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// Copyright 2019 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 (
"regexp"
"strings"
"android/soong/android"
"android/soong/rust/config"
)
func init() {
android.RegisterModuleType("rust_library", RustLibraryFactory)
android.RegisterModuleType("rust_library_dylib", RustLibraryDylibFactory)
android.RegisterModuleType("rust_library_rlib", RustLibraryRlibFactory)
android.RegisterModuleType("rust_library_host", RustLibraryHostFactory)
android.RegisterModuleType("rust_library_host_dylib", RustLibraryDylibHostFactory)
android.RegisterModuleType("rust_library_host_rlib", RustLibraryRlibHostFactory)
android.RegisterModuleType("rust_library_shared", RustLibrarySharedFactory)
android.RegisterModuleType("rust_library_static", RustLibraryStaticFactory)
android.RegisterModuleType("rust_library_host_shared", RustLibrarySharedHostFactory)
android.RegisterModuleType("rust_library_host_static", RustLibraryStaticHostFactory)
}
type VariantLibraryProperties struct {
Enabled *bool `android:"arch_variant"`
}
type LibraryCompilerProperties struct {
Rlib VariantLibraryProperties `android:"arch_variant"`
Dylib VariantLibraryProperties `android:"arch_variant"`
Shared VariantLibraryProperties `android:"arch_variant"`
Static VariantLibraryProperties `android:"arch_variant"`
// path to the source file that is the main entry point of the program (e.g. src/lib.rs)
Srcs []string `android:"path,arch_variant"`
// path to include directories to pass to cc_* modules, only relevant for static/shared variants.
Include_dirs []string `android:"path,arch_variant"`
}
type LibraryMutatedProperties struct {
// Build a dylib variant
BuildDylib bool `blueprint:"mutated"`
// Build an rlib variant
BuildRlib bool `blueprint:"mutated"`
// Build a shared library variant
BuildShared bool `blueprint:"mutated"`
// Build a static library variant
BuildStatic bool `blueprint:"mutated"`
// This variant is a dylib
VariantIsDylib bool `blueprint:"mutated"`
// This variant is an rlib
VariantIsRlib bool `blueprint:"mutated"`
// This variant is a shared library
VariantIsShared bool `blueprint:"mutated"`
// This variant is a static library
VariantIsStatic bool `blueprint:"mutated"`
}
type libraryDecorator struct {
*baseCompiler
Properties LibraryCompilerProperties
MutatedProperties LibraryMutatedProperties
distFile android.OptionalPath
unstrippedOutputFile android.Path
includeDirs android.Paths
}
type libraryInterface interface {
rlib() bool
dylib() bool
static() bool
shared() bool
// Returns true if the build options for the module have selected a particular build type
buildRlib() bool
buildDylib() bool
buildShared() bool
buildStatic() bool
// Sets a particular variant type
setRlib()
setDylib()
setShared()
setStatic()
// Build a specific library variant
BuildOnlyRlib()
BuildOnlyDylib()
BuildOnlyStatic()
BuildOnlyShared()
}
func (library *libraryDecorator) exportedDirs() []string {
return library.linkDirs
}
func (library *libraryDecorator) exportedDepFlags() []string {
return library.depFlags
}
func (library *libraryDecorator) reexportDirs(dirs ...string) {
library.linkDirs = android.FirstUniqueStrings(append(library.linkDirs, dirs...))
}
func (library *libraryDecorator) reexportDepFlags(flags ...string) {
library.depFlags = android.FirstUniqueStrings(append(library.depFlags, flags...))
}
func (library *libraryDecorator) rlib() bool {
return library.MutatedProperties.VariantIsRlib
}
func (library *libraryDecorator) dylib() bool {
return library.MutatedProperties.VariantIsDylib
}
func (library *libraryDecorator) shared() bool {
return library.MutatedProperties.VariantIsShared
}
func (library *libraryDecorator) static() bool {
return library.MutatedProperties.VariantIsStatic
}
func (library *libraryDecorator) buildRlib() bool {
return library.MutatedProperties.BuildRlib && BoolDefault(library.Properties.Rlib.Enabled, true)
}
func (library *libraryDecorator) buildDylib() bool {
return library.MutatedProperties.BuildDylib && BoolDefault(library.Properties.Dylib.Enabled, true)
}
func (library *libraryDecorator) buildShared() bool {
return library.MutatedProperties.BuildShared && BoolDefault(library.Properties.Shared.Enabled, true)
}
func (library *libraryDecorator) buildStatic() bool {
return library.MutatedProperties.BuildStatic && BoolDefault(library.Properties.Static.Enabled, true)
}
func (library *libraryDecorator) setRlib() {
library.MutatedProperties.VariantIsRlib = true
library.MutatedProperties.VariantIsDylib = false
library.MutatedProperties.VariantIsStatic = false
library.MutatedProperties.VariantIsShared = false
}
func (library *libraryDecorator) setDylib() {
library.MutatedProperties.VariantIsRlib = false
library.MutatedProperties.VariantIsDylib = true
library.MutatedProperties.VariantIsStatic = false
library.MutatedProperties.VariantIsShared = false
}
func (library *libraryDecorator) setShared() {
library.MutatedProperties.VariantIsStatic = false
library.MutatedProperties.VariantIsShared = true
library.MutatedProperties.VariantIsRlib = false
library.MutatedProperties.VariantIsDylib = false
}
func (library *libraryDecorator) setStatic() {
library.MutatedProperties.VariantIsStatic = true
library.MutatedProperties.VariantIsShared = false
library.MutatedProperties.VariantIsRlib = false
library.MutatedProperties.VariantIsDylib = false
}
var _ compiler = (*libraryDecorator)(nil)
var _ libraryInterface = (*libraryDecorator)(nil)
// rust_library produces all variants.
func RustLibraryFactory() android.Module {
module, _ := NewRustLibrary(android.HostAndDeviceSupported)
return module.Init()
}
// rust_library_dylib produces a dylib.
func RustLibraryDylibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyDylib()
return module.Init()
}
// rust_library_rlib produces an rlib.
func RustLibraryRlibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyRlib()
return module.Init()
}
// rust_library_shared produces a shared library.
func RustLibrarySharedFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyShared()
return module.Init()
}
// rust_library_static produces a static library.
func RustLibraryStaticFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyStatic()
return module.Init()
}
// rust_library_host produces all variants.
func RustLibraryHostFactory() android.Module {
module, _ := NewRustLibrary(android.HostSupported)
return module.Init()
}
// rust_library_dylib_host produces a dylib.
func RustLibraryDylibHostFactory() android.Module {
module, library := NewRustLibrary(android.HostSupported)
library.BuildOnlyDylib()
return module.Init()
}
// rust_library_rlib_host produces an rlib.
func RustLibraryRlibHostFactory() android.Module {
module, library := NewRustLibrary(android.HostSupported)
library.BuildOnlyRlib()
return module.Init()
}
// rust_library_static_host produces a static library.
func RustLibraryStaticHostFactory() android.Module {
module, library := NewRustLibrary(android.HostSupported)
library.BuildOnlyStatic()
return module.Init()
}
// rust_library_shared_host produces an shared library.
func RustLibrarySharedHostFactory() android.Module {
module, library := NewRustLibrary(android.HostSupported)
library.BuildOnlyShared()
return module.Init()
}
func (library *libraryDecorator) BuildOnlyDylib() {
library.MutatedProperties.BuildRlib = false
library.MutatedProperties.BuildShared = false
library.MutatedProperties.BuildStatic = false
}
func (library *libraryDecorator) BuildOnlyRlib() {
library.MutatedProperties.BuildDylib = false
library.MutatedProperties.BuildShared = false
library.MutatedProperties.BuildStatic = false
}
func (library *libraryDecorator) BuildOnlyStatic() {
library.MutatedProperties.BuildShared = false
library.MutatedProperties.BuildRlib = false
library.MutatedProperties.BuildDylib = false
}
func (library *libraryDecorator) BuildOnlyShared() {
library.MutatedProperties.BuildStatic = false
library.MutatedProperties.BuildRlib = false
library.MutatedProperties.BuildDylib = false
}
func NewRustLibrary(hod android.HostOrDeviceSupported) (*Module, *libraryDecorator) {
module := newModule(hod, android.MultilibFirst)
library := &libraryDecorator{
MutatedProperties: LibraryMutatedProperties{
BuildDylib: true,
BuildRlib: true,
BuildShared: true,
BuildStatic: true,
},
baseCompiler: NewBaseCompiler("lib", "lib64", InstallInSystem),
}
module.compiler = library
return module, library
}
func (library *libraryDecorator) compilerProps() []interface{} {
return append(library.baseCompiler.compilerProps(),
&library.Properties,
&library.MutatedProperties)
}
func (library *libraryDecorator) compilerDeps(ctx DepsContext, deps Deps) Deps {
// TODO(b/144861059) Remove if C libraries support dylib linkage in the future.
if !ctx.Host() && (library.static() || library.shared()) {
library.setNoStdlibs()
for _, stdlib := range config.Stdlibs {
deps.Rlibs = append(deps.Rlibs, stdlib+".static")
}
}
deps = library.baseCompiler.compilerDeps(ctx, deps)
if ctx.toolchain().Bionic() && (library.dylib() || library.shared()) {
deps = library.baseCompiler.bionicDeps(ctx, deps)
}
return deps
}
func (library *libraryDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
flags.RustFlags = append(flags.RustFlags, "-C metadata="+ctx.baseModuleName())
flags = library.baseCompiler.compilerFlags(ctx, flags)
if library.shared() || library.static() {
library.includeDirs = append(library.includeDirs, android.PathsForModuleSrc(ctx, library.Properties.Include_dirs)...)
}
return flags
}
func (library *libraryDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) android.Path {
var outputFile android.WritablePath
srcPath := srcPathFromModuleSrcs(ctx, library.Properties.Srcs)
flags.RustFlags = append(flags.RustFlags, deps.depFlags...)
if library.dylib() {
// We need prefer-dynamic for now to avoid linking in the static stdlib. See:
// https://github.com/rust-lang/rust/issues/19680
// https://github.com/rust-lang/rust/issues/34909
flags.RustFlags = append(flags.RustFlags, "-C prefer-dynamic")
}
if library.rlib() {
fileName := library.getStem(ctx) + ctx.toolchain().RlibSuffix()
outputFile = android.PathForModuleOut(ctx, fileName)
TransformSrctoRlib(ctx, srcPath, deps, flags, outputFile, deps.linkDirs)
} else if library.dylib() {
fileName := library.getStem(ctx) + ctx.toolchain().DylibSuffix()
outputFile = android.PathForModuleOut(ctx, fileName)
TransformSrctoDylib(ctx, srcPath, deps, flags, outputFile, deps.linkDirs)
} else if library.static() {
fileName := library.getStem(ctx) + ctx.toolchain().StaticLibSuffix()
outputFile = android.PathForModuleOut(ctx, fileName)
TransformSrctoStatic(ctx, srcPath, deps, flags, outputFile, deps.linkDirs)
} else if library.shared() {
fileName := library.getStem(ctx) + ctx.toolchain().SharedLibSuffix()
outputFile = android.PathForModuleOut(ctx, fileName)
TransformSrctoShared(ctx, srcPath, deps, flags, outputFile, deps.linkDirs)
}
if library.rlib() || library.dylib() {
library.reexportDirs(deps.linkDirs...)
library.reexportDepFlags(deps.depFlags...)
}
library.unstrippedOutputFile = outputFile
return outputFile
}
func (library *libraryDecorator) getStem(ctx ModuleContext) string {
stem := library.baseCompiler.getStemWithoutSuffix(ctx)
validateLibraryStem(ctx, stem, library.crateName())
return stem + String(library.baseCompiler.Properties.Suffix)
}
var validCrateName = regexp.MustCompile("[^a-zA-Z0-9_]+")
func validateLibraryStem(ctx BaseModuleContext, filename string, crate_name string) {
if crate_name == "" {
ctx.PropertyErrorf("crate_name", "crate_name must be defined.")
}
// crate_names are used for the library output file, and rustc expects these
// to be alphanumeric with underscores allowed.
if validCrateName.MatchString(crate_name) {
ctx.PropertyErrorf("crate_name",
"library crate_names must be alphanumeric with underscores allowed")
}
// Libraries are expected to begin with "lib" followed by the crate_name
if !strings.HasPrefix(filename, "lib"+crate_name) {
ctx.ModuleErrorf("Invalid name or stem property; library filenames must start with lib<crate_name>")
}
}
func LibraryMutator(mctx android.BottomUpMutatorContext) {
if m, ok := mctx.Module().(*Module); ok && m.compiler != nil {
switch library := m.compiler.(type) {
case libraryInterface:
// We only build the rust library variants here. This assumes that
// LinkageMutator runs first and there's an empty variant
// if rust variants are required.
if !library.static() && !library.shared() {
if library.buildRlib() && library.buildDylib() {
modules := mctx.CreateLocalVariations("rlib", "dylib")
rlib := modules[0].(*Module)
dylib := modules[1].(*Module)
rlib.compiler.(libraryInterface).setRlib()
dylib.compiler.(libraryInterface).setDylib()
} else if library.buildRlib() {
modules := mctx.CreateLocalVariations("rlib")
modules[0].(*Module).compiler.(libraryInterface).setRlib()
} else if library.buildDylib() {
modules := mctx.CreateLocalVariations("dylib")
modules[0].(*Module).compiler.(libraryInterface).setDylib()
}
}
}
}
}