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//
// Copyright (C)
2021 The Android Open Source Project
//
// 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 rust
import (
"path"
"path/filepath"
"strings"
"android/soong/android"
"android/soong/rust/config"
"github.com/google/blueprint/proptools"
)
// This module is used to compile the rust toolchain libraries
// When RUST_PREBUILTS_VERSION is set, the library will generated
// from the given Rust version.
func init() {
android.RegisterModuleType("rust_toolchain_library",
rustToolchainLibraryFactory)
android.RegisterModuleType("rust_toolchain_library_rlib",
rustToolchainLibraryRlibFactory)
android.RegisterModuleType("rust_toolchain_library_dylib",
rustToolchainLibraryDylibFactory)
android.RegisterModuleType("rust_stdlib_prebuilt_host",
rustHostPrebuiltSysrootLibraryFactory)
}
type toolchainLibraryProperties struct {
// path to the toolchain crate root, relative to the top of the toolchain source
Toolchain_crate_root *string `android:"arch_variant"`
// path to the rest of the toolchain srcs, relative to the top of the toolchain source
Toolchain_srcs []string `android:"arch_variant"`
}
type toolchainLibraryDecorator struct {
*libraryDecorator
Properties toolchainLibraryProperties
}
// toolchainCrateRoot implements toolchainCompiler.
func (t *toolchainLibraryDecorator) toolchainCrateRoot() *string {
return t.Properties.Toolchain_crate_root
}
// toolchainSrcs implements toolchainCompiler.
func (t *toolchainLibraryDecorator) toolchainSrcs() []string {
return t.Properties.Toolchain_srcs
}
// rust_toolchain_library produces all rust variants.
func rustToolchainLibraryFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyRust()
return initToolchainLibrary(module, library)
}
// rust_toolchain_library_dylib produces a dylib.
func rustToolchainLibraryDylibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyDylib()
return initToolchainLibrary(module, library)
}
// rust_toolchain_library_rlib produces an rlib.
func rustToolchainLibraryRlibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyRlib()
return initToolchainLibrary(module, library)
}
func initToolchainLibrary(module *Module, library *libraryDecorator) android.Module {
toolchainLibrary := &toolchainLibraryDecorator{
libraryDecorator: library,
}
module.compiler = toolchainLibrary
module.AddProperties(&toolchainLibrary.Properties)
android.AddLoadHook(module, rustSetToolchainSource)
return module.Init()
}
type toolchainCompiler interface {
toolchainCrateRoot() *string
toolchainSrcs() []string
}
var _ toolchainCompiler = (*toolchainLibraryDecorator)(nil)
func rustSetToolchainSource(ctx android.LoadHookContext) {
if toolchainLib, ok := ctx.Module().(*Module).compiler.(toolchainCompiler); ok {
prefix := filepath.Join(GetRustPrebuiltVersion(ctx))
versionedCrateRoot := path.Join(prefix, android.String(toolchainLib.toolchainCrateR
oot()))
versionedSrcs := make([]string, len(toolchainLib.toolchainSrcs()))
for i, src := range toolchainLib.toolchainSrcs() {
versionedSrcs[i] = path.Join(prefix, src)
}
type props struct {
Crate_root *string
Srcs []string
}
p := &props{}
p.Crate_root = &versionedCrateRoot
p.Srcs = versionedSrcs
ctx.AppendProperties(p)
} else {
ctx.ModuleErrorf("Called rustSetToolchainSource on a non-Toolchain Module.")
}
}
// GetRustPrebuiltVersion returns the RUST_PREBUILTS_VERSION env var, or the default version if it is not defined.
func GetRustPrebuiltVersion(ctx android.LoadHookContext) string {
return ctx.Config().GetenvWithDefault("RUST_PREBUILTS_VERSION", config.RustDefaultVersion)
}
type hostPrebuiltTargetProps struct {
Suffix *string
Dylib struct {
Srcs []string
}
Rlib struct {
Srcs []string
}
Link_dirs []string
Enabled *bool
Force_use_prebuilt *bool
}
type hostPrebuiltProps struct {
Name *string
Enabled *bool
Target struct {
Linux_glibc_x86_64 hostPrebuiltTargetProps
Linux_glibc_x86 hostPrebuiltTargetProps
Linux_musl_x86_64 hostPrebuiltTargetProps
Linux_musl_x86 hostPrebuiltTargetProps
Darwin_x86_64 hostPrebuiltTargetProps
}
}
func rustHostPrebuiltSysrootLibraryFactory() android.Module {
module, _ := NewPrebuiltLibrary(android.HostSupportedNoCross)
android.AddLoadHook(module, constructLibProps( /*rlib=*/ true /*solib=*/, true))
return module.Init()
}
func constructLibProps(rlib, solib bool) func(ctx android.LoadHookContext) {
return func(ctx android.LoadHookContext) {
rustDir := path.Join(GetRustPrebuiltVersion(ctx), "lib", "rustlib")
name := android.RemoveOptionalPrebuiltPrefix(ctx.ModuleName())
name = strings.Replace(name, ".rust_sysroot", "", -1)
_, platform := filepath.Split(ctx.ModuleDir())
p := hostPrebuiltProps{}
p.Enabled = proptools.BoolPtr(false)
if platform == "linux-x86" && ctx.Config().BuildOS == android.Linux {
p.Target.Linux_glibc_x86_64.addPrebuiltToTarget(ctx, name, rustDir, "linux-x86", "x86_64-unknown-linux-gnu", rlib, solib)
p.Target.Linux_glibc_x86.addPrebuiltToTarget(ctx, name, rustDir, "linux-x86", "i686-unknown-linux-gnu", rlib, solib)
} else if platform == "linux-musl-x86" && ctx.Config().BuildOS == android.LinuxMusl {
p.Target.Linux_musl_x86_64.addPrebuiltToTarget(ctx, name, rustDir, "linux-musl-x86", "x86_64-unknown-linux-musl", rlib, solib)
p.Target.Linux_musl_x86.addPrebuiltToTarget(ctx, name, rustDir, "linux-musl-x86", "i686-unknown-linux-musl", rlib, solib)
} else if platform == "darwin" && ctx.Config().BuildOS == android.Darwin {
p.Target.Darwin_x86_64.addPrebuiltToTarget(ctx, name, rustDir, "darwin-x86", "x86_64-apple-darwin", rlib, solib)
} else {
p.Name = proptools.StringPtr("prebuilt_" + ctx.ModuleName() + "." + platform)
}
ctx.AppendProperties(&p)
}
}
func (target *hostPrebuiltTargetProps) addPrebuiltToTarget(ctx android.LoadHookContext, libName, rustDir, platform, arch string, rlib, solib bool) {
dir := path.Join(rustDir, arch, "lib")
target.Link_dirs = []string{dir}
target.Enabled = proptools.BoolPtr(true)
target.Force_use_prebuilt = proptools.BoolPtr(true)
if rlib {
rlib, suffix := getPrebuilt(ctx, dir, libName, ".rlib")
target.Rlib.Srcs = []string{rlib}
target.Suffix = proptools.StringPtr(suffix)
}
if solib {
// The suffixes are the same between the dylib and the rlib,
// so it's okay if we overwrite the rlib suffix
var soSuffix string
if strings.Contains(platform, "darwin") {
soSuffix = ".dylib"
} else {
soSuffix = ".so"
}
dylib, suffix := getPrebuilt(ctx, dir, libName, soSuffix)
target.Dylib.Srcs = []string{dylib}
target.Suffix = proptools.StringPtr(suffix)
}
}
// getPrebuilt returns the module relative Rust library path and the suffix hash.
func getPrebuilt(ctx android.LoadHookContext, dir, lib, extension string) (string, string) {
globPath := path.Join(ctx.ModuleDir(), dir, lib) + "-*" + extension
libMatches := ctx.Glob(globPath, nil)
if len(libMatches) != 1 {
ctx.ModuleErrorf("Unexpected number of matches for prebuilt libraries at path %q, found %d matches", globPath, len(libMatches))
return "", ""
}
// Collect the suffix by trimming the extension from the Base, then removing the library name and hyphen.
suffix := strings.TrimSuffix(libMatches[0].Base(), extension)[len(lib)+1:]
// Get the relative path from the match by trimming out the module directory.
relPath := strings.TrimPrefix(libMatches[0].String(), ctx.ModuleDir()+"/")
return relPath, suffix
}