go
View File

@ -5,6 +5,13 @@ import (
"android/soong/bazel"
)
var (
// A default configuration for tests to not have to specify bp2build_available on top level targets.
bp2buildConfig = android.Bp2BuildConfig{
android.BP2BUILD_TOPLEVEL: android.Bp2BuildDefaultTrueRecursively,
}
)
type nestedProps struct {
Nested_prop string
}

1
cc/Android.bp
View File

@ -20,6 +20,7 @@ bootstrap_go_package {
"androidmk.go",
"api_level.go",
"builder.go",
"bp2build.go",
"cc.go",
"ccdeps.go",
"check.go",

106
cc/bp2build.go Normal file
View File

@ -0,0 +1,106 @@
// 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"
)
// 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...)
}
}
ctx.AddDependency(module, nil, android.SortedUniqueStrings(allDeps)...)
}
// bp2BuildParseHeaderLibs creates a label list attribute containing the header library deps of a module, including
// configurable attribute values.
func bp2BuildParseHeaderLibs(ctx android.TopDownMutatorContext, module *Module) bazel.LabelListAttribute {
var ret bazel.LabelListAttribute
for _, linkerProps := range module.linker.linkerProps() {
if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
libs := baseLinkerProps.Header_libs
libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
ret = bazel.MakeLabelListAttribute(
android.BazelLabelForModuleDeps(ctx, android.SortedUniqueStrings(libs)))
break
}
}
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 = android.SortedUniqueStrings(libs)
ret.SetValueForOS(os.Name, android.BazelLabelForModuleDeps(ctx, libs))
}
}
return ret
}
// bp2BuildParseExportedIncludes creates a label list attribute contains the
// exported included directories of a module.
func bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) (bazel.LabelListAttribute, bazel.LabelListAttribute) {
libraryDecorator := module.linker.(*libraryDecorator)
includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
includeDirs = append(includeDirs, libraryDecorator.flagExporter.Properties.Export_include_dirs...)
includeDirsLabels := android.BazelLabelForModuleSrc(ctx, includeDirs)
var includeDirGlobs []string
for _, includeDir := range includeDirs {
includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.h")
includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.inc")
includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.hpp")
}
headersLabels := android.BazelLabelForModuleSrc(ctx, includeDirGlobs)
return bazel.MakeLabelListAttribute(includeDirsLabels), bazel.MakeLabelListAttribute(headersLabels)
}

36
cc/library.go
View File

@ -2046,38 +2046,6 @@ func maybeInjectBoringSSLHash(ctx android.ModuleContext, outputFile android.Modu
return outputFile
}
func Bp2BuildParseHeaderLibs(ctx android.TopDownMutatorContext, module *Module) bazel.LabelListAttribute {
var headerLibs []string
for _, linkerProps := range module.linker.linkerProps() {
if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
headerLibs = baseLinkerProps.Header_libs
// FIXME: re-export include dirs from baseLinkerProps.Export_header_lib_headers?
break
}
}
headerLibsLabels := bazel.MakeLabelListAttribute(android.BazelLabelForModuleDeps(ctx, headerLibs))
return headerLibsLabels
}
func Bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) (bazel.LabelListAttribute, bazel.LabelListAttribute) {
libraryDecorator := module.linker.(*libraryDecorator)
includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
includeDirs = append(includeDirs, libraryDecorator.flagExporter.Properties.Export_include_dirs...)
includeDirsLabels := android.BazelLabelForModuleSrc(ctx, includeDirs)
var includeDirGlobs []string
for _, includeDir := range includeDirs {
includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.h")
includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.inc")
includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.hpp")
}
headersLabels := android.BazelLabelForModuleSrc(ctx, includeDirGlobs)
return bazel.MakeLabelListAttribute(includeDirsLabels), bazel.MakeLabelListAttribute(headersLabels)
}
type bazelCcLibraryStaticAttributes struct {
Copts []string
Srcs bazel.LabelListAttribute
@ -2149,10 +2117,10 @@ func CcLibraryStaticBp2Build(ctx android.TopDownMutatorContext) {
allIncludes = append(allIncludes, localIncludeDirs...)
includesLabels := android.BazelLabelForModuleSrc(ctx, allIncludes)
exportedIncludesLabels, exportedIncludesHeadersLabels := Bp2BuildParseExportedIncludes(ctx, module)
exportedIncludesLabels, exportedIncludesHeadersLabels := bp2BuildParseExportedIncludes(ctx, module)
includesLabels.Append(exportedIncludesLabels.Value)
headerLibsLabels := Bp2BuildParseHeaderLibs(ctx, module)
headerLibsLabels := bp2BuildParseHeaderLibs(ctx, module)
depsLabels.Append(headerLibsLabels.Value)
attrs := &bazelCcLibraryStaticAttributes{

4
cc/library_headers.go
View File

@ -94,9 +94,9 @@ func CcLibraryHeadersBp2Build(ctx android.TopDownMutatorContext) {
return
}
exportedIncludesLabels, exportedIncludesHeadersLabels := Bp2BuildParseExportedIncludes(ctx, module)
exportedIncludesLabels, exportedIncludesHeadersLabels := bp2BuildParseExportedIncludes(ctx, module)
headerLibsLabels := Bp2BuildParseHeaderLibs(ctx, module)
headerLibsLabels := bp2BuildParseHeaderLibs(ctx, module)
attrs := &bazelCcLibraryHeadersAttributes{
Includes: exportedIncludesLabels,