58852a05f3
Also fix some bugs pertaining to configurable attribute handling of bool attributes and label sttributes, so that they may support values across multiple different axes at the same time. Test: unit tests for bp2build Test: mixed_droid Change-Id: I411efcfddf02d55dbc0775962068a11348a8bb2c
235 lines
8.6 KiB
Go
235 lines
8.6 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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"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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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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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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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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)
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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 = map[string]string{
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archArm: "//build/bazel/platforms/arch:arm",
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archArm64: "//build/bazel/platforms/arch:arm64",
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archX86: "//build/bazel/platforms/arch:x86",
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archX86_64: "//build/bazel/platforms/arch:x86_64",
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ConditionsDefaultConfigKey: ConditionsDefaultSelectKey, // The default condition of as arch select map.
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}
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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",
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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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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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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, 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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)
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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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)
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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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}[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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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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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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)
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// ProductVariableConfigurationAxis returns an axis for the given product variable
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func ProductVariableConfigurationAxis(variable string) ConfigurationAxis {
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return ConfigurationAxis{
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configurationType: productVariables,
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subType: variable,
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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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}
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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 true
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}
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return ca.subType < other.subType
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}
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