4242f10462
These are created by bp2build in /build/bazel/rules/apex. Eventually these config_settings should likely be colocated with the source apex definition. Another alternative was to make Bazel's apex a macro that generates a config_setting. I did not pursue this further for now since it requires the apex_available of every allowlisted cc_library to also be allowlisted. This might not always be true (e.g. com.android.runtime) Test: go test ./bp2build Change-Id: Ibbb14b0d9c1491b3c79b7634a18d9d35b03922c1
352 lines
12 KiB
Go
352 lines
12 KiB
Go
// Copyright 2021 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package bazel
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import (
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"fmt"
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"math"
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"sort"
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"strings"
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)
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const (
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// ArchType names in arch.go
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archArm = "arm"
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archArm64 = "arm64"
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archRiscv64 = "riscv64"
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archX86 = "x86"
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archX86_64 = "x86_64"
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// OsType names in arch.go
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OsAndroid = "android"
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osDarwin = "darwin"
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osLinux = "linux_glibc"
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osLinuxMusl = "linux_musl"
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osLinuxBionic = "linux_bionic"
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osWindows = "windows"
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// Targets in arch.go
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osArchAndroidArm = "android_arm"
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osArchAndroidArm64 = "android_arm64"
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osArchAndroidRiscv64 = "android_riscv64"
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osArchAndroidX86 = "android_x86"
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osArchAndroidX86_64 = "android_x86_64"
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osArchDarwinArm64 = "darwin_arm64"
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osArchDarwinX86_64 = "darwin_x86_64"
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osArchLinuxX86 = "linux_glibc_x86"
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osArchLinuxX86_64 = "linux_glibc_x86_64"
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osArchLinuxMuslArm = "linux_musl_arm"
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osArchLinuxMuslArm64 = "linux_musl_arm64"
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osArchLinuxMuslX86 = "linux_musl_x86"
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osArchLinuxMuslX86_64 = "linux_musl_x86_64"
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osArchLinuxBionicArm64 = "linux_bionic_arm64"
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osArchLinuxBionicX86_64 = "linux_bionic_x86_64"
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osArchWindowsX86 = "windows_x86"
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osArchWindowsX86_64 = "windows_x86_64"
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// This is the string representation of the default condition wherever a
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// configurable attribute is used in a select statement, i.e.
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// //conditions:default for Bazel.
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//
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// This is consistently named "conditions_default" to mirror the Soong
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// config variable default key in an Android.bp file, although there's no
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// integration with Soong config variables (yet).
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ConditionsDefaultConfigKey = "conditions_default"
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ConditionsDefaultSelectKey = "//conditions:default"
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productVariableBazelPackage = "//build/bazel/product_variables"
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AndroidAndInApex = "android-in_apex"
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AndroidAndNonApex = "android-non_apex"
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InApex = "in_apex"
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NonApex = "non_apex"
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)
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func PowerSetWithoutEmptySet[T any](items []T) [][]T {
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resultSize := int(math.Pow(2, float64(len(items))))
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powerSet := make([][]T, 0, resultSize-1)
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for i := 1; i < resultSize; i++ {
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combination := make([]T, 0)
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for j := 0; j < len(items); j++ {
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if (i>>j)%2 == 1 {
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combination = append(combination, items[j])
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}
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}
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powerSet = append(powerSet, combination)
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}
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return powerSet
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}
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func createPlatformArchMap() map[string]string {
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// Copy of archFeatures from android/arch_list.go because the bazel
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// package can't access the android package
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archFeatures := map[string][]string{
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"arm": {
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"neon",
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},
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"arm64": {
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"dotprod",
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},
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"riscv64": {},
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"x86": {
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"ssse3",
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"sse4",
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"sse4_1",
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"sse4_2",
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"aes_ni",
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"avx",
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"avx2",
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"avx512",
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"popcnt",
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"movbe",
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},
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"x86_64": {
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"ssse3",
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"sse4",
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"sse4_1",
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"sse4_2",
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"aes_ni",
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"avx",
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"avx2",
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"avx512",
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"popcnt",
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},
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}
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result := make(map[string]string)
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for arch, allFeatures := range archFeatures {
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result[arch] = "//build/bazel/platforms/arch:" + arch
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// Sometimes we want to select on multiple features being active, so
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// add the power set of all possible features to the map. More details
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// in android.ModuleBase.GetArchVariantProperties
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for _, features := range PowerSetWithoutEmptySet(allFeatures) {
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sort.Strings(features)
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archFeaturesName := arch + "-" + strings.Join(features, "-")
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result[archFeaturesName] = "//build/bazel/platforms/arch/variants:" + archFeaturesName
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}
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}
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result[ConditionsDefaultConfigKey] = ConditionsDefaultSelectKey
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return result
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}
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var (
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// These are the list of OSes and architectures with a Bazel config_setting
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// and constraint value equivalent. These exist in arch.go, but the android
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// package depends on the bazel package, so a cyclic dependency prevents
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// using those variables here.
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// A map of architectures to the Bazel label of the constraint_value
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// for the @platforms//cpu:cpu constraint_setting
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platformArchMap = createPlatformArchMap()
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// A map of target operating systems to the Bazel label of the
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// constraint_value for the @platforms//os:os constraint_setting
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platformOsMap = map[string]string{
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OsAndroid: "//build/bazel/platforms/os:android",
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osDarwin: "//build/bazel/platforms/os:darwin",
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osLinux: "//build/bazel/platforms/os:linux_glibc",
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osLinuxMusl: "//build/bazel/platforms/os:linux_musl",
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osLinuxBionic: "//build/bazel/platforms/os:linux_bionic",
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osWindows: "//build/bazel/platforms/os:windows",
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ConditionsDefaultConfigKey: ConditionsDefaultSelectKey, // The default condition of an os select map.
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}
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platformOsArchMap = map[string]string{
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osArchAndroidArm: "//build/bazel/platforms/os_arch:android_arm",
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osArchAndroidArm64: "//build/bazel/platforms/os_arch:android_arm64",
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osArchAndroidRiscv64: "//build/bazel/platforms/os_arch:android_riscv64",
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osArchAndroidX86: "//build/bazel/platforms/os_arch:android_x86",
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osArchAndroidX86_64: "//build/bazel/platforms/os_arch:android_x86_64",
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osArchDarwinArm64: "//build/bazel/platforms/os_arch:darwin_arm64",
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osArchDarwinX86_64: "//build/bazel/platforms/os_arch:darwin_x86_64",
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osArchLinuxX86: "//build/bazel/platforms/os_arch:linux_glibc_x86",
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osArchLinuxX86_64: "//build/bazel/platforms/os_arch:linux_glibc_x86_64",
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osArchLinuxMuslArm: "//build/bazel/platforms/os_arch:linux_musl_arm",
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osArchLinuxMuslArm64: "//build/bazel/platforms/os_arch:linux_musl_arm64",
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osArchLinuxMuslX86: "//build/bazel/platforms/os_arch:linux_musl_x86",
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osArchLinuxMuslX86_64: "//build/bazel/platforms/os_arch:linux_musl_x86_64",
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osArchLinuxBionicArm64: "//build/bazel/platforms/os_arch:linux_bionic_arm64",
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osArchLinuxBionicX86_64: "//build/bazel/platforms/os_arch:linux_bionic_x86_64",
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osArchWindowsX86: "//build/bazel/platforms/os_arch:windows_x86",
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osArchWindowsX86_64: "//build/bazel/platforms/os_arch:windows_x86_64",
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ConditionsDefaultConfigKey: ConditionsDefaultSelectKey, // The default condition of an os select map.
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}
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// Map where keys are OsType names, and values are slices containing the archs
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// that that OS supports.
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// These definitions copied from arch.go.
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// TODO(cparsons): Source from arch.go; this task is nontrivial, as it currently results
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// in a cyclic dependency.
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osToArchMap = map[string][]string{
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OsAndroid: {archArm, archArm64, archRiscv64, archX86, archX86_64},
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osLinux: {archX86, archX86_64},
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osLinuxMusl: {archX86, archX86_64},
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osDarwin: {archArm64, archX86_64},
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osLinuxBionic: {archArm64, archX86_64},
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// TODO(cparsons): According to arch.go, this should contain archArm, archArm64, as well.
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osWindows: {archX86, archX86_64},
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}
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osAndInApexMap = map[string]string{
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AndroidAndInApex: "//build/bazel/rules/apex:android-in_apex",
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AndroidAndNonApex: "//build/bazel/rules/apex:android-non_apex",
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osDarwin: "//build/bazel/platforms/os:darwin",
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osLinux: "//build/bazel/platforms/os:linux_glibc",
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osLinuxMusl: "//build/bazel/platforms/os:linux_musl",
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osLinuxBionic: "//build/bazel/platforms/os:linux_bionic",
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osWindows: "//build/bazel/platforms/os:windows",
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ConditionsDefaultConfigKey: ConditionsDefaultSelectKey,
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}
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inApexMap = map[string]string{
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InApex: "//build/bazel/rules/apex:in_apex",
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NonApex: "//build/bazel/rules/apex:non_apex",
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ConditionsDefaultConfigKey: ConditionsDefaultSelectKey,
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}
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)
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// basic configuration types
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type configurationType int
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const (
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noConfig configurationType = iota
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arch
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os
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osArch
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productVariables
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osAndInApex
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inApex
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)
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func osArchString(os string, arch string) string {
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return fmt.Sprintf("%s_%s", os, arch)
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}
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func (ct configurationType) String() string {
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return map[configurationType]string{
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noConfig: "no_config",
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arch: "arch",
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os: "os",
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osArch: "arch_os",
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productVariables: "product_variables",
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osAndInApex: "os_in_apex",
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inApex: "in_apex",
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}[ct]
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}
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func (ct configurationType) validateConfig(config string) {
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switch ct {
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case noConfig:
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if config != "" {
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panic(fmt.Errorf("Cannot specify config with %s, but got %s", ct, config))
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}
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case arch:
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if _, ok := platformArchMap[config]; !ok {
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panic(fmt.Errorf("Unknown arch: %s", config))
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}
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case os:
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if _, ok := platformOsMap[config]; !ok {
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panic(fmt.Errorf("Unknown os: %s", config))
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}
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case osArch:
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if _, ok := platformOsArchMap[config]; !ok {
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panic(fmt.Errorf("Unknown os+arch: %s", config))
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}
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case productVariables:
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// do nothing
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case osAndInApex:
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// do nothing
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// this axis can contain additional per-apex keys
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case inApex:
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if _, ok := inApexMap[config]; !ok {
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panic(fmt.Errorf("Unknown in_apex config: %s", config))
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}
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default:
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panic(fmt.Errorf("Unrecognized ConfigurationType %d", ct))
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}
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}
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// SelectKey returns the Bazel select key for a given configurationType and config string.
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func (ca ConfigurationAxis) SelectKey(config string) string {
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ca.validateConfig(config)
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switch ca.configurationType {
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case noConfig:
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panic(fmt.Errorf("SelectKey is unnecessary for noConfig ConfigurationType "))
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case arch:
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return platformArchMap[config]
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case os:
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return platformOsMap[config]
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case osArch:
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return platformOsArchMap[config]
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case productVariables:
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if strings.HasSuffix(config, ConditionsDefaultConfigKey) {
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// e.g. "acme__feature1__conditions_default" or "android__board__conditions_default"
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return ConditionsDefaultSelectKey
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}
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return fmt.Sprintf("%s:%s", productVariableBazelPackage, config)
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case osAndInApex:
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if ret, exists := osAndInApexMap[config]; exists {
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return ret
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}
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return config
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case inApex:
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return inApexMap[config]
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default:
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panic(fmt.Errorf("Unrecognized ConfigurationType %d", ca.configurationType))
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}
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}
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var (
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// Indicating there is no configuration axis
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NoConfigAxis = ConfigurationAxis{configurationType: noConfig}
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// An axis for architecture-specific configurations
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ArchConfigurationAxis = ConfigurationAxis{configurationType: arch}
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// An axis for os-specific configurations
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OsConfigurationAxis = ConfigurationAxis{configurationType: os}
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// An axis for arch+os-specific configurations
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OsArchConfigurationAxis = ConfigurationAxis{configurationType: osArch}
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// An axis for os+in_apex-specific configurations
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OsAndInApexAxis = ConfigurationAxis{configurationType: osAndInApex}
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// An axis for in_apex-specific configurations
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InApexAxis = ConfigurationAxis{configurationType: inApex}
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)
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// ProductVariableConfigurationAxis returns an axis for the given product variable
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func ProductVariableConfigurationAxis(variable string, outerAxis ConfigurationAxis) ConfigurationAxis {
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return ConfigurationAxis{
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configurationType: productVariables,
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subType: variable,
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outerAxisType: outerAxis.configurationType,
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}
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}
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// ConfigurationAxis is an independent axis for configuration, there should be no overlap between
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// elements within an axis.
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type ConfigurationAxis struct {
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configurationType
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// some configuration types (e.g. productVariables) have multiple independent axes, subType helps
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// distinguish between them without needing to list all 17 product variables.
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subType string
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// used to keep track of which product variables are arch variant
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outerAxisType configurationType
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}
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func (ca *ConfigurationAxis) less(other ConfigurationAxis) bool {
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if ca.configurationType == other.configurationType {
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return ca.subType < other.subType
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}
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return ca.configurationType < other.configurationType
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}
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